Patents by Inventor Neil N. McGowan
Neil N. McGowan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8897124Abstract: A wireless terminal adapted to function in a code division multiple access (CDMA) communications system is provided. The terminal includes a receiver adapted to receive frames having a slot structure in which there is a user identification channel and a shared channel, the shared channel having been transmitted using a plurality of Walsh codes, and containing content for either a plurality of voice users, a plurality of voice users and one high-rate data user, or only one high-rate data user. A slot of the shared channel contains content for a plurality of users which was transmitted in parallel using different Walsh code spaces for different users. The wireless terminal is adapted to decode the user identification channel to determine when a slot of the shared channel contains voice and/or high-rate data content for the wireless terminal.Type: GrantFiled: June 28, 2012Date of Patent: November 25, 2014Assignee: Alcatel LucentInventors: Xixian Chen, Neil N. McGowan, Muhammad Khaledul Islam, Ning Guo, Hong Ren, Litong Li
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Publication number: 20120269052Abstract: A wireless terminal adapted to function in a code division multiple access (CDMA) communications system is provided. The terminal includes a receiver adapted to receive frames having a slot structure in which there is a user identification channel and a shared channel, the shared channel having been transmitted using a plurality of Walsh codes, and containing content for either a plurality of voice users, a plurality of voice users and one high-rate data user, or only one high-rate data user. A slot of the shared channel contains content for a plurality of users which was transmitted in parallel using different Walsh code spaces for different users. The wireless terminal is adapted to decode the user identification channel to determine when a slot of the shared channel contains voice and/or high-rate data content for the wireless terminal.Type: ApplicationFiled: June 28, 2012Publication date: October 25, 2012Inventors: Xixian Chen, Neil N. McGowan, Muhammad Khaledul Islam, Ning Guo, Hong Ren, Litong Li
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Patent number: 8248912Abstract: A forward link design is provided employing CDMA (code division multiple access) technologies in which time division multiplexing is employed between data and control information on the forward link to service multiple users per slot. Another forward link design employing CDMA (code division multiple access) technologies is provided in which code division multiplexing between data and control information is employed on the forward link to service multiple users per slot, which is preferably backwards compatible with legacy standards such as IS2000A. A reverse link design is also provided.Type: GrantFiled: May 1, 2006Date of Patent: August 21, 2012Assignee: Alcatel LucentInventors: Xixian Chen, Neil N. McGowan, Muhammad Khaledul Islam, Ning Guo, Hong Ren, Litong Li
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Patent number: 7760698Abstract: A forward link design is provided employing CDMA (code division multiple access) technologies in which time division multiplexing is employed between data and control information on the forward link to service multiple users per slot. Another forward link design employing CDMA (code division multiple access) technologies is provided in which code division multiplexing between data and control information is employed on the forward link to service multiple users per slot, which is preferably backwards compatible with legacy standards such as IS2000A. A reverse link design is also provided.Type: GrantFiled: October 13, 2006Date of Patent: July 20, 2010Assignee: Alcatel LucentInventors: Xixian Chen, Neil N. McGowan, Muhammad Khaled Islam, Ning Guo, Hong Ren, Litong Li
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Patent number: 7206355Abstract: A forward link transmitter in a sectored cell includes a baseband processor having traditional baseband signal digital processing circuitry in addition to including a digital hybrid matrix (vector and delay compensated transformation module) whose phase and amplitude (vector) and delay may be adjusted to compensate for downstream errors that are introduced and detected by a feedback circuit. Accordingly, the baseband processor, by monitoring an output of an analog hybrid matrix producing modulated and amplified radio frequency (RF) signals just prior to propagation from an antenna, can determine errors produced by the analog circuitry including the analog hybrid matrix and may compensate for the same by introducing an amplitude, phase and delay adjustment (in the digital domain) into output digital waveform signals to compensate for the error introduced downstream to the baseband processor.Type: GrantFiled: December 2, 2002Date of Patent: April 17, 2007Assignee: Nortel Networks LimitedInventors: Neil N. McGowan, Marthinus W. Da Silveira, Mihai Parvan, Matthew Conrod
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Patent number: 7154846Abstract: A forward link design is provided employing CDMA (code division multiple access) technologies in which time division multiplexing is employed between data and control information on the forward link to service multiple users per slot. Another forward link design employing CDMA (code division multiple access) technologies is provided in which code division multiplexing between data and control information is employed on the forward link to service multiple users per slot, which is preferably backwards compatible with legacy standards such as IS2000A. A reverse link design is also provided.Type: GrantFiled: October 24, 2001Date of Patent: December 26, 2006Assignee: Nortel Networks LimitedInventors: Xixian Chen, Neil N. McGowan, Khaled M. Islam, Ning Guo, Hong Ren, Litong Li
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Patent number: 7127267Abstract: A plurality of base station transceiver subsystems determine whether to scale the forward link transmission power level and, if so, by what amount to control forward link transmission power level mismatch. The plurality of base stations transmit reverse link signal-to-noise ratio information and forward link transmission power levels for a specified transmission to the base station controller. The base station controller compares the reverse link signal-to-noise ratio readings received from each of the plurality of base stations to determine and select a dominant base station. The base station controller then transmits the dominant base station's forward link transmission power level for the specified transmission to each of the plurality of base stations that is communicating with the mobile station that is in hand-off. Each base station, accordingly, determines whether to scale its forward link transmission power level.Type: GrantFiled: December 2, 2002Date of Patent: October 24, 2006Assignee: Nortel Networks LimitedInventors: Neil N. McGowan, Hong Ren, Ashvin Chheda
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Patent number: 6977915Abstract: A method and system for closed loop power control in a wireless communication network. A received signal is despread. The signal power of the despread received signal is estimated. The noise power of the despread received signal is estimated. Estimating the noise power includes multiplying the despread received signal with an orthogonal noise code to cancel the received signal, accumulating the multiplied despread received signal over one frame and determining a signal-to-noise ratio of the received signal at least in part by dividing the estimated signal power by the estimated noise power. A reverse power control bit is determined based on the determined signal-to-noise ratio.Type: GrantFiled: January 30, 2001Date of Patent: December 20, 2005Assignee: Nortel Networks LimitedInventors: Xixian Chen, Neil N. McGowan, Weigang Li, Jeffrey D. Stanier, M. Khaled Islam, Qiang Shen, Xin Jin
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Patent number: 6931053Abstract: A peak power regulator is disclosed that functions within a Code Division Multiple Access (CDMA) transmitter to reduce peak power spikes within baseband signals, controlling the out-of-band emissions, and maintaining the in-band signal quality within an acceptable degradation. In-phase and quadrature baseband signals are input to an envelope magnitude predictor within the peak power regulator. The envelope magnitude predictor outputs an estimate for the magnitude of the envelope that will be generated when the inputted baseband signals are modulated. This estimate is input to a multiplier that generates a ration by dividing the estimate by a maximum acceptable envelope magnitude. The ratio is subsequently input to a mapping table that outputs a scaling factor sufficient for reducing peak power spikes. The scaling factor is subsequently subtracted from a value of one and multiplied by first delayed versions of the in-phase and quadrature baseband input signals.Type: GrantFiled: December 5, 2000Date of Patent: August 16, 2005Assignee: Nortel Networks LimitedInventor: Neil N. McGowan
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Publication number: 20040106423Abstract: A plurality of base station transceiver subsystems determine whether to scale the forward link transmission power level and, if so, by what amount to control forward link transmission power level mismatch. The plurality of base stations transmit reverse link signal-to-noise ratio information and forward link transmission power levels for a specified transmission to the base station controller. The base station controller compares the reverse link signal-to-noise ratio readings received from each of the plurality of base stations to determine and select a dominant base station. The base station controller then transmits the dominant base station's forward link transmission power level for the specified transmission to each of the plurality of base stations that is communicating with the mobile station that is in hand-off. Each base station, accordingly, determines whether to scale its forward link transmission power level.Type: ApplicationFiled: December 2, 2002Publication date: June 3, 2004Inventors: Neil N. McGowan, Hong Ren, Ashvin Chheda
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Publication number: 20040105509Abstract: A forward link transmitter in a sectored cell includes a baseband processor having traditional baseband signal digital processing circuitry in addition to including a digital hybrid matrix (vector and delay compensated transformation module) whose phase and amplitude (vector) and delay may be adjusted to compensate for downstream errors that are introduced and detected by a feedback circuit. Accordingly, the baseband processor, by monitoring an output of an analog hybrid matrix producing modulated and amplified radio frequency (RF) signals just prior to propagation from an antenna, can determine errors produced by the analog circuitry including the analog hybrid matrix and may compensate for the same by introducing an amplitude, phase and delay adjustment (in the digital domain) into output digital waveform signals to compensate for the error introduced downstream to the baseband processor.Type: ApplicationFiled: December 2, 2002Publication date: June 3, 2004Inventors: Neil N. McGowan, Marthinus W. Da Silveira, Mihai Parvan, Matthew Conrod
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Publication number: 20030067899Abstract: A forward link design is provided employing CDMA (code division multiple access) technologies in which time division multiplexing is employed between data and control information on the forward link to service multiple users per slot. Another forward link design employing CDMA (code division multiple access) technologies is provided in which code division multiplexing between data and control information is employed on the forward link to service multiple users per slot, which is preferably backwards compatible with legacy standards such as IS2000A. A reverse link design is also provided.Type: ApplicationFiled: October 24, 2001Publication date: April 10, 2003Inventors: Xixian Chen, Neil N. McGowan, Mohammad Khaledul Islam, Ning Guo, Hong Ren, Litong Li
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Publication number: 20020105929Abstract: A forward link design is provided employing CDMA (code division multiple access) technologies in which time division multiplexing is employed between data and control information on the forward link to service multiple users per slot. Another forward link design employing CDMA (code division multiple access) technologies is provided in which code division multiplexing between data and control information is employed on the forward link to service multiple users per slot, which is preferably backwards compatible with legacy standards such as IS2000A. A reverse link design is also provided.Type: ApplicationFiled: October 24, 2001Publication date: August 8, 2002Inventors: Xixian Chen, Neil N. McGowan, Mohammad Khaledul Islam, Ning Guo, Hong Ren, Litong Li
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Publication number: 20020101832Abstract: A method and system for closed loop power control in a wireless communication network. A received signal is despread. The signal power of the despread received signal is estimated. The noise power of the despread received signal is estimated. Estimating the noise power includes multiplying the despread received signal with an orthogonal noise code to cancel the received signal, accumulating the multiplied despread received signal over one frame and determining a signal-to-noise ratio of the received signal at least in part by dividing the estimated signal power by the estimated noise power. A reverse power control bit is determined based on the determined signal-to-noise ratio.Type: ApplicationFiled: January 30, 2001Publication date: August 1, 2002Inventors: Xixan Chen, Neil N. Mcgowan, Weigang Li, Jeffrey D. Stanier, M. K. Islam, Qiang Shen, Xin Jin
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Publication number: 20020067701Abstract: Various embodiments of the invention provide an advanced access channel through which wireless terminals can access an access network. Other embodiments provide a method of performing power control using a shared power control channel. The shared power control channel is also used in conjunction with the advanced access channel to provide an acknowledgement mechanism.Type: ApplicationFiled: October 24, 2001Publication date: June 6, 2002Inventors: Xixian Chen, Neil N. McGowan, Mohammad Khaledul Islam, Ning Guo, Hong Ren
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Publication number: 20010000456Abstract: A peak power regulator is disclosed that functions within a Code Division Multiple Access (CDMA) transmitter to reduce peak power spikes within baseband signals, controlling the out-of-band emissions, and maintaining the in-band signal quality within an acceptable degradation. In-phase and quadrature baseband signals are input to an envelope magnitude predictor within the peak power regulator. The envelope magnitude predictor outputs an estimate for the magnitude of the envelope that will be generated when the inputted baseband signals are modulated. This estimate is input to a multiplier that generates a ratio by dividing the estimate by a maximum acceptable envelope magnitude. The ratio is subsequently input to a mapping table that outputs a scaling factor sufficient for reducing peak power spikes. The scaling factor is subsequently subtracted from a value of one and multiplied by first delayed versions of the in-phase and quadrature baseband input signals.Type: ApplicationFiled: December 5, 2000Publication date: April 26, 2001Inventor: Neil N. McGowan