Pulse or digital communications – Receivers – Interference or noise reduction
Patent
1997-04-03
2000-11-21
Vo, Don N.
Pulse or digital communications
Receivers
Interference or noise reduction
375349, 455306, 455307, H03D 106
Patent
active
061513733
ABSTRACT:
A receiver is provided in which a composite signal is split into two paths. In the first path, a desired signal channel is suppressed by a notch filter. The remaining channels in the composite signal are inverted. In the second path, the signal is delayed to match the delay imposed by the first path. The signal from the first path is recombined with the second path, which reduces the signal level of the undesired channels to the level of quantization noise. The desired signal can then be amplified using the full dynamic range of the amplifier circuitry. If desired, more than one channel may be received at a time. Further, if the two or more channels that are being received have different signal strengths, the digital filtering functions of the notch filter can be used to selectively weight the signals to equalize their strengths. In addition, channels of different bandwidths can be received.
REFERENCES:
patent: 3621401 (1971-11-01), Young, Jr.
patent: 4287475 (1981-09-01), Eaton et al.
patent: 4320523 (1982-03-01), Horikawa et al.
patent: 4326294 (1982-04-01), Okamoto et al.
patent: 4408350 (1983-10-01), Donath
patent: 4613978 (1986-09-01), Kurth et al.
patent: 4673982 (1987-06-01), Tam et al.
patent: 4972430 (1990-11-01), Cantwell
patent: 5235621 (1993-08-01), Amir-Alikhani
patent: 5282023 (1994-01-01), Scarpa
patent: 5353301 (1994-10-01), Mitzlaff
patent: 5410750 (1995-04-01), Cantwell et al.
patent: 5461646 (1995-10-01), Anvari
patent: 5502747 (1996-03-01), McGrath
patent: 5517529 (1996-05-01), Stehlik
patent: 5619536 (1997-04-01), Gourge
patent: 5652768 (1997-07-01), Ritter et al.
patent: 5668837 (1997-09-01), Dent
patent: 5748677 (1998-05-01), Kumar
patent: 5764171 (1998-06-01), Stikvoort
AT&T Corp.
Vo Don N.
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