OFDM TransformDomain Receivers for MultiStandard Communications

This chapter presents transform-domain (TD) receivers, based on charge sampling, as a candidate for the implementation of high-performance wideband and ultrawideband radio frequency (RF) receivers. It introduces the TD receiver, including the receiver structure, RF front end, mixing, and integration blocks. The chapter presents the fundamental detection, synchronization, and calibration equations for the design of the digital baseband blocks for multicarrier signals. The multi-channel sinc filter bank is compared with conventional analog filter banks. Both the analog and digital complexities of both filter banks are analyzed and compared in a multi-carrier receiver scenario. Simulation results are presented to show least-mean-squares (LMS) calibration and frequency offset estimation of the system. A lower bound on the gain-bandwidth product (GBW) of the OP-AMP in a charge sampling circuit is obtained in the chapter. The chapter provides two applications of TD receivers such as software-defined radio multi-standard receiver and TD distributed sensor relay. Controlled Vocabulary Terms least mean squares methods; OFDM; radio frequency; signal processing system; software radio

OFDM TransformDomain Receivers for MultiStandard Communications Chapter