Optimised MLSE equaliser for fast channel tracking and reliable decoding when using space time DPSK block codes for future WPAN

The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring. Pub Date : 2003-04-22 DOI:10.1109/VETECS.2003.1208854

Rafael Cepeda, D. Gargin, Michael Philip Fitton, C. Leong

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引用次数: 1

Abstract

Communication systems which work in excess of, but close to, the channel's coherent bandwidth are expected to have a small number of significant components in their channel's impulse response which causes inter-symbol interference (ISI). Also, for a packet based system, if the channel presents variations during packet transmission, the system can be driven to a high error floor reducing data throughput. The proposed solution uses an optimised maximum likelihood sequence estimator (MLSE) equaliser in conjunction with a space-time block code (STBC) multiple antenna system that works under all the mentioned factors without a considerable increase in complexity but with a high level of flexibility. The optimised MLSE equaliser showed a considerable increment in data throughput for the system under test when using the differential phase shift keying modulation schemes /spl pi//2 DBPSK, /spl pi//4 DQPSK and 8-DPSK. It is proposed that this approach be adopted for short range, ad hoc, wireless personal area networks (WPAN).

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优化的MLSE均衡器，用于快速信道跟踪和可靠解码，当使用空时DPSK块码用于未来的WPAN

工作在超过但接近信道相干带宽的通信系统，其信道的脉冲响应中会有少量的重要分量，这些分量会引起码间干扰(ISI)。此外，对于基于分组的系统，如果在分组传输期间通道出现变化，则系统可以被驱动到一个高错误层，从而降低数据吞吐量。提出的解决方案使用优化的最大似然序列估计器(MLSE)均衡器与空时分组码(STBC)多天线系统相结合，该系统在所有上述因素下工作，而不会显着增加复杂性，但具有高度的灵活性。当使用差分相移键控调制方案/spl pi//2 DBPSK、/spl pi//4 DQPSK和8-DPSK时，优化后的MLSE均衡器显示出被测系统的数据吞吐量有相当大的增加。提出了在短距离、自组网、无线个人区域网络(WPAN)中采用这种方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring.

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