A modified transposed Farrow solution to multipurpose multirate filtering in software defined radio (SDR)

How to implement multi-purpose filtering with high flexibility and low cost is one of the biggest challenges for SDR receiver design. Recently proposed transposed Farrow structure is the most competitive candidate for this purpose. However the existing transposed Farrow structure faces the problem of timing control in the output sample, which seriously limits its potential applications. In this paper, an efficient modified transposed Farrow structure is implemented. Its efficiency is verified by comparing it with the method existing in the literature. The analysis and simulation results clearly show that the proposed solution removes the obstacle in the implementation of transposed Farrow structure, which may lead to its potential extensive applications in SDR systems.