Patent ID: 6330287
Filing Date: 2001-12-11
Classification: G06F

Abstract:
A digital channelizer which divides an input bandwidth into at least some of N channels comprising:an analog to digital converter which encodes the input bandwidth into a serial digital data stream of words;a demultiplexer, coupled to the analog to digital converter, which divides the serial digital data stream into parallel data streams of data words;a window presume coupled to the parallel streams of data words, responsive to a window presum function, storing L data words in a window containing R subparts and outputting N outputs which are each respectively capable of being processed into a different one of the N channels, each of the N outputs being a product of R words each respectively from a different one of the R subparts and a coefficient of the window presum function preassigned to each of the R words from a different one of the R subparts with R=L/N and each of the N outputs being calculated using distributed arithmetic during a single clock cycle; anda discrete Fourier transform apparatus, coupled to the N outputs of the window presum, having N inputs and which performs a discrete Fourier transform on the N inputs to output at least some of the N channels; and whereinR, L and N are variables.