JP2000285208A - Wireless communication system - Google Patents

Abstract

(57) [Problem] To provide a wireless communication system capable of securing a wide transmission area without complicating a circuit configuration. A generation unit (11) for generating a transmission signal to be transmitted to a non-contact communication medium, a modulation unit (12) for modulating a transmission signal generated by the generation unit, and a transmission modulated by the modulation unit A plurality of transmission means (21, 22, 3) each including a transmission circuit for amplifying a signal and a transmission antenna for transmitting a transmission signal amplified by the transmission circuit.
1, 32), receiving means (14, 15) each including a plurality of receiving antennas connected in series, each receiving a signal transmitted from a non-contact communication medium, and demodulating a received signal received by the receiving means. Demodulating means (13) for analyzing the received signal demodulated by the demodulating means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a wireless communication system for performing wireless communication with a non-contact communication medium such as a wireless card.

[0002]

2. Description of the Related Art As a wireless communication system, a wireless communication system for wirelessly communicating with a wireless card possessed by an entry / exit person and managing entry / exit, or a wireless tag attached to an article. There is known a wireless distribution management system that manages the distribution of goods by performing wireless communication.

[0003]

In a wireless communication system, a metal (plate) may be partially disposed to reduce spatial noise in a communication area between a non-contact wireless communication medium and a reader / writer. While this metal has the advantage of reducing spatial noise, it also has the disadvantage of reducing the transmittable area of the reader / writer. In order to solve this disadvantage, if the transmission capacity of the transmission circuit provided in the reader / writer is simply increased in order to increase the output of the transmission signal, the transmission circuit becomes larger, and as a result, the reader / writer becomes larger. A new problem has arisen. In addition, a wireless communication system capable of securing a wide receiving area without increasing the circuit size of the reader / writer has been required.

An object of the present invention has been made in view of the above-mentioned circumstances, and has as its object to provide the following radio communication system.

(1) A wireless communication system capable of securing a wide transmission area without complicating the circuit configuration.

(2) A wireless communication system capable of securing a wide reception area without complicating the circuit configuration.

[0007]

In order to solve the above-mentioned problems and achieve the object, a wireless communication system according to the present invention is configured as follows.

A wireless communication system according to the present invention is a wireless communication system for performing wireless communication with a non-contact communication medium, wherein the generation means generates a transmission signal to be transmitted to the non-contact communication medium; Modulating means for modulating the generated transmission signal, an amplification unit for amplifying the transmission signal modulated by the modulation means, and a plurality of transmission means including a transmission antenna for transmitting the transmission signal amplified by the amplification unit, A plurality of reception antennas each receiving a signal transmitted from the non-contact communication medium are connected in series and each have a transformer, and a predetermined component is extracted from a plurality of reception signals received by the plurality of reception antennas. Receiving means including a single receiving circuit; demodulating means for demodulating a received signal received by the receiving means and from which a predetermined component is extracted; And a analysis means for analyzing a received signal demodulated by.

According to a wireless communication system of the present invention, in a wireless communication system for performing wireless communication with a non-contact communication medium, generating means for generating a transmission signal to be transmitted to the non-contact communication medium; A modulating unit for modulating the generated transmission signal, a transmission circuit for amplifying the transmission signal modulated by the modulation unit, and a third circuit including the first and second areas including the transmission signal amplified by the transmission circuit.
Transmitting means including a transmitting antenna for transmitting to an area, a first receiving antenna for receiving a signal transmitted from a non-contact communication medium in the first area, and a signal received by the first receiving antenna. First receiving means including a first receiving circuit for extracting a predetermined component from a received signal;
A second receiving antenna for receiving a signal transmitted from the non-contact communication medium in the area of the second receiving antenna, and a second receiving circuit for extracting a predetermined component from a received signal received by the second receiving antenna. Receiving means, a first demodulating means for demodulating a received signal which is received by the first receiving means and from which a predetermined component is extracted, and a receiving means which is received by the second receiving means and from which a predetermined component is extracted A second demodulating unit for demodulating a signal; and a transmitting unit transmitting a predetermined transmission signal to the third area a plurality of times at different timings from the transmitting unit. The first and second receiving means sequentially receive a plurality of responses transmitted at different timings from each of the non-contact communication media in the area No. 2 and send the plurality of responses to the first and second demodulating means. Yo The demodulated reception signal sequentially supplied from the first demodulation unit and the reception signal sequentially supplied from the second demodulation unit are sequentially demodulated at different timings, and the reception signal is supplied to the transmission timing of the predetermined transmission signal. And an analyzing means for switching the received signals individually at corresponding different timings and individually analyzing the received signals individually received.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

First, a first embodiment of a wireless communication system according to the present invention will be described with reference to FIGS.

FIG. 1 is a block diagram schematically showing a wireless communication system according to the present invention.

As shown in FIG. 1, the wireless communication system includes a reader / writer 1, a reader / writer 2, a reader / writer 3,..., A reader / writer n, a transmission antenna 22, a transmission antenna 32, a reception antenna 15, and the like. ing.

The reader / writer 1 is provided with a control circuit 11, a modulation circuit 12, a demodulation circuit 13, and a reception circuit 14. The reader / writer 2 is provided with a transmission circuit 21. The reader / writer 3 is provided with a transmission circuit 31. Similarly, the reader / writer n is provided with a transmission circuit n1. That is, a transmission circuit is provided in each of the reader / writers 2 to n.

On the other hand, the non-contact communication medium 4 includes an antenna 4
1, a power supply circuit 42, a demodulation circuit 43, a control circuit 44, a modulation circuit 45, a memory 46, and the like.

Control circuit 11 provided in reader / writer 1
Generates transmission data to be transmitted to the non-contact communication medium 4. The transmission data generated by the control circuit 11 is modulated by the modulation circuit 12 to become a transmission signal, which is transmitted as a plurality of synchronized transmission signals to the transmission circuit 21, the transmission circuit 31,... After being amplified and transmitted, the signal is transmitted as transmission electromagnetic waves from transmission antennas (only the transmission antennas 22 and 32 are shown) connected to the respective transmission circuits. The transmission signal amplified by the transmission circuit 21 is transmitted from the transmission antenna 22 as a transmission electromagnetic wave. Transmission circuit 31
The transmission signal amplified in is transmitted from the transmission antenna 32 as a transmission electromagnetic wave. Incidentally, when the transmission antenna 22 and the transmission antenna 32 form a gate, the respective antennas are arranged at opposing positions.

When the non-contact communication medium 4 enters the transmission area of the transmitting antenna 22 and the transmitting antenna 32, the antenna 4
1, the transmission electromagnetic waves from the transmission antennas 22 and 32 are received. The transmission electromagnetic wave received by the antenna 41 is rectified and smoothed by the power supply circuit 42 to generate power required for the operation of the non-contact communication medium 4.
The transmission electromagnetic wave received by the antenna 41 is demodulated by the demodulation circuit 43, and the demodulated signal is transmitted to the control circuit 4.
4 and the memory 46. When transmitting the data processing result to the reader / writer 1, the data after the data processing is modulated by the modulation circuit 45 and transmitted from the antenna 41 as a transmission electromagnetic wave.

The transmission electromagnetic wave transmitted from the non-contact communication medium 4 is transmitted to a receiving antenna 15 provided in a wireless communication system.
Is received by The receiving antennas 15 are a plurality of receiving antennas each connected in series in order to secure a wide receiving range. However, when the required communication range can be ensured only by a single receiving antenna, it is not necessary to use a plurality of communication antennas. The reception electromagnetic wave received by the reception antenna 15 is converted into a necessary signal by the reception circuit 14, then demodulated by the demodulation circuit 13, and subjected to data processing (analysis) by the control circuit 11.

Here, referring to FIG.
The schematic configuration of No. 5 will be described. 2 (a) to 2
(D) is an example of the receiving antenna 15.

FIG. 2A shows a single receiving antenna. That is, it is a diagram illustrating a state in which the receiving antenna 15 is configured by only a single receiving antenna. FIG. 2 (b)
FIG. 3 is a diagram showing a receiving antenna to which a transformer is connected. By connecting a transformer, noise can be reduced. FIG. 2C is a diagram showing a plurality of receiving antennas each directly connected. By connecting a plurality of receiving antennas in series, the receiving range can be expanded. FIG. 2D is a diagram illustrating a plurality of receiving antennas each directly connected and each connected to a transformer. By connecting a plurality of receiving antennas in series, the receiving range can be expanded, and noise can be reduced by connecting a transformer to each receiving antenna.

Next, the communication range of the transmitting antenna and the receiving antenna will be described with reference to FIGS.
FIG. 3 is a diagram for explaining a change in the communication range due to the arrangement of the metal. FIG. 4 is a diagram for explaining an application of the arrangement of the transmitting antenna and the receiving antenna in the wireless communication system of the present invention.

FIG. 3A shows a case where the transmitting antenna 1a and the transmitting antenna 1b are connected in series in the free space, and the receiving antenna 2a and the receiving antenna 2b are also connected in series. In this case, the communication range of the transmitting antenna 1a and the transmitting antenna 1b extends as shown by the solid line, and the receiving antenna 2a and the receiving antenna 2b
The communication range extends as indicated by the dotted line.

FIG. 3B shows a case where a transmitting antenna 1a and a transmitting antenna 1b are connected in series and a receiving antenna 2b is arranged in a space where a metal (rod) is arranged at a predetermined position.
a and the receiving antenna 2b are also connected in series. In this case, the communication range of the transmitting antenna 1a and the transmitting antenna 1b extends as shown by the solid line, and the communication range of the receiving antenna 2a and the receiving antenna 2b extends as shown by the dotted line.

FIG. 4A shows a case where the transmitting antenna 22 and the transmitting antenna 23 are arranged at positions facing each other. Similarly, a plurality of receiving antennas 15 connected in series are arranged at positions facing each other. FIG. Also, as described above, the number of receiving circuits connected to the receiving antenna is one. At this time, the communication range of the transmission antenna 22 and the transmission antenna 23 expands as shown by a solid line,
The communication range of each receiving antenna 15 extends as shown by a dotted line.

FIG. 4B is a diagram showing a state in which the transmitting antenna 22 and the transmitting antenna 23 are arranged at positions facing each other, and a single receiving antenna 15 is arranged. Also,
In this case, it is assumed that the receiving antenna 15 has the ability to cover a wide area. At this time, the communication range of the transmission antenna 22 and the transmission antenna 23 expands as indicated by a solid line, and the communication range of the reception antenna 15 expands as indicated by a dotted line.

FIG. 4C shows a plurality of independent transmitting antennas (transmitting antenna 22, transmitting antenna 32,...).
FIG. 5 is a diagram showing a state where a plurality of receiving antennas 15 arranged in series at respective positions corresponding to the plurality of transmitting antennas are arranged. Further, as described above, one receiving circuit is connected to each receiving antenna. At this time, each transmission antenna (transmission antenna 22,
The communication range of the transmitting antennas 32,...) Extends as shown by the solid line, and the communication range of each receiving antenna 15 extends as shown by the dotted line.

FIG. 4D shows a plurality of independent transmitting antennas (the transmitting antenna 22, the transmitting antenna 32,...).
FIG. 3 is a diagram showing a state where a single receiving antenna 15 is arranged. In this case, the receiving antenna 15
It must have the ability to cover a wide area. At this time, the communication range of each transmitting antenna (the transmitting antenna 22, the transmitting antenna 32,...) Expands as shown by the solid line, and the communication range of the receiving antenna 15 expands as shown by the dotted line.

As described above, by connecting a plurality of transmitting circuits to each of a plurality of transmitting antennas, sufficient power is supplied to each transmitting antenna, and as a result, a wide transmitting area can be secured. . In addition, by using a single receiving circuit, the circuit configuration can be simplified and the circuit size can be reduced, and the received signal processing can be facilitated.

Next, a second embodiment of the wireless communication system of the present invention will be described with reference to FIGS.

FIG. 5 is a block diagram schematically showing a wireless communication system according to the present invention.

As shown in FIG. 5, the wireless communication system includes a reader / writer 10, a transmission antenna 110, a reception antenna 105, a reception antenna 106, and the like.

The reader / writer 10 includes a control circuit 101,
Modulation circuit 102, demodulation circuit 103, reception circuit 104, reception antenna 105, reception antenna 106, reception circuit 10
7, a demodulation circuit 108, a transmission circuit 109, and a transmission antenna 110 are provided. On the other hand, the non-contact communication medium 4 includes an antenna 41, a power supply circuit 42, a demodulation circuit 43, a control circuit 44, a modulation circuit 45, a memory 46, and the like.

Control circuit 1 provided in reader / writer 10
01 generates transmission data to be transmitted to the non-contact communication medium 4. The transmission data generated by the control circuit 101 is modulated by the modulation circuit 102 to become a transmission signal,
After being sent to the transmission circuit 201 and amplified, the transmission circuit 201
Is transmitted as a transmission electromagnetic wave from the transmission antenna 110 connected to the transmission antenna.

The non-contact communication medium 4 is connected to the transmitting antenna 110
, The transmission electromagnetic wave from the transmission antenna 110 is received by the antenna 41. The transmission electromagnetic wave received by the antenna 41 is rectified and smoothed by the power supply circuit 42 to generate power required for the operation of the non-contact communication medium 4. The transmission electromagnetic wave received by the antenna 41 is demodulated by the demodulation circuit 43, and the demodulated signal is processed by the control circuit 44 and the memory 46.
When transmitting the data processing result to the reader / writer 10, the data after the data processing is modulated by the modulation circuit 45 and transmitted from the antenna 41 as a transmission electromagnetic wave.

The transmission electromagnetic wave transmitted from the non-contact communication medium 4 is received by the receiving antenna 105 or the receiving antenna 106. The reception electromagnetic wave received by the reception antenna 105 is converted into a necessary signal by the reception circuit 104, then demodulated by the demodulation circuit 103, and subjected to data processing (analysis) by the control circuit 101. Similarly, the reception electromagnetic wave received by the reception antenna 106 is converted into a necessary signal by the reception circuit 107, then demodulated by the demodulation circuit 108, and subjected to data processing (analysis) by the control circuit 101.

Here, referring to FIG.
05, an arrangement example of the reception antenna 106 and the transmission antenna 110 (an arrangement example of a case applied to an entrance / exit gate) will be described. FIG. 6A is a perspective view schematically showing an entrance / exit gate, and FIG. 6B is a top view showing a communication range of each antenna. As shown in FIG. 6A, a transmitting antenna 110 is arranged on the boundary (one wall surface) between two entrance / exit gates, and a receiving antenna 105 is provided on the other wall surface of each entrance / exit gate.
And the receiving antenna 106. As shown in FIG. 6B, the communication range of the transmitting antenna 110 extends as indicated by a solid line, and the communication range of the receiving antennas 105 and 106 extends as indicated by a dotted line.

Here, a case will be described in which the non-contact communication medium 4 corresponds to a single lead, and a person carrying the non-contact communication medium 4 simultaneously passes through each entry / exit gate. In this case, each transmission electromagnetic wave transmitted from each non-contact communication medium 4 of each entrance / exit gate may collide with the reader / writer. Therefore, the control circuit 101 selectively switches the reception signals provided from the demodulation circuits 103 and 108 and sequentially analyzes the respective reception signals. When the non-contact communication medium 4 supports multi-read, the demodulation circuit 103 and the demodulation circuit 1
There is no need to switch the received signal provided from 08.

Subsequently, referring to FIG.
Will be described. As described above, when the non-contact communication medium 4 corresponds to a single lead, and a person having the non-contact communication medium 4 simultaneously passes through each of the entrance / exit gates, the transmission electromagnetic waves are transmitted by the reception antenna 105 and the reception antenna 106. Received, receiving circuit 10
4, the received signal 1 is provided from the demodulation circuit 103,
Received signal 2 from demodulation circuit 108 via reception circuit 107
Is provided. At this time, the demodulation circuit 103 and the control circuit 1
01 or a switch SW for selectively connecting the demodulation circuit 108 and the control circuit 101 is switched at the timing shown in FIG. Thus, the reception signal 1 is read out of the reception signals 1 and 2 corresponding to the data read command 1, and the reception signal 2 is read out of the reception signals 1 and 2 corresponding to the data read command 2. That is, the received signal 1 of the received signal 1 and the received signal 2 corresponding to the data read command 1 is supplied to the control circuit 101 and analyzed. Subsequently, of the received signal 1 and the received signal 2 corresponding to the data read command 2, the received signal 2 is transmitted to the control circuit 101.
Is supplied and analyzed.

Next, an application example of the second embodiment will be described with reference to FIG.

In the second embodiment, as described above, two entrance / exit gates are configured by an antenna unit having a set of three antennas of the receiving antenna 105, the receiving antenna 106, and the transmitting antenna 110. I have. In a modification of the second embodiment, as shown in FIG.
Four entry / exit gates are constituted by two sets of antenna units. In other words, two entry / exit gates are configured by an antenna unit having a set of three antennas, the receiving antenna 105, the receiving antenna 106, and the transmitting antenna 110, and the receiving antenna 105a, the receiving antenna 106a,
In addition, two entry / exit gates are configured by the antenna unit with the three antennas of the transmission antenna 110a as one set. In this modification, a metal plate is arranged between the receiving antenna 106 and the receiving antenna 105a. This is because when a person having a non-contact communication medium passes through the entrance / exit gate A interposed between the transmission antenna 110 and the reception antenna 106, the transmission electromagnetic wave from the non-contact communication medium is received by the reception antenna 105a. This is to prevent it from getting stuck. Conversely, when a person having a non-contact communication medium passes through the entrance / exit gate B sandwiched between the transmission antenna 110a and the reception antenna 105a, the reception antenna 106 receives the transmission electromagnetic wave from the non-contact communication medium. This is to make sure you don't do it.

As described above, by using a single transmission circuit, the circuit configuration can be simplified, the circuit scale can be reduced, and the transmission signal processing can be facilitated. Further, by employing the arrangement of the transmission antennas as shown in FIGS. 6 and 8, it is possible to cover a wide area with a small number of transmission antennas. Further, by arranging a plurality of receiving antennas, a wide receiving area can be secured, and a weak transmission signal from a non-contact communication medium can be reliably received.

[0042]

According to the present invention, the following radio communication system can be provided.

(1) A wireless communication system capable of securing a wide transmission area without complicating the circuit configuration.

(2) A wireless communication system capable of securing a wide reception area without complicating the circuit configuration.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing a wireless communication system (first embodiment) according to the present invention.

FIG. 2 is a diagram illustrating a schematic configuration of a receiving antenna of the wireless communication system illustrated in FIG. 1;

FIG. 3 is a diagram illustrating a change in a communication range due to the arrangement of a metal.

FIG. 4 is a diagram illustrating an application example of an arrangement of a transmitting antenna and a receiving antenna in the wireless communication system of the present invention.

FIG. 5 is a block diagram schematically showing a wireless communication system (second embodiment) according to the present invention.

FIG. 6 is a diagram illustrating an example of arrangement of reception antennas and transmission antennas in the wireless communication system illustrated in FIG. 5;

FIG. 7 is a diagram illustrating switching of a received signal in the wireless communication system illustrated in FIG. 5;

FIG. 8 is a timing chart for explaining a switching timing of a received signal in the wireless communication system shown in FIG. 5;

FIG. 9 is a diagram illustrating an application example of the wireless communication system illustrated in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Reader / writer 11 ... Control circuit 12 ... Modulation circuit 13 ... Demodulation circuit 14 ... Receiving circuit 15 ... Receiving antenna 2 ... Reader / writer 21 ... Transmitting circuit 22 ... Transmitting antenna 3 ... Reader / writer 31 ... Transmitting circuit 32 ... Transmitting antenna 4 ... Non-contact communication medium 41 Antenna 42 Power supply circuit 43 Demodulation circuit 44 Control circuit 45 Modulation circuit 46 Memory

Claims (9)

[Claims] 1. A wireless communication system for performing wireless communication with a non-contact communication medium, comprising: a generation unit that generates a transmission signal to be transmitted to the non-contact communication medium; and a transmission signal generated by the generation unit. A plurality of transmitting units each including a modulating unit for modulating, a transmitting circuit for amplifying the transmission signal modulated by the modulating unit, and a transmitting antenna for transmitting the transmitting signal amplified by the transmitting circuit; Receiving means for receiving a signal transmitted from the receiving means, demodulating means for demodulating the received signal received by the receiving means, and analyzing means for analyzing the received signal demodulated by the demodulating means. Wireless communication system. 2. A wireless communication system for performing wireless communication with a non-contact communication medium, comprising: generating means for generating a transmission signal to be transmitted to the non-contact communication medium; A plurality of transmitting units each including a modulating unit for modulating, a transmitting circuit for amplifying the transmission signal modulated by the modulating unit, and a transmitting antenna for transmitting the transmitting signal amplified by the transmitting circuit; Receiving means including a plurality of receiving antennas each connected in series to receive a signal transmitted from the receiving apparatus; demodulating means for demodulating a received signal received by the receiving means; and a receiving signal demodulated by the demodulating means. An analysis means for analyzing the following: A wireless communication system comprising: 3. A wireless communication system for performing wireless communication with a non-contact communication medium, comprising: generating means for generating a transmission signal to be transmitted to the non-contact communication medium; A plurality of transmitting units each including a modulating unit for modulating, a transmitting circuit for amplifying the transmission signal modulated by the modulating unit, and a transmitting antenna for transmitting the transmitting signal amplified by the transmitting circuit; A plurality of receiving antennas, each receiving a signal transmitted from the serially connected receiving antenna, and receiving means including a single receiving circuit for extracting a predetermined component from a received signal received by the plurality of receiving antennas, Demodulating means for demodulating a received signal from which a predetermined component is received by the receiving means, and analyzing means for analyzing the received signal demodulated by the demodulating means. Wireless communication system comprising the. 4. A wireless communication system for performing wireless communication with a non-contact communication medium, comprising: generating means for generating a transmission signal to be transmitted to the non-contact communication medium; A plurality of transmitting units including a modulating unit that modulates, an amplifying unit that amplifies the transmission signal modulated by the modulating unit, and a transmitting antenna that transmits the transmission signal amplified by the amplifying unit; and transmitting from the non-contact communication medium. Including a plurality of receiving antennas each connected in series and each having a transformer, and a single receiving circuit for extracting a predetermined component from a received signal received by the plurality of receiving antennas. Means, demodulation means for demodulating a reception signal received by the reception means from which a predetermined component is extracted, and analyzing the reception signal demodulated by the demodulation means. Wireless communication system comprising: the analyzing means that, the. 5. A wireless communication system for performing wireless communication with a non-contact communication medium, wherein: a generating means for generating a transmission signal to be transmitted to the non-contact communication medium; Modulating means for modulating; transmitting means for transmitting a transmission signal modulated by the modulating means; a plurality of receiving means for receiving a signal transmitted from a non-contact communication medium; and a plurality of receiving means for receiving the plurality of receiving means. A wireless communication system comprising: a plurality of demodulating units for demodulating each of the received signals; and an analyzing unit for analyzing the plurality of received signals demodulated by the plurality of demodulating units. 6. A wireless communication system for performing wireless communication with a non-contact communication medium, comprising: a generation unit for generating a transmission signal to be transmitted to the non-contact communication medium; and a transmission signal generated by the generation unit. Modulating means for modulating; transmitting means for transmitting a transmission signal modulated by the modulating means; a receiving antenna for receiving a signal transmitted from a non-contact communication medium; and a predetermined component from a received signal received by the receiving antenna. A plurality of receiving units each including a receiving circuit that extracts a plurality of received signals, a plurality of demodulating units that respectively demodulate a plurality of received signals received by the plurality of receiving units and from which a predetermined component is extracted, and a plurality of demodulating units. Analysis means for analyzing a plurality of demodulated received signals, respectively. 7. A wireless communication system for performing wireless communication with a non-contact communication medium, comprising: a generation unit that generates a transmission signal to be transmitted to the non-contact communication medium; and a transmission signal generated by the generation unit. Modulation means for modulating, a transmission circuit for amplifying the transmission signal modulated by the modulation means, and transmission means including a transmission antenna for transmitting the transmission signal amplified by the transmission circuit; A plurality of receiving units each including a receiving antenna for receiving a signal, and a receiving circuit for extracting a predetermined component from a received signal received by the receiving antenna, and a predetermined component received by the plurality of receiving units is extracted. A plurality of demodulating units for demodulating a plurality of received signals, respectively; a plurality of received signals demodulated by the plurality of demodulating units are individually received at different timings; , The wireless communication system characterized by comprising analyzing means for analyzing the received signal of the respective a. 8. A wireless communication system for performing wireless communication with a non-contact communication medium, comprising: a generation unit that generates a transmission signal to be transmitted to the non-contact communication medium; and a transmission signal generated by the generation unit. Modulation means for modulating, a transmission circuit for amplifying the transmission signal modulated by the modulation means, and transmission means including a transmission antenna for transmitting the transmission signal amplified by the transmission circuit; A plurality of receiving units each including a receiving antenna for receiving a signal, and a receiving circuit for extracting a predetermined component from a received signal received by the receiving antenna, and a predetermined component received by the plurality of receiving units is extracted. A plurality of demodulating means for demodulating a plurality of received signals, respectively; transmitting a predetermined transmission signal a plurality of times at different timings from the transmitting means; A plurality of responses transmitted at different timings from the plurality of non-contact communication media to each of the plurality of non-contact communication media by the plurality of receiving means, and a plurality of received signals demodulated at different timings by the plurality of demodulating means, respectively. Analyzing means for individually receiving the plurality of received signals at different timings corresponding to the transmission timing of the predetermined transmission signal, and sequentially analyzing each of the plurality of received signals. 9. A wireless communication system for performing wireless communication with a non-contact communication medium, wherein: a generating means for generating a transmission signal to be transmitted to the non-contact communication medium; A modulating means for modulating, a transmitting circuit for amplifying the transmission signal modulated by the modulating means, and a transmitting signal amplified by the transmitting circuit to a third area including the first and second areas. Transmitting means including a transmitting antenna; a first receiving antenna for receiving a signal transmitted from the non-contact communication medium in the first area; and a predetermined component from a received signal received by the first receiving antenna. First receiving means including a first receiving circuit for extracting, a second receiving antenna for receiving a signal transmitted from a non-contact communication medium in the second area, and a second receiving antenna A second receiving means including a second receiving circuit for extracting a predetermined component from the received signal received by the tenor; and a second demodulating means for demodulating the received signal from which the predetermined component is received and received by the first receiving means. 1 demodulating means, second demodulating means for demodulating a received signal received by the second receiving means and having a predetermined component extracted, and a third transmitting means for transmitting a predetermined transmitting signal at a different timing from the transmitting means to the third transmitting means. A plurality of responses are transmitted to the area a plurality of times, and a plurality of responses transmitted at different timings from the non-contact communication mediums of the first and second areas to the predetermined transmission signals are respectively transmitted to the first and second areas. The plurality of responses are successively demodulated at different timings by the first and second demodulation means, and the demodulated received signal sequentially supplied from the first demodulation means is received by the reception means. Analyzing means for switching the received signals sequentially supplied from the second demodulating means at different timings corresponding to the transmission timing of the predetermined transmission signal to individually receive the signals, and sequentially analyzing the received signals individually received; A wireless communication system comprising: