Multi-user network coding communication method with high-speed parallel encoding and decoding structure

Abstract

The invention discloses a multi-user network coding communication method with a high speed parallel encoding and decoding structure, which comprises the following steps: in a wireless relay network, multiple accessed user information is integrally interweaved by a relay node, serial / parallel conversion is carried out on the interweaved sequence, multiple groups of converted parallel data are input to a high speed parallel encoder to be encoded, and finally encoded data is broadcasted, thus realizing network encoding. A base station carries out teration decoding by means of a combined network-channel decoder according to original data broadcasted by users and data obtained by network encoding and channel encoding and forwarded by the relay node to obtain the original information of the users. The decoder of the base station comprises two parallel decoder groups, i.e. a user decoder group and a relay decoder group; iteration decoding is realized through transmitting soft information between two parallel decoder groups, thus not only recovering the original information of all accessed users but also improving decoding reliability and reducing decoding time delay. By adopting the method, the relay uplink transmission efficiency and the quality of transmission signal are improved.

Description

technical field [0001] The present invention relates to a method for realizing multi-user network coding technology used in wireless communication network, specifically, relates to a method of multi-user network coding communication with high-speed parallel coding and decoding structure. The invention belongs to the technical field of cooperative communication in wireless communication. Background technique [0002] In order to meet the high-speed and wide-coverage requirements of the next-generation wireless communication, the usual solution is to introduce relays into the traditional centralized cellular communication network. By reducing transmission loss, signal reconstruction and forwarding and other technical means, effectively The coverage, transmission capacity and operating cost of the wireless communication system are improved. In practical applications, in order to avoid mutual interference between signal streams transmitted by multiple users in parallel, traditi...

AI Technical Summary

Problems solved by technology

[0012] (2) In the existing network coding application scenarios based on the relay system, the relay node can only perform network coding operations on the information of two paired users; when multiple users access the network, the relay node will not be able to simultaneously Network coding of user data from multiple links reduces system transmission efficiency

In this way, the length of the encoding block becomes longer, resulting in a significant increase in encoding complexity and processing delay, which is sometimes intolerable in actual system applications

Images