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Class Information
Number: 455/296
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Noise or interference elimination
Description: Subject matter having structure to (a) suppress the influence of extraneous electric or magnetic fields upon receiver circuitry, (b) prevent radiation of undesired electric or magnetic fields from the receiver circuitry, or (c) prevent translation through, or suppress at some point in, the receiver system any undesired modulation components accompanying a desired modulation carrier wave input signal which components are due to electrical disturbances within the useful frequency band or any undesired carrier wave, which may originate at a source external to the receiver wave input or collection means and arrive at the input or collector simultaneously with the desired modulated carrier wave.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7620121 |
DC balance compensation for AC-coupled circuits |
Nov. 17, 2009 |
| 7620373 |
Apparatus and method for calibration of gain and/or phase imbalance and/or DC offset in a communication system |
Nov. 17, 2009 |
| 7616926 |
Conductive DC biasing for capacitively coupled on-chip drivers |
Nov. 10, 2009 |
| 7616936 |
Push-to-talk system with enhanced noise reduction |
Nov. 10, 2009 |
| 7616973 |
Portable audio device having reduced sensitivity to RF interference and related methods |
Nov. 10, 2009 |
| 7613438 |
Method for reducing the effect of impulse noise in a motor vehicle radio |
Nov. 3, 2009 |
| 7609789 |
Phase noise compensation for MIMO WLAN systems |
Oct. 27, 2009 |
| 7610031 |
Error correction in receiver of radio system |
Oct. 27, 2009 |
| 7606548 |
Data transmission method |
Oct. 20, 2009 |
| 7606193 |
Methods for implementing a dynamic frequency selection (DFS) feature for WLAN devices |
Oct. 20, 2009 |
| 7606547 |
Active resistance summer for a transformer hybrid |
Oct. 20, 2009 |
| 7602866 |
Signal receiver devices and methods |
Oct. 13, 2009 |
| 7603084 |
Method and apparatus for DC offset calibration |
Oct. 13, 2009 |
| 7603085 |
Bandpass filter with integrated variable gain function |
Oct. 13, 2009 |
| 7603094 |
DC offset correction for direct conversion receivers |
Oct. 13, 2009 |
| 7599671 |
Radar detection apparatus and method thereof |
Oct. 6, 2009 |
| 7599453 |
Doppler spread estimation for OFDM systems |
Oct. 6, 2009 |
| 7596363 |
Method and system for measuring receiver mixer IQ mismatch |
Sep. 29, 2009 |
| 7596361 |
Low noise amplification circuit |
Sep. 29, 2009 |
| 7596181 |
Apparatus and method for frequency synchronization in OFDM system |
Sep. 29, 2009 |
| 7593706 |
Dynamic pre-selector for a GPS receiver |
Sep. 22, 2009 |
| 7593461 |
Multi-user detection using equalization and successive interference cancellation |
Sep. 22, 2009 |
| 7590388 |
Method and arrangement for noise variance and SIR estimation |
Sep. 15, 2009 |
| 7587191 |
High-quality detection based on sequential interference cancellation techniques |
Sep. 8, 2009 |
| 7587187 |
Ultra wide band, differential input/output, high frequency active mixer in an integrated circuit |
Sep. 8, 2009 |
| 7587171 |
Reducing interference in a wireless communications signal in the frequency domain |
Sep. 8, 2009 |
| 7586998 |
Method and apparatus for receiver pulse response determination |
Sep. 8, 2009 |
| 7583768 |
Apparatus for canceling intersymbol interference in semiconductor memory device and method thereof |
Sep. 1, 2009 |
| 7583946 |
Wireless communication system and method using clock swapping during image rejection calibration |
Sep. 1, 2009 |
| 7583947 |
Method and system for single sideband mixing receiver architecture for improving signal quality |
Sep. 1, 2009 |
| 7580692 |
Mobile wireless communications device having low-IF receiver circuitry that adapts to radio environment |
Aug. 25, 2009 |
| 7580691 |
System and method for reducing self interference |
Aug. 25, 2009 |
| 7580680 |
Method of reducing imbalance in a quadrature frequency converter, method of measuring imbalance in such a converter, and apparatus for performing such method |
Aug. 25, 2009 |
| 7574184 |
Method and device for detecting occupation by a signal of an adjacent channel |
Aug. 11, 2009 |
| 7574188 |
Apparatus and method for removing jammer signal in wireless communication receiver |
Aug. 11, 2009 |
| 7570935 |
Derivative superposition circuit for linearization |
Aug. 4, 2009 |
| 7567609 |
Space-time multiuser detector in mobile communication system and method thereof |
Jul. 28, 2009 |
| 7567783 |
I/Q mismatch calibration of direct conversion transceivers using the OFDM short training sequence |
Jul. 28, 2009 |
| 7565127 |
Signal processing unit |
Jul. 21, 2009 |
| 7565121 |
Clock noise canceling circuit |
Jul. 21, 2009 |
| 7565120 |
Semiconductor integrated circuit and semiconductor integrated circuit for radio communication |
Jul. 21, 2009 |
| 7565111 |
Single-antenna interference cancellation receiver in time slot communication system |
Jul. 21, 2009 |
| 7561860 |
Receiver |
Jul. 14, 2009 |
| 7561864 |
RF receiver with NLMS channel estimator and method therefor |
Jul. 14, 2009 |
| 7558258 |
Wireless communication method and wireless communication apparatus |
Jul. 7, 2009 |
| 7558348 |
Radio frequency antenna system and high-speed digital data link to reduce electromagnetic interference for wireless communications |
Jul. 7, 2009 |
| 7558543 |
Radio frequency tuner |
Jul. 7, 2009 |
| 7558546 |
Selectable high-side/low-side mix for high intermediate frequency (IF) receivers |
Jul. 7, 2009 |
| 7558550 |
Versatile system for multimode, wireless communication receiver with ZIF and Near-ZIF operations |
Jul. 7, 2009 |
| 7555281 |
RF receiving apparatus |
Jun. 30, 2009 |
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