Optimized multistandard RF subsampling radio receiver design

This paper presents an improved topology design at RF system architecture level for multi-standard radio receiver based on RF subsampling technique. By limiting downconversion to IF domain, a single path for RF signal analogue processing is used avoiding circuit complexities and allowing software-based IF processing in DSP stage. This ensures required configurability for multimode operation with high-level integration. This work is also addressing the choice of sampling frequency for the track and hold circuit control by considering aliasing and noise constraints. Simulation results of optimized sampling frequency are presented for a multi-standard radio receiver designed for GSM, UMTS and IEEE-802.11g.