Design of signal shaping filter based on distributed algorithm

Abstract

In this paper, a shaping filter based on distributed algorithm is proposed for baseband signal shaping filter in the process of signal modulation. The paper first introduces the process of signal modulation, then analyzes the shaping filter principle of the traditional multiplier structure, and then proposes a distributed algorithm to replace the traditional multiplier structure. In the distributed algorithm, the filter coefficients generated by MATLAB are first stored in BRAM by using LUT lookup table, and then the addressing method is used to replace the accumulation method to realize the shaping filter. The experimental results show that the improved structure can significantly reduce the resource occupation in FPGA, and also has a good filtering result. The distributed algorithm has a good application in the high order shaping filter.