JPH0728250B2 - Wireless repeater transmission method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a transmission system of a wireless repeater, and particularly to a heterodyne relay and a regenerative relay system, which are transmission systems of high frequency signals in wireless communication using a satellite. The present invention relates to a transmission system of a wireless repeater that can be operated at the same time.

[Conventional technology]

Conventionally, a radio repeater mounted on this type of satellite employs either a heterodyne relay system or a regenerative relay system, which is a single transmission system. For example, as shown in the block diagrams of FIGS. 3 and 4, a transmission / reception demultiplexer-multiplexer (hereinafter referred to as DIP) 3
0, a receiver (hereinafter referred to as RX) 31, a transmitter (hereinafter referred to as TX) 32, and a modulator / demodulator (hereinafter referred to as MODEM) 33. FIG. 3 shows a so-called heterodyne relay type wireless repeater which converts a reception signal frequency into a transmission signal frequency and outputs the same. FIG. 4 shows a regenerative repeater type wireless repeater that demodulates the received signal frequency once, and then modulates and outputs it as the transmitted signal frequency.

[Problems to be Solved by the Invention]

The above-described conventional wireless repeater transmission method has a drawback in that the transmission method cannot be changed because the transmission method of the high frequency signal is fixed to either the heterodyne relay method or the regeneration relay method.

An object of the present invention is to provide a single radiodyne relay system or a single regenerative relay system or a simultaneous heterodyne relay and regenerative relay system by a simple control of the configuration of the radio repeater mounted on a satellite or the like. It is to provide a transmission system of a wireless repeater that can be switched to operation.

[Means for Solving the Problems]

The transmission system of the wireless repeater of the present invention is a transmission system of a wireless repeater that includes a transmitter and a receiver that perform relay transmission of a high frequency signal channel, and a modulation / demodulation device. Transmitting the high-frequency signal channel by switching to a heterodyne relay system or a regenerative relay system by a control signal, or
Operates whether the heterodyne relay system and the regenerative relay system are combined for simultaneous transmission.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of the first embodiment of the present invention.
In the embodiment shown in FIG. 1, DIP1, RX5, TX3, switches (hereinafter referred to as SW) 8, SW9 and SW10 constitute a first radio repeater side for transmitting and receiving high frequency signals to earth stations in the same area. Also, DIP
2, RX6, TX4, SW11, SW12, and SW13 form a second wireless repeater side that is directed to earth stations in other areas. Modulator / demodulator (below
MODEM 7), hybrid (hereinafter HYB) 14,1
5 is the configuration required for the regeneration relay system. When performing communication by the heterodyne relay system with such a wireless relay device, there are four types of signal flows through the following circuit elements by the switch operation of SW8 to SW13.

Heterojunction A, Input 16 → DIP1 → RX5 → SW10 → SW9 → SW8 → TX3
→ DIP1 → Output 16, Heterojunction B, Input 16 → RX5 → SW10 → HYB15 → SW11 → TX4 → D
IP2 → output 17, hetero relay C, input 17 → DIP2 → RX6 → SW13 → SW12 → SW11 → T
X4 → DIP2 → Output 17, Hetero relay D, Input 17 → DIP2 → RX6 → SW13 → HYB14 → SW8 → T
X3 → DIP1 → output 16, the signal flow when performing communication by the regenerative repeater system has four configurations by operating the switches of SW8-13.

Replay relay A, Input 16 → DIP1 → RX5 → SW10 → SW9 → MODEM7 → HY
B14 → SW8 → TX3 → DIP1 → Output 16, Playback B, Input 16 → DIP1 → RX5 → SW10 → SW9 → MODEM7 → HY
B14 → SW13 → SW12 → SW11 → TX4 → DIP2 → Output 17, Playback relay C, Input 17 → DIP2 → RX6 → SW13 → SW12 → MODEM7 → H
YB15 → SW11 → TX4 → DIP2 → Output 17, Playback relay D, Input 17 → DIP2 → RX6 → SW13 → SW12 → MODEM7 → H
YB14➝SW8➝TX3➝DIP1➝Output 16, Next, a second embodiment of the present invention will be described with reference to the block diagram of FIG. The second embodiment shows a configuration in which the heterodyne relay system and the regenerative relay system are simultaneously executed. That is, in the second embodiment of FIG.
The structure is the same as that of the first embodiment except that it is replaced with YB18-23. For example, when the reception input of the input terminal 16 is output to the output terminal 17 by the heterodyne relay system B ', and another reception input having a different high frequency from the input terminal 16 is output to the output terminal 17 by the regenerative relay system B'. In this case, the signal flow of each method is transmitted by the following configuration as an example.

In case of heterodyne relay system B ′ Input 16 → DIP1 → RX5 → HYB20 → HYB15 → HYB21 → TX4 → DIP2
→ Output 17, in case of playback relay system B'Input 16 → DIP1 → RX5 → HYB20 → HYB19 → MODEN7 → HYB15 → HY
B21 → TX4 → DIP2 → Output 17, In this case, the intermediate frequency of RX5 of the heterodyne relay system and the intermediate frequency of MODEM7 output of the regenerative relay system are synthesized by HYB5, so the intermediate frequencies are made different or phase synchronization between them is performed. It is possible to operate the two relay systems simultaneously by using the means for taking.

〔The invention's effect〕

As described above, the present invention is particularly suitable for satellite communication by providing a switch or hybrid for connecting the output of the receiver to the receiver in any direction in the state of the intermediate frequency signal and further providing a modulator / demodulator for regenerative relaying. There is an effect that it is possible to configure a heterodyne relay system and a regenerative relay system, which are independently or simultaneously operated, by controlling from the ground such relay in multiple directions.

[Brief description of drawings]

FIG. 1 is a block diagram of a first embodiment of the present invention, FIG. 2 is a block diagram of a second embodiment of the present invention, FIG. 3 and FIG.
FIG. 1 is a block diagram of a transmission system of a conventional wireless repeater. 1,2,30 …… Transmit / receive demultiplexer / multiplexer (DIP), 3,4,32 …… Transmitter (TX), 5,6,31 …… Receiver (RX), 7,33 …… Modulator / demodulator (MODEM), 8 to 13 ... Switch (SW), 14,15 ... Hybrid (HYB), 16,17 ... I / O terminals, 18 to 23 ... Hybrid (HYB).

Claims (1)

[Claims] 1. In a transmission system of a wireless repeater comprising a transmitter and a receiver for relaying and transmitting a high frequency signal channel, and a modulator / demodulator, the high frequency signal channel is received and the high frequency signal is generated by a control signal from the outside. A radio repeater characterized by performing operation of switching the signal channel to either the heterodyne relay system or the regenerative relay system for transmission, or performing the simultaneous transmission by combining the heterodyne relay system and the regenerative relay system. Transmission method.