使用Schmidl&Cox算法实现系统符号同步，在理想信道、CM1-4(UWB信道的四种经典模型)和AWGN信道下分别进行了仿真。-Schmidl &Cox algorithm is Used for symbol synchronization , in ideal channel, CM1-4 (four classic UWB channel model) and AWGN channel.And we can analyse qualities of these channels.