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An analysis of pilot symbol assisted modulation for Rayleigh fading channels (mobile radio)

机译:瑞利衰落信道(移动​​无线电)的导频符号辅助调制分析

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The author presents pilot-symbol-assisted modulation (PSAM) on a solid analytical basis, a feature missing from previous work. Closed-form expressions are presented for the bit error rate (BER) in binary-phase-shift-keying (BPSK) and in quadrature-phase-shift-keying (QPSK), for a tight upper bound on the symbol error rate in 16 quadrature-amplitude-modulation (16-QAM), and for the optimized receiver coefficients. The error rates obtained are lower than for differential detection for any combination of signal-to-noise ratio (SNR) and Doppler spread, and the performance is within 1 dB of a perfect reference system under slow-fading conditions and within 3 dB when the Doppler spread is 5% of the symbol rate.
机译:作者在可靠的分析基础上提出了导频符号辅助调制(PSAM),这是以前工作中所没有的功能。二进制格式的移相键控(BPSK)和正交相移的键控(QPSK)的误码率(BER)的闭式表达式为16的符号错误率提供了一个严格的上限正交幅度调制(16-QAM),以及优化的接收器系数。对于信噪比(SNR)和多普勒扩展的任何组合,获得的错误率均低于差分检测,并且在慢衰落条件下的性能在理想参考系统的1 dB以内,而在慢衰落条件下的性能在3 dB以内。多普勒扩展为符号率的5%。

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