Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/46799
標題: Adaptive DS-CDMA receiver with code tracking in phase unknown environments
作者: Ueng, F.B.
翁芳標
Chen, J.D.
Tsai, S.C.
關鍵字: DS-CDMA
code tracking
decision-feedback differential detection
spread-spectrum signals
fading channels
interference suppression
systems
equalization
filter
delay
期刊/報告no:: Ieee Transactions on Wireless Communications, Volume 7, Issue 4, Page(s) 1227-1235.
摘要: In this paper, we propose and analyze a new noncoherent receiver with PN code tracking for direct sequence code division multiple access (DS.-CDMA) communication systems in multipath channels. We employ the decision-feedback differential detection method to detect MDPSK signals. An "error signal" is used to update the tap weights and the estimated code delay. Increasing the number of feedback symbols can improve the performance of the proposed noncoherent receiver. For an infinite number of feedback symbols, the optimum weight can be derived analytically, and the performance of the proposed noncoherent receiver approaches to that of the conventional coherent receiver. Simulations show good agreement with the theoretical derivation.
URI: http://hdl.handle.net/11455/46799
ISSN: 1536-1276
文章連結: http://dx.doi.org/10.1109/twc.2008.060803
Appears in Collections:通訊工程研究所

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