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V-BLAST系統(tǒng)中采用發(fā)射功率分配的MMSE迭代軟干擾抵消算法

唐萬斌 張亮 李少謙

唐萬斌, 張亮, 李少謙. V-BLAST系統(tǒng)中采用發(fā)射功率分配的MMSE迭代軟干擾抵消算法[J]. 電子與信息學(xué)報(bào), 2006, 28(9): 1640-1644.
引用本文: 唐萬斌, 張亮, 李少謙. V-BLAST系統(tǒng)中采用發(fā)射功率分配的MMSE迭代軟干擾抵消算法[J]. 電子與信息學(xué)報(bào), 2006, 28(9): 1640-1644.
Tang Wan-bin, Zhang Liang, Li Shao-qian. MMSE Iterative Soft Interference Cancellation Algorithm Using Transmit Power Allocation Scheme in V-BLAST System[J]. Journal of Electronics & Information Technology, 2006, 28(9): 1640-1644.
Citation: Tang Wan-bin, Zhang Liang, Li Shao-qian. MMSE Iterative Soft Interference Cancellation Algorithm Using Transmit Power Allocation Scheme in V-BLAST System[J]. Journal of Electronics & Information Technology, 2006, 28(9): 1640-1644.

V-BLAST系統(tǒng)中采用發(fā)射功率分配的MMSE迭代軟干擾抵消算法

MMSE Iterative Soft Interference Cancellation Algorithm Using Transmit Power Allocation Scheme in V-BLAST System

  • 摘要: 作為一種軟輸入軟輸出的MIMO檢測算法,MMSE迭代軟干擾抵消算法在MIMO Turbo接收機(jī)中得到廣泛的關(guān)注。為了進(jìn)一步改善系統(tǒng)性能,采用鏈路自適應(yīng)方案是很好的選擇。該文給出變發(fā)射功率的MMSE迭代軟干擾抵消算法,并采用了一種有效的發(fā)射功率分配方案,只需要很少的控制信令,就可以獲得較大的誤碼率性能改善。通過沒有信道編譯碼的鏈路仿真,在4發(fā)4收QPSK調(diào)制的V-BLAST系統(tǒng)中,如果誤碼率要求為BER=10-3,MMSE迭代軟干擾抵消檢測算法迭代次數(shù)為2時,采用推薦的發(fā)射功率分配方案比不采用發(fā)射功率分配方案的系統(tǒng)性能提高了約2dB,如果調(diào)制方式為16QAM,系統(tǒng)性能提高了約6dB。
  • Foschini G J, Gans M J. On limits of wireless communications in a fading environment when using multiple antennas. Wireless Personal Communication, 1998, 6(5): 315-335.[2]Tarokh V, Naguib A, Seshadri N. Combined array processing and space-time coding[J].IEEE Trans. on Information Theory.1999, 45(5):1121-1128[3]Raleigh G G, Cioffi J M. Spatio-temporal coding for wireless communication[J].IEEE Trans. on Communications.1998, 46(3):357-366[4]Wolniansky P W, Foschini G J, Golden G D, et al.. V-BLAST: An architecture for realizing very high data rates over the rich-scattering wireless channel. Proceedings of the URSI International Symposium on Signals, Systems and Electronics, Pisa, Italy, Sept.-Oct. 1998: 295-300.[5]Arogyaswami Paulraj, Rohit Nabar, Dhananjay Gore. Introduction to Space-Time Wireless Communications. United Kingdom: Cambridge University Press, 2003: 121-235.[6]Golden G D, Foschini C J, Valenzuela R A, et al.. Detection algorithm and initial laboratory results using V-BLAST space-time communication architecture[J].Electronics Letters.1999, 35(1):14-16[7]Takumi Ito, Wang Xiaodong, Kakura Yoshikazu, et al.. Performance comparison of MF and MMSE combined iterative soft interference canceller and V-BLAST technique in MIMO/OFDM systems. IEEE Vehicular Technology Conference 2003 Fall, 2003, 1: 488-492.[8]Wautelet Xavier, Dejonghe Antoine, Vandendorpe Luc. MMSE-based fractional Turbo receiver for space-time BICM over frequency-selective MIMO fading channels[J].IEEE Trans. on Signal Processing.2004, 52(6):1804-1809[9]Sellathurai Mathini, Haykin Simon. Turbo-BLAST for wireless communications: Theory and experiments[J].IEEE Trans. on Signal Processing.2002, 50(10):2538-2546[10]Goldsmith A J, Varaiya P. Capacity of fading channels with channel side information[J].IEEE Trans. on Information Theory.1997, 43(11):1986-1992[11]Chung S T, Goldsmith A J. Degrees of freedom in adaptivemodulation: a unified view[J].IEEE Trans. on Communications.2001, 49(12):1561-1571[12]Nam S H, Shin O S, Lee K B. Transmit power allocation for a modified V-BLAST system. IEEE Trans. on Communications. 2004, 52(7): 1074-1079.
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  • 收稿日期:  2004-12-17
  • 修回日期:  2005-08-04
  • 刊出日期:  2006-09-19

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