Multi-antenna two-way relaying compressing-forwarding method based on joint eigen-decomposition

A two-way relay and joint feature technology, applied in radio transmission systems, advanced technologies, electrical components, etc., can solve the problems that the advantages of multi-antenna systems cannot be reflected, the characteristics of multi-antennas cannot be fully utilized, and system performance is reduced

Inactive Publication Date: 2015-12-23
SHANGHAI DIANJI UNIV
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Problems solved by technology

[0020] In the multi-antenna two-way relay communication system, the original relay transmission protocol of the single-antenna system cannot fully uti

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  • Multi-antenna two-way relaying compressing-forwarding method based on joint eigen-decomposition
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  • Multi-antenna two-way relaying compressing-forwarding method based on joint eigen-decomposition

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Embodiment Construction

[0084] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0085] Such as figure 1 As shown, in the multi-antenna two-way relay channel, the two source nodes S1 and S2 are divided into (S1 and S2 are the labels of the two source nodes, for the convenience of the following description) respectively m1 and m2 (m1 and m2 are the number of antennas ) antennas, and the relay node R has mr antennas. The channel between the two source nodes S1 and S2 and the relay node R has duality, that is, the channel matrix is ​​expressed as (H 1R Indicates the channel between S1 at the sending end and R at the receiving end, H R1 Indicates the channel between R at the sender and S1 at the receiver, F 2R Indicates the channel between S2 at the sending end and R at the receiving end, F R2 Indicates the ...

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Abstract

The invention provides a multi-antenna two-way relaying compressing-forwarding method based on joint eigen-decomposition. A Lagrange optimization method is adopted. Firstly, a Lagrange function is written, and then a KKT (Karush Kuhn-Tucker) condition is used for performing resolution. The method is based on energy concentration and optimal characteristics of KKT transform, and joint approximate eigenvalue diversity is adopted. The aim is to decompose a plurality of matrixes at the same time with the same unitary matrix. A relay node is used for performing KLT transform on a received signal firstly, and performing vector quantization. The basic thought is to integrally quantize a vector consisting of a plurality of scalar data in a vector space, so that data is compressed, and information loss is reduced as much as possible. Through adoption of the Lagrange optimization method, an optimal compression noise vector, increase and rate are obtained. The invention substantially aims to allocate low-power quantization noise to channels with good channel conditions. Through adoption of an improved compressing-forwarding method, the system rate performance can be improved. In an asymmetrical two-way relaying channel, the advantage of enhancing the rate performance becomes more outstanding.

Description

technical field [0001] The invention relates to a multi-antenna bidirectional relay compression and forwarding method based on joint eigenvalue decomposition. Background technique [0002] Relay transmission technology (Relaying) is one of the key technologies of LTE system, which has attracted extensive attention of researchers. In the early days, the research on the relay communication system was mainly carried out around the one-way relaying technology (One-way relaying). However, in the half-duplex working mode, the one-way relay needs four time slots to complete the downlink (ie, base station to mobile terminal) and uplink (ie, mobile terminal to base station) information exchange. After adopting Physical-layer network coding (Physical-layer network coding), the relay node can not only forward data, but also has the ability to process data, so that the complete interaction between uplink and downlink can be completed within two or three time slots. It is called two-wa...

Claims

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Application Information

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IPC IPC(8): H04B7/155
CPCH04B7/15521Y02D30/70
Inventor 林晓晨
Owner SHANGHAI DIANJI UNIV
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