摘要
针对传统的串行干扰消除算法存在差错传播的问题,在研究经典检测改进的多载波MIMO系统联合检测算法的基础上,提出了一种基于FPGA平台技术的抑制差错传播的部分最优PSML-MMSEFOSIC检测算法。算法的主要思想是利用ML检测具有最高的可靠性,对接收信号进行分层检测,前P层采用ML检测,后N—P层主要采用OSIC检测方法,引入判决反馈的思想,验证硬判决输出是否可靠,如果不可靠,就引入候选点,重新判决,并介绍了2种约束准则。最后经过实验仿真分析,改进后的算法性能相对于一般使用的串行消除干扰检测法要更为良好,同时在控制复杂度不变的情况下,从整体上提高系统的检测性能。
In allusion to problem of the traditional serial interference cancellation algorithm with error propagation,based on combined detection of the classic study of detection of a multi carrier MIMO system to improve the algorithm,to put forward a kind of optimal PSML-MMSE-FOSIC detection method of FPGA platform technology based on error propagation suppression.The main idea of the algorithm was to use ML test with the highest reliability,the hierarchical detection signal was received before the P layer that was detected by ML,N-P layer mainly adapted the method of OSIC,the introduction of the decision feedback idea,to verify the hard decision output was reliable,if not reliable,it led to the candidate,rejudgement and introduced two kinds of constraint criterion.The smaller the threshold constraint,the constraint was more strict,the greater the probability of decision feedback,the better performance of the detection system,the simulation results to verify the performance of the improved algorithm was better than the conventional serial interference cancellation algorithm.The detection performance of the system improved without increasing the complexity obviously.
出处
《能源与环保》
2017年第11期153-157,165,共6页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
关键词
信号检测
FPGA
部分最优
干扰消除
反馈
误码率
signal detection
FPGA
partial optimization
interference cancellation
feedback
bit error rate
