A Lattice Reduction-Based Cooperative Multiple Access Scheme

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A Lattice Reduction-Based Cooperative Multiple Access Scheme

更新时间：2025-07-09

- A Lattice Reduction-Based Cooperative Multiple Access Scheme
- Vol. 46, Issue 4, Pages: 100-105(2012)
- 作者机构：
  
  天津大学电子信息工程学院,天津,300072
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN911.22
- Online First：10 April 2012，
  
  Published：2012
- 稿件说明：
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A Lattice Reduction-Based Cooperative Multiple Access Scheme[J]. 2012, 46(4): 100-105.
DOI：

A Lattice Reduction-Based Cooperative Multiple Access Scheme[J]. 2012, 46(4): 100-105. DOI：

摘要

针对传统协作多址接入(CMA)系统可靠性不高的问题

提出了一种格约减(LR)辅助的协作多址接入方案(LR-CMA).首先将传统CMA系统中源端到目的端的信道等效成虚拟多输入多输出(MIMO)模型

然后在接收端用LR算法改善虚拟MIMO信道矩阵的正交性

减少信号之间的干扰

最后检测并恢复信号. 通过计算机仿真将LR-CMA方案与传统CMA方案相比较

结果表明

2种方案的复杂度均随维度呈指数增长

但LR-CMA方案的误码率性能要优于传统CMA方案

接近复杂度很高的最大似然检测的误码率性能

在信噪比为30 dB时

其误码率差距超过14 dB

并且LR-CMA方案在衰落信道下可以获得最优的分集增益和复用增益的均衡.

Abstract

A new cooperative multiple access scheme is proposed to improve the reliability of traditional cooperative multiple access(CMA)system. The new scheme applies lattice reduction to cooperative multiple access(CMA)system. Firstly

the channel between source and destination is equated into a virtual model with multiple inputs and multiple outputs(MIMO). The signal is processed using the LR algorithm at the destination to improve the orthogonality of channel matrix

to reduce interference

and then to be detected. Comparisons with the traditional CMA system show that the complexity of both the algorithms increases as the index is increased

but the bit error rate of LR-CMA system is better than that of the traditional CMA

and that the LR-CMA system achieves the bit error rate(BER)of maximum likelihood detection

and the BER gap outstrips 14 dB at the SNR of 30 dB. It also can get optimal diversity- multiplexing tradeoff.

关键词

Keywords

references

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