Full-rate distributed type multi-antenna bi-directional wireless cooperative relay transmission method

A technology of cooperative relay and transmission method, applied in transmission systems, digital transmission systems, multi-frequency code systems, etc., can solve the problems of low versatility, high coding and detection complexity, and achieve the effect of reducing implementation costs.

Inactive Publication Date: 2014-08-06
ANHUI UNIVERSITY
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Problems solved by technology

The survey found that most of the distributed space-time-frequency coding methods published at home and abroad are designed for one or a few types of application requirements, and the versatility is not strong. Some schemes still have problems such as high coding and detection complexity.

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  • Full-rate distributed type multi-antenna bi-directional wireless cooperative relay transmission method
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  • Full-rate distributed type multi-antenna bi-directional wireless cooperative relay transmission method

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Embodiment Construction

[0051] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0052] Such as figure 1 As shown, the present invention adopts a kind of general two-way relay communication network that is applicable to two communication source nodes and all relay nodes are equipped with multiple antennas, and the network is defined to be composed of K relay nodes (R 1 , R 2 ,...,R K ) to assist two communication source nodes (T 1 and T 2 ) to complete two-way data communication, each communication source node and relay node are equipped with N antennas and M antennas respectively, abbreviated as (N, M, K) system, defining two communication source nodes T 1 and T 2 There is no direct link between them, each communication node works in half-duplex communication mode, and the information transmission between nodes is completed by Orthogonal Frequency Division Multiplexing (OFDM: Orthogonal Frequency Division Multiplexing). The antenna corresp...

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Abstract

A full-rate distributed type multi-antenna bi-directional wireless cooperative relay transmission method is suitable for a universal bi-directional relay communication network, wherein two communication source nodes and all relay nodes of the universal bi-directional relay communication network are respectively provided with a plurality of antennas. Information transmission between the nodes is carried out in an orthogonal frequency division multiplexing mode. A data communication process comprises two stages, wherein firstly, the communication source nodes conduct joint encoding on symbols to be transmitted in all sub-carriers and a plurality of time slots respectively and broadcast the encoded symbols to the relay nodes; secondly, each relay node conducts circular delay on received modulating signals in a time domain firstly, then the antennas on each relay node transmit processed signals to the communication source nodes sequentially in a time division working mode, and according to encoding and transmitting criterions, one source node obtains data transmitted by the other source node after eliminating signal interference of the former source node. The full-rate distributed type multi-antenna bi-directional wireless cooperative relay transmission method has the advantages that the expansibility is good, an encoding process is simple and easy to design, full-rate transmission can be achieved, the detection complexity is low, and very high application value is achieved.

Description

technical field [0001] The invention relates to a full-rate distributed multi-antenna two-way wireless cooperative relay transmission method, which is suitable for a general scenario where two communication source nodes and all relay nodes are equipped with multiple antennas, can realize full-rate transmission, and has a simple encoding process and It is easy to design, and the detection model and detection complexity of the receiving end do not change with the increase of the number of relay nodes, which is beneficial to reduce the cost of hardware implementation. Background technique [0002] With the rapid development of wireless communication services, the demand for high-quality mobile communication services has led to a rapid increase in the demand for the capacity of wireless communication systems worldwide. But on the other hand, the available wireless spectrum is very limited. How to improve the spectrum efficiency of wireless communication systems under the conditi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L1/00
Inventor 张红伟李凤珍高新意谢宝林
Owner ANHUI UNIVERSITY
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