基于改进LLL规约的MIMO系统解码算法

发布时间：2018-02-08 08:32

本文关键词： 多输入多输出格基规约 LLL Gram-Schmidt正交化　出处：《舰船电子工程》2016年12期 　论文类型：期刊论文

【摘要】：LLL算法是一种经典的格基规约算法,它广泛应用于MIMO通信系统的线性接收机中。LLL算法依赖于Gram-Schmidt正交化算法,这种算法按照增益矩阵中向量的初始顺序产生正交基。论文提出一种排序Gram-Schmidt正交化算法,这种算法可以产生更短的正交基。然后在LLL算法中,用排序Gram-Schmidt正交化算法代替原正交化,以改进规约算法的性能。在仿真实验中,比较了论文提出的改进LLL算法、LLL算法和排序QR分解算法的解码性能。结果显示本文提出的方法误码率(BER)最低。
[Abstract]:LLL algorithm is a classical lattice-base protocol algorithm. It is widely used in linear receiver of MIMO communication system. LLL algorithm depends on Gram-Schmidt orthogonalization algorithm. This algorithm generates orthogonal bases according to the initial order of vectors in the gain matrix. In this paper, a sorting Gram-Schmidt orthogonalization algorithm is proposed, which can produce a shorter orthogonal basis. Then, in the LLL algorithm, In order to improve the performance of the protocol algorithm, the sorting Gram-Schmidt orthogonalization algorithm is used instead of the original orthogonalization algorithm. The decoding performance of the improved LLL algorithm and the sorting QR decomposition algorithm is compared. The results show that the proposed method has the lowest bit error rate (BER).
【作者单位】： 91919部队;
【基金】：国家自然科学基金项目(编号:41504029)资助
【分类号】：TN919.3

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