Receiving and transmitting method for realizing irrelevant receiving by relevant network code

Abstract

The invention relates to a wireless multi-hop network technology, in particular to a receiving and transmitting method for realizing irrelevant receiving by a relevant network code. In order to improve the wireless multi-hop communication transmission efficiency and reduce the technical complexity and the communication error code rate, the method comprises the following steps of: carrying out relevant network PCNC coding in a source end physical layer; detecting and utilizing a unique mapping relation to map a detected signal into a de-noised mixed signal by a relay through the channel attenuation coefficient and carrying out differential modulation on the mixed signal to be transmitted to two mutually communicated source ends; during receiving at the source ends, realizing the irrelevant receiving under the condition of not learning any channel characteristic by a differential relation of signals before and after mapping by the mixed signal to recover a signal sum of the two continuous time slots and subtracting the signal at the local end to obtain a signal at the opposite end. The invention is mainly used for the transmission in wireless cooperative communication needing the relay and the transmission between a base station without a straight transmission line and a mobile terminal.

Description

technical field [0001] The invention relates to a wireless multi-hop network technology that can be applied to the transmission in the wireless cooperative communication that needs relay, the transmission between the base station and the mobile terminal without a straight-line propagation line. Specifically, it relates to a non-correlation receiving method for improving the quality of relay signals by using correlation network coding. technical background [0002] In a wireless network, if the distance between the sending end and the receiving end is too large, or the channel is very bad, the bit error rate will increase. Cooperative relay is to solve these two problems by adding a relay node between the transmitting end and the receiving end, so as to improve the signal quality and reduce the bit error rate. The physical layer network coding is used to mix the signals of multiple sources at the relay node, instead of decoding the signals of each source separately, which ca...

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Problems solved by technology

[0004] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to improve the transmission efficiency of wireless multi-hop communication, reduce technical complexity, and achieve a low communication bit error rate in the case of a high signal-to-noise ratio

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