JP2002135164A - Quasi-millimeter-wave/millimeter-wave radio device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide quasi-millimeter-wave/millimeter-wave radio devices which can generate signals of proper stability, even in quasi-millimeter-wave and millimeter-wave bands, and can suppress frequency shift of the device to a minimum level. SOLUTION: The radio device is equipped with a reference frequency generator 101 which generates a reference frequency using GPS(global positioning system), a local transmitter 102 which configures a synthesizer by a PLL(phase- locked loop) circuit and generates signals of a criterion frequency used at a radio unit 103 using reference frequency, the radio unit 103 which comprises modulators and demodulators and receives radio signals from other radio devices, while it transmits radio signals, and a baseband signal generator 104 which generates the baseband signals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quasi-millimeter-wave / millimeter-wave radio apparatus for use in an information data transmission service using radio waves, and more particularly, to a quasi-millimeter-wave / millimeter-wave apparatus using a GPS and having high frequency stability. The present invention relates to a band wireless device.

[0002]

2. Description of the Related Art FIG. 4 shows a block diagram of a conventional radio apparatus. In FIG. 4, a wireless device 404 includes a reference frequency generator 401, a local oscillator 402, and a wireless unit 403. The local oscillator 402 is a phase-locked loop (PLL) circuit using a reference frequency generated by the reference frequency generation device 401 individually included in the wireless device 404, and forms a frequency synthesizer. Since modulation and demodulation are performed in the radio section 403 based on the signal generated from the frequency synthesizer, the frequency stability of various signals generated in the radio apparatus 404 is maintained at the reference frequency stability.

Japanese Patent Application Laid-Open No. 9-261716 discloses that in mobile communication, high-speed communication is realized by stabilizing the frequency at which the VCXO oscillates, enabling an increase in the number of channels, and selecting base stations at high speed. There is disclosed a mobile communication system that enables the following.

[0004]

The conventional radio apparatus has good frequency stability when the frequency used is relatively low, but handles high frequencies such as quasi-millimeter waves and millimeter waves. In a wireless device, even if the frequency stability is the same, for example, when a wireless device in the 1 GHz frequency band is compared with a wireless device in the tens of GHz frequency band, the frequency error of the wireless device in the tens of GHz frequency band is tens of times larger. There is a problem, and a quasi-millimeter wave / millimeter wave band wireless device is required to have more stable reference frequency.

The present invention has been made to solve such a problem, and an object of the present invention is to generate a highly stable reference frequency using a GPS and to transmit this reference frequency to each base station apparatus and terminal station apparatus. An object of the present invention is to provide a quasi-millimeter-wave / millimeter-wave band wireless device that minimizes frequency deviation by using the same.

[0006]

In order to solve the above problems, a quasi-millimeter wave / millimeter wave band radio apparatus according to the present invention has a GPS
And a PLL circuit using a reference frequency generated by the reference frequency generator.
A local oscillator that constitutes a synthesizer, a radio unit that modulates and demodulates with a signal generated by the local oscillator, and a baseband signal generator that generates a baseband signal, wherein the radio unit transmits from the baseband signal generator during transmission A radio frequency is generated by modulating the generated baseband signal with a signal generated by a local oscillator, and a baseband signal is generated by demodulating the radio frequency with a signal generated by the local oscillator during reception.

A quasi-millimeter wave / millimeter wave band radio apparatus according to the present invention generates a high-frequency signal having extremely high frequency stability in a local oscillator based on a reference frequency generated by a reference frequency generator using GPS, The radio unit uses this signal to modulate the baseband signal to generate a radio frequency and to demodulate the received radio frequency to generate a baseband signal, so that the frequency is stable even in the quasi-millimeter wave band and the millimeter wave band. Therefore, it is possible to generate an excellent signal, and to minimize the frequency deviation of the device.

Further, a quasi-millimeter / millimeter wave band radio apparatus according to the present invention includes: a reference frequency generator using GPS;
A PLL circuit using a reference frequency generated by a reference frequency generator, a local oscillator constituting a synthesizer, a radio section for modulating and demodulating with a signal generated by the local oscillator, and an IF frequency signal generator for generating an IF frequency signal The radio unit generates a radio frequency by up-converting an IF frequency signal generated from an IF frequency signal generator by a signal generated by a local oscillator during transmission, and generates a radio frequency by a local oscillator during reception. The signal is down-converted to generate an IF frequency signal.

A quasi-millimeter wave / millimeter wave band radio apparatus according to the present invention generates a high-frequency signal having extremely high frequency stability in a local oscillator based on a reference frequency generated by a reference frequency generator using GPS, The radio unit uses this signal to up-convert the IF frequency signal to generate a radio frequency and to down-convert the radio frequency to generate an IF frequency signal, so that the frequency is stable even in the quasi-millimeter wave band and the millimeter wave band. Therefore, it is possible to generate an excellent signal, and to minimize the frequency deviation of the device.

Further, a quasi-millimeter / millimeter wave band radio apparatus according to the present invention comprises a terminal station apparatus and a base station apparatus each using a reference frequency generator using GPS.
The terminal station device has an incoming wave direction estimating unit that calculates an incoming wave direction and a distance of a radio wave of the base station device, and a base station position that estimates the position of the base station device based on data calculated by the incoming wave direction estimating unit. It has an estimator and a handover timing generator that analyzes the position information estimated by the base station position estimator to generate a handover timing signal, and feeds back the handover timing signal to the terminal station device.

A quasi-millimeter wave / millimeter wave band radio apparatus according to the present invention includes a terminal station apparatus and a base station apparatus each using a reference frequency generator using GPS, and the terminal station apparatus is transmitted from a base station. Based on a radio signal (radio wave) having a high frequency stability, the direction and distance of the radio wave from the base station device are calculated to estimate the position of the base station device, and the position information is analyzed to generate a handover timing signal. Then, it returns to the terminal station device, so that the handover can be executed smoothly.

Also, a highly stable reference frequency is generated using GPS, and this reference wave number is used for each base station device and terminal station device constituting the quasi-millimeter-wave / millimeter-wave band radio device, thereby enabling radio communication. Frequency deviation between devices or wireless devices can be minimized.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram of a main part of an embodiment of a quasi-millimeter wave / millimeter wave band radio apparatus according to the present invention. In FIG. 1, a quasi-millimeter wave / millimeter wave band wireless device uses a GPS, forms a synthesizer with a reference frequency generating device 101 that generates a reference frequency, and a PLL circuit, and uses the reference frequency in a radio unit 103. Local oscillator 10 for generating a signal having a reference frequency
2. A radio unit 1 comprising a modulator, a demodulator, etc., transmitting a radio signal and receiving a radio signal from another radio device.
03, including a baseband signal generator 104 for generating a baseband signal.

Next, the operation of the quasi-millimeter wave / millimeter wave band radio apparatus will be described with reference to FIG. A signal of a reference frequency generated from a reference frequency generator 101 using a GPS is input to a local oscillator 102, and the local oscillator 102 of a synthesizer configured with a PLL circuit locks the oscillation frequency to the reference frequency to reduce the frequency stability. Generates very high signals.

Modulation and demodulation are performed by the radio section 103 using a signal having high frequency stability locked to the reference frequency. As a transmission operation of the radio unit 103, the baseband signal generated from the baseband signal generator 104
After generating a radio frequency by performing modulation with a signal having high frequency stability, the radio signal is transmitted via an antenna (not shown). On the other hand, the receiving operation of the radio section 103 is as follows: after receiving a radio signal supplied from another radio apparatus through an antenna (not shown), demodulating the radio frequency of the radio signal with a signal having high frequency stability, Pand signal generator 1
04 generates a baseband signal.

As described above, the quasi-millimeter-wave / millimeter-wave band radio apparatus according to the present invention uses a high-frequency radio with extremely high frequency stability in the local oscillator 102 based on the reference frequency generated by the reference frequency generator 101 using GPS. The radio unit 103 uses this signal to modulate a baseband signal to generate a radio frequency and to demodulate a received radio frequency to generate a baseband signal. A signal having excellent frequency stability can be generated even in the millimeter wave band, and the frequency shift of the device can be suppressed to the minimum.

FIG. 2 is a block diagram showing a principal part of another embodiment of the quasi-millimeter / millimeter wave band radio apparatus according to the present invention. In FIG. 2, a quasi-millimeter wave / millimeter wave band wireless device includes a reference frequency generator 101 using a GPS, a local oscillator 10
2. The radio unit 103 includes an IF frequency signal generator 204 that generates an IF frequency signal. The configuration of FIG. 2 is different from the configuration of FIG. 1 only in that an IF frequency signal generator 204 is used instead of the baseband signal generator 104.

Next, the operation of the quasi-millimeter / millimeter wave band radio apparatus will be described with reference to FIG. 1 will be omitted, and the transmission / reception operation of the wireless unit 103 will be described. The transmission operation of the radio unit 103 is performed by adding the local oscillator 1 to the IF frequency signal generated by the IF frequency signal generator 204.
After up-converting the high frequency stability signal generated in step 02 to generate a radio frequency, the radio signal is transmitted via an antenna (not shown).

On the other hand, the receiving operation of the radio section 103 is as follows.
After receiving a radio signal supplied from another radio apparatus via an antenna (not shown), the radio frequency is down-converted with a signal having high frequency stability, and an IF frequency signal is generated by an IF frequency signal generator 204.

As described above, the quasi-millimeter wave / millimeter wave band radio apparatus according to the present invention uses the high frequency radio with extremely high frequency stability in the local oscillator 102 based on the reference frequency generated by the reference frequency generator 101 using GPS. The radio unit 103 uses this signal to up-convert the IF frequency signal to generate a radio frequency and to down-convert the radio frequency to generate an IF frequency signal. A signal having excellent frequency stability can be generated even in the millimeter wave band, and the frequency shift of the device can be suppressed to the minimum.

FIG. 3 is a block diagram of a main part of an embodiment in which the quasi-millimeter / millimeter wave band radio apparatus according to the present invention is applied to a terminal station apparatus and a base station apparatus. In FIG. 3, a reference frequency generator 301 using GPS is provided on the base station apparatus 302 side, and a reference frequency generator 303 using GPS is also provided on the terminal station apparatus 304 side. The reference frequency generators 301 and 303 are the same as those shown in FIG. 1 or FIG. Further, the base station device 302 and the terminal station device 3
04 is a local oscillator 102, a radio unit 103,
Baseband signal oscillator 104 or local oscillator 102 shown in FIG. 2, radio unit 103, IF frequency signal generator 2
04.

On the side of the terminal station device 304, the base station device 30
Arrival wave direction estimator 305 for calculating the direction and distance of arrival of the second radio wave, base station position estimator 306 for estimating the position of base station apparatus 302 based on data calculated by arrival wave direction estimator 305, base station A handover timing generator 307 that analyzes the position information estimated by the position estimator 306 and generates a handover timing signal is provided.

Next, the operation of detecting the position of the base station device 302 of the terminal station device 304 will be described with reference to FIG. When a radio signal with high frequency stability based on the reference frequency generated by the reference frequency generation device 301 using GPS is transmitted from the base station device 302, the terminal station device 30
4, after receiving the radio signal, the reference frequency generator 30
3 generates a baseband signal or an IF frequency signal by demodulating or down-converting a radio signal with a signal having a high frequency stability based on the reference frequency generated by the reference signal 3.

The arrival wave direction estimating unit 305
Based on the baseband signal or IF frequency signal supplied from the base station 04, the direction and distance of the incoming radio wave of the base station device 302 are calculated, and the calculated direction and distance data are provided to the base station position estimating unit 306.

The base station position estimating section 306 supplies the accurate position of the base station apparatus 302 from the direction and distance data provided by the incoming wave direction estimating section 305 to the handover timing generating section 307 as position information.

The handover timing generator 307
The location information supplied from the base station location estimating unit 306 is analyzed, and the handover timing signal is fed back to the terminal station device 304 to instruct the terminal station device 304 on the timing of the next handover.

As described above, the quasi-millimeter wave / millimeter wave band radio apparatus according to the present invention comprises the terminal station apparatus 304 and the base station apparatus 302 using the reference frequency generators 301 and 303 using GPS, respectively. The station device 304
Based on a radio signal (radio wave) with high frequency stability transmitted from the base station device 302, the direction and distance of arrival of radio waves of the base station device 302 are calculated to estimate the position of the base station device 302, and the position information Is analyzed and a handover timing signal is generated and fed back to the terminal station device 304. Therefore, the frequency deviation between the devices is suppressed to the minimum, and the base station device 3
02 can be accurately specified, and the handover can be performed smoothly.

[0028]

As described above, the quasi-millimeter-wave / millimeter-wave band radio apparatus of the present invention generates a reference frequency having high frequency stability by a reference frequency generator using GPS, and uses this reference frequency as an apparatus. (Base station device and terminal station device), it is possible to generate a signal having excellent frequency stability even in the quasi-millimeter wave band and the millimeter wave band, and to minimize the frequency deviation of the device. .

[Brief description of the drawings]

FIG. 1 is a block diagram of a main part of a quasi-millimeter wave / millimeter wave band radio apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a main part of another embodiment of the quasi-millimeter / millimeter wave band radio apparatus according to the present invention.

FIG. 3 is a block diagram of a main part of an embodiment in which the quasi-millimeter wave / millimeter wave band wireless device according to the present invention is applied to a terminal station device and a base station device.

FIG. 4 is a block diagram of a conventional wireless device.

[Explanation of symbols]

 101, 301, 303 Reference frequency shoe generator 102 Local oscillator 103 Radio section 104 Baseband signal generator 204 IF frequency signal generator 302 Base station apparatus 304 Terminal station apparatus 305 Arrival wave direction estimator 306 Base station position estimator 307 Handover Timing generator

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuji Murao 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside Matsushita Communication Industrial Co., Ltd. No.3-1, Matsushita Communication Industrial Co., Ltd. (72) Inventor Masayuki Fujise 3-4 Hikarinooka, Yokosuka City, Kanagawa Pref. Ministry of Posts and Telecommunications Research Laboratory Yokosuka Radio Communications Research Center 3-4 Ichikonooka F-Term in Yokosuka Radio Communication Research Center, Ministry of Posts and Telecommunications Research Institute 5J106 AA04 BB01 CC15 CC16 GG01 HH01 KK05 KK15 PP01 RR01 5K011 BA04 DA03 DA07 EA01 KA13 5K067 AA33 BB02 DD20 EJ39 EJ52 EJ39

Claims (3)

[Claims] 1. A reference frequency generator using a GPS, a PLL circuit using a reference frequency generated by the reference frequency generator, a local oscillator constituting a synthesizer, and a signal generated by the local oscillator. A quasi-millimeter-wave / millimeter-wave band radio device including a radio unit for demodulation and a baseband signal generator for generating a baseband signal, wherein the radio unit is generated from the baseband signal generator during transmission. And modulating the baseband signal with a signal generated by the local oscillator to generate a radio frequency, and demodulating the radio frequency with a signal generated by the local oscillator to generate a baseband signal during reception. Quasi-millimeter / millimeter-wave band wireless device. 2. A reference frequency generator using a GPS, a PLL circuit using a reference frequency generated by the reference frequency generator, a local oscillator constituting a synthesizer, and modulation and modulation by a signal generated by the local oscillator. A quasi-millimeter-wave / millimeter-wave band radio device comprising a radio unit for demodulation and an IF frequency signal generator for generating an IF frequency signal, wherein the radio unit is generated from the IF frequency signal generator during transmission. Radio frequency is generated by up-converting the generated IF frequency signal with a signal generated by the local oscillator, and down-converting the radio frequency with a signal generated by the local oscillator to generate an IF frequency signal during reception. Quasi-millimeter wave / millimeter wave band wireless device. 3. A quasi-millimeter wave / millimeter wave band radio apparatus comprising a terminal station apparatus and a base station apparatus each using a reference frequency generator using GPS, wherein the terminal station apparatus includes the base station apparatus An incoming wave direction estimating unit for calculating an incoming wave direction and a distance of an electric wave of the radio wave; a base station position estimating unit for estimating a position of the base station apparatus based on data calculated by the incoming wave direction estimating unit; A handover timing generator that analyzes the position information estimated by the position estimator and generates a handover timing signal;
The quasi-millimeter wave / millimeter wave band radio apparatus according to claim 1 or 2, wherein a handover timing signal is fed back to the terminal station apparatus.