Method and apparatus for removing cross modulation noise in...

Details Method and apparatus for removing cross modulation noise in... Method and apparatus for removing cross modulation noise in...

2005-11-23

2008-11-11

Vuong, Quochien B (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Distortion, noise, or other interference prevention,...

C455S067130, C455S278100, C455S295000

Reexamination Certificate

active

07450906

ABSTRACT:
A method and apparatus are provided for removing cross modulation (CM) noise in a wireless transceiver. A determination is made as to whether a transmission signal to be supplied to a transmitter of the wireless transceiver is present. If the transmission signal is present, a level of the transmission signal is determined. When a value of the transmission signal level is equal to or greater than a predetermined value, a first number of filtering operations are performed on a received signal to be input into a receiver of the wireless transceiver. However, when no transmission signal is present or the value of the transmission signal level is less than the predetermined value, a second number of filtering operations are performed on the received signal to be input into the receiver of the wireless transceiver. The first number of filtering operations being greater than the second number of filtering operations.

REFERENCES:
patent: 4476575 (1984-10-01), Franke et al.
patent: 5862461 (1999-01-01), Yoshizawa et al.
patent: 6212174 (2001-04-01), Lomp et al.
patent: 6819938 (2004-11-01), Sahota
patent: 7113752 (2006-09-01), Leinonen et al.

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