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采用极短脉冲传播信息对脉冲超宽带系统的同步性能要求极高,特别是采用RAKE接收机时,一个微小的定时抖动可能会引起系统性能严重下降。为了降低系统对同步性能的要求并提高系统的稳定性,提出了一种基于模板修正的抑制超宽带系统定时抖动的方法(Suppression Timing-jitter based on Modified Template,STMT),给出了具体的模板修正工作流程及系统实现方案框图。该方法无需重新设计发射信号波形,降低了系统设计的难度,保证了系统的传输速率。同时对接收端的改动较少,无需进行大量的迭代运算和复杂的信号处理。在提高系统定时抖动抑制作用的同时,该方案并未引入过多的系统复杂度,更利于系统实现。理论证明了该方法是最优接收机理论的扩展,利用仿真验证并分析了该方法在抑制系统时延抖动方面的正确性与有效性。
The use of very short pulse propagation information imposes extremely high demands on the synchronization performance of pulsed UWB systems, especially with the RAKE receiver, a small timing jitter may cause serious degradation of system performance. In order to reduce the requirement of the system for the synchronization performance and improve the system stability, a Suppression Timing-jitter based on Modified Template (STMT) method based on template correction is proposed. The specific template Correct workflow and system implementation of the program block diagram. The method does not need to re-design the transmitted signal waveform, which reduces the difficulty of the system design and ensures the transmission speed of the system. At the same time less changes to the receiver, without a lot of iterative computing and complex signal processing. While improving the system timing jitter suppression, this scheme does not introduce excessive system complexity, which is more conducive to system implementation. The theory proves that this method is an extension of the optimal receiver theory. The correctness and validity of this method in suppressing the system delay jitter are verified and analyzed.