V-BLAST結合平行干擾消除的模擬效能

Simulation Performance of V-BLAST followed by Parallel Interference Cancellation

黃耀民(Yao-Min Huang)

指導教授 ： 曾恕銘

國立臺北科技大學/電資學院/電腦與通訊研究所/碩士(2007年)

摘要

比較Vertical Bell Labs Layered Space-Time (V-BLAST), sorted-QR decomposed (SQRD) successive interference cancellation (SQRD-SIC)可以降低複雜度而且效能和V-BLAST一樣。在這篇論文中，我們在Multi-Input Multi-Output (MIMO)系統中提出SQRD-SIC結合平行多階級偵測技術 (PIC) 來改善系統的效能。
平行多階級的偵測技術由二階級或是更多階級組成，第一階級偵測比較精確，之後第二階可以重新偵測。我們使用SQRD-SIC當作第一階級，之後我們多工的PIC並且有可適性的權重給平行偵測器。在第一階級的PIC，利用SQRD-SIC每一個substream的平均正確機率當作可適性PIC消除的權重。
模擬結果顯示，本論文提出方法的符號錯誤率比SQRD結合完全平行的干擾消除偵測和固定權重平行技術的干擾消除偵測較好。

關鍵字

V-BLAST ； MIMO ； SQRD ； 平行干擾消除

並列摘要

Compared to V-BLAST, sorted-QR decomposed successive interference cancellation (SQRD-SIC) has reduced complexity and similar performance. We propose SQRD-SIC followed by multistage parallel interference detection (PIC) for multi-input multi-output (MIMO) system to improved performance.
The parallel detector consists of two or more stages, the first stage give a precise estimate of the substreams and the second stage refines this estimate. We use SQRD-SIC for the first stage, then we use with adaptive partial weighting for parallel detector. At the first PIC stage, we use the average correct probability for each substream of the SQRD-SIC (previous stage) as the adaptive PIC cancellation weights.
The simulation results show the uncoded error probability of our proposed method is better than that of SQRD-SIC followed by parallel multistage detection schemes.

並列關鍵字

V-BLAST ； MIMO ； SQRD ； Parallel Interference Cancellation

參考文獻

[1] G. J. Foschini, “Layered space-time architecture for wireless communication in a fading environment when using multiple antennas,” Bell Labs. Tech. J., vol. 1, no. 2, pp. 41-59, Autumn 1996.

[2] G. G. Rayleigh and J. M. Cioffi, “Spatio-temporal coding for wireless communication,” IEEE Trans. Commun., vol. 46, no. 3, pp. 357-366, Mar. 1998.

[3] G. J. Foschini, “On limits of wireless communication in a fading environment when using multiple antennas,” Wireless Pers. Commun., vol. 6, no. 3, pp. 311- 335, 1998.

[4] P. W. Wolniansky, G. J. Foschini, G. D. Golden, and R. A. Valenzuela, “V-BLAST: An architecture for realizing very high data rates over the rich-scattering wireless channel,” in Proc. URSI Int. Symp. Signals, Syst., Electron., pp. 295-300, Sep. 1998.

[6] W. H. Chin, A. G. Constantinides, and D. B. Ward, “Parallel multistage detection for multiple antenna wireless systems,” Electron. Lett., vol. 38, pp. 597-599, Jun. 2002.