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Class Information
Number: 329/349
Name: Demodulators > Amplitude modulation demodulator > Having specific distortion, noise or other interference prevention, reduction or compensation
Description: Subject matter including the neutralization of an undesirable characteristic of an amplitude modulation demodulator or its signals.

Sub-classes under this class:

Class Number Class Name Patents
329/350 Automatic amplitude stabilization or control 27
329/353 Noise reduction or compensation 41
329/351 Nonlinearity reduction or compensation 12
329/352 Temperature compensation 10

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8625723 Method and apparatus for performing demapping in wireless communication system Jan. 7, 2014
8610495 Adaptive filtering of blocker signals in demodulators Dec. 17, 2013
8509347 Method and system for baseband predistortion linearization in multi-channel wideband communication systems Aug. 13, 2013
8509341 Communications device including a filter for notching wideband transmit signals and associated methods Aug. 13, 2013
8503510 Communication device, noise removing method, and program Aug. 6, 2013
8503577 Signal quality estimation in a wireless communication system Aug. 6, 2013
8503590 Receiving apparatus for receiving signals through adaptive array antenna Aug. 6, 2013
8472571 Direct detection of wireless interferers in a communication device for multiple modulation types Jun. 25, 2013
8358202 Semiconductor device Jan. 22, 2013
8335269 Apparatus for receiving signals in a communication system based on multicarrier transmission and method for interference cancellation Dec. 18, 2012
8284869 QAM demodulation Oct. 9, 2012
8270546 Reception station, communication system and transmission diversity control method Sep. 18, 2012
8254502 Post decoding soft interference cancellation Aug. 28, 2012
8254484 Method of dirty paper coding using nested lattice codes Aug. 28, 2012
8249203 Truncation of noisy taps in channel estimation Aug. 21, 2012
8243776 Communication device, noise removing method, and program Aug. 14, 2012
8229041 Direct detection of wireless interferers in a communication device for multiple modulation types Jul. 24, 2012
8223907 Method for deriving parasitic signals from modulated digital signals Jul. 17, 2012
8120420 Demodulators Feb. 21, 2012
8120419 Apparatus for type-A demodulation and integrated circuit card including the same Feb. 21, 2012
8073076 Method and apparatus for processing a communication signal Dec. 6, 2011
8068531 Method and apparatus for eliminating narrow band interference by means of windowing processing in spread spectrum system Nov. 29, 2011
8059739 Method and apparatus for correcting data transmission errors Nov. 15, 2011
7911235 Logarithmic detectors Mar. 22, 2011
7868690 Comparator with sensitivity control Jan. 11, 2011
7864879 System having a signal processor for detection of a signal type Jan. 4, 2011
7847627 Demodulator for amplitude-modulated signals Dec. 7, 2010
7844018 Methods and apparatuses for reducing inter-carrier interference in an OFDM system Nov. 30, 2010
7683705 Circuit arrangement and method for matching a demodulator Mar. 23, 2010
7623990 System for reducing signal interference in modulated signal communication Nov. 24, 2009
7579906 System and method for providing a low power low voltage data detection circuit for RF AM signals in EPC0 compliant RFID tags Aug. 25, 2009
7570715 Digital signal receiving circuit Aug. 4, 2009
7542531 Digital cancellation of radio frequency interference Jun. 2, 2009
7535290 AM radio receiving circuit May. 19, 2009
7480348 I/Q demodulation circuit Jan. 20, 2009
7456683 Amplitude error compensating device and quadrature skew error compensating device Nov. 25, 2008
7362814 Memoryless spectrum correction algorithm for non-ideal I/Q demodulators Apr. 22, 2008
7265610 Error detection in a signal in amplitude modulation Sep. 4, 2007
7260163 Noise blanker using an adaptive all-pole predictor and method therefor Aug. 21, 2007
7190733 Memoryless spectrum correction algorithm for non-ideal I/Q demodulators Mar. 13, 2007
6933777 AM detecting apparatus with overmodulation detecting function Aug. 23, 2005
6927623 Amplitude-modulated signal receiving circuit Aug. 9, 2005
6907088 Contactless IC card for preventing incorrect data recovery in demodulation of an amplitude-modulated carrier wave Jun. 14, 2005
6897719 Demodulation circuit and demodulation method May. 24, 2005
6828853 Wide dynamic range demodulator for smart cards or contactless tickets Dec. 7, 2004
6577182 Device for demodulating an amplitude-modulated signal Jun. 10, 2003
6456673 Digital radio frequency interference canceller Sep. 24, 2002
6442218 Demodulator Aug. 27, 2002
6400774 Nonlinearity-caused distortion compensating system Jun. 4, 2002
6169585 Circuit arrangement for demodulating an intermediate-frequency video signal Jan. 2, 2001

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