专利名称：Efficient digital channelizer system and
method of operation thereof
发明人：Moretti, Vincent C.,Carrozza, Dominic
P.,Caso, Gregory S.
申请号：EP00103394.3申请日：20000224公开号：EP1032149A2公开日：20000830
专利附图：
摘要：The invention is a digital channelizer and a process for dividing an inputbandwidth into at least some of N channels. A digital channelizer which divides an inputbandwidth into at least some of N channels in accordance with the invention includes ananalog to digital converter (14) which encodes the input bandwidth into a serial digitaldata stream of data words; a demultiplexer (16), coupled to the analog to digitalconverter, which divides the serial digital data stream into M parallel data streams ofdata words; a window presum (102) having N outputs, coupled to the parallel datastreams, each output being a function of a window presum function and data words froma plurality of the parallel data streams; a cyclic shift (24'), coupled to I output groups of
data words, having I cyclic shift paths, each cyclic shift path being responsive to a differentoutput group of data words to produce I output groups of data words which are shiftedwithin the cyclic shift, each cyclic shift path comprising word shifting elements responsiveto a group of data words with I equalling GCD(N,M) and each output group of cyclicallyshifted data words is repeatedly shifted through a number of cycles equal toN/GCD(N,M) with each cycle having a shift value defined by mM*modulo N, or -mM*modulo N wherein individual channels of at least some of the N channels aredecimated by a decimation factor of M and m is an index variable ranging from zeroupward to positive integers; and a discrete Fourier transform apparatus (26') having Ninputs, coupled to the N outputs of the window presum, which performs a discreteFourier transform on the N inputs to produce an output of at least some of the Nchannels.
申请人：TRW Inc.
地址：One Space Park Redondo Beach, California 90278 US
国籍：US
代理机构：Schmidt, Steffen J., Dipl.-Ing.
更多信息请下载全文后查看
因篇幅问题不能全部显示，请点此查看更多更全内容