Abstract
Aiming at the problem of large area and high power consumption of traditional CIC (Cascade Integral Comb Filter) decimation filter, a folded multistage cascade CIC decimation filter is designed. The nibble-serial arithmetic and multiplexing technology are used to reduce the operation and storage logic unit, lower the cost and improve the utilization efficiency of system resources. The folded multistage cascade CIC decimation filter has a programmable structure of down sampling factor and can dynamically realize 1∼16 times extraction. It is suitable for communication systems with multiple channel bandwidths. In addition, the designed truncation module can optimize the effective accuracy of the final stage output.
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