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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
6661839 Method and device for compressing and expanding data pattern Dec. 9, 2003
6661850 Testing system of voice-band data transmission interface on an exchange Dec. 9, 2003
6658052 Systems and methods for establishing a diagnostic transmission mode and communicating over the same Dec. 2, 2003
6658053 Pulse shaping for a baseband wireless transmitter Dec. 2, 2003
6654429 Pilot-aided channel estimation for OFDM in wireless systems Nov. 25, 2003
6647065 Process aimed at the extraction of electrical signals, without breaking a line pair Nov. 11, 2003
6643338 Space time block coded transmit antenna diversity for WCDMA Nov. 4, 2003
6636722 Broadband receiver amplitude/phase normalization using a broadband temperature compensated noise source and a pseudo random sequence generator Oct. 21, 2003
6631159 Transceiver with disconnect detector Oct. 7, 2003
6631178 System and method for transmitting data over loaded and unloaded twisted pairs Oct. 7, 2003
6631339 Data path evaluation system and method Oct. 7, 2003
6611556 Identification system for monitoring the presence/absence of members of a defined set Aug. 26, 2003
6606353 Multi-position switch for single digital I/O pin Aug. 12, 2003
6606354 Process and device to measure the signal quality of a digital information transmission system Aug. 12, 2003
6594307 Device and method for signal quality determination Jul. 15, 2003
6590929 Method and system for run-time logic verification of operations in digital systems Jul. 8, 2003
6590930 Local area network diagnosis Jul. 8, 2003
6591110 Method of detecting and calculating external jammer signal power in communication systems Jul. 8, 2003
6577964 Apparatus and method for determining compliance margin of a waveform relative to a standard Jun. 10, 2003
6574308 Digital subscriber line diagnostic system Jun. 3, 2003
6574797 Method and apparatus for locating a cleaner bandwidth in a frequency channel for data transmission Jun. 3, 2003
6570909 Interference suppression in a CDMA receiver May. 27, 2003
6570914 Amplitude calculation circuit May. 27, 2003
6570933 Method in digital quadrature modulator and demodulator, and digital quadrature modulator and demodulator May. 27, 2003
6563867 Arrangement for analyzing the nonlinear properties of a communication channel May. 13, 2003
6556623 Systems and methods for a multi-carrier transceiver with radio frequency interference reduction Apr. 29, 2003
6553064 Method and apparatus for performing mobile station assisted hard handoff using error correction codes Apr. 22, 2003
6553065 Mobile station employing CRC verification using decoding reliability and methods therefor Apr. 22, 2003
6549570 Apparatus for line state analysis in a telecommunications system Apr. 15, 2003
6549571 Circuitry and method for duty measurement Apr. 15, 2003
6549757 Method and system for assessing, at reception level, the quality of a digital signal, such as a digital audio/video signal Apr. 15, 2003
6546055 Carrier offset determination for RF signals having a cyclic prefix Apr. 8, 2003
6542538 Method and apparatus for testing wireless communication channels Apr. 1, 2003
6529547 Storage and reproduction method and apparatus Mar. 4, 2003
6529548 Device and method for detecting data communication property Mar. 4, 2003
6523233 Method and apparatus for telephone network impairment detection and compensation in signal transmission between modems Feb. 25, 2003
6522689 Monitoring circuit for a data transmission network Feb. 18, 2003
6522690 Zero determination signal generating circuit Feb. 18, 2003
6519278 Transmitting/receiving apparatus using a plurality of spreading codes Feb. 11, 2003
6516026 Data transmission equipment Feb. 4, 2003
6512787 Digital impairment learning method and system Jan. 28, 2003
6512788 RF output spectrum measurement analyzer and method Jan. 28, 2003
6513136 Communications receiver arrangement Jan. 28, 2003
6507612 Bus access controller Jan. 14, 2003
6507624 Bandpass sampling architecture for wide-frequency band signal analysis Jan. 14, 2003
6504881 Viterbi decoder with enhanced test function Jan. 7, 2003
6504905 System and method of testing voice signals in a telecommunication system Jan. 7, 2003
6493380 System and method for estimating signal time of arrival Dec. 10, 2002
6493401 Receiving circuit and method for a controlled area network system Dec. 10, 2002
6490317 Data, path and flow integrity monitor Dec. 3, 2002

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