Non-Cancellation Multistage Kurtosis Maximization with Prewhitening for Blind Source Separation

預白化非消除多階段峰度最大化之盲蔽信號源分離法

黃俊華(Chon-Wa Wong)

指導教授 ： 祁忠勇

國立清華大學/電機資訊學院/通訊工程研究所/碩士(2008年)

摘要

Chi et al. recently proposed two effective non-cancellation multistage (NCMS) blind source separation algorithms, one using the turbo source extraction algorithm (TSEA), called the NCMS-TSEA, and the other using the fast kurtosis maximization algorithm (FKMA), called the NCMS-FKMA. Their computational complexity and performance heavily depend on the dimension of multi-sensor data, i.e., number of sensors. This thesis proposes the inclusion of the prewhitening processing in the NCMS-TSEA and NCMS-FKMA before performing source extraction. We come up with two improved algorithms, referred to as PNCMS-TSEA and PNCMS-FKMA with significant computational savings on one hand, and some performance improvements on the other hand (owing to dimension reduction and noise reduction by prewhitening processing), especially when the number of sensors is much larger than the number of sources. Two implementation structures for the proposed PNCMS-TSEA and PNCMS-FKMA are considered. One is parallel structure (denoted as PNCMS-TSEA(p) and PNCMS-FKMA(p)) and the other is sequential structure (denoted as PNCMS-TSEA(s) and PNCMS-FKMA(s)). The performances of PNCMS-TSEA(p) (PNCMS-FKMA(p)) and PNCMS-TSEA(s) (PNCMS-FKMA(s)) are the same while the former is well suited to software and hardware implementations thanks to much smaller processing latency. Some simulation results are presented to verify the efficacy and computational efficiency of the proposed algorithms.

關鍵字

峰度最大化 ； 預白化 ； 盲蔽信號源分離 ； 非消除多階段 ； HASH(0x1d4c3a70) ； HASH(0x1d4c3b10) ； HASH(0x1d4c3bb0) ； HASH(0x1d4c3c50)

並列摘要

HASH(0x1d4c9070)

並列關鍵字

blind source separation ； BSS ； TSEA ； FKMA ； NCMS-TSEA ； NCMS-FKMA ； PNCMS-TSEA ； PNCMS-FKMA

參考文獻

[6] L. Tong, R.-W. Liu, V. C. Soon, and Y.-F. Huang,

[15] C.-Y. Chi, C.-Y. Chen, C.-H. Chen, and C.-C. Feng,

[23] C.-Y. Chi, C.-C. Feng, C.-H. Chen, and C.-Y. Chen,

[3] C. Chang, Z. Ding, S. F. Yau, and F. H. Y. Chan,

[1] A. Belouchrani, K. Abed-Meraim, J.-F. Cardoso, and E. Moulines, "A blind source separation technique using second-order statistics," IEEE Transactions on Signal Processing, vol. 45, no. 2, pp. 434-444, Feb. 1997.