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DIGITAL FRONT END FOR OVERSAMPLED LOW-IF OR ZERO-IF MULTIMODE RECEIVERS
DIGITAL FRONT END FOR OVERSAMPLED LOW-IF OR ZERO-IF MULTIMODE RECEIVERS
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机译:数字前端,用于过低,低中频或零中频多模接收器
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摘要
A digital radio signal is processed by converting an analog signal to a digital signal, decimating the digital signal using a CIC filter and supplying the decimated digital signal directly to an asynchronous sample rate converter (ASRC). The decimated signal is resampled in the ASRC and the ASRC output is supplied directly to a droop compensation filter to compensate the output of the ASRC. By carefully choosing the response of the CIC filter and the resample rate of the ASRC, aliased artifacts in the pass band can be kept below a threshold magnitude without the need for a channelization filter.
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