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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:
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Patent Number Title Of Patent Date Issued
6782044 Radio interference detection and screening system for locomotive control unit radios Aug. 24, 2004
6782045 Frequency error measuring method and frequency error measuring device Aug. 24, 2004
6775237 Methods and apparatus for burst tolerant excessive bit error rate alarm detection and clearing Aug. 10, 2004
6775521 Bad frame indicator for radio telephone receivers Aug. 10, 2004
6771592 Voice and data wireless communication system with improved error recovery Aug. 3, 2004
6771698 System and method for testing antenna gain Aug. 3, 2004
6771699 Method for rapid carrier-frequency offset acquisition using a periodic training sequence Aug. 3, 2004
6771712 System for extracting a clock signal and a digital data signal from a modulated carrier signal in receiver Aug. 3, 2004
6765951 Method for estimating the channel impulse response of a mobile radio channel Jul. 20, 2004
6765954 System and method for implementing a delta-sigma modulator integrity supervisor Jul. 20, 2004
6765955 Methods, systems and computer program products establishing a communication configuration for a modem connection to compensate for echo noise Jul. 20, 2004
6765971 System method and computer program product for improved narrow band signal detection for echo cancellation Jul. 20, 2004
6765989 Method for optimizing downstream data transfer in an asymmetric digital subscriber line modem Jul. 20, 2004
6763063 Peak value estimation of sampled signal Jul. 13, 2004
6760277 Arrangement for generating multiple clocks in field programmable gate arrays of a network test system Jul. 6, 2004
6757318 Apparatus and method for synchronizing with a communication network by shadowing a page response connection to the network Jun. 29, 2004
6754260 Digital modulation signal measuring device and method capable of evaluating spectrum of noise component Jun. 22, 2004
6744813 System and method for estimating noise characteristics in the presence of non-stationary noise Jun. 1, 2004
6734684 Spectral shaping circuit May. 11, 2004
6735216 Simplified quality indicator bit test procedures May. 11, 2004
6735261 Calibration of a N-port receiver May. 11, 2004
6731680 Method of changing from a first transmission path and/or transmission mode to a second transmission path and/or transmission mode May. 4, 2004
6731691 Multi-pair gigabit ethernet transceiver having adaptive disabling of circuit elements May. 4, 2004
6728310 Data processing apparatus and data processing method Apr. 27, 2004
6728311 Apparatus and method for creating eye diagram Apr. 27, 2004
6724814 Pad and CODEC detection Apr. 20, 2004
6721352 Method and device for detecting the presence of a carrier signal transmitted in the reverse RF path Apr. 13, 2004
6717984 Method for analyzing a sample waveform in the time domain Apr. 6, 2004
6718138 Digital-signal quality monitoring method and communications apparatus using this method Apr. 6, 2004
6718296 Measurement of signal quality Apr. 6, 2004
6714605 System and method for real-time spectrum analysis in a communication device Mar. 30, 2004
6714896 Method and apparatus for signal degradation measurement Mar. 30, 2004
6711207 System and method for reduced power consumption in digital subscriber line modems Mar. 23, 2004
6711208 Estimation of traffic-to-pilot ratios Mar. 23, 2004
6704351 Method and system for training a modem Mar. 9, 2004
6704352 High accuracy receiver forward and reflected path test injection circuit Mar. 9, 2004
6704551 Calibration of in-phase and quadrature transmit branches of a transmitter Mar. 9, 2004
6700929 Method and apparatus for multipath parameter estimation in spread-spectrum communications systems Mar. 2, 2004
6693967 Detecting encoding and encoding conversion for modem connections Feb. 17, 2004
6690720 Automated testing of modem training Feb. 10, 2004
6690722 Method for characterizing frequency translation devices Feb. 10, 2004
6690733 Method for data transmission Feb. 10, 2004
6687289 Method for measuring the attenuation in digital transmission lines Feb. 3, 2004
6687499 Method and system for testing the functioning of data communication in a radio apparatus Feb. 3, 2004
6680914 Method for optimizing the performance of the code division multiple access system and the air field environments Jan. 20, 2004
6680969 Methods for estimating doppler spreads including autocorrelation function hypotheses and related systems and receivers Jan. 20, 2004
6671313 Time-weighted transmission channel estimation Dec. 30, 2003
6668014 Equalizer method and apparatus using constant modulus algorithm blind equalization and partial decoding Dec. 23, 2003
6665335 System and method for estimating a shift between two signals where one signal is known in advance Dec. 16, 2003
6665624 Generating and using calibration information Dec. 16, 2003

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