一种具有任意倍升采样的高速率脉冲成型算法

A new high-speed pulse shaping algorithm with arbitrary up-sampling rate

摘要:

针对高速数字通信系统中实现任意倍采样率的信号脉冲成型滤波问题,文章提出一种基于查找表思想的可灵活改变采样率的高速通用实现算法．该算法采用FIR滤波器结构,通过将不同采样率转换映射为对查找表地址的寻址问题,实现一定范围内的任意倍采样率的灵活变换;同时结合流水线结构和改进的全并行分布式算法,实现高速率脉冲成型滤波功能,并在硬件平台上进行验证．所提算法具有占用资源低、实现速率高、性能稳定、且可在一定范围实现任意倍可变采样率的特点．

Abstract:

To solve the problem of pulse shaping with arbitrary up-sampling rate in the high speed digital communication system, a new general high-speed algorithm based on look-up table is proposed, which can flexibly change sample rate. The algorithm uses FIR filter structure to realize arbitrary and flexible up-sampling rate conversion within in a range, by mapping different sample-rate conversion to the address problemof look-up table. Meanwhile, the proposed algorithm combining with pipeline structure and improved full parallel distributed arithmetic (DA) realizes the pulse shaping filter function at high speed, which is also validated through hardware platform. The proposed algorithm not only occupies less resource, but also implements at high speed with strong stability. In addition, the algorithm can flexibly realize arbitrary up-sampling rate conversion within a range.