带时间偏移误差和未知信道的UWB信号联合估计与检测

Lei Feng, W. Namgoong
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引用次数: 6

摘要

提出了一种在信道未知、收发时钟不同步的情况下对接收信号进行联合估计和检测的超宽带接收机。而不是使用RAKE接收器,这需要接收到的单周期的知识,整个接收器脉冲直接估计。通过将每帧中的时变脉冲样本表示为固定模板脉冲的插值版本,可以使用扩展卡尔曼滤波器(EKF)来估计信道和时间偏移。由于EKF计算量大,本文还提出了一种性能损失可忽略的简化EKF。EKF与每个幸存者处理(PSP)单元联合工作以检测接收到的信号。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Joint estimation and detection of UWB signals with timing offset error and unknown channel
An ultra-wideband (UWB) receiver that jointly estimates and detects the received signal when the channel is unknown and the transmitter and receiver clocks are not synchronized is presented. Instead of using a RAKE receiver, which requires knowledge of the received monocycle, the entire receiver pulse is estimated directly. By formulating the time-varying pulse samples in each frame as the interpolated versions of a fixed template pulse, an extended Kalman filter (EKF) can be used to estimate the channel and the timing off-set. Because the EKF is computationally demanding, a simplified EKF with negligible loss in performance is also proposed. The EKF operates jointly with a per-survivor processing (PSP) unit to detect the received signal.
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