H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 5/06 (2006.01) G01L 3/14 (2006.01) H04J 1/05 (2006.01) H04L 27/12 (2006.01) H04L 27/14 (2006.01)
Patent
CA 2299821
A signal demultiplexer includes serially-connected 2-demultiplexing filter banks, including band-stop filters and down-samplers for culling sampling frequencies of output signals from filters to 1/2. When the 2-demultiplexing filter bank operates on four types of filters, first to fourth filters in an ascending order of frequencies, 2-demultiplexing filter bank is arranged in one of two configurations so that a first filter bank contains at least the first filter or the second filter, or a second filter bank contains at least the third filter or the fourth filter. The filter banks are connected in such a way that signals processed through the first filter are processed by the first 2-demultiplexing filter bank in a next-stage; signals processed through the second filter are processed by the second 2-demultiplexing filter bank in a next-stage. Signals processed through the third filter are processed by the first 2-demultiplexing filter bank in a next-stage; and signals processed through the fourth filter are processed by the second 2-demultiplexing filter bank in a next-stage.
Kazama Hiroshi
Kobayashi Kiyoshi
Tanabe Kazuhiro
Marks & Clerk
Nippon Telegraph And Telephone Corporation
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