| 摘要: |
| 排序串行干扰消除（Ordered Successive Interference Cancellation，OSIC）是多输入多输出无线通信系统中一种重要的信号检测技术。为了降低该算法的计算复杂度，首先提出了基于信号可靠性判决的排序串行干扰消除算法，根据所设计的信号可靠性判决（Signal Reliability Decision，SRD）结构的判决结果选择不同的方法消除信号间的干扰。为了进一步提升SRD-OSIC算法的检测性能，提出了局部最优（Local Optimized,LO）的LO-SRD-OSIC算法。仿真结果表明，SRD-OSIC算法仅需要传统OSIC算法一半的复杂度就能获得相近的误码率性能。不仅如此，当LO-SRD-OSIC算法与SRD-OSIC算法的计算复杂度相同时,LO-SRD-OSIC算法可以获得额外3 dB的误码率性能增益。 |
| 关键词: 多输入多输出 信号检测 排序串行干扰消除 可靠性判定结构 |
| DOI： |
|
| 基金项目:国家自然科学基金资助项目（61501244，61501245） |
|
| Ordered Successive Interference Cancellation and Detection Based on Signal Reliability Decision Structure in MIMO Systems |
| FENG Jiao,HU Dongshun,LI Peng |
| (School of Electronic & Information Engineering,Nanjing University of Information Science & Technology,Nanjing 210044,China) |
| Abstract: |
| The ordered successive interference cancellation(OSIC) algorithm is an important signal detection technique employed by the receiver of the multiple-input multiple-output(MIMO) based communication systems.In order to reduce the computational complexity of the OSIC algorithm,this paper first proposes a signal reliability decision - ordered successive interference cancellation(SRD-OSIC) algorithm,which selects different methods to eliminate the interference,according to the output of the designed signal reliability decision(SRD) structure.In order to further improve the detection performance of the SRD-OSIC algorithm,this paper proposes the local optimal - signal reliability decision - constellation candidate selective constraint(LO-SRD-OSIC) algorithm.The simulation results show that the SSRD-OSIC algorithm is capable of reducing the computational complexity of the OSIC algorithm by 50% when both SRD-OSIC and the OSIC algorithm achieve the same bit error rate(BER).When the computational complexity of the LO-SRD-OSIC algorithm is similar to that of the SRD-OSIC algorithm,the LO-SRD-OSIC algorithm can obtain an additional 3 dB performance gain. |
| Key words: MIMO signal detection ordered successive interference cancellation signal reliability decision structure |
