Research on Sub-band Segmentation and Reconstruction Technology Based on WOLA-Structured Filter Banks
Sub-band segmentation and reconstruction technology is the core technology of the antenna array signal full spectrum combine scheme. Based on the principle of complex exponential modulation filter banks, the sub-band segmentation and reconstruction technique based on the Weighted OverLap-Add-(WOLA)-structured filter bank is studied. A filter bank with a sub-band number of 256 and an oversampling factor of 1.45 are designed. Compared with the multiphase DFT-structured filter banks currently used, the filter can not only realize the segmentation and reconstruction of performance and considerable, but also break through the oversampling factor must be integer constraints, the structure is more efficient and more flexible parameter settings.
KeywordsSub-band segmentation and reconstruction Filter bank WOLA Wideband signal
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