Sub band filters

Details Sub band filters Sub band filters

1992-05-20

1993-12-07

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 691, 370 70, 358133, 358138, H04J 100, H04N 712

Patent

active

052689050

ABSTRACT:
A sub-band filter system in which the frequency separated data is multiplexed together at the output of each filter stage. The stream of multiplexed data produced can have a block-by-block format or a sample-by-sample format. In the latter case, the filtering can be effected by a finite impulse response filter with switchable tap coefficients for effecting both decimation and high and low pass filtering.

REFERENCES:
patent: 4075429 (1978-02-01), Takahata et al.
patent: 4326288 (1982-04-01), Fettweis
patent: 4412325 (1983-10-01), Molo
patent: 4768187 (1988-08-01), Marshall
patent: 4785447 (1988-11-01), Ichiyoshi
patent: 4918524 (1990-04-01), Ansari
patent: 5032908 (1991-07-01), Miller
patent: 5097331 (1992-03-01), Chen et al.
patent: 5115309 (1992-05-01), Hang

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