As the Projection Approximation Subspace Tracking with deflation(PASTd) algorithm is sensitive to impulsive noise, an improved subspace tracking algorithm is proposed and applied to blind adaptive multi-user detection...As the Projection Approximation Subspace Tracking with deflation(PASTd) algorithm is sensitive to impulsive noise, an improved subspace tracking algorithm is proposed and applied to blind adaptive multi-user detection. Simulation results show that the improved PASTd algorithm not only remains the properties of the conventional PASTdalgorithm, but also has good Bit Error Rate(BER) performance in impulsive noise environment, thus it can effectively improve the system performance.展开更多
针对现存盲直接法码辅助技术抑制直接序列码分多址系统窄带干扰性能不佳的问题,提出盲子空间法码辅助技术及其自适应算法,实现对三类窄带干扰的抑制。对于音频干扰和数字窄带干扰,提出盲自适应带收缩的投影近似子空间跟踪(PASTd,Project...针对现存盲直接法码辅助技术抑制直接序列码分多址系统窄带干扰性能不佳的问题,提出盲子空间法码辅助技术及其自适应算法,实现对三类窄带干扰的抑制。对于音频干扰和数字窄带干扰,提出盲自适应带收缩的投影近似子空间跟踪(PASTd,Projection approximation subspace tracking with deflation)算法;对于AR随机过程,由于上述盲自适应算法的低秩判定困难,提出改进的盲自适应递归最小二乘(RLS,Recursive least square)预测-PASTd码辅助算法。仿真分析试验结果表明:该算法具有优越性。展开更多
Multiuser detection technology is currently one of the effective ways to suppress multiple access interference and near-far effects. Firstly, through selecting a simple compensation matrix, fast improved approximation...Multiuser detection technology is currently one of the effective ways to suppress multiple access interference and near-far effects. Firstly, through selecting a simple compensation matrix, fast improved approximation power iteration(FIAPI) subspace tracking optimization algorithm is proposed. Secondly, for the disadvantage of high computational complexity of Kalman filtering algorithm, Kalman for blind adaptive multiuser detector based on FIAPI subspace tracking algorithm is designed. The simulation experiments show that the convergence and anti-interference ability of the blind adaptive multiuser detector based on FIAPI algorithm is greatly improved, and the average signal-to-interference ratio of the FAPI algorithm is improved by about 0.7 dB, which is higher than the average signal-to-interference ratio of the orthogonal projection approximation subspace tracking(OPAST) algorithm 2 dB or so.展开更多
文摘As the Projection Approximation Subspace Tracking with deflation(PASTd) algorithm is sensitive to impulsive noise, an improved subspace tracking algorithm is proposed and applied to blind adaptive multi-user detection. Simulation results show that the improved PASTd algorithm not only remains the properties of the conventional PASTdalgorithm, but also has good Bit Error Rate(BER) performance in impulsive noise environment, thus it can effectively improve the system performance.
文摘针对现存盲直接法码辅助技术抑制直接序列码分多址系统窄带干扰性能不佳的问题,提出盲子空间法码辅助技术及其自适应算法,实现对三类窄带干扰的抑制。对于音频干扰和数字窄带干扰,提出盲自适应带收缩的投影近似子空间跟踪(PASTd,Projection approximation subspace tracking with deflation)算法;对于AR随机过程,由于上述盲自适应算法的低秩判定困难,提出改进的盲自适应递归最小二乘(RLS,Recursive least square)预测-PASTd码辅助算法。仿真分析试验结果表明:该算法具有优越性。
基金Supported by the National Natural Science Foundation of China(61671333).
文摘Multiuser detection technology is currently one of the effective ways to suppress multiple access interference and near-far effects. Firstly, through selecting a simple compensation matrix, fast improved approximation power iteration(FIAPI) subspace tracking optimization algorithm is proposed. Secondly, for the disadvantage of high computational complexity of Kalman filtering algorithm, Kalman for blind adaptive multiuser detector based on FIAPI subspace tracking algorithm is designed. The simulation experiments show that the convergence and anti-interference ability of the blind adaptive multiuser detector based on FIAPI algorithm is greatly improved, and the average signal-to-interference ratio of the FAPI algorithm is improved by about 0.7 dB, which is higher than the average signal-to-interference ratio of the orthogonal projection approximation subspace tracking(OPAST) algorithm 2 dB or so.
