過飽和多址系統(tǒng)中QPSK非相干多用戶信碼/相位最佳聯(lián)合檢測
Non-coherent multiuser weight-phase optimal joint detection in over-saturated multiple access communication
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摘要: 該文首先通過理論推導(dǎo)給出了過飽和多址系統(tǒng)中多用戶信碼/相位聯(lián)合估計子。然后提出了低復(fù)雜度非相干多用戶信碼/相位最佳聯(lián)合檢測算法。此算法適用于具有二維星座的線性調(diào)制方式。通過計算機(jī)仿真實(shí)驗(yàn),分析了此非相干最佳接收機(jī)的誤碼性能及相位提取誤差等有關(guān)問題,并與相干最佳接收機(jī)作了比較,得出了一些有益的結(jié)論。
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關(guān)鍵詞:
- 過飽和多址通信; 非相干檢測; 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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