| 摘要 |
PROBLEM TO BE SOLVED: To provide a channelizer for recovering many communication channels at the same time without the need for using a sub-band tuner in duplicate. SOLUTION: The channelizer (224) comprises an n-point discrete Fourier transform (DFT) circuit (208) coupled to an output data rate output (226) and a plurality of individual recovered channel outputs (210) coupled to the DFT circuit (208). Resampling circuitry (302, 306) in a resampling filter (204) converts an input data rate to an output data rate in a manner commensurate with a preselected communication channel spacing, communication channel output sample rate, and the number of communication channels. The DFT circuit may use (n-m) point overlap and the channelizer (224) may further include a polyphase filter (206) implementing n/m oversampling coupled between the resampling filter and the DFT circuit. COPYRIGHT: (C)2003,JPO
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