A new implementation of arbitrary-length cosine-modulated filter bank
نویسندگان
چکیده
In this paper, the fast implementation of cosine-modulated filter bank (CMFB) is revisited. A class of paraunitary CMFBs with arbitrary length is considered. By further reorganizing of the polyphase component matrix and using the linear-phase property of the prototype filter, we obtain a more efficient implementation structure for the CMFB, in which we use 2 x 2 lossless matrices instead of 2 x I ones. In the new implementation, the number of twochannel iossless lattices is reduced by a factor of two.
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تاریخ انتشار 1998