一种新的盲空时多用户接收机及其改进形式
New Blind Space-Time Multiuser Receiver and Its Improved Method
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摘要: 该文对空时多用户接收机提出了变步长LMS盲自适应算法,该算法提出了一种新的双误差函数来解决系统的约束优化问题。进一步地,考虑到用户信号多径衰落的特点,提出一种新标准对目标用户多径传输信号进行预选择,从而在降低系统的运行成本与维持系统的性能之间找到一种新的折衷途径。仿真结果证明了上述算法的有效性。
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关键词:
- 多径衰落; 多用户检测; 空时处理
Abstract: In the paper, a varied step length LMS algorithm is adopted in space-time multiuser receiver, in which a new bierror function is used to solve the constrained optimization problem. Furthermore, based on the character of the users signals in fading channels, a new standard is presented to filter the users signals in advance. The method will reduce the running cost of the system greatly and present a new controllable tread of f means between the system performance and its running cost. The above algorithm is verified by the following simulations. -
Verdu S. Multiuser Detection. Cambridge, UK Cambridge Univ.Press, 1998, chapter 1.[2]Wang Xiaodong, Poor H V. Blind adaptive multiuser detection in multipath CDMA channel based on subspace tracking[J].IEEE Trans. on SP.1998, 46(11):3030-[3]Miller S, Schwartz S C. Integrated spatial-temporal detectors for asynchronous Gaussian multiple access channels. IEEE Trans. on Commun., 1995, COM-43(234): 396 - 411.[4]Wang Xiaodong, Poor H V. Space-time multiuser detection in multipath CDMA channels[J].IEEE Trans. on SP.1999, 47(9):2356-[5]Honing M, Madhow U, Verdu S. Blind adaptive multiuser detection[J].IEEE Trans. on IT.1995, 41(7):944-[6]Xie Z, Short R T, Rushforth C K. A family of suboptimum detectors for coherent multiuser communications[J].IEEE J. on Select. Areas Commun.1990, 8(4):683-[7]Haykin S. Adaptive Filter Theory. Prentice Hall Inc, 1996, chapter 9.[8]Yang B. Projection approximation subspace tracking[J].IEEE Trans. on SP.1995, 43(1):95- -
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