基于抽取滤波器多相分解的多速率采样模块设计

针对扩频系统中多速率采样的实现问题，提出了一种改进的多相滤波器结构. 通过简单的多相内插之后，进行分数倍抽取，可完成任意比重采样变换. 介绍了基于多相滤波器结构的重采样原理，给出了适宜硬件实现的架构. 仿真结果表明，该方法在极大降低系统运算量和开销的前提下，并不影响系统的性能. 

Multi-Rate Sampling Design Based on Polyphase Decomposition of Decimation Filter

Aiming at the problem of multi-rate sampling in spread spectrum systems, proposed an improved polyphase filter structure. Resampling transform can be completed in any proportion by the simple multiphase interpolation and the fractional extraction. Introduced the principle of resampling based on polyphase filter structure, proposed the architecture suitable for hardware implementation. The simulation results show that this method greatly reduces the amount of computation and overhead of the system under the premise of not affecting the performance of the system.