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首页> 外文期刊>IEEE Transactions on Vehicular Technology >On RAKE Receivers for Ultra-Wideband Binary Block-Coded PPM in Dense Multipath Channels
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On RAKE Receivers for Ultra-Wideband Binary Block-Coded PPM in Dense Multipath Channels

机译：密集多径信道中用于超宽带二进制块编码PPM的RAKE接收器

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摘要

Ultra-wideband communications with a balanced orthogonal binary block-coded pulse-position-modulation scheme are considered over dense multipath channels. The structure and the performance of all-RAKE (A-RAKE) and selective-RAKE (S-RAKE) receivers are studied under the minimum bit-error rate (MBER), the maximum signal-to-noise ratio (MSNR), and the maximum-energy-capture (MEC) criteria. For the A-RAKE reception, the amount of the pulse-position shift is identified as the key design parameter that significantly affects the BER performance of the MBER and, equivalently, the MSNR receivers. It is also shown that the amount of energy capture does not well characterize the BER performance of the RAKE receiver in a very dense multipath channel. For the S-RAKE reception, although suboptimal, the RAKE receivers that allow template-matched filtering are mainly studied. The condition for the equivalence of the MSNR S-RAKE receiver to the MEC S-RAKE receiver is derived. It is shown that the amount of the pulse-position shift is again the key design parameter that determines whether the MSNR S-RAKE receiver is equivalent to the MBER S-RAKE receiver. Various schemes for finger-location selection are also studied, and a heuristic selection scheme is proposed for digital implementation of the RAKE receivers.
机译：在密集的多径信道上考虑了具有平衡正交二进制块编码脉冲位置调制方案的超宽带通信。研究了全瑞克（A-RAKE）和选择性瑞克（S-RAKE）接收机的结构和性能，方法是在最小误码率（MBER），最大信噪比（MSNR）和最大能量捕获（MEC）标准。对于A-RAKE接收，脉冲位置偏移量被确定为关键设计参数，该参数显着影响MBER和等效地MSNR接收器的BER性能。还表明，能量捕获量不能很好地表征非常密集的多径信道中RAKE接收机的BER性能。对于S-RAKE接收，虽然次优，但主要研究允许模板匹配滤波的RAKE接收器。推导了MSNR S-RAKE接收机与MEC S-RAKE接收机等效的条件。可以看出，脉冲位置偏移量再次是决定MSNR S-RAKE接收机是否等效于MBER S-RAKE接收机的关键设计参数。还研究了用于手指位置选择的各种方案，并且提出了启发式选择方案以用于RAKE接收机的数字实现。

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