一种低复杂度的空时多用户迭代检测方案

杜娜; 徐大专

doi:10.3724/SP.J.1146.2007.01446

一种低复杂度的空时多用户迭代检测方案

doi: 10.3724/SP.J.1146.2007.01446

杜娜,
徐大专

基金项目:

移动通信国家重点实验室开放基金(N200502)和江苏省自然科学基金项目(BK2007192)资助课题

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出版历程
- 收稿日期: 2007-09-11
- 修回日期: 2008-10-20
- 刊出日期: 2009-02-19

A Low Complexity Scheme for Space-Time Multi-user Iterative Detection

Du Na,
Xu Da-zhuan

摘要

摘要: 该文针对已有的对多用户空时编码系统的研究大都集中在多用户STTC和STBC方案，提出一种联合Turbo-BLAST的多用户空时方案。在接收端，针对传统的基于符号干扰抵消(Symbol-Level Cancellation, SLC)与检测的迭代接收机复杂度仍然较高的前提下，提出一种低复杂度的基于比特级干扰抵消(Bit-Level Cancellation, BLC)的迭代检测方案。该方案在检测部分将M-QAM调制符号分解成为一系列的BPSK符号的线性组合，采用比特级的干扰抵消。理论分析和仿真结果表明，该文提出的方案在保持BLAST高频谱效率的同时，与传统检测方案相比，在不降低系统性能的前提下，计算复杂度得到了很大程度的降低。
- 空时处理;Turbo-BLAST;迭代接收机;软干扰抵消;比特级干扰抵消
Abstract: In multiuser space-time coding system the research already made is almost focused on STTC and STBC scheme. For this reason, a multiuser space-time coding system combined with Turbo-BLAST scheme is proposed. The conventional iterative receiver with Symbol-Level Cancellation (SLC) and detection still has a high computation complexity, so a low complexity iterative receiver scheme with Bit-Level Cancellation (BLC) and detection is proposed which can performs bit-level cancellation by decomposing of an M-QAM constellation into a linear combination of binary constellations. Theoretic analysis and simulation results show that the proposed scheme has a low complexity with no performance degradation compared with conventional iterative receiver, while the high spectral efficiency of the system from BLAST is retained.

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参考文献(1)

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