H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 25/14 (2006.01) G06F 17/14 (2006.01)
Patent
CA 2298918
The invention is a digital channelizer and a process for dividing input bandwidth into at least some of N channels. A digital channelizer which divides an input bandwidth into at least some of N channels in accordance with the invention includes an analog to digital converter (14) which encodes the input bandwidth into a serial digital data stream of words; a demultiplexer (16), coupled to the analog to digital converter, which divides the serial digital data stream into parallel data streams of data words; a window presum (102), 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; and a discrete Fourier transform apparatus (26'), 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.
Caso Gregory S.
Moretti Vincent C.
Gowling Lafleur Henderson Llp
Northrop Grumman Corporation
Trw Inc.
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