脉冲无线电通信系统的正交锁相环路同步方法

Timing Acquisition of Impulse Radio System with Orthogonal Analog Phase Lock Loop

使用正交模拟锁相环路对无载波的脉冲无线电系统实现多径捕获和同步提取。首先给出脉冲信号在正交正弦信号分解的结果特性,得出锁相接收的可能性。然后给出了使用正交模拟锁相环路实现多径捕获和同步提取的方法和步骤,讨论了锁相环路的性能和关键参数,给出了在实际信道数据下的模拟结果。结果表明该方法优于现有的多径捕获和同步方法,且结构简单易于实现。

The orthogonal analog phase lock loop is used to get the timing information ot the impulse radio system and the multi-path component separation. Firstly, the principle of the orthogonal pulse decomposition with two orthogonal sinusoidal waveforms is given. Then the multi-path capture and the timing acquisition are provided, and the critical parameter and the performance of the phase lock loop are discussed. Simulation shows that the performance of the algorithm is better than that of the multi-path detection and the timing acquisition methods. So its structure is easy to be implemented.