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Combined Signal Detection Method in Differential Frequency Hopping System(PDF)

Transactions of Tianjin University[ISSN:1006-4982/CN:12-1248/T]

Issue:
2007年03期
Page:
215-219
Publishing date:

Info

Title:
Combined Signal Detection Method in Differential Frequency Hopping System
Author(s):
YAN Lei1 HOU Chunping1 DAI Jufeng1 ZHANG Ping2
1.School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China; 2. Fujian Telecom, Fuzhou 350001, China
Keywords:
DOI:

Abstract:
In order to enhance communication reliability of differential frequency hopping system, a receiver implemented with the concatenation of an optimal subblock-by-subblock maximum a posteriori probability (OBB-MAP) detector and a soft-decision Turbo decoder is proposed and validated in both AWGN and Rayleigh flat fading channels. It is shown that the OBB-MAP decoder can iteratively decode a cyclic trellis, and back-search the trellis for any state to obtain estimates for the prior information bits which can be employed by soft-decision Turbo decoder. The proposed receiver achieves a better bit error rate(BER) performance than maximum likelihood sequence estimation(MLSE) detector employing Viterbi algorithm. The simulation results demonstrate that the combined signal detection method improves communication quality.

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Last Update: 2011-05-02