JP3137010B2 - Mobile device position identification radio - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile unit position specifying wireless device for exchanging information wirelessly between a mobile unit equipped with a slave unit and a master unit in a mobile unit identification system. Things.

[0002]

2. Description of the Related Art As a conventional mobile object identification system, for example, a system described in Japanese Patent Application Laid-Open No. Hei 2-8770 is known. Hereinafter, a conventional method will be described with reference to the drawings.

FIG. 5 is a conceptual diagram of a conventional moving object identification system. The transponder 21 is attached to the moving body, and the interrogator 11
It sends out its own identification code in response to a question from.

The modulator 12 of the interrogator 11 uses the transmitter 1
3 is modulated with arbitrary transmission data, and the transmission antenna 1 is modulated.
4, the interrogation signal X is continuously emitted into the communication area.

When the transponder 21 enters the communication area,
The receiving antenna 24 detects the interrogation signal X, spreads the spectrum with the spread spectrum modulator 23 in accordance with its own identification code stored in the identification code memory 22, and retransmits it from the transmission antenna 25. The response signal Y from the transponder 21 is received by the receiving antenna 15, demodulated by the demodulator 16, selected from the identification codes stored in the memory table 17, and output to the output device 18.

[0006]

However, in the above configuration, when there are a plurality of master units and slave units, one-to-one communication between the master unit and the slave units may not be possible.

An object of the present invention is to provide a one-to-one communication between a master unit and a slave unit without affecting each other even when there are a plurality of master units and slave units.

[0008]

SUMMARY OF THE INVENTION In order to solve this problem, according to the present invention, a slave unit performs spread modulation by a code information signal from a base unit, and the base unit also transmits a code information signal by a spread modulation signal. It is what was constituted.

Thus, even if a plurality of master units exist, wireless data transmission without affecting each other becomes possible, and one-to-one communication between the master unit and the slave unit becomes possible.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention has a master unit and a slave unit, wherein the master unit has code information signal generating means for generating a code information signal, and First spread modulation signal generating means for generating a spread modulation signal using a signal, ASK modulation means for ASK modulating the spread modulation signal with the code information signal, and first transmission means for transmitting an output signal of the ASK modulation means A transmitting antenna, a first receiving antenna for receiving a signal from the handset, a despreading means for despreading the received signal from the handset using the spread modulated signal, Data demodulating means for demodulating received data from the output of the spread signal, wherein the slave unit receives a second reception antenna for receiving a signal from the master unit and ID data or information of the slave unit. Stored data record Means, a code information signal detecting means for detecting a received signal to detect a code information signal, and a second means for inputting the detected code information signal, generating a spread modulation signal, and modulating an output signal of the data storage means. And a second transmitting antenna for transmitting the output of the second spread modulation signal generating means. The slave unit modulates the data of the slave unit with the spread modulation signal using the code information signal specified by the master unit, so that the radio wave emitted by the slave unit cannot be received by the adjacent master unit, preventing interference. It has the action of:

According to a second aspect of the present invention, the code information signal detected by the code information signal detecting means of the slave unit is shifted and spread-modulated based on the ID data of the slave unit, and despread by the master unit. 2. The mobile unit position specifying wireless device according to claim 1, wherein the code information signal of the master unit is shifted and despread by the amount shifted by the slave unit. This has the effect that one-to-one communication can be performed between the master unit and the slave unit even when entering the communication area with the base unit.

According to a third aspect of the present invention, in the mobile unit position specifying radio according to the first aspect of the present invention, the spread modulation is performed at a frequency different from the transmission frequency of the master unit when the spread modulation is performed by the slave unit. Yes, by changing the frequency depending on the slave, interference between the masters is prevented, the radio waves emitted by the slaves cannot be received by the adjacent master, preventing interference, and the slaves simultaneously communicate with the master. This has the effect that one-to-one communication can be performed between the master unit and the slave unit even when entering the area.

According to a fourth aspect of the present invention, there is provided a master unit and a slave unit, wherein the master unit includes a high-frequency signal generating means for generating a high-frequency signal and a first pseudo-noise sequence signal for generating a first pseudo-noise sequence signal. Pseudo-noise sequence signal generating means, the high-frequency signal and the first
First mixing means for mixing the pseudo-noise sequence signal with the pseudo-noise sequence signal, code information signal generating means for generating a code information signal, and ASK output using the code information signal.
ASK modulating means for modulating, a first transmitting antenna for transmitting an output signal of the ASK modulating means, and a second transmitting antenna for generating a second pseudo noise sequence signal based on the code information signal.
A pseudo-noise sequence signal generating means, a first receiving antenna for receiving a signal from the slave unit, a local oscillator, and a second mixing the output of the first receiving antenna and the output of the local oscillator. 2 mixing means, a third mixing means for mixing the second pseudo noise sequence signal and the output of the second mixing means, and the code when the output of the third mixing means is input. The code information signal and the second pseudo-noise sequence signal are output to the information signal generating means and the second pseudo noise sequence signal generating means.
Communication decision control means for outputting a signal for controlling the output of each of the pseudo noise sequence signals, data demodulation means for demodulating when the output of the third mixing means is input, and A first signal switching unit that switches an output destination to one of the communication determination control unit and the data demodulation unit, wherein the slave unit receives a transmission signal of the master unit, Code information signal detection means for detecting a code information signal by detecting a received signal and determining whether or not the code information signal is specified by the master unit; and data storage means for storing data to be modulated. A third pseudo-noise sequence signal generating means for inputting the detected code information signal and the output of the data storage means to generate a third pseudo-noise sequence signal; Signal switching means for inputting the third pseudo-noise sequence signal and selecting and outputting one of the signals, a local oscillator, an output of the second signal switching means, and an output of the local oscillator. And a second transmitting antenna for transmitting the output of the fourth mixing means. By providing
Even if the slave unit erroneously receives the code information signal of the adjacent master unit, one-to-one communication can be performed between the desired master unit and slave unit.

According to a fifth aspect of the present invention, there is provided a master unit and a slave unit, wherein the master unit includes a code information signal generating means for generating a code information signal, and a spread modulation signal using the code information signal. First spread modulation signal generating means for generating the spread modulation signal, ASK modulation means for performing ASK modulation with the code information signal when the spread modulation signal is input, and passing only the spread modulation signal, or ASK signal
A changeover switch for selecting whether to pass through by modulating,
A first transmitting antenna for transmitting an output signal of the changeover switch, a first receiving antenna for receiving a signal from the handset, and despreading a received signal from the handset using the spread modulated signal; Despreading means, and data demodulation means for demodulating received data from the output of the signal despread by the despreading means, wherein the slave unit receives a signal from the master unit. A receiving antenna and I
D data or data storage means for storing information, code information signal detection means for detecting a received signal to detect a code information signal, and inputting the detected code information signal, generating a spread modulation signal, A second spread modulation signal generating means for modulating an output signal of the data storage means; and a second transmitting antenna for transmitting an output of the second spread modulation signal generating means. This is a wireless device for wireless communication.The slave unit does not have a transmitting means such as a local oscillator, but modulates the radio wave of the master unit according to the data stored in the data storage unit of the slave unit, and uses the reflected radio wave to operate the slave unit. This has the effect of simplifying the circuit.

The invention according to claim 6 has a master unit and a slave unit, wherein the master unit has a high-frequency signal generating means for generating a high-frequency signal, and a first pseudo-noise sequence signal for generating a first pseudo-noise sequence signal. Pseudo-noise sequence signal generating means, first mixing means for mixing the high-frequency signal and the first pseudo-noise sequence signal, code information signal generating means for generating a code information signal, and first mixing means ASK modulation means for ASK-modulating with the code information signal when the output of (1) is input, and whether to pass only the first mixing means or to pass the output of the first mixing means after ASK modulation , A transmission antenna for transmitting an output signal of the first switch, and a second antenna for generating a second pseudo-noise sequence signal based on the code information signal.
Pseudo-noise sequence signal generating means, a receiving antenna for receiving a signal from the slave unit, second mixing means for mixing the second pseudo-noise sequence signal and the high-frequency signal, and an output of the receiving antenna Third mixing means for mixing the output of the second mixing means with the code information signal generating means and the second pseudo noise sequence signal generation when the output of the third mixing means is input. Communication determination control means for outputting a signal for controlling the output of each of the code information signal and the second pseudo noise sequence signal to the means; and demodulation when the output of the third mixing means is input. Data demodulation means, and second signal switching means for switching an output destination of the third mixing means to either the communication determination control means or the data demodulation means, wherein the slave unit is connected to the master unit. versus An antenna for a slave unit that transmits or receives a signal, a third signal switching unit that switches between reception of a signal from the master unit and transmission of a modulation signal from the slave unit, and a signal from the third signal switching unit. Code information signal detection means for detecting a code information signal when is input, data storage means storing data to be modulated, and input the detected code information signal and the output of the data storage means, A third pseudo-noise sequence signal generating means for generating a third pseudo-noise sequence signal, a fourth pseudo-noise sequence signal for inputting the detected code information signal and the third pseudo-noise sequence signal, and selecting and outputting one of them. Signal switching means;
The output of the fourth signal switching means is modulated to produce the third signal.
And a modulating means for outputting the signal to the signal switching means. Modulation is performed according to the data stored in the data storage means, and the circuit of the slave unit is simplified by using the reflected radio waves. It has the effect of exchanging data.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. (Embodiment 1) FIG. 1 is a block diagram showing a main part of a mobile unit position specifying radio.

In FIG. 1, reference numeral 100 denotes a master unit, 101 denotes first spread modulation signal generation means, 102 denotes ASK modulation means,
103 is a first transmitting antenna, 104 is a code information signal generating means, 105 is a first receiving antenna, 106 is a despreading means, 107 is a data demodulating means, 200 is a slave unit, 20
1 is a second receiving antenna, 202 is a code information signal detecting means, 203 is a second spread modulated signal generating means, 204 is a data storage means, and 205 is a second transmitting antenna.

In base unit 100, first spread modulation signal generating means 101 generates a spread modulation signal using the code information signal generated by code information signal generating means 104. The generated signal is output to a code information signal generation unit 104.
ASK modulation means 102 uses the signal generated in
The signal is K-modulated, and the signal is transmitted from the first transmitting antenna 103.

When the slave 200 enters the communication area of the master 100, the signal transmitted by the master 100 is received by the second receiving antenna 201 in the slave, and the code information detecting means 202 detects the signal of the master 100. The code information signal of the designated spread modulation signal is detected. Slave device 200 has data storage means 20
When transmitting the information of the slave 4 to the master unit 100, the information of the slave unit 200 is modulated with a spread modulation signal based on the specified code information signal, and transmitted from the second transmitting antenna 205.

In base unit 100, a signal from handset 200 is received by first receiving antenna 105, and despreading means 106 despreads the spread modulated signal of handset 200. At this time, a spread modulation signal is generated based on the same code information signal as the code information signal transmitted to the slave 200, despread, and output to the data demodulation means 508.

As described above, when a spread modulation signal is used in the master unit, even when a plurality of master units are installed adjacent to each other,
By making the spread modulation signals different between the master units, interference between the master units can be prevented. Further, the slave unit performs spread modulation based on the code information signal specified by the master unit and transmits a signal to the master unit. When the master unit receives a signal from the slave unit, the spread modulation signal used by the slave unit is transmitted. Since the master unit is known, it can be despread by the designated spread modulation signal.

Also, since the signal of the slave unit is different from the spread modulation signal in the other master units, the signal from the slave unit is spread as noise by despreading. Therefore, there is no influence of interference on other master units, and information can be exchanged between a specific slave unit and the master unit.

When a spread modulation signal is generated in the slave unit 200, it is based on only the code information signal in the above description.
The code information signal detected by the code information signal detection means 202 may be shifted based on the ID data stored in the data storage means 204 of the slave 200 to generate a spread modulation signal. In this case, in the base unit 100, the base unit 1
The code information signal of 00 is shifted and despread.
In this way, by using the ID data of the slave unit, even when there are a plurality of slave units in the communication area of the master unit, the master unit can communicate with one of the slave units, and the communication from the other slave unit can be performed. The signal is spread at the time of despreading and becomes noise, and there is no influence of interference from other slave units, and information can be exchanged between a specific slave unit and the master unit.

In the slave 200, the frequency of the spread modulation signal may be changed according to the ID data of the slave 200. In this case, base unit 100 changes the frequency of the spread modulation signal so that the frequency becomes the same. In this way, by changing the frequency from the slave unit for each slave unit, communication with only a specific slave unit can be realized even when a plurality of slave units are simultaneously present in the communication area with the master unit. .

(Embodiment 2) FIG. 2 is a block diagram of a main part of a mobile unit position specifying radio.

In FIG. 2, reference numeral 300 denotes a master unit, 301 denotes high-frequency signal generation means, 302 denotes a first pseudo noise sequence signal generation means, 303 denotes a first mixer, 304 denotes an ASK modulation means, and 305 denotes a first ASK modulation means. 1 is a transmitting antenna, 306 is a code information signal generating means, 307 is a second pseudo noise sequence signal generating means, 308 is a first receiving antenna, 309 is a first local oscillator, 310 is a second mixer, 311 is a third mixer, 312 is a communication determination control unit, 313 is a first switch, 314 is a data demodulation unit, 400 is a slave unit,
401 is a second receiving antenna, 402 is a code information signal detecting means, 403 is a third pseudo noise sequence signal generating means,
404 is a data storage means, 405 is a second switch, 406 is a fourth mixer, 407 is a second local oscillator, and 408 is a second transmitting antenna.

In master unit 300, a signal generated from high-frequency signal generating means 301 and an output signal from first pseudo noise sequence signal generating means 302 are mixed by first mixer 303 to generate a spread modulated signal. Let it. At this time, the output signal of the first pseudo-noise sequence signal generating means 302 is a pseudo-noise sequence signal of a different sequence from that of the adjacent parent device, or a pseudo-noise sequence signal obtained by shifting the pseudo-noise sequence signal of the same sequence by one bit or more. It is. Code information signal generating means 30
6 and the output of the first mixer 303 are modulated by ASK modulation means 304, and the first transmission antenna 305
Send from.

When the slave 400 enters the communication area of the master 300, the signal transmitted by the master 300 is received by the second receiving antenna 401 in the slave, and the code information signal detecting means 402 detects the signal. Detects the code information signal specified by. When the code information signal from the master unit is detected, in the slave unit 400, the second changeover switch 405 connects the code information signal detection unit 402 and the fourth mixer 406, and the detected signal is connected to the second local unit. The signal of the transmitter 407 is mixed with the signal of the fourth mixer 406 to form the second transmitting antenna 4
08 to the parent device 300.

In base unit 300, a signal from handset 400 is received by first receiving antenna 308, and the received signal is synchronized with base unit 30 synchronized with second local oscillator 407 of handset 400.
0 of the first local oscillator 309 and the output of the second mixer 3
Mix at 10. The signal is sent to a third mixer 311,
After passing through the first changeover switch 313, the communication determination control unit 312 determines whether the received code information signal from the child device 400 is the same as that output from the parent device 300. If not the same, master device 300 continues to transmit the code information signal. In the same case, the communication determination control means 312 sends a control signal to the code information signal generation means 306 so as to cut off the output to the ASK modulation means 304 so that only the spread modulation signal from the first transmission antenna 305 is transmitted. And the second pseudo noise sequence signal generating means 307 includes the code information signal generating means 30
6 to generate a pseudo-noise sequence signal based on the signal No. 6 and a first switch 313
Is switched to the data demodulation means 314 side.

When the handset 400 detects that the received signal is only a spread modulation signal by the code information signal detection means 402, the second changeover switch 405 is set to the third pseudo noise sequence signal generation means 403 side. Switch. Slave unit 4
When transmitting data of 00, the third pseudo-noise sequence signal generating means 403 generates a pseudo-noise sequence signal for the code detected by the code information signal detecting means 402 using the data of the data storage means 404. The signal
, And is mixed with the output of the second local oscillator 407 by the fourth mixer 406 and transmitted.

In base unit 300, first receiving antenna 30
9 is mixed with the output of the first local oscillator by the second mixer 310, and the output of the second mixer 310 and the pseudo noise sequence of the second pseudo noise sequence signal generating means 307 are mixed. The signal is mixed by the third mixer 311 with the
00 can be despread. The despread signal is demodulated by the data demodulation means 314 via the first changeover switch 313 into a data signal of the slave unit.

The base unit performs spread modulation with a spread modulation signal, and the slave unit performs spread modulation with a spread modulation signal designated by the base unit. By providing communication determination control means in the base unit, interference between the base units is prevented. Since the signal is not received as a signal from the correct partner at the adjacent master, even if the slave incorrectly receives the code information signal of the adjacent master, the master does not receive the signal of the slave,
As a result, one-to-one communication of information between the desired parent device and child device can be realized.

(Embodiment 3) FIG. 3 is a block diagram of a main part of a mobile unit position specifying radio.

In FIG. 3, reference numeral 500 denotes a master unit, 501 denotes first spread modulation signal generation means, 502 denotes ASK modulation means,
503 is a changeover switch, 504 is a first transmitting antenna, 505 is a code information signal generating means, 506 is a first receiving antenna, 507 is a despreading means, 508 is a data demodulating means, 600 is a slave, and 601 is a second handset. Receiving antenna,
602 is a code information signal detecting means, 603 is a second spread modulated signal generating means, 604 is a data storage means, and 605 is a second transmitting antenna.

In the parent machine 500, the first
The spread modulation signal generation means 501 generates a spread modulation signal using the code information signal generated by the code information signal generation means 505. The generated signal is ASK-modulated by ASK modulating means 502 using the signal generated by code information signal generating means 505, and the signal is transmitted from first transmitting antenna 504.

Further, in order to read a signal from slave unit 600, master unit 500 switches changeover switch 503 during the next certain period so that only the spread modulation signal is transmitted from first transmitting antenna 504. I do.

When slave unit 600 enters the communication area of master unit 500, a signal having the code information signal transmitted by master unit 100 is transmitted to second reception antenna 601 in slave unit 600.
The code information detecting means 602 detects the code information signal of the spread modulation signal designated by the base unit 500, and determines which code should generate the spread modulation signal. Slave device 600 stores information held in data storage means 604 in master device 5.
In the case of transmission at 00, when only the spread modulation signal is transmitted from master device 500, the information of slave device 600 is modulated with the spread modulation signal based on the specified code information signal, and the second transmission is performed. The antenna 605 transmits the signal output from the base unit 500 to the base unit 500 by reflecting the signal at the same frequency.

In base unit 500, a signal from handset 600 is received by first receiving antenna 506, and a despreading means 507 despreads the spread modulated signal of handset 600. At this time, a spread modulation signal is generated based on the same code information signal as the code information signal transmitted to slave device 600, despread, and output to data demodulation means 508.

As described above, by using the spread modulation signal in the master unit, even when a plurality of master units are installed adjacent to each other,
By making the spread modulation signals different between the master units, interference between the master units can be prevented. Further, the slave unit performs spread modulation based on the code information signal specified by the master unit and transmits a signal to the master unit. When the master unit receives a signal from the slave unit, the spread modulation signal used by the slave unit is transmitted. Since the master unit is known, it can be despread by the designated spread modulation signal.

Since the signal of the slave unit is different from the spread modulation signal in the other master units, the signal from the slave unit is spread as noise by despreading. As a result, there is no interference with other master units, information can be exchanged with a specific slave unit and the master unit, and by using the reflected radio waves of the master unit, the slave unit does not need to have a transmitter. In addition, the circuit configuration is simplified and downsizing can be realized.

(Embodiment 4) FIG. 4 is a block diagram of a main part of a mobile unit position specifying radio.

In FIG. 4, 700 is a master unit, 701 is high-frequency signal generation means, 702 is first pseudo noise sequence signal generation means, 703 is first mixer, 704 is ASK modulation means, 705 is transmission antenna, 706 is a code information signal generating means, 707 is a first changeover switch, 708 is a second pseudo noise sequence signal generating means, 709 is a receiving antenna, 710 is a second mixer, 711 is a third mixer,
12 is a communication determination control unit, 713 is a second changeover switch, 714 is a data demodulation unit, 800 is a slave unit, 801
Is a slave unit antenna, 802 is a code information signal detecting means,
803 is a third pseudo noise sequence signal generating means, 804 is a data storage means, 805 is a third switch, 80
Reference numeral 6 denotes a fourth changeover switch, and reference numeral 807 denotes a modulation unit.

In master unit 700, the signal generated from high-frequency signal generation means 701 and the output signal of first pseudo noise sequence signal generation means 702 are mixed by first mixer 703 for a certain period of time. Generate a spread modulation signal. At this time, the output signal of the first pseudo-noise sequence signal generating means 702 is a pseudo-noise sequence signal of a different sequence from that of the adjacent master unit, or a pseudo-noise sequence signal obtained by shifting the pseudo-noise sequence signal of the same sequence by one bit or more. It is. The code information signal from the code information signal generation means 706 and the output of the first mixer 703 are modulated by the ASK modulation means 704 and transmitted from the transmission antenna 705.

Further, in order to read a signal from slave unit 800, master unit 700 switches first changeover switch 707 during the next certain period, does not transmit a code information signal, and outputs a first pseudo noise sequence. The output of the signal generation means 702 is turned off, and only the unmodulated high-frequency signal is transmitted from the transmission antenna 705.

When slave unit 800 enters the communication area of master unit 700, the signal transmitted by master unit 700 is received by slave unit antenna 801 in slave unit 800, and code information signal detecting means 802 detects the signal transmitted by master unit 700. Detects the code information signal specified by. When a code information signal from the master unit is detected,
In the slave unit 800, the third switch 805 connects the code information signal detection unit 802 and the modulation unit 807,
The fourth changeover switch connects the modulation means 807 and the slave unit antenna 801. Thus, the detected signal is modulated by the modulation unit 807 and transmitted from the slave unit antenna 801 to the master unit 700. When the detected signal is only an unmodulated high-frequency signal, the third switch 806 connects the third pseudo-noise sequence signal generating means to the modulating means 807, and the fourth switch is connected to the modulating means 807. The antenna 801 is connected. Then, the pseudo noise sequence signal generating means 803 is provided with a code information signal detecting means 802.
The pseudo-noise sequence signal corresponding to the output of
The signal is generated using the data of No. 04, and the signal is modulated by the modulation means 807 via the third switch 805, and transmitted from the slave unit antenna 801 to the master unit 700.

In master unit 700, a signal from slave unit 800 is received by receiving antenna 709, and the received signal is passed through third mixer 711 and second changeover switch 713, and communication determination control means 712 Then, it is determined whether or not the received code information signal from child device 800 is the same as that output from the parent device.

If not the same, master device 700 continues to transmit the code information signal. In the same case, the communication determination control means 712 sends a control signal to the code information signal generation means 706 so as to cut off the output to the ASK modulation means 704, and furthermore, the second pseudo noise sequence signal generation means 70
8, a control signal is transmitted to generate the same spread modulation signal as that of the slave unit 800 based on the signal of the code information signal generation means 706.
Switch to the data demodulation means 714 side. The signal from the second pseudo noise sequence signal generating means 708 is supplied to the second mixer 7
10 mixes with the output of the high frequency signal generation means 701. By mixing the mixed output and the received signal from slave unit 800 by third mixer 711, slave unit 80
The spread modulation signal of 0 can be despread, and is input to the data demodulation means 714 via the second changeover switch 713, and the data signal of the slave 800 is demodulated.

As described above, when the spread modulation signal is used in the base unit, even when a plurality of base units are installed adjacent to each other,
By making the spread modulation signals different between the master units, interference between the master units can be prevented. Further, the slave unit performs spread modulation based on the code information signal specified by the master unit and transmits a signal to the master unit. When the master unit receives a signal from the slave unit, the spread modulation signal used by the slave unit is transmitted. Since the master unit is known, it can be despread by the designated spread modulation signal.

Also, since the signal of the slave unit is different from the spread modulation signal in the other master units, the signal from the slave unit is spread as noise by despreading. As a result, there is no interference with other master units, information can be exchanged with a specific slave unit and the master unit, and by using the reflected radio waves of the master unit, the slave unit does not need to have a transmitter. In addition, the circuit configuration is simplified and downsizing can be realized. Also, by providing the communication determination control means, the signal of the slave unit is not received by the adjacent master unit as a signal from a correct partner, so that even if the slave unit erroneously receives the code information signal of the adjacent master unit, the master unit does not receive the signal. The handset does not receive the signal of the handset, and as a result, one-to-one communication of information between the desired master and handset can be realized.

[0050]

As described above, according to the present invention, a base station uses a spread modulation signal in a mobile unit position specifying radio which performs radio communication between a base station and a child station at a short distance. For,
Even if there are multiple master units, wireless data transmission is possible without affecting each other, and the slave units can also perform spread modulation using the code information signal specified by the master unit and the data held by the slave units, and Advantageous effect that one-to-one communication between the terminal and the slave unit is enabled.

[Brief description of the drawings]

FIG. 1 is a block diagram of a main part of a mobile object position specifying wireless device according to an embodiment of the present invention;

FIG. 2 is a block diagram of a main part of a moving object position specifying wireless device according to an embodiment of the present invention;

FIG. 3 is a block diagram of a main part of a moving object position specifying wireless device according to an embodiment of the present invention;

FIG. 4 is a block diagram of a main part of a mobile object position specifying wireless device according to an embodiment of the present invention;

FIG. 5 is a conceptual diagram of a conventional moving object identification system.

[Explanation of symbols]

 Reference Signs List 101 first spread modulated signal generating means 102 ASK modulating means 104 code information signal generating means 106 despreading means 202 code information signal detecting means 203 second spread modulated signal generating means 301 high frequency signal generating means 302 first pseudo noise sequence Signal generation means 304 ASK modulation means 306 Code information signal generation means 307 Second pseudo noise sequence signal generation means 309 First local oscillator 312 Communication decision control means 313 First changeover switch 402 Code information signal detection means 403 Third Pseudo-noise sequence signal generation means 405 Second changeover switch 407 Second local oscillator 501 First spread modulation signal generation means 502 ASK modulation means 503 Changeover switch 505 Code information signal generation means 507 Despreading means 602 Code information signal Detecting means 6 3 Second spread modulated signal generating means 701 High frequency signal generating means 702 First pseudo noise sequence signal generating means 704 ASK modulating means 706 Code information signal generating means 707 First switch 708 Second pseudo noise sequence signal generating means 712 communication determination control means 713 second changeover switch 802 code information signal detection means 803 third pseudo noise sequence signal generation means 805 third changeover switch 806 fourth changeover switch 807 modulation means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-181253 (JP, A) JP-A-6-188857 (JP, A) JP-A-5-137176 (JP, A) 297131 (JP, A) JP-A-6-30836 (JP, A) JP-A-7-84040 (JP, A) JP-A-8-21874 (JP, A) JP-A 8-327730 (JP, A) JP-A-9-289484 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04J 13/00-13/06 H04B 7/24-7/26 102 H04Q 7/00-7 / 38 G01S 7/00-7/46 G01S 13/00-13/95

Claims (6)

(57) [Claims] An information processing apparatus comprising: a master unit and a slave unit, wherein the master unit generates a code information signal and generates a spread modulation signal using the code information signal. Modulating signal generating means; ASK modulating means for ASK modulating the spread modulation signal with the code information signal;
A first transmitting antenna for transmitting an output signal of the SK modulation unit, a first receiving antenna for receiving a signal from the slave, and despreading a received signal from the slave using the spread modulated signal; Despreading means; and data demodulation means for demodulating received data from the output of the signal despread by the despreading means, wherein the slave unit is a second receiving antenna for receiving a signal from the master unit. And data storage means for storing ID data or information of the slave unit, code information signal detection means for detecting a received signal to detect a code information signal, and inputting the detected code information signal to spread modulation. A second spread modulation signal generating means for generating a signal and modulating an output signal of the data storage means; and a second transmitting antenna for transmitting an output of the second spread modulation signal generating means. Toss Mobile localizing radio. 2. The code information signal detected by the code information signal detection means of the slave unit is shifted and spread-modulated based on the ID data of the slave unit, and the slave unit shifts when despreading in the master unit. 2. The wireless device according to claim 1, wherein the code information signal of the master unit is shifted and despread by a corresponding amount. 3. The mobile unit position specifying wireless device according to claim 1, wherein, when spread modulation is performed by the slave device, spread modulation is performed at a frequency different from a transmission frequency of the master device. 4. A master unit and a slave unit, wherein the master unit generates a high-frequency signal and a first pseudo-noise sequence signal generating unit that generates a first pseudo-noise sequence signal. First mixing means for mixing the high-frequency signal and the first pseudo-noise sequence signal; code information signal generating means for generating a code information signal; and output of the first mixing means to the code information. ASK modulation means for performing ASK modulation with a signal, a first transmission antenna for transmitting an output signal of the ASK modulation means, and a second pseudo noise sequence for generating a second pseudo noise sequence signal based on the code information signal A signal generating means, a first receiving antenna for receiving a signal from the slave unit, a first local oscillator, and mixing the output of the first receiving antenna and the output of the first local oscillator. Second
Mixing means, the second pseudo noise sequence signal and the second
A third mixing means for mixing the output of the third mixing means with the output of the third mixing means, and a code information signal generating means and a second pseudo noise sequence signal generating means when the output of the third mixing means is input. Communication determination control means for outputting a signal for controlling the output of each of the code information signal and the second pseudo noise sequence signal; and data demodulation means for demodulating when an output of the third mixing means is input. A first signal switching unit for switching an output destination of the third mixing unit to either the communication determination control unit or the data demodulation unit, wherein the slave unit receives a transmission signal of the master unit. A second receiving antenna, a code information signal detecting means for detecting a received signal to detect a code information signal and determining whether or not the code information signal is specified by the master unit; A data storage means for storing over data, enter the output of the code information signal and the data storage means is detected, a third for generating a third pseudo-noise sequence signals
Pseudo-noise sequence signal generation means, second signal switching means for inputting the detected code information signal and the third pseudo-noise sequence signal, selecting and outputting one of them, and a second local oscillator And fourth mixing means for mixing the output of the second signal switching means and the output of the second local oscillator, and a second transmitting antenna for transmitting the output of the fourth mixing means. A wireless device for specifying a position of a moving object, comprising: 5. A base unit having a master unit and a slave unit, wherein the master unit generates a code information signal and generates a spread modulation signal by using the code information signal. Modulation signal generating means, ASK modulation means for ASK-modulating the code information signal when the spread modulation signal is input, and passing only the spread modulation signal, or passing the spread modulation signal by ASK modulation A changeover switch for selecting whether to make the switch, a first transmission antenna for transmitting an output signal of the changeover switch, a first reception antenna for receiving a signal from the slave, and a reception signal from the slave. Despreading means for despreading using a spread modulation signal, and data demodulation means for demodulating received data from the output of the signal despread by the despreading means, A second receiving antenna for receiving a signal from the parent device, data storage means for storing ID data or information of the child device, and code information signal detection for detecting the received signal and detecting the code information signal Means for inputting the detected code information signal, generating a spread modulation signal, modulating an output signal of the data storage means, and an output of the second spread modulation signal generation means. And a second transmitting antenna for transmitting a mobile station. 6. A high-frequency signal generating means for generating a high-frequency signal, and a first pseudo-noise sequence signal generating means for generating a first pseudo-noise sequence signal. And first mixing means for mixing the high-frequency signal and the first pseudo-noise sequence signal, code information signal generating means for generating a code information signal, and an output of the first mixing means. ASK modulation means for ASK modulation with the code information signal, and a first means for selecting whether to pass only the first mixing means or to allow the output of the first mixing means to pass through the ASK modulation. A changeover switch, a transmitting antenna for transmitting an output signal of the first changeover switch, second pseudo noise sequence signal generating means for generating a second pseudo noise sequence signal based on the code information signal, Machine A receiving antenna for receiving a signal from the second antenna, a second mixing means for mixing the second pseudo-noise sequence signal and the high-frequency signal, and mixing an output of the receiving antenna with an output of the second mixing means. A third mixing unit that performs the code information signal generation and the second pseudo noise sequence signal generation when the output of the third mixing unit is input. Communication decision control means for outputting a signal for controlling the output of each of the pseudo noise sequence signals, data demodulation means for demodulating when the output of the third mixing means is input, and A second signal switching unit for switching an output destination to either the communication determination control unit or the data demodulation unit, wherein the slave unit transmits or receives a signal to or from the master unit. And a third signal switching unit for switching between reception of a signal from the master unit and transmission of a modulation signal from the slave unit, and a code information signal when a signal is input from the third signal switching unit. A code information signal detecting means for detecting, a data storing means for storing data to be modulated, and a detected code information signal and an output of the data storing means,
Third pseudo-noise sequence signal generating means for generating a pseudo-noise sequence signal, and the detected code information signal and the third pseudo-noise sequence signal.
Signal switching means for inputting the pseudo-noise sequence signal, selecting one of the signals and outputting the selected signal, and modulating means for modulating the output of the fourth signal switching means and outputting the modulated signal to the third signal switching means. And a wireless device for specifying the position of a moving object.