Reconfigurable low complexity digital filter banks for software radio receivers

Abstract

Software Defined Radio (SDR) is a technology thought to build flexible radio systems, multi-service, multi-standard, multi-band, reconfigurable and reprogrammable by software. The fundamental idea of SDR is to replace most of the analog signal processing in the transceivers with digital signal processing in order to provide the advantage of flexibility through reconfiguration. This will enable different air-interfaces to be implemented on a single generic hardware platform. The most computationally intensive part in the digital front end of an SDR receiver is the channelizer as it operates at the highest sampling rate. The channelizer extracts multiple channels (frequency bands) from the wideband input signal using a digital filter bank. Reconfigurable low complexity channelizer is a vital part in SDR receivers. This thesis addresses the problem of incorporating low complexity and reconfigurability into the channelizer architecture.