Full-rate multi-hop wireless collaboration relay transmission scheme

Abstract

The invention discloses a multi-hop wireless collaboration relay scheme which can realize full-rate data transmission, and is applicable for a distributed wireless communication network. In the scheme, the data transmission from a source node S to a target node D is finished by three links; each link consists of a plurality of relay node groups in a forwarding mode; the data communication on each link is divided into a plurality of basic transmission processes; distance relay communication can be realized by cascading the basic transmission processes; each basic transmission process consists of three communication stages, a baseband signal transmitted in each communication stage is a modulation symbol obtained by linear complex field coding; each relay node group finishes the forwarding of the received signals by adopting a cycle delay diversity way; and while the high-reliability information transmission is realized, the receiving end only needs to perform joint detection on three symbols, so that the detection complexity is low, and the practical value is high. In addition, in the relay transmission process, if the relay groups in unequal numbers are distributed for the to-be-transmitted information with different priority levels and error code performance requirements, the disclosed multi-hop collaboration relay scheme can be used for the hierarchical transmission of data after being adjusted, so that the transmission quality requirements of a plurality of types of wireless service are met.

Description

technical field [0001] The invention relates to a full-rate multi-hop wireless cooperative relay transmission scheme, which is suitable for a distributed wireless cooperative communication network, and can extend the relay communication distance while obtaining the potential diversity gain between relay nodes, and the detection complexity of the receiving end is relatively low. Low. Background technique [0002] With the rapid development of wireless multimedia services and applications, distributed wireless communication systems with low power consumption and self-organizing network capabilities, such as wireless sensor networks, Ad-hoc, Mesh networks, etc. ", the main framework of the "Digital City" network, has received the general attention of scientific researchers at home and abroad. Although the specific implementation technologies used by these networks are slightly different, there are many similarities. For example, in the design process of the physical layer, com...

AI Technical Summary

Problems solved by technology

This type of relay structure not only increases the transmission delay, but also makes it difficult to achieve high-speed data communication, wasting precious wireless spectrum resources

In addition, the increase in the complexity of the cooperative relay transmission structure also brings a series of difficulties to be overcome, which weakens the advantages of the cooperative relay transmission technology and delays the pace of its popularization and application in low-power wireless networks.

[0004] The published national invention patent "Full-rate Wireless Cooperative Relay Transmission Scheme with Low Detection Complexity" (application number: 201110023040.4) studies the full-rate transmission scheme that can achieve low-complexity detection, but its work is limited to the two-hop model, The transmit power of the source node is not constant, and the communication distance and application range are greatly limited

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