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Class Information
Number: 375/224
Name: Pulse or digital communications > Testing
Description: Subject matter in which at least part of the system is tested.

Sub-classes under this class:

Class Number Class Name Patents
375/225 Data rate 452
375/226 Phase error or phase jitter 553
375/227 Signal noise 545
375/228 With indicator 241

Patents under this class:

Patent Number Title Of Patent Date Issued
8213491 Adaptive ultrawideband receiver method Jul. 3, 2012
8213490 Transceiver system and associated methods and systems Jul. 3, 2012
RE43489 Systems and methods for implementing a sample rate converter using hardware and software to maximize speed and flexibility Jun. 26, 2012
8208875 Systems and methods for automatically calibrating output power of a communication device Jun. 26, 2012
8208865 RF front-end with on-chip transmitter/receiver isolation and noise-matched LNA Jun. 26, 2012
8208586 Jitter measuring apparatus Jun. 26, 2012
8208521 Methods and apparatus for detecting a loss of lock condition in a clock and data recovery system Jun. 26, 2012
8208519 Systems and methods for characterizing transmission lines using broadband signals in a multi-carrier DSL environment Jun. 26, 2012
8199858 OOB (out of band) detection circuit and serial ATA system Jun. 12, 2012
8199048 Calibration technique for phased array antennas Jun. 12, 2012
8194803 Method and apparatus for regaining watermark data that were embedded in an original signal by modifying sections of said original signal in relation to at least two different reference data se Jun. 5, 2012
8194723 Test apparatus for 64B/66B encoding process Jun. 5, 2012
8194721 Signal amplitude distortion within an integrated circuit Jun. 5, 2012
8189724 Closed loop power normalized timing recovery for 8 VSB modulated signals May. 29, 2012
8189694 Transmitting and receiving arrangement with a channel-oriented link May. 29, 2012
8189686 Systems and methods for visualizing errors in video signals May. 29, 2012
8189651 Measuring Hum in a digital TV signal May. 29, 2012
8184747 Flexible timebase for EYE diagram May. 22, 2012
8184723 Feedback system and apparatus for video compensation May. 22, 2012
8184684 Automatic gain control stress measurement for digital carriers May. 22, 2012
8184677 Arrangement in a network repeater for monitoring link integrity and automatically down shifting link speed May. 22, 2012
8179953 Mobile station apparatus and transmission channel estimation method May. 15, 2012
8179952 Programmable duty cycle distortion generation circuit May. 15, 2012
8175829 Analyzer for signal anomalies May. 8, 2012
8175539 System and method for management of a shared frequency band May. 8, 2012
8175140 Systems and methods for a multicarrier transceiver with radio frequency interference reduction May. 8, 2012
8174558 Automatically calibrating a video conference system May. 8, 2012
8170164 Transfer clocks for a multi-channel architecture May. 1, 2012
8170088 Methods for determining a reference signal at any location along a transmission media May. 1, 2012
8165474 Reducing cross modulation in multichannel modulated optical systems with anti-clipping Apr. 24, 2012
8165255 Multirate resampling and filtering system and method Apr. 24, 2012
8165230 Doppler frequency estimation in wireless communication systems Apr. 24, 2012
8165187 Periodic calibration for communication channels by drift tracking Apr. 24, 2012
8165184 Apparatus and method for synthesizing and generating an SSC modulated signal Apr. 24, 2012
8160506 Method and system for transmission and/or reception of signals up to extremely high frequencies utilizing a delay circuit Apr. 17, 2012
8160162 Method for transmitting a signal via a power line network, transmitter, receiver, power line communication modem and power line communication system Apr. 17, 2012
8160126 Method, device and system for upstream power back-off in digital subscriber line Apr. 17, 2012
8155174 Hardware and method to test phase linearity of phase synthesizer Apr. 10, 2012
8154602 Video quality estimation apparatus, method, and program Apr. 10, 2012
8149906 Data transfer between chips in a multi-chip semiconductor device with an increased data transfer speed Apr. 3, 2012
8149905 System and method for doppler frequency estimation Apr. 3, 2012
8149901 Channel switching circuit Apr. 3, 2012
8144803 Inversion of channel distortion by adaptive wavelet lifting Mar. 27, 2012
8144756 Jitter measuring system and method Mar. 27, 2012
8144038 Signal processing apparatus, signal processing system and signal processing method Mar. 27, 2012
8140021 Communication apparatus and communication method Mar. 20, 2012
8140017 Signal detection in cognitive radio systems Mar. 20, 2012
8139627 DC offset estimation in received signals Mar. 20, 2012
8135558 Automated simulation testbench generation for serializer/deserializer datapath systems Mar. 13, 2012
8135055 I/Q calibration of transmit and receive paths in OFDM FDD communication systems Mar. 13, 2012

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