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Minimizing power consumption and complexity in a programmable transmit filter bank for OFDM

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2 Author(s)
A. Mehrnia ; Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA ; B. Daneshrad

Filter banks are efficient and essential signal processing blocks for design and implementation of multi-rate multi-band communications and signaling. In this paper we analytically study and derive the optimum choice of design parameters and filter bank structure to minimize power consumption and implementation cost for a programmable multi-rate transmit filter bank for OFDM. The optimization is performed on two fronts. We first perform system-level power and complexity analysis to define the optimum choice of filter parameters. Then through a hardware-level optimization, an efficient filter bank structure is introduced that results in at least a factor of 4 power reduction and also a complexity reduction from 6.95GOPS to 1.73GOPS for the multi-rate filter bank over the baseline design.

Published in:

Low Power Electronics and Design, 2004. ISLPED '04. Proceedings of the 2004 International Symposium on

Date of Conference:

9-11 Aug. 2004