Demodulation forwarding collaborative communication method for joint coding of channel and network under multiple subscribers

Abstract

The invention discloses a demodulation forwarding collaborative communication method for the joint coding of a channel and a network under multiple subscribers, belonging to the technical filed of wireless communication. The method comprises the following steps: firstly, carrying out channel coding, random interlacing and BPSK (binary phase shift keying) modulation on respective information by subscribes at a transmitting end, and then transmitting the information to a relay end and a base station; and then carrying out modulation, deinterlacing, network coding, secondary channel coding, random interlacing and BPSK modulation on received multiple subscriber signals by the relay end, an then transmitting the signals to the base station; and finally, carrying demodulation and deinterlacing on received signal combinations from subscribers and the relay end by the base station, and using a joint decoding matrix to carry out the joint decoding of the channel and the network, thus finally obtaining information transmitted by subscribers at the transmitting end. In the invention, the technology of joint coding of the channel and the network and the technology of demodulation forwarding collaborative communication are utilized to realize the performance of error rate similar to that of the traditional DF (decoding forwarding) relay end collaborative communication mode, reducing the hardware complexness of nodes of the relay end and reducing the transmission delay and power consumption of a system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to network coding, channel coding and cooperative communication technology in wireless communication. Background technique [0002] The network coding theory was originally proposed by Ahlswede et al. in wired communication networks. It is a new network transmission technology for increasing network transmission capacity, improving throughput, enhancing network robustness, and balancing network load. Cooperative communication technology was originally evolved from the classic three-terminal relay channel model proposed by Van Der Meulen in 1971. [0003] Yingda Chen et al. first introduced network coding technology into cooperative communication. They assumed that the information transmission between users was reliable. On this basis, they studied the decoding-front-pass (DF) cooperative communication method based on network coding (NC). In this scheme , the relay end ...

AI Technical Summary

Problems solved by technology

Since the system model only demodulates the signal received by the relay end without decoding it, the complexity of the equipment is greatly reduced and it is more practical, but it also leads to the transmission error of the system in the case of multiple clients poor performance

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