A New Design of Low Hardware Cost and Low Power Programmable FIR Filters
A New Design of Low Hardware Cost and Low Power Programmable FIR Filters
Abstract:
Programmable Finite Impulse Response (FIR) filters (Proakis et al., 2007) are widely used in various fields such as communication, radio, audio, and signal processing. The Reconfigurable Multiple Constant Multiplication (RMCM) modules are commonly employed to design programmable FIR filters. In this brief, we propose a novel RMCM optimization algorithm to optimize the hardware cost and power consumption of the RMCM module which means lower chip area and lower operating power consumption. In order to reduce the overall search space, a segmented analysis method that divided the global search space into several sub-search spaces is first proposed. In addition, we introduce a novel necessity-first search algorithm for each sub-search space, which can optimize the structures of the multiplexers and shifters in the RMCM module simultaneously. The benchmark filters examples show that the proposed method can reduce the hardware cost and power consumption by at least 13.04% and 2.74% compared with the existing state-of-art methods.
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A New Design of Low Hardware Cost and Low Power Programmable FIR Filters
