JPH0463028A - paging device - Google Patents

Abstract

PURPOSE:To provide a small paging device with high functionality by providing an interface part at a receiver part to eliminate a display part and constituting a device for which a universal data input/output device can be connected as data input/output part. CONSTITUTION:A radio signal received with an antenna 11, after being demodulated at a demodulator 21, is level-compared, and digital data of baseband can be obtained. A series of digital data waveform-formed at a wave form forming circuit 13 are sent to a synchronous circuit 14 and a synchronous pattern collation circuit 16 sequentially. The synchronous pattern collation circuit 16 collates a series of digital data with a synchronous pattern stored in a synchronous pattern storage circuit 15, and detects the coincidence of the patterns. Also, a series of digital data outputted from the waveform forming circuit 13 are stored in memory 18 by a CLK2 generated from the synchronous circuit 14 and an address generated from an address generation circuit 17, and they can be read out from the data input/output part 110 at arbitrary time via an external interface 20.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a paging device used for a paging service that transmits data to a specific member using radio.

<Prior art> Devices used for paging services currently in use include paging receivers used in pager services, etc. that call a specific subscriber using means such as sound, light, or vibration. There are two types of machines that are widely used: one is a dedicated wireless paging machine, and the other is a message display type pager that has a display function and can receive and display text information.

<Problems to be Solved by the Invention> The calling-only machine has a simple mechanism and is suitable for miniaturization, but its function is limited to calling.

On the other hand, the message display type paging receiver has a higher added value than a call-only device, but has the problem that the number of components such as surface water equipment increases, which conflicts with the demand for miniaturization. Therefore, an object of the present invention is to provide a compact and highly functional paging device.

Means for Solving the Problems> In order to achieve the above-mentioned object, a paging device according to the present invention includes an antenna for receiving a wireless signal, and a device for demodulating the wireless signal received by the antenna to obtain digital data. a demodulator for extracting a synchronization pattern from the digital data and comparing it with the synchronization pattern of the own station; A receiver comprising an address generation section that generates an address, a storage section that stores the digital data at an address position generated by the address generation section, and an interface section that reads the digital data stored in the storage section. and a data input/output section that is connected to the receiver section via the interface section and displays digital data stored in the storage section.

Function: The demodulator demodulates the digitally modulated radio signal received by the antenna to obtain digital data. From this digital data, a synchronization pattern is extracted in the synchronization button verification section and is verified against the synchronization pattern of the own station. When the synchronization patterns match, the synchronization pattern matching section generates a pattern match signal, and in response to this pattern match signal, the address generation circuit generates an address for the storage section to store the received digital data, and specifies the data using this address. Store data where it is stored. The digital data thus stored is read out via the interface section by a general-purpose data input/output device such as an electronic notebook or pocket computer.

<Embodiment> FIG. 1 shows a schematic configuration of a basing device according to an embodiment of the present invention. In FIG. 1, 10 is a receiver section, II is an antenna that receives a radio signal, 12 is a demodulation section that demodulates the radio signal and outputs desired baseband digital data, and 13 is a shaper that shapes distorted digital data. A waveform shaping circuit 14 extracts timing from a synchronization signal of shaped digital data and outputs a clock synchronized with the digital data, and 15 a frame synchronization signal which is a synchronization pattern indicating the start point of data and the own station. A synchronization pattern storage circuit that stores ID information, I
Step 6 compares a frame synchronization signal indicating the start point of data from a series of synchronized digital data and the ID information of the called station with the frame synchronization pattern stored in the synchronization pattern storage circuit and the ID information of the own station. 17 is a synchronization pattern matching circuit; 17 is an address generation circuit that generates a write destination address for the memory from the matching result from the ID matching circuit and the synchronous clock from the synchronous circuit; 18 is a memory circuit that stores digital data; 19 is a reception end signal 20 is an external interface for communicating with a data input/output unit for reading digital data stored in the memory +8; This is an oscillation circuit that generates a reference clock or reference frequency.

+10 is the data input/output unit, and in addition to the dedicated equipment for the receiver unit, it can also be used for general-purpose equipment normally used by pager users, such as an electronic notebook with an interface, a pocket computer, a word processor, or a personal computer. Possible use.

FIG. 2 shows an example of the format of digital data to be communicated. 200 is a series of digital data, 201 is a focus synchronization signal for extracting synchronization typing, 202 is a frame synchronization signal for determining the data start point, 203 is ID information of the called station, 20
4 is data, and 205 is an end signal indicating the end of the data. A repeating signal of il 011 and "1" is often used as the pit synchronization signal, and a PN pattern is often used as the frame synchronization signal. Furthermore, if a signal for controlling errors in the digital data is added to the termination signal, data reliability can be expected to be improved.

The operation will be described below, taking as an example the case where the paging device shown in FIG. 1 is used to receive a series of digital data shown in FIG. 2.

A known frequency that is modulated with digital data such as a coded character or voice signal or a coded image signal using one predetermined modulation method from among known digital modulation methods such as FSK and PSK. The radio signal having the radio signal is received by an antenna 11 that is tuned to the frequency in advance. The radio signal received by the antenna is demodulated in the demodulation section 12 by a demodulation circuit compatible with the modulation method of the radio signal, and then the levels are compared to obtain baseband digital data. Demodulator] 2
can be made smaller by configuring it using a general single superheterodyne method or a direct conversion method. Digital data is Schmitt trigger
The signal is sent to a well-known waveform shaping circuit 13 such as a circuit for waveform shaping.

A series of waveform-shaped digital data is sequentially processed by a synchronous circuit! 4 and the synchronization pattern matching circuit 16. Many methods for configuring the synchronous circuit 14 have been known for a long time (for example, "Basics and New Technology of PcM Communication", edited by Hiroshi Inose, Sanpo (+968), P, 223-P, 228).

FIG. 3 shows an example of the configuration of the synchronous circuit 14, which is a general-purpose PLLIc.
302 (for example, CD-4046 (manufactured by RCA).

timing clock CLKI from the bit synchronization signal 201.

It generates CLK2.

Figure 4 shows pit synchronization signals 201, CLK I and CL
It shows the timing of K2.

The synchronization pattern matching circuit 16 matches the series of digital data with the synchronization pattern stored in the synchronization pattern storage circuit 15 and detects a match between the patterns.

FIG. 5 shows an example of the configuration of the synchronization pattern matching circuit 16,
CLKI and CLK2 are supplied from the synchronization circuit 14, and when the synchronization patterns match, a pattern match signal is output.

The address generation circuit 17 is triggered by the pattern matching signal to sequentially generate addresses, and can be easily configured with an up counter or the like. A series of digital data output from the waveform shaping circuit 13 is stored in the memory 18 using CLK2 generated by the synchronization circuit 14 and an address generated by the address generation circuit 17. The memory 18 must have a function to avoid conflicts between the data line from the receiver side and the data line from the outside, but this can be easily configured by using, for example, a dual port memory. memory 18
The data stored in can be read out from the data input/output section +10 at any time via external interfaces 20, including electrical and physical ones.

FIG. 6 shows an example of the configuration of a paging device having a transmission function (antenna 420, transmitter 421). The basic operation is the same as that of the above-described embodiment, but the establishment of synchronization, control of communication, access to memory, notification of reception, etc. are performed not by hardware but by nine-notware programmed in advance with the microcomputer 414. When transmitting data, a request is received from the data input/output section 510, and data communication is performed under the control of the microcomputer 414. By installing a microcomputer, it is possible to perform relatively sophisticated control such as error control. Note that 415 is a reception notification circuit, 416 is a synchronization pattern storage circuit, 417 is a memory, 418 is an external interface, 419 is an oscillation circuit, and 422 is a data bus.

As is clear from the above description, the receiver section 10 of the embodiment t in FIG. The burden of carrying the unit 10 becomes very light. Also, as a data input/output section, the pager user can
High-performance pager functions can be provided by using off-the-shelf devices that are frequently used on a daily basis, such as electronic notebooks, word processors, pocket computers, and personal computers, regardless of the pager.

As a dedicated data input/output section, one that has digital data decoding and encoding functions and transmits and receives data such as audio or images can be considered.

<Effects of the Invention> As described above, according to the present invention, the interface section is provided in the receiver section, the display section is eliminated, and the configuration is such that a general-purpose data input/output device can be connected as a data input/output section. can provide a highly functional paging device.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of a paging device according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of a communication data format, FIG. 3 is a configuration diagram of a synchronous circuit, and FIG. 4 is a timing diagram of a synchronous clock. FIG. 5 is a diagram showing the configuration of a synchronization pattern matching circuit, and FIG. 6 is a diagram showing the configuration of a basing device according to another embodiment of the present invention. DESCRIPTION OF SYMBOLS 11... Antenna, 12... Demodulation part, 13... Waveform shaping circuit, J4... Synchronization circuit, 15... Synchronization pattern storage circuit, I6... Synchronization pattern matching circuit, 17...
・Address generation circuit, 18...Memory, 19...Reception notification circuit, 20...External interface, llO・
...Data input/output section.

Claims (1)

[Claims] 1. An antenna that receives a radio signal, a demodulator that demodulates the radio signal received by the antenna to obtain digital data, and extracts a synchronization pattern from the digital data to synchronize its own station. a synchronization pattern matching section that matches the pattern; an address generation section that generates an address to store the digital data each time the synchronization pattern matching section detects a match of the synchronization pattern; and an address position generated by the address generation section. a receiver section including a storage section for storing the digital data, and an interface section for reading out the digital data stored in the storage section; A paging device comprising a data input/output unit that displays digital data stored in a storage unit.