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Class Information
Number: 375/350
Name: Pulse or digital communications > Receivers > Interference or noise reduction > By filtering (e.g., digital)
Description: Subject matter wherein the noise is reduced by a frequency domain or digital sequence filter. The filter may remove interference or pass only desired signals.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8204164 Communications system using adaptive filter and selected adaptive filter taps Jun. 19, 2012
8204103 Scalable equalizer for multiple-in-multiple-out (MIMO) wireless transmission Jun. 19, 2012
8199865 Method and device for synchronization and channel estimation in a radio receiver Jun. 12, 2012
8199864 Quadrature phase shift keying demodulator of digital broadcast reception system and demodulation method thereof Jun. 12, 2012
8199862 Arrangements for interference mitigation utilizing estimation Jun. 12, 2012
8199845 Up-link SDMA receiver for WiMAX Jun. 12, 2012
8199838 Transmission apparatus and a reception apparatus in a multicarrier transmission system and a transmission method and a reception method using the multicarrier transmission system Jun. 12, 2012
8194807 Method to discriminate a real echo peak from an aliased echo peak Jun. 5, 2012
8194728 Tap/group-revivable decision feedback equalizing method and equalizer using the same Jun. 5, 2012
8194725 Communication system Jun. 5, 2012
8189717 Low IF radio receiver May. 29, 2012
8189653 Radio receiver in a wireless communications system May. 29, 2012
8189648 Scaling using gain factors for use in data detection May. 29, 2012
RE43402 Adaptive adjustment of time and frequency domain equalizers in communications systems May. 22, 2012
8184754 Spur mitigation techniques May. 22, 2012
8184753 Apparatus and method for OFDM channel equalization May. 22, 2012
8184748 Narrow band receiver May. 22, 2012
8184744 Method and receiver for estimating the channel impulse response using a constant modulus interference removal iteration May. 22, 2012
8180609 Jittery signal generation with discrete-time filtering May. 15, 2012
8180002 Digital signal processing device, digital signal processing method, and digital signal processing program May. 15, 2012
8179953 Mobile station apparatus and transmission channel estimation method May. 15, 2012
8179950 Startup protocol for high throughput communications systems May. 15, 2012
8175204 Receiving device, signal processing method, and program May. 8, 2012
8175203 Broadcast channel estimator May. 8, 2012
8175202 Receiver with clock drift compensation May. 8, 2012
8175201 Systems and methods for adaptive equalization in recording channels May. 8, 2012
8175200 Hybrid correlation and least squares channel estimation May. 8, 2012
8175197 Preamble detection with unknown channel May. 8, 2012
8175143 Adaptive equalization using data level detection May. 8, 2012
8175135 Equalizer with adaptive noise loading May. 8, 2012
8170199 Echo canceller May. 1, 2012
8170163 Partial response receiver May. 1, 2012
8170162 Inter-carrier interference removal device and reception device using the same May. 1, 2012
8170152 Method and apparatus for multiple signal identification and finding the basis functions of the received signal May. 1, 2012
8170141 Transmitting device, transmitting/receiving device, transmitting method and transmitting/receiving method May. 1, 2012
8170134 Transmitter and a method for duplicating same May. 1, 2012
8170125 Subdimensional single-carrier modulation May. 1, 2012
8170093 Equalizing filter circuit May. 1, 2012
8165255 Multirate resampling and filtering system and method Apr. 24, 2012
8165251 Interpolation IIR filter for OFDM baseband processing Apr. 24, 2012
8165190 Apparatus and method for sample rate conversion in a software defined radio communication system Apr. 24, 2012
8160191 Correction of quadrature errors Apr. 17, 2012
8160190 IIR receive filter for OFDM baseband processor Apr. 17, 2012
8160189 Method and system for communication channel characterization Apr. 17, 2012
8160175 Quasi-pilot symbol substitution Apr. 17, 2012
8160167 Radio transmitting apparatus, radio receiving apparatus and method therefor Apr. 17, 2012
8160128 Equalizer in a wireless communication system Apr. 17, 2012
8155255 Method for estimation of signal frequency and displacement estimation method and device with consistency check, period prediction and compensation, and/or adaptive threshold update Apr. 10, 2012
8155250 Receiver with frequency offset compensation for M-state phase modulation Apr. 10, 2012
8155246 Methods, apparatus, and systems for determining 1T path equivalency information in an nT implementation of a viterbi decoder Apr. 10, 2012

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