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Class Information
Number: 455/305
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Noise or interference elimination > Using plural separate signal paths > With balancing or neutralizing
Description: Subject matter in which the outputs of the plural separate paths are combined in such a manner as to balance out or neutralize the modulation representing the undesired signal disturbances.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7627302 |
Apparatus and method for digital image correction in a receiver |
Dec. 1, 2009 |
| 7558543 |
Radio frequency tuner |
Jul. 7, 2009 |
| 7486942 |
Receiver |
Feb. 3, 2009 |
| 7424292 |
Compound wireless mobile communication services |
Sep. 9, 2008 |
| 7400873 |
Method and system for image rejection by using post mixer I/Q equalization |
Jul. 15, 2008 |
| 7373130 |
Simultaneous channel estimation of a carrier and an interferer |
May. 13, 2008 |
| 7356317 |
Adaptive-biased mixer |
Apr. 8, 2008 |
| 7346326 |
Mobile communication terminal with equalizer function |
Mar. 18, 2008 |
| 7228120 |
Circuit and method for reducing direct current biases |
Jun. 5, 2007 |
| 7203473 |
Radio equipment |
Apr. 10, 2007 |
| 7203466 |
Transmitting and receiving unit |
Apr. 10, 2007 |
| 7151917 |
Apparatus and method for deriving a digital image correction factor in a receiver |
Dec. 19, 2006 |
| 7142835 |
Apparatus and method for digital image correction in a receiver |
Nov. 28, 2006 |
| 6947718 |
Deviation compensation apparatus |
Sep. 20, 2005 |
| 6915112 |
Active cancellation tuning to reduce a wireless coupled transmit signal |
Jul. 5, 2005 |
| 6826392 |
Multipath noise reduction method, multipath noise reducer, and FM receiver |
Nov. 30, 2004 |
| 6823180 |
Method and apparatus for adapting antenna visibility in a wireless communications unit |
Nov. 23, 2004 |
| 6813486 |
RF circuit |
Nov. 2, 2004 |
| 6658234 |
Method for extending the effective dynamic range of a radio receiver system |
Dec. 2, 2003 |
| 6516187 |
DC offset correction for direct conversion tuner IC |
Feb. 4, 2003 |
| 6477502 |
Method and apparatus for using non-symmetric speech coders to produce non-symmetric links in a wireless communication system |
Nov. 5, 2002 |
| 6393260 |
Method for attenuating spurious signals and receiver |
May. 21, 2002 |
| 6370205 |
Method and apparatus for performing DC-offset compensation in a radio receiver |
Apr. 9, 2002 |
| 6343211 |
LO cancelling mixer |
Jan. 29, 2002 |
| 6311052 |
PTT radio system |
Oct. 30, 2001 |
| 6198908 |
System and a method for transfer of a digital information carrying signal |
Mar. 6, 2001 |
| 6188880 |
Apparatus and method for reducing low-frequency distortion in frequency converted signals |
Feb. 13, 2001 |
| 6006081 |
Communications receivers |
Dec. 21, 1999 |
| 5923714 |
Normalization circuit for preventing divergence of a normalizing voltage in a coupler used for diversity operation |
Jul. 13, 1999 |
| 5862466 |
Method and apparatus for automatically balancing a radio-frequency mixer |
Jan. 19, 1999 |
| 5862455 |
Fading simulator |
Jan. 19, 1999 |
| 5812942 |
Balanced differential radio receiver and method of operation |
Sep. 22, 1998 |
| 5799004 |
Method for eliminating multiple-access interference and a mobile station |
Aug. 25, 1998 |
| 5584062 |
Method and apparatus for compensating phase locked receivers |
Dec. 10, 1996 |
| 5568158 |
Electronic variable polarization antenna feed apparatus |
Oct. 22, 1996 |
| 5343496 |
Interference suppression in CDMA systems |
Aug. 30, 1994 |
| 5263196 |
Method and apparatus for compensation of imbalance in zero-if downconverters |
Nov. 16, 1993 |
| 5237332 |
Receiver distortion correction circuit and method |
Aug. 17, 1993 |
| 5203016 |
Signal quality-dependent adaptive recursive integrator |
Apr. 13, 1993 |
| 5199048 |
Noise canceler for keying pulse in CATV converter |
Mar. 30, 1993 |
| 5142551 |
Signal weighting system for digital receiver |
Aug. 25, 1992 |
| 5109533 |
Method and apparatus for cancelling noise in a received signal by signal subtraction |
Apr. 28, 1992 |
| 5105435 |
Method and apparatus for cancelling spread-spectrum noise |
Apr. 14, 1992 |
| 4989262 |
Demodulator with multiple interference cancellers responsive to correlations between undesired signals and error signals |
Jan. 29, 1991 |
| 4930035 |
Radio frequency limiter circuit |
May. 29, 1990 |
| 4928315 |
Chirped backscatter filter |
May. 22, 1990 |
| 4908581 |
Frequency demodulator having circuit cancelling undesired signal components |
Mar. 13, 1990 |
| 4849992 |
Pulse-on-pulse circuit and method |
Jul. 18, 1989 |
| 4847860 |
Phase-control system for telecommunications signals received by an adaptive antenna |
Jul. 11, 1989 |
| 4837853 |
Dual port FM demodulation in phase locked receivers |
Jun. 6, 1989 |
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