JPH05300128A - Information transmitting communication system - Google Patents

Abstract

PURPOSE:To improve efficiency for transmitting information by selecting the combination of encoders and decoders corresponding to the quality of received signals. CONSTITUTION:Assuming that the error correcting ability of the combination of an encoder 3 and a decoder 10 is higher than that of the combination of an encoder 2 and a decoder 9, the redundancy is higher and information transmission speed is lower, the outputs of the encoders 2 and 3 are selected by a selector 4 corresponding to a code select signal outputted by a receiver 7, and transmitted through a radio line by a transmitter 5. The received signal is inputted to the decoders 9 and 10 and an encoder deciding part 11 of a reception equipment 10. The encoder deciding part 11 evaluates the quality of the received signal, selects either the combination of the encoder 2 and the decoder 9 or the combination of the encoder 3 and the decoder 10 corresponding to the quality, and outputs a selection decide signal. The selection decide signal is turned to the code select signal of the selector 4 at a transmission equipment 101 by a transmitter 8 and the receiver 7, a selector 12 selects either the output of the decoder 9 or that of the decoder 10 corresponding to the code select signal, and a destination reception part 13 inputs the selected output signal.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an information transmission communication system.

[0002]

2. Description of the Related Art A conventional information transmission communication system will be described with reference to the drawings.

FIG. 2 is a block diagram of a mobile transmission system as an example of a conventional information transmission system.

In FIG. 2, the conventional mobile communication system comprises a transmitter 201 and a receiver 202. The transmitter 201 includes an information source 21, an encoder 22 having the information source 21 as an input, and an encoder 22. And a transmitter 23 for transmitting the output of the above to the air, and the receiving device 202 has a receiver 24 for receiving from the antenna and a decoder 25 for decoding the received signal.
And a destination receiving unit 26 for receiving the decoded signal, and using a predetermined combination of the encoder 22 and the decoder 25 regardless of the magnitude of the error in the received signal, the transmitter 20
1 and the receiving device 202 were communicating with each other.

[0005]

Generally, there is a relation that an attempt to enhance the error correction capability of a code increases the redundancy occupied in a transmission signal. When the reception state is better than the error correction capability of the encoder and the decoder, useless redundant signals are increased, which is against the effective use of the wireless channel, and the reception state is the encoder and the decoder. If it is worse than the error correction capability of (1), there is a problem that the transmission signal is not correctly decoded and retransmission and the like are troublesome, and the information transmission speed is reduced.

[0006]

The information transmission communication system of the present invention comprises a transmitter and a receiver connected via a transmission line, and the transmitter receives an information source and the information source as an input. The receiver includes a plurality of encoders having different error correction capabilities, an encoder selector that selects one of the plurality of encoders, and a transmitter that transmits information to the transmission path, and the reception device has the transmission path. From the receiver, a plurality of decoders having different error correction capabilities and receiving a received signal from the receiver, and a decoder selector that selects one of the plurality of decoders. In addition, the signal quality of the received signal is evaluated, and as a result of the evaluation, a selection signal is sent to the encoder selector and the decoder selector to transmit one of the plurality of encoders and one of the plurality of decoders. It has a determination means for determining the combination.

[0007]

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

FIG. 1 is a block diagram showing an embodiment of the present invention.

In FIG. 1, this embodiment comprises a transmitter 101 and a receiver 102 connected by a wireless line. The transmitter 101 encodes an information source 1 and a signal from the information source 1. Encoder 2 for adding the first error correction code
An encoder 3 for encoding a signal from the information source 1 to add an error correction code higher than the first error correction code, and a selector 4 for selecting the encoder 2 or an output of the encoder 3. A transmitter 5 that converts an output signal from the selector 4 into a wireless signal and transmits the wireless line, and a receiver 7 that receives a selection determination signal from the receiving device 102 and sends a code selection signal to the selector 4.
And is configured.

The receiving device 102 includes a receiver 6 that receives a radio signal from the transmitter 5, decoders 9 and 10 that encode the received signal from the receiver 6, and a decoded signal from the decoders 9 and 10. Selector 12 for selecting, and quality evaluation of the signal received from receiver 6 are performed by encoder 2-decoder 9, encoder 3-
An encoder deciding unit 11 that decides either combination of the decoders 10 and sends a selection decision signal to the selector 12, and a transmitter 8 that receives the selection decision signal and sends it to the receiver 7 via a wireless line. And a destination receiver 13 that receives the selected decoded signal from the selector 12.

Next, the operation of this embodiment will be described.

In this embodiment, the decoder 9 is predetermined for the encoder 2, the decoder 10 is predetermined for the encoder 3, and the encoder 3-decoder 10 is the encoder 2 more. -It is assumed that the error correction capability is higher than the decoder 9, the redundancy is high, and the information transmission speed is low.

The information sent from the information source 1 capable of increasing or decreasing the information length is input to the encoder 2 and the encoder, and the information length of the information input to the encoder 2 is input to the encoder 3. The encoder 2 and the encoder 3 are longer than the information length of the information
Is selected by the selector 4 by the code selection signal which is the output of the receiver 7, and the output of the selector 4 is wirelessly transmitted by the transmitter 5.

The received signal is input from the receiver 6 to the decoder 9 and the decoder 10 of the receiving apparatus 102, and the encoder determination unit 11 for evaluating the quality of the received signal.

The encoder decision unit 11 evaluates the quality of the input received signal, selects the combination of the encoder 2-decoder 9 or the combination of the encoder 3-decoder 10 according to the quality, and determines the selection. Output a signal.

The selection decision signal becomes the code selection signal of the selector 4 of the transmission device 101 by the transmitter 8 and the receiver 7, and the selector 12 outputs the output of the decoder 9 or the decoder 10 according to the code selection signal. The destination receiving unit 13 selects and outputs the selected output signal.

[0017]

As described above, according to the present invention, when the quality of a received signal is evaluated on the side of the receiving device and the quality is good, the first encoder having low redundancy and low error correction capability-first By selecting a combination of decoders and a combination of a second encoder and a second decoder having a high degree of redundancy and a high error correction capability when the quality is poor, the information transmission rate is increased and the information transmission is performed. Since it is possible to improve the reliability of the information and always select the optimum redundancy, it is possible to always transmit a large amount of information with the optimum reliability and to improve the information transmission efficiency.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram of a mobile transmission system as an example of a conventional information transmission system.

[Explanation of symbols]

 1 Information Source 2 Encoder 3 Encoder 4 Encoder Selector 5 Transmitter 6 Receiver 7 Receiver 8 Transmitter 9 Decoder 10 Decoder 11 Encoder Determinator 12 Decoder Selector 13 Destination Receiver 21 Information Source 22 Encoder 23 Transmitter 24 Receiver 25 Decoder 26 Destination receiver 101,201 Transmitter 102,202 Receiver

Claims (1)

[Claims] 1. A transmission device and a reception device, which are connected via a transmission line, wherein the transmission device comprises an information source, and a plurality of encoders having the error correction capability and having the information source as inputs.
An encoder selector that selects one of the plurality of encoders, and a transmitter that transmits information to the transmission path, wherein the receiving device is a receiver that receives the information from the transmission path, and Equipped with a plurality of decoders having different error correction capabilities, which receive the received signal from the receiver, and a decoder selector that selects one of the plurality of decoders, and evaluates the signal quality of the received signal. As a result of the evaluation, there is provided determination means for sending a selection signal to the encoder selector and the decoder selector to determine a combination of one of the plurality of encoders and one of the plurality of decoders. Information transmission system.