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Random mapping code-based data transmission method in wireless relay system

A data transmission method and random mapping technology, applied in the field of cooperative communication in wireless communication, can solve problems such as limited dynamic range of rate adjustment, achieve high system throughput, solve delay and error problems, and have broad application prospects.

Active Publication Date: 2016-05-04
TONGJI UNIV
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  • Claims
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Problems solved by technology

[0011] Second, the dynamic adjustment range of the rate is limited, and the rate adjustment is stepped
However, these binary encoding methods have obvious threshold effects

Method used

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  • Random mapping code-based data transmission method in wireless relay system
  • Random mapping code-based data transmission method in wireless relay system
  • Random mapping code-based data transmission method in wireless relay system

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Embodiment Construction

[0059] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0060] Such as figure 2 As shown, the present invention considers a simplified Gaussian relay system model composed of three nodes. In this model, the relay channel has only one transmitter and one receiver, and the relay channel has only one relay station. Usually a relay strategy can be modeled as two orthogonal stages to avoid interference between the two stages. Assume that the entire system works in half-duplex mode. The entire transmission is divided into two phases in time: phase 1, the source node broadcasts information to the relay node and the destination node; phase 2, ...

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Abstract

The invention relates to a random mapping code-based data transmission method in a wireless relay system. The method includes the following steps that: S1, a weight vector w is given, a source node obtains RPC symbols through adopting a random mapping mode establishing method and based on w and a binary information sequence, and broadcasts an RPC symbol x; S2, a relay node receives an RPC symbol ysr which is broadcasted by the source node through a channel and performs Coset encoding on the RPC symbol ysr so as to obtain an RPC symbol lr which has been subjected to quantized modulo operation, and forwards the RPC symbol lr to a destination node; S3, the destination node receives an RPC symbol ysd which is broadcasted by the source node through a channel and an RPC yrd which is broadcasted by the relay node through a channel, and performs joint decoding on the RPC symbol ysd and the RPC yrd to obtain the binary information sequence. Compared with the prior art, and according to the method of the invention, the peak signal to noise ratio of signals can be decreased through quantized compression at the relay node, a random mapping code-based receiving end link adaptive relaying strategy can be realized, and the throughput of a system can be obtained.

Description

technical field [0001] The invention relates to a cooperative communication method in wireless communication, in particular to a data transmission method based on random mapping codes in a wireless relay system. Background technique [0002] Cooperative relay transmission is one of the hot issues in the field of wireless communication in recent years. In cooperative communication, the relay channel can be said to be an auxiliary channel of the direct channel between the source node and the destination node. Through wireless relay, it can effectively resist fading, improve spectrum efficiency, enhance the reliability of wireless network, and also improve the performance of wireless network system power consumption, bit error characteristics, outage probability and coverage. In collaboration, a very critical aspect is the processing of information from source nodes by relay nodes. Different processing schemes lead to different cooperative communication protocols. [0003] Th...

Claims

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Application Information

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IPC IPC(8): H04W28/06H04W40/22H04B7/155
CPCH04B7/155H04W28/06H04W40/22
Inventor 崔浩滕姿吴俊夏鹏飞黄新林
Owner TONGJI UNIV
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