过饱和多址系统中QPSK非相干多用户信码/相位最佳联合检测
Non-coherent multiuser weight-phase optimal joint detection in over-saturated multiple access communication
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摘要: 该文首先通过理论推导给出了过饱和多址系统中多用户信码/相位联合估计子。然后提出了低复杂度非相干多用户信码/相位最佳联合检测算法。此算法适用于具有二维星座的线性调制方式。通过计算机仿真实验,分析了此非相干最佳接收机的误码性能及相位提取误差等有关问题,并与相干最佳接收机作了比较,得出了一些有益的结论。
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关键词:
- 过饱和多址通信; 非相干检测; 相位偏差
Abstract: This paper explores the problem of non-coherent multiuser weight/phase optimal joint detection for QPSK signal in over-saturated multiple access communication. Firstly, non-coherent multiuser weight/phase estimator is given via theoretical analysis. Then, the low complexity non-coherent multiuser weight/phase optimal joint detection algorithm is proposed, which is fit with practical working-condition and is applicable to linear modulation methods with two-dimensional constellation. Finally, the performance of the non-coherent optimal receiver and the phase estimate error is analyzed via computer simulation and some useful conclusions are drawn. -
Verdu Sergio, Multiuser Detection, London, Cambridge University Press, 1998, Chapter 1. ［2］Verdu Sergio, Computational Complexity of Optimum Multiuser Detection, in Algorithrmica, New York, Springer-Verlag, 1989, Chapter 3.[2]R.E. Learned, A. S. Willsky, D. M. Boroson, Low complexity signal processing and optimal joint detection for over-saturated multiple access communications, IEEE Trans. on Signal Processing,1997, 45(1), 113-123.[3]R.E. Learned, et. al., Wavelet-packet-based multiple access communication, in SPIE on Mathematical Imaging, Wavelet Application in Signal and Image Processing, 1994, 20(7), 1236-1245. -
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