JPH08167883A - Device separate arranged tdma type transmitter-receiver having pilot signal fast detection part - Google Patents

Abstract

PURPOSE: To shorten the time needed for transmission of a pilot carrier through the start of control by detecting a pilot signal at a high speed. CONSTITUTION: A 1st transmitter-receiver device 100 includes a main signal burst generation part 101, a pilot signal generation part 102, a synthesization part 3 and a received signal demodulation part 104. A 2nd transmitter-receiver device 200 includes a separation part 15, a transmission high frequency part 25, a reception high frequency part 28, a pilot signal detection part 202 and a remote control part 203. In such a constitution of a device separate arranged TDMA time division multiplexing access type transmitter-receiver, the part 202 functions to fast detect a pilot signal that is separated at the part 15.

Description

Detailed Description of the Invention

(Table of Contents) Industrial Application Field of the Prior Art (FIGS. 6 to 8) Problem to be Solved by the Invention Means for Solving the Problem (FIG. 1) Action (FIG. 1) Example 1st Embodiment Description of Example (FIG. 2) • Description of Second Embodiment (FIGS. 3 to 5)

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device-separated type TDMA type transmitter / receiver consisting of two devices such as an indoor unit and an outdoor unit which are arranged at mutually distant positions. In recent years, mobile communication systems and satellite communication systems are increasingly using a method of installing and operating a wireless device outdoors.

Further, the communication system of these systems is TDM.
In many cases, the A (time division multiple access) method is used. In this case, there is a demand for remote control of a wireless device located outdoors in units of transmitted burst signals. Here, remote control of the wireless device means ON / OFF (ON / OFF) of the transmission amplifier.
OFF) control and control for self-diagnosis by returning to the RF (radio frequency) band and the IF (intermediate frequency) band.

In order to simplify the installation, the connection between the outdoor wireless device and the indoor device is made by using a coaxial cable or an optical cable for transmitting the main signal for both transmission and reception, or one transmission and reception. . That is, it does not have a cable connection for control. For this reason, the auxiliary signal for control (pilot signal) is transmitted to the wireless device through the transmission cable. However, in order to control the wireless device for each burst, an instruction from the indoor device is issued within the guard time between bursts. Must be received and the constituent circuits of the wireless device must be operated.

Therefore, a relatively low-speed system such as FM modulation cannot be used as a transmission system of the auxiliary signal, and it is carried out by turning on / off a plurality of carriers (that is, a multi-carrier pilot burst). The carrier is selected to have a frequency sufficiently lower than the intermediate frequency band (IF band). By the way, in order to ensure the control operation of the wireless device, the pilot burst is detected at high speed, and the state of the wireless device is changed to the state in accordance with the command before the main signal burst of interest is input to the wireless device. There is a need to.

Here, it is the detection time of the pilot signal that occupies a high proportion of the time from the input of the pilot burst to the establishment of the state of the wireless device. Therefore, how fast the pilot signal is detected is important. Has become a problem.

[0007]

2. Description of the Related Art FIG. 6 is a block diagram showing a conventional example. As shown in FIG. 6, this transmission / reception apparatus has an indoor unit 100 as a first transmission / reception apparatus and a second transmission / reception apparatus. The outdoor device 200 is provided separately from the outdoor device (wireless device) 200.
00 is connected via transmission lines 13 and 31 to the indoor unit 100 at a distance. In the outdoor device 200, the indoor device 10
The pilot signal from 0 remotely controls the on / off of the transmission amplifier and the self-diagnosis by the return in the RF band and the IF band.

The indoor unit 100 has a transmitting system and a receiving system. The transmitting system of the indoor unit 100 includes a main signal burst generating section 101 and a pilot signal generating section 10.
2, a synthesizing unit 3 is provided, and a reception signal demodulating unit 104 is provided in the receiving system of the indoor device 100. Further, the outdoor device 200 also has a transmission system and a reception system, and the transmission system of the outdoor device 200 includes a separation unit 15,
Band pass filter 35, return switch 2 for self-diagnosis
4, the transmission high frequency unit 25 is provided, and the outdoor device 20
The receiving system at 0 is provided with a receiving high frequency unit 28 and a self-diagnosis return switching unit 29. Further, the outdoor device 200 is provided with a pilot signal detection unit 201 and a logic control unit 23 as a remote control unit. Further, the outdoor device 200 is provided with a hybrid 26 and a transmitting / receiving antenna 27.

Here, the main signal burst generator 101 in the indoor unit 100 includes a TDMA controller 1 and a modulator 2.
(There may be more than one modulator 2),
By the TDMA control unit 1 and the modulation unit 2, the TD
It is possible to generate a modulated main signal burst according to the MA method. Pilot signal generator 1
Reference numeral 02 denotes a pilot burst signal (auxiliary signal) for remotely controlling the outdoor device 200. For this reason, for example, an oscillator 4-1 that outputs carriers having oscillation frequencies f ₀ , f ₁ , and f ₂ is used. ~ 4-3 and oscillators 4-1 to 4
High frequency switches 7-1 to 7-3 for turning on / off each carrier output from -3, a combiner 10 for synthesizing signals passed through the high frequency switches 7-1 to 7-3, and a high frequency switch 7-
The pilot burst control unit 11 is provided to control ON / OFF of 1 to 7-3 and generate a signal of a pattern according to a member of the outdoor device 200 that is remotely controlled.

The synthesizing unit 3 synthesizes the main signal burst and the pilot burst signal. The reception signal demodulation unit 104 includes a demodulation unit 33 (there may be a plurality of demodulators 33) and a TDMA control unit 34. The demodulation unit 33 and the TDMA control unit 34 perform the TDMA method on the received signal. The modulation processing conforming to is applied.

Further, the separating unit 1 in the outdoor unit 200
5 is for separating the main signal burst and the pilot burst signal from the signal sent from the indoor device 100. The band-pass filter 35 filters only the main signal, and the self-diagnosis folding switch 24 cooperates with the self-diagnosis folding switch 29 to receive the main signal from the transmitting side during the self-diagnosis. It turns back to the side.
In the normal state, the self-diagnosis loopback switching unit 24 is switched so as to send the main signal to the transmission high frequency unit 25 side.

The transmission high frequency section 25 converts the frequency of the main signal burst separated by the separation section 15 and passed through the bandpass filter 35 by the up converter 25-1 and further amplifies by the amplifier (high power amplifier) 25-2. Is. In addition, the transmission high-frequency unit 25 is used for
5-3 and a band pass filter 25-4.
Further, the reception high-frequency unit 28 performs frequency conversion on the reception signal, and for this purpose, the bandpass filter 28-
1, amplifier (low noise amplifier) 28-2, 28-3,
It has a down converter 28-4.

The self-diagnosis return switch 29 is used for self-diagnosis.
When disconnected, cooperates with self-diagnosis loopback switch 24
Then, the main signal is returned from the transmitting side to the receiving side.
It In the normal state, the self-diagnosis return switching device 29 is
It switches to pass the received signal. Pilot letter
The signal detection unit 201 is the pilot separated by the separation unit 15.
Burst signal (for remote control of the wireless device 200)
Auxiliary signal due to multi-carrier burst)
However, for this purpose, the distributor 16 and the distributor 16
Filter the pilot burst signal (voltage signal) that has been received
The center frequency₀, F ₁, F₂Band passfill
17-1 to 17-3 and bandpass filter 17-1
Power detection of each pilot signal from the output of 17-3
The power detectors 20-1 to 20-3 are provided.

The logic control section 23 controls the inside of the outdoor unit 200 (for example, on / off control of the amplifier 25-2 and self-control) based on each pilot signal information (total of 3 bits of information) detected by the pilot signal detection section 201. The switching control of the diagnostic return switch 24, 29 is performed. In FIG. 6, reference numerals 12 and 30 denote electric / optical converters, and 14 and 32 denote optical / electrical converters. These members use optical cables (optical fibers) as transmission lines 13 and 31 instead of coaxial cables. It is provided when used.

With this structure, the following operation is performed. First, the main signal path will be described. The main signal burst generated by the TDMA control unit 1 and the modulation unit 2 in the indoor device 100 is combined with the pilot burst signal by the combiner 3 and transmitted to the outdoor device 200. Then, the main signal in the IF band input to the outdoor device 200 is
It is sent to the transmission high frequency unit 25 via the distributor 15, the band pass filter 35, and the folding switching unit 24, power-amplified by the transmission amplifier 25-2, and transmitted from the antenna 27 via the hybrid 26.

On the other hand, on the receiving side, the main signal received by the antenna 27 is converted into the IF band by the receiving high-frequency section 28 via the hybrid 26, and is sent to the indoor unit 100 via the self-diagnosis return switch 29. Sent, demodulator 3
3 is demodulated and the baseband signal is converted into the TDMA control unit 34.
Is processed in. Next, the operation of the multi-carrier pilot burst will be described.

First, from the oscillators 4-1 to 4-3, the frequency
Is f₀, F₁, F₂Carrier is output and high frequency
Via the switches 7-1 to 7-3
f₀, F ₁, F₂Carriers are synthesized, and further synthesizer 3
Is combined with the main signal and transmitted to the outdoor wireless device 200.
Be done. At this time, the pilot burst control unit 11
Then, according to the control command, the high frequency switches 7-1 to 7-
3 is turned on within the guard time.

The main signal and pilot carrier transmitted to the indoor unit 200 are branched by the distributor 15. At this time, since the bandpass filter 35 is inserted in one of the main signal paths, only the main signal is transmitted to the transmission high frequency section 25. The other is distributed by the distributor 16, the bandpass filters 17-1 to 17-3 extract the pilot carrier components of the frequencies f ₀ , f ₁ and f ₂ , and the power detectors 20-1 to 20-3. Is detected.

The outputs of the power detectors 20-1 to 20-3 are input to the logic circuit 23, and the logic circuit 23 uses the combination of the frequencies f _{0 to} f ₂ for the wireless device 200.
The control command is determined to perform ON / OFF control of the transmission amplifier 26 and switching control of the loopback switching units 24 and 29. Here, as shown in FIG. 8, the frequency arrangement of pilot bursts is set to a frequency sufficiently low with respect to the IF frequency band.

The time relationship between pilot carrier transmission / detection operations is shown in FIG. That is, as shown in FIG. 7, first, the high frequency switches 7-1 to 7-3 are turned on under the control of the pilot burst control unit 11 so that the time (guard time) between the main signal bursts is reduced. A pilot carrier is transmitted to. After that, the pilot carrier passes through the bandpass filters 17-1 to 17-3 in the outdoor device, but at this time, a delay peculiar to the bandpass filter occurs. Then, the power detectors 20-1 to 20-3 detect the pilot carrier power, and the logic control unit 23 determines the presence / absence of the frequencies f _{0 to} f ₂ , and the transmission amplifier 25-2 and the return switching units 24 and 29. To control. The operation up to this point must be performed within the guard time. At this time, the logic control unit 23 continues this control for the time of one main signal burst.

[0021]

However, conventionally, as shown in FIG. 6, bandpass filters 17-1 to 17-3 are used to extract pilot carriers, and the carrier frequency is an intermediate frequency. Since the frequency is lower than the frequency of the signal (see FIG. 8), its delay time is large. For this reason, the time from the transmission of the pilot carrier to the start of control becomes large, and as a result, the operation of the logic control unit 23 must be performed at high speed, or in the worst case, the control of the wireless device is started within the guard time. There is a problem that it can not be done.

The present invention was devised in view of the above problems, and by making it possible to detect a pilot signal at high speed, the pilot signal transmission time from the start of control is shortened. It is an object of the present invention to provide a device-separated arrangement type TDMA transmission / reception device having a high-speed detector.

[0023]

FIG. 1 is a block diagram of the principle of the present invention. In FIG. 1, 100 is a first transmitting / receiving device and 200 is a second transmitting / receiving device. And
The second device 200 for transmission / reception is the first device 10 for transmission / reception.
0 connected via transmission lines 13 and 31, to the first transmission / reception device 100 at a distance, and remotely controlled by a pilot signal from the first transmission / reception device 100. Is.

By the way, the first transmitting / receiving apparatus 100 includes
A main signal burst generation unit 101 that generates a main signal burst modulated by the TDMA method by the TDMA control unit 1 and the modulation unit 2, and a pilot signal generation unit that generates a pilot signal for remotely controlling the transmitting / receiving second device 200. 102 and a synthesizing unit 3 for synthesizing the main signal burst and the pilot signal are provided, and the signal received by the demodulating unit 33 and the TDMA control unit 34 is T
Received signal demodulation unit 1 that performs modulation processing conforming to the DMA system
04 are provided.

In the second transmitting / receiving apparatus 200, a separating section 15 for separating the main signal burst and the pilot signal from the signal sent from the first transmitting / receiving apparatus 100 is separated by this separating section 15. A transmission high frequency unit 25 that frequency-converts a main signal burst and further amplifies it with an amplifier, a reception high-frequency unit 28 that frequency-converts a received signal, and a separation unit 1.
The pilot signal high-speed detecting section 202 for detecting the pilot signals separated by 5 at high speed, and the control in the transmitting / receiving second apparatus 200 based on the pilot signal information detected at high speed by the pilot signal high-speed detecting section 202 The remote control unit 203 is provided (the above are the constituent features of claim 1).

At this time, the pilot signal high speed detecting section 20
2 may include a frequency multiplier for multiplying the frequency of the pilot signal separated by the separation unit 15 (claim 2). In addition, the pilot signal high speed detection unit 20
2 includes a frequency discriminator that discriminates the frequencies of the pilot signals separated by the separation unit 15, and the remote control unit 203 includes a second device for transmission / reception based on the frequency information of the pilot signals discriminated by the frequency discriminator. It may be configured to perform the control within 200 (claim 3).

[0027]

In the device-separated arrangement type TDMA transmission / reception device having the pilot signal high-speed detection section of the present invention described above, as shown in FIG. 1, in the first transmission / reception apparatus 100, the main signal burst generation section 101 performs TDMA control. The main signal burst modulated by the TDMA method by the unit 1 and the modulator 2 is generated, and the pilot signal generator 102 is generated.
Then, a pilot signal is generated. Then, in the synthesis unit 3,
The main signal burst and the pilot signal are combined and sent to the second transmitting / receiving apparatus 200.

In the transmitting / receiving second device 200, the separating unit 15 separates the main signal burst and the pilot signal from the signal sent from the transmitting / receiving first device 100, but the separating unit 15 separates them. The frequency of the main signal burst thus generated is converted by the transmission high frequency unit 25 and further amplified by the amplifier. On the other hand, the signal received by the transmission / reception second device 200 is frequency-converted by the reception high frequency unit 28, and further by the demodulation unit 33 and the TDMA control unit 34 in the reception signal demodulation unit 104 of the transmission / reception first device 100. The received signal is modulated according to the TDMA method.

By the way, the pilot signal separated by the separating unit 15 is detected at high speed by the pilot signal high speed detecting unit 202, and further remote control is performed based on the pilot signal information detected at high speed by the pilot signal high speed detecting unit 202. The unit 203 controls the second transmitting / receiving device 200 (claim 1).

Further, when the pilot signal high speed detecting section 202 detects the pilot signal at high speed, the frequency of the pilot signal separated by the separating section 15 may be doubled by a frequency multiplier (claim). Item 2). Further, when the pilot signal high speed detecting unit 202 detects the pilot signal at high speed, the frequency of the pilot signal separated by the separating unit 15 is discriminated by the frequency discriminator, and further, by the frequency discriminator by the remote control unit 203. The control in the second device for transmission / reception 200 may be performed based on the frequency information of the pilot signal (claim 3).

[0031]

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

(A) Description of the First Embodiment FIG. 2 is a block diagram showing the first embodiment of the present invention.
Also in FIG. 2, the transmitting / receiving apparatus according to the present embodiment is
The indoor device 100 as the first transmitting / receiving device and the outdoor device (wireless device) 200 as the second transmitting / receiving device are provided separately. Then, the outdoor device 200
Are connected to the indoor unit 100 via transmission lines 13 and 31 and are arranged at a distance from the indoor unit 100. In the outdoor device 200,
A pilot signal from the indoor unit 100 is used to remotely control on / off of the transmission amplifier and self-diagnosis by folding back in the RF band and IF band.

Also in this embodiment, the indoor unit 10
0 has a transmitting system and a receiving system, and the indoor unit 10
In the transmission system of 0, the main signal burst generation unit 101,
A pilot signal generation unit 102 and a combining unit 3 are provided, and a reception system in the indoor device 100 is provided with a reception signal demodulation unit 104. Also, the outdoor device 200,
The outdoor device 200 is provided with a transmission system and a reception system. The outdoor device 200 is provided with a separation unit 15, a bandpass filter 35, a self-diagnosis folding switch 24, and a transmission high-frequency unit 25. In the receiving system, the receiving high frequency unit 28 and the self-diagnosis return switching unit 29 are provided. Further, the outdoor device 200 is provided with a pilot signal high speed detection unit 202 and a logic control unit 23 as a remote control unit. Further, the outdoor device 200 is provided with a hybrid 26 and a transmitting / receiving antenna 27.

Here, the main signal burst generator 101 in the indoor unit 100 has a TDMA controller 1 and a modulator 2.
(There may be more than one modulator 2),
By the TDMA control unit 1 and the modulation unit 2, the TD
It is possible to generate a modulated main signal burst according to the MA method. Further, the pilot signal generator 102 generates a pilot burst signal (auxiliary signal) for remotely controlling the outdoor device 200,
For this purpose, for example, oscillators 4-1 to 4-3 which output carriers having oscillation frequencies f ₀ , f ₁ and f ₂ and an oscillator 4-
High frequency switches 7-1 to 7-3 for turning on and off the carrier outputs from 1 to 4-3 and high frequency switches 7-1 to 7
The outdoor device 200 that controls the on / off of the high-frequency switches 7-1 to 7-3 and the combiner 10 that combines the signals passed through -3
In order to generate a signal of a pattern according to the member to be remotely controlled, the pilot burst control unit 11 is provided.

The synthesizer 3 synthesizes the main signal burst and the pilot burst signal. The reception signal demodulation unit 104 includes a demodulation unit 33 (there may be a plurality of demodulators 33) and a TDMA control unit 34. The demodulation unit 33 and the TDMA control unit 34 perform the TDMA method on the received signal. The modulation processing conforming to is applied.

Further, the separating unit 1 in the outdoor unit 200
5 is for separating the main signal burst and the pilot burst signal from the signal sent from the indoor device 100. The band-pass filter 35 filters only the main signal, and the self-diagnosis folding switch 24 cooperates with the self-diagnosis folding switch 29 to receive the main signal from the transmitting side during the self-diagnosis. It turns back to the side.
In the normal state, the self-diagnosis loopback switching unit 24 is switched so as to send the main signal to the transmission high frequency unit 25 side.

The transmission high frequency unit 25 converts the frequency of the main signal burst separated by the separation unit 15 and passed through the band pass filter 35 by the up converter 25-1 and further amplifies by the amplifier (high power amplifier) 25-2. Is. In addition, the transmission high-frequency unit 25 is also used for the pre-amplifier 2
5-3 and a band pass filter 25-4.
Further, the reception high-frequency unit 28 performs frequency conversion on the reception signal, and for this purpose, the bandpass filter 28-
1, amplifier (low noise amplifier) 28-2, 28-3,
It has a down converter 28-4.

The self-diagnosis return switch 29, in cooperation with the self-diagnosis return switch 24, returns the main signal from the transmitting side to the receiving side during the self-diagnosis. In the normal state, the self-diagnosis return switching device 29 is
It switches to pass the received signal.

By the way, the pilot signal high speed detector 20
2 is a distributor (power distributor) 16, for detecting the pilot burst signal separated by the separator 15 at high speed.
Frequency multipliers 42-1 to 42-3, bandpass filters 45-1 to 45-3, power detectors 48-1 to 48-3
It has Here, the divider 16 divides the pilot burst signal separated by the separator 15 into three, and the frequency multiplier 42-i divides the pilot burst signal divided into three by the distributor 16. Frequency is L, M,
It is N times larger. As a result, each frequency multiplier 42-i is configured as a frequency conversion unit that temporarily converts the pilot burst signal separated by the separation unit 15 into a high frequency.

Further, the bandpass filter 45-i sets the center frequencies to f ₀ × L, f ₁ × M and f ₂ × N, respectively, so that the output from each frequency multiplier 42-i is obtained. Among them, the corresponding up-converted pilot burst signal is detected. Further, the power detector 48-i performs power detection on the output of each bandpass filter 45-i.

In this way, the frequency multiplier 42-i (order = L, M, N) is connected to each output of the distributor 16, and the bandpass filter 45-i (center frequency) is connected to each frequency multiplier output. Is connected to L × f ₀ , M × f ₁ , N × f ₂ ), each bandpass filter output is connected to the power detector 48-i, and its output is connected to the logic control unit 23. Each output component of the distributor 16 has a frequency multiplier 42.
-I is L, M, N times multiplied, and the band-pass filter 45-i extracts only the multiplied pilot carrier of interest, and the power detector 48-i performs power detection.

By thus doubling, it is possible to widen the specific band of the bandpass filter 45-i, so that the delay time can be shortened. The logic control unit 23 controls the inside of the outdoor device 200 (for example, the amplifier 25-2) based on each pilot signal information (total 3 bits of information) detected by the pilot signal high speed detection unit 202.
ON / OFF control and self-diagnosis loopback switch 24, 29
Switching control).

Incidentally, also in FIG. 2, the electric / optical converter 1
2, 30 and the optical / electrical converters 14, 32 are provided when the optical cables (optical fibers) are used as the transmission lines 13, 31 instead of the coaxial cables.

With this structure, the following operation is performed. First, the main signal path will be described, but this is the same as the conventional one. That is, the indoor device 10
The main signal burst generated by the TDMA control unit 1 and the modulation unit 2 in 0 is combined with the pilot burst signal by the combiner 3 and transmitted to the outdoor device 200. The main signal in the IF band input to the outdoor device 200 is the distributor 1
5, transmitted through the bandpass filter 35 and the folding switch 24 to the transmission high frequency unit 25, and the transmission amplifier 25-2
The power is amplified by the antenna 2 through the hybrid 26.
Sent from 7.

On the other hand, on the receiving side, the main signal received from the antenna 27 is converted into the IF band by the receiving high-frequency section 28 via the hybrid 26, and is sent to the indoor unit 100 via the loopback switching unit 29. The baseband signal demodulated by the demodulation unit 33 is processed by the TDMA control unit 34. Next, the operation of the multi-carrier pilot burst will be described.

First, from the oscillators 4-1 to 4-3, the frequency
Is f₀, F₁, F₂Carrier is output and high frequency
Via the switches 7-1 to 7-3
f₀, F ₁, F₂Carriers are synthesized, and further synthesizer 3
Is combined with the main signal and transmitted to the outdoor wireless device 200.
Be done. At this time, the pilot burst control unit 11
Then, according to the control command, the high frequency switches 7-1 to 7-
3 is turned on within the guard time. This is the conventional one
It is the same operation as.

Then, the main signal and pilot carrier transmitted to the indoor unit 200 are branched by the distributor 15. At this time, since the bandpass filter 35 is inserted in one of the main signal paths, only the main signal is transmitted to the transmission high frequency section 25. The other power is distributed by the distributor 16, and each output component of the distributor 16 is multiplied by L, M and N by the frequency multiplier 42-i. Then, only the pilot carrier multiplied by the target is extracted by the bandpass filter 45-i, and the power is detected by the power detector 48-i. Then, after that, the output of each power detector 48-i is input to the logic circuit 23, and in this logic circuit 23, the control command of the wireless device 200 is judged by the combination of the frequencies f _{0 to} f ₂ , and the transmission amplifier 26 ON / OFF control and switching control of the loopback switching devices 24 and 29 are performed. The logic control unit 23 continues this control during the time of one main signal burst.

As described above, the transmission IF of the outdoor unit 200
The stage is branched, the divider 16 is provided, and the frequency multiplier 42-i is connected to each output of the divider 16, and the center frequency is each pilot carrier frequency x at the output of each frequency multiplier 42-i. Bandpass filter 45-
Since i is connected and the power detector 48-i is provided at the output of each bandpass filter 45-i so as to recognize the control command, it is possible to widen the band ratio of the bandpass filter. Therefore, the delay time can be shortened.

As described above, the time from the transmission of the pilot carrier to the start of the control can be greatly shortened. Therefore, in the first embodiment, it is not necessary to operate the logic control unit 23 at high speed, and further, the radio is controlled within the guard time. The possibility that the control of the device cannot be started is also eliminated. As a result, the device operation for each burst becomes stable and reliable. (B) Description of Second Embodiment FIG. 3 is a block diagram showing a second embodiment of the present invention.
Also in FIG. 3, the transmitting / receiving apparatus according to the present embodiment is
The indoor device 100 as the first transmitting / receiving device and the outdoor device (wireless device) 200 as the second transmitting / receiving device are provided separately. Then, the outdoor device 200
Are connected to the indoor unit 100 via transmission lines 13 and 31 and are arranged at a distance from the indoor unit 100. In the outdoor device 200,
A pilot signal from the indoor unit 100 is used to remotely control on / off of the transmission amplifier and self-diagnosis by folding back in the RF band and IF band.

Also in this embodiment, the indoor unit 10
0 has a transmitting system and a receiving system, and the indoor unit 10
In the transmission system of 0, the main signal burst generation unit 101,
A pilot signal generation unit 102 and a combining unit 3 are provided, and a reception system in the indoor device 100 is provided with a reception signal demodulation unit 104. Also, the outdoor device 200,
The outdoor device 200 is provided with a transmission system and a reception system. The outdoor device 200 is provided with a separation unit 15, a bandpass filter 35, a self-diagnosis folding switch 24, and a transmission high-frequency unit 25. In the receiving system, the receiving high frequency unit 28 and the self-diagnosis return switching unit 29 are provided. Further, the outdoor device 200 is provided with a pilot signal high speed detection unit 202 and a logic control unit 23 as a remote control unit. Further, the outdoor device 200 is provided with a hybrid 26 and a transmitting / receiving antenna 27.

Since the respective constituent elements of the indoor unit 100 are the same as those of the conventional example and the first embodiment, detailed description thereof will be omitted. In addition, the outdoor device 20
The components of 0 are the same as those of the conventional example and the first embodiment except the pilot signal high-speed detecting section 202, and thus detailed description thereof will be omitted.

By the way, the pilot signal high-speed detecting unit 202 according to the second embodiment detects the pilot burst signal separated by the separating unit 15 at high speed, so that the frequency discriminator 73 and the three discriminators 74-1 are provided. It has ~ 74-3. Here, the frequency discriminator 73 outputs a voltage according to the input frequency as shown in FIG.
4-1 is the output from the frequency discriminator 73 and the threshold value V _0.
(This V ₀ corresponds to the frequency f ₀ ) and the output of the frequency discriminator changes at the threshold V ₀ , and the discriminator 74-2 determines that the frequency discriminator 73 the output from the threshold V ₁ (the V ₁ was equivalent to a frequency f _1.) is compared with the threshold V ₁ frequency discriminator output
The output changes at the boundary of
The output from the frequency discriminator 73 and the threshold value V ₂ (this V ₂
Corresponds to the frequency f ₂ . ), The output of the frequency discriminator changes at the threshold V ₁ as a boundary.

It is to be noted that V ₀ > V ₁ + V ₂ and V ₁ > V ₂ are set. In this way, the branch output of the distributor 15 is input to the frequency discriminator 73, the output voltage of the frequency discriminator 73 is input to the discriminator 74-i, and the discrimination result is input to the logic controller 23. Each discriminator 7
The f-V characteristic of 4-i is as shown in FIG. 4, and V ₀ > V ₁ + V
_Since the discrimination characteristics and the frequencies f _{0 to} f ₂ are selected so that V ₂ , V ₁ > V ₂ , several kinds of output voltages depending on the combination of f _{0 to} f ₂ do not have the same value. Then, such discrimination is performed by the discriminator 74-i. The discriminator is not limited to three, but a plurality of required discriminators are provided. Further, if the Q of the frequency discriminator 73 is selected low, the frequency discrimination can be performed in a short time.

The logic control unit 23 uses each discriminator 74-i.
On the basis of the identification result in step S1, the control command of the wireless device 200 is determined based on the combination of these identification results, and the ON / OFF control of the transmission amplifier 26 and the switching control of the return switching devices 24 and 29 are performed. . Therefore, the pilot signal high-speed detection unit 202 includes the frequency discriminator 7 that discriminates the frequencies of the pilot signals separated by the separation unit 15.
3, the logical control unit 23 as a remote control unit is configured to control the inside of the outdoor device 200 based on the frequency information of the pilot signal discriminated by the frequency discriminator 73.

Also in FIG. 3, the electric / optical converters 12, 30 and the optical / electrical converters 14, 32 also use optical cables (optical fibers) as the transmission lines 13, 31 instead of the coaxial cables. In some cases.
That is, in the second embodiment, in order to detect the pilot signal at high speed as the pilot signal detecting section,
A pilot signal high-speed detection unit 202 having a frequency discriminator 73 for discriminating the frequencies of the pilot signals separated by the separation unit 15 is provided, and the outdoor device 200 is further based on the frequency information of the pilot signals discriminated by the frequency discriminator 73.
It can be seen that the point that the logical control section 23 as a remote control section for performing internal control is provided is different from the conventional example.

With this structure, the following operation is performed.
Done. Here, regarding the main signal path,
And the same as the first embodiment, the description thereof will be omitted.
The operation of the multi-carrier pilot burst.
It First, the frequency is f from the oscillators 4-1 to 4-3.₀,
f₁, F₂Carrier is output and high frequency switch 7-
1 through 7-3, the frequency is f₀, F ₁,
f₂Carriers are combined, and combined with the main signal in combiner 3.
And is transmitted to the outdoor wireless device 200. In addition,
At this time, the pilot burst control unit 11 controls
According to the law, set the high frequency switches 7-1 to 7-3 to guard
Im turned on. This is conventional and
The operation is the same as that of the first embodiment.

Then, the main signal and pilot carrier transmitted to the indoor unit 200 are branched by the distributor 15. At this time, since the bandpass filter 35 is inserted in one of the main signal paths, only the main signal is transmitted to the transmission high frequency section 25. On the other hand, the branch output of the distributor 15 is input to the frequency discriminator 73, and the frequency discriminator 7
The output voltage of No. 3 is input to the discriminator 74-i, and the discrimination result is input to the logic control unit 23. F- of each discriminator 74-i
As described above, the V characteristic is as shown in FIG. 4, and V ₀ > V ₁ +
Since the discrimination characteristics and the frequencies f _{0 to} f ₂ are selected so that V ₂ and V ₁ > V ₂ , the several output voltages due to the combination of f _{0 to} f ₂ do not have the same value. Then, such discrimination is performed by the discriminator 74-i. By selecting a low Q for the frequency discriminator 73, discrimination can be performed in a short time.

Then, in the logic circuit 23, the control command of the radio equipment 200 is judged from the identification result, and the transmission amplifier 2
6 on / off control and switching control of the return switching devices 24 and 29. The logic control unit 23 continues this control during the time of one main signal burst. As described above, the IF stage of the outdoor device 200 is branched and the frequency discriminator 7
By connecting 3 and having a plurality of discriminators 74-i at its output, the control command is recognized, so that the delay time is shortened as compared with the conventional case, and consequently, from the pilot carrier transmission to the control start. Since the time can be greatly shortened, the logic controller 23 is also used in this fifth embodiment.
It is not necessary to perform the above operation at high speed, and the possibility that the control of the wireless device cannot be started within the guard time is also eliminated. As a result, the device operation for each burst becomes stable and reliable.

As shown in FIG. 5, the output of the frequency discriminator 73 in the pilot signal high speed detector 202 is
The output voltage of the frequency discriminator 73 is A / D converted by connecting the A / D converter 77, coded, and input to the logic control unit 23, that is, the IF stage of the outdoor device 200 is branched. , Frequency discriminator 73 is connected, and A /
By connecting the D converter 77, the control command may be recognized. In this case, the logic control unit 23 may have a plurality of identification values regardless of the number of pilot carriers. It will be possible.

In FIG. 5, the same symbols as those in FIG. 3 indicate the same parts.

[0061]

As described in detail above, according to the device-separated arrangement type TDMA transmission / reception device having the pilot signal high-speed detection portion of the present invention according to claim 1, the pilot signal detection portion in the second transmission / reception device is , Since it is configured as a pilot signal high-speed detection unit that detects the pilot signal separated by the separation unit at high speed, it is not necessary to use a low-frequency band-pass filter for extracting the pilot signal. There is an advantage that the control of the second device for transmission / reception can be started in a short time, and the device operation for each burst becomes stable and reliable.

At this time, the pilot signal high speed detecting section
It is also possible to provide a frequency multiplier for multiplying the frequency of the pilot signal separated by the separation unit (Claim 2), but even in this case, the same effect as the invention of Claim 1 can be obtained. There are no advantages. Further, in the present invention according to claim 3, the pilot signal high-speed detecting section includes a frequency discriminator for discriminating the frequencies of the pilot signals separated by the separating section, and the remote control section comprises:
Since the control in the second device for transmission / reception is performed on the basis of the frequency information of the pilot signal discriminated by the frequency discriminator, the delay time is shortened as compared with the conventional one, and thus, from the transmission of pilot carrier to the start of control. Since it is possible to greatly reduce the time, it is not necessary to operate the remote control unit at high speed, and the fear that the control of the second device for transmission / reception cannot be started within the guard time is also eliminated.
As a result, the device operation for each burst becomes stable and reliable.

[Brief description of drawings]

FIG. 1 is a principle block diagram of the present invention.

FIG. 2 is a block diagram showing a first embodiment of the present invention.

FIG. 3 is a block diagram showing a second embodiment of the present invention.

FIG. 4 is a graph illustrating the operation of the second embodiment of the present invention.

FIG. 5 is a block diagram showing a modification of the second embodiment of the present invention.

FIG. 6 is a block diagram showing a conventional example.

FIG. 7 is a diagram illustrating an operation from transmission of a pilot carrier to control of an outdoor device, which is performed within a guard time.

FIG. 8 is a diagram illustrating frequency allocation of pilot carriers.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 TDMA control part 2 Modulation part 3 Compositing part 4-i Oscillator 7-i High frequency switch 10 Combiner 11 Pilot burst control part 12 Electric / optical converter 13 Transmission line 14 Optical / electrical converter 15 Separation part 16 Distributor (electric power) Distributor) 17-i Bandpass filter 20-i Power detector 23 Logic control unit (remote control unit) 24 Self-diagnosis folding switch 25 Transmit high frequency unit 25-1 Up converter 25-2 Amplifier (high power amplifier) 25 -3 Preamplifier 25-4 Bandpass filter 26 Hybrid 27 Transmission / reception antenna 28 Reception high frequency part 28-1 Bandpass filter 28-2, 28-3 Amplifier (low noise amplifier) 28-4 Downconverter 29 Self-diagnosis folding switch 30 electrical / optical converter 31 transmission line 32 optical / electrical conversion Device 33 Demodulation unit 34 TDMA control unit 35 Bandpass filter 42-i Frequency multiplier 45-i Bandpass filter 48-i Power detector 73 Frequency discriminator 74-i Discriminator 77 A / D converter 100 Indoor device ( (Transmission / reception first device) 101 Main signal burst generation unit 102 Pilot signal generation unit 104 Received signal demodulation unit 200 Outdoor device (wireless device; transmission / reception second device) 201 Pilot signal detection unit 202 Pilot signal high speed detection unit 203 Remote control unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Maruyama 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited (72) Inventor Ryutaro Omoto 1-6, Uchiyuki-cho, Chiyoda-ku, Tokyo Nihon Telegraph Phone Co., Ltd.

Claims (3)

[Claims] 1. A first device for transmission / reception, which is connected to the first device for transmission / reception via a transmission line and which is arranged at a distance from the first device for transmission / reception and which is the first device for transmission / reception. A transmission / reception second device that is remotely controlled by a pilot signal from the device, and a transmission / reception first device that generates a main signal burst generated by the TDMA control unit and the modulation unit by the TDMA method. A demodulation unit, a pilot signal generation unit that generates the pilot signal for remotely controlling the second device for transmission / reception, and a synthesis unit that synthesizes the main signal burst and the pilot signal. A reception signal demodulation unit that performs a modulation process that conforms to the TDMA system with respect to the signal received by the TDMA control unit is provided, A separation unit for separating the main signal burst and the pilot signal from the signal sent from the credit first device, and a transmission high-frequency unit for frequency-converting the main signal burst separated by the separation unit and further amplifying it by an amplifier. A reception high frequency unit for frequency conversion of the reception signal, a pilot signal high speed detection unit for detecting the pilot signal separated by the separation unit at high speed, and a pilot signal detected at high speed for the pilot signal high speed detection unit And a remote control section for controlling the inside of the second transmitting and receiving device based on information.
Device-separated type TD having high-speed pilot signal detector
MA type transceiver. 2. The pilot signal high-speed detecting section is configured with a frequency multiplier for multiplying the frequency of the pilot signal separated by the separating section. A device-separated TDMA transceiver having a high-speed pilot signal detector. 3. The pilot signal high-speed detection unit includes a frequency discriminator that discriminates the frequencies of the pilot signals separated by the separating unit, and the remote control unit discriminates by the frequency discriminator. 2. The device-separated TDMA type transmitter / receiver having a pilot signal high-speed detecting unit according to claim 1, wherein the control is performed in the second transmitter / receiver device based on frequency information of the pilot signal. .