Second-Order LMS Based Per-Survivor Processing Decoder for Space-Time Trellis Code |
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Authors: | Xue Yisheng Zhu Xuelong |
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Affiliation: | (1) Dept. Electronic Engineering, Tsinghua University, Beijing, P.R. China |
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Abstract: | An adaptive space-time trellis code (STTC) decoder with thesecond-order LMS (SOLMS) based channel tracking is studied in thispaper. We first show that per-survivor processing (PSP) can beadopted as the approximation of the adaptive maximum likelihoodsequence detection (MLSD) of STTC when there are no periodicallyinserted orthogonal pilot sequences (PIOPS). With thispresupposition, we propose a new decoder for STTC, called SOLMSbased PSP decoder, in which we use min-max optimum SOLMSalgorithm for channel tracking when some ``boundary' statisticalknowledge of the fading channel is available. Intensive computersimulations have been done to compare the performance of theproposed decoder with other known decoding methods as applied tolong burst transmissions. |
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Keywords: | space-time trellis code per-survivor processing second-order LMS algorithm min-max optimum |
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