Patents by Inventor Charles E. Wheatley, III
Charles E. Wheatley, III 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: 7796549Abstract: Schemes to time-align transmissions from multiple base stations to a terminal. To achieve time-alignment, differences between the arrival times of transmissions from the base stations, as observed at the terminal, are determined and provided to the system and used to adjust the timing at the base stations such that terminal-specific radio frames arrive at the terminal within a particular time window. In one scheme, a time difference between two base stations is partitioned into a frame-level time difference and a chip-level time difference. Whenever requested to perform and report time difference measurements, the terminal measures the chip-level timing for each candidate base station relative to a reference base station. Additionally, the terminal also measures the frame-level timing and includes this information in the time difference measurement only if required. Otherwise, the terminal sets the frame-level part to a predetermined value (e.g., zero).Type: GrantFiled: January 24, 2008Date of Patent: September 14, 2010Assignee: Qualcomm IncorporatedInventors: Francesco Grilli, Charles E. Wheatley, III, Serge D. Willenegger, Parvathanathan Subrahmanya
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Publication number: 20100093387Abstract: Techniques to adjust the setpoint of a power control loop in a wireless communication system. The setpoint may be adjusted based on frame status indicative of erased/good decoded frames, one or more (typically soft) metrics indicative of the confidence in the decoded results, power surplus/deficit indicative of the difference between the received signal quality and the setpoint, setpoint surplus/deficit indicative of the difference between the setpoint and a threshold Eb/Nt needed for the desired level of performance, or a combination thereof. The metrics may include re-encoded symbol error rate, re-encoded power metric, modified Yamamoto metric, minimum or average LLR among decoded bits, number of decoding iterations, and possibly others. The setpoint may be adjusted in different manners and/or by different amounts depending on the above-noted factors. The techniques may be employed for forward and/or reverse links in CDMA systems.Type: ApplicationFiled: December 11, 2009Publication date: April 15, 2010Applicant: QUALCOMM IncorporatedInventors: Tao Chen, Jack M. Holtzman, Fuyun Ling, Keith Saints, Nagabhushana Sindhushayana, Charles E. Wheatley, III
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Patent number: 7643842Abstract: Techniques to adjust the setpoint of a power control loop in a wireless communication system. The setpoint may be adjusted based on frame status indicative of erased/good decoded frames, one or more (typically soft) metrics indicative of the confidence in the decoded results, power surplus/deficit indicative of the difference between the received signal quality and the setpoint, setpoint surplus/deficit indicative of the difference between the setpoint and a threshold Eb/Nt needed for the desired level of performance, or a combination thereof. The metrics may include re-encoded symbol error rate, re-encoded power metric, modified Yamamoto metric, minimum or average LLR among decoded bits, number of decoding iterations, and possibly others. The setpoint may be adjusted in different manners and/or by different amounts depending on the above-noted factors. The techniques may be employed for forward and/or reverse links in CDMA systems.Type: GrantFiled: July 12, 2004Date of Patent: January 5, 2010Assignee: QUALCOMM IncorporatedInventors: Tao Chen, Jack M. Holtzman, Fuyun Ling, Keith Saints, Nagabhushana Sindhushayana, Charles E. Wheatley, III
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Publication number: 20090310588Abstract: Methods and apparatus used in a wireless communication system. A data request message may be periodically transmitting by a mobile station to a base station. The data request message may provide information about orthogonal codes to be used by the base station to communicate with the mobile station. The mobile station may receive data transmitted by the base station, the data being transmitted by the base station based on the information about the orthogonal codes provided in the data request message. The information about the orthogonal codes may be based on a quality measure made by the mobile station on a forward link pilot channel from the base station to the mobile station.Type: ApplicationFiled: August 21, 2009Publication date: December 17, 2009Applicant: QUALCOMM IncorporatedInventors: Roberto Padovani, Paul E. Bender, Peter J. Black, Matthew S. Grob, Jurg K. Hinderling, Nagabhushana T. Sindhushayana, Charles E. Wheatley, III
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Patent number: 7592878Abstract: An apparatus for generating an oscillating signal that includes a circuit to accelerate the time in which an oscillating signal reaches a defined steady-state condition from a cold start. The apparatus includes an oscillating circuit to generate an oscillating signal; a first circuit to supply a first current to the oscillating circuit; and a second circuit to supply a second current to the oscillating circuit, wherein the first and second currents are adapted to reduce the time duration for the oscillating signal to reach a defined steady-state condition. The apparatus may be useful in communication systems that use low duty cycle pulse modulation to establish one or more communications channels, whereby the apparatus begins generating an oscillating signal at approximately the beginning of the pulse and terminates the oscillating signal at approximately the end of the pulse.Type: GrantFiled: April 5, 2007Date of Patent: September 22, 2009Assignee: QUALCOMM IncorporatedInventors: Russell John Fagg, Charles E. Wheatley, III
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Publication number: 20090184777Abstract: An apparatus for generating an oscillating signal that includes a circuit to accelerate the time in which an oscillating signal reaches a defined steady-state condition from a cold start. The apparatus includes an oscillating circuit to generate an oscillating signal; a first circuit to supply a first current to the oscillating circuit; and a second circuit to supply a second current to the oscillating circuit, wherein the first and second currents are adapted to reduce the time duration for the oscillating signal to reach a defined steady-state condition. The apparatus may be useful in communication systems that use low duty cycle pulse modulation to establish one or more communications channels, whereby the apparatus begins generating an oscillating signal at approximately the beginning of the pulse and terminates the oscillating signal at approximately the end of the pulse.Type: ApplicationFiled: March 25, 2009Publication date: July 23, 2009Applicant: QUALCOMM IncorporatedInventors: Russell John Fagg, Charles E. Wheatley, III
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Patent number: 7515580Abstract: In a data communication system capable of variable rate transmission, the data rate is determined by the largest C/I measurement of the forward link signals as measured at the Access Terminal. In one embodiment, the data transmission is scheduled based on an Access Terminal initiated forward power control, which reduces forward link rate quantization loss due to excess transmit power. The Access Terminal reports to the Access Point the excess C/I estimate for the selected rate. The Access Point then reduces its transmit power by an appropriate amount when serving that Access Terminal. In another embodiment, the data transmission is scheduled based on an Access Point initiated forward power control. The Access Point varies its transmit power over time either randomly or in synchronism with neighboring Access Points in the communication system, which enables an increase in the throughput achieved by users that receive a significant amount of interference.Type: GrantFiled: June 10, 2004Date of Patent: April 7, 2009Assignee: QUALCOMM, IncorporatedInventors: Charles E. Wheatley, III, Rashid A. Attar, Eduardo A. S. Esteves
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Patent number: 7499427Abstract: In a data communication system capable of variable rate transmission, high rate packet data transmission improves utilization of the forward link and decreases the transmission delay. Data transmission on the forward link is time multiplexed and the base station transmits at the highest data rate supported by the forward link at each time slot to one mobile station. The data rate is determined by the largest C/I measurement of the forward link signals as measured at the mobile station. Upon determination of a data packet received in error, the mobile station transmits a NACK message back to the base station. The NACK message results in retransmission of the data packet received in error. The data packets can be transmitted out of sequence by the use of sequence number to identify each data unit within the data packets.Type: GrantFiled: October 2, 2006Date of Patent: March 3, 2009Assignee: QUALCOMM IncorporatedInventors: Roberto Padovani, Paul E. Bender, Peter J. Black, Matthew S. Grob, Jurg K. Hinderling, Nagabhushana T. Sindhushayana, Charles E. Wheatley, III
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Publication number: 20090053993Abstract: This disclosure is directed to a repeater (14) of a wireless communication system (6) that includes a positioning unit (4), such as a GPS receiver, in order to calculate the location of the repeater (14). In addition, various techniques are described that exploit the positioning information generated by the repeater (14) in order to improve the wireless communication system (6).Type: ApplicationFiled: April 30, 2004Publication date: February 26, 2009Applicant: QUALCOMM INCORPORATEDInventors: Kenneth R. Baker, Charles E. Wheatley, III, Daniel J. Willis, Leonid Sheynblat
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Patent number: 7477677Abstract: Multipath RAKE receiver structure that allows for the concurrent demodulation of multipath signals that arrive at the receiver at arbitrarily low arrival time differences. The fingers are set to be a fixed offset from one another. One finger tracks the shift in the peak of the multipath component and the additional fixed offset fingers follow the tracking.Type: GrantFiled: July 23, 2003Date of Patent: January 13, 2009Assignee: QUALCOMM, IncorporatedInventors: Stein Lundby, Leonid Razoumov, Charles E. Wheatley, III
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Publication number: 20080310321Abstract: Schemes to time-align transmissions from multiple base stations to a terminal. To achieve time-alignment, differences between the arrival times of transmissions from the base stations, as observed at the terminal, are determined and provided to the system and used to adjust the timing at the base stations such that terminal-specific radio frames arrive at the terminal within a particular time window. In one scheme, a time difference between two base stations is partitioned into a frame-level time difference and a chip-level time difference. Whenever requested to perform and report time difference measurements, the terminal measures the chip-level timing for each candidate base station relative to a reference base station. Additionally, the terminal also measures the frame-level timing and includes this information in the time difference measurement only if required. Otherwise, the terminal sets the frame-level part to a predetermined value (e.g., zero).Type: ApplicationFiled: August 22, 2008Publication date: December 18, 2008Applicant: QUALCOMM IncorporatedInventors: Francesco Grilli, Charles E. Wheatley, III, Serge Willenegger, Parvathanathan Subrahmanya
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Publication number: 20080285539Abstract: In the present invention, the slave base station attains synchronization with the reference base station through messages transmitted from and received by a mobile station either in the soft handoff region between the reference base station and the slave base station or within a range which allows the mobile station to communicate with the slave base station. When the mobile station is not in communication with both the reference base station and the slave base station, then the round trip delay between the mobile station and the reference base station is measured by the reference base station. The reference base station communicates the PN code used by the mobile station over the reverse link to the slave base station. The slave base station acquires the signal from the mobile station and determines when the signal from the mobile station arrives. The slave base station then makes an estimate as to the length of the delay between transmission of a signal from the mobile station to the slave base station.Type: ApplicationFiled: November 13, 2007Publication date: November 20, 2008Applicant: Qualcomm IncorporatedInventors: Edward G. Tiedemann, JR., Charles E. Wheatley III
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Patent number: 7433321Abstract: Schemes to time-align transmissions from multiple base stations to a terminal. To achieve time-alignment, differences between the arrival times of transmissions from the base stations, as observed at the terminal, are determined and provided to the system and used to adjust the timing at the base stations such that terminal-specific radio frames arrive at the terminal within a particular time window. In one scheme, a time difference between two base stations is partitioned into a frame-level time difference and a chip-level time difference. Whenever requested to perform and report time difference measurements, the terminal measures the chip-level timing for each candidate base station relative to a reference base station. Additionally, the terminal also measures the frame-level timing and includes this information in the time difference measurement only if required. Otherwise, the terminal sets the frame-level part to a predetermined value (e.g., zero).Type: GrantFiled: April 15, 2003Date of Patent: October 7, 2008Assignee: Qualcomm IncorporatedInventors: Francesco Grilli, Charles E. Wheatley, III, Serge Willenegger, Parvathanathan Subrahmanya
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Patent number: 7400606Abstract: In a CDMA data communication system capable of variable rate transmission, utilization of beam switching techniques decreases the average interference caused by transmissions of a base station to subscriber stations within a cell, and in neighboring cells. Base stations utilize multiple transmit antennas, each transmitting signals at controlled amplitudes and phases, to form transmit signal corresponding to sector divisions. Data and reference signals are transmitted along sector division beams that alternate according to fixed time slots in order to increase system capacity and data rates by maximizing carrier-to-interference ratios (C/I) measured at subscriber stations.Type: GrantFiled: April 16, 2004Date of Patent: July 15, 2008Assignee: QUALCOMM IncorporatedInventors: Roberto Padovani, Paul E. Bender, Ahmad Jalali, Bruce Judson, Charles E. Wheatley, III
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Patent number: 7391759Abstract: When insufficient traffic is present in the network to maintain synchronization in this manner, other methods must be used. One approach involves making direct measurements of the timing between base stations. This is accomplished in one of two ways. The base may interrupt its transmissions on all sectors for a short interval during which it determines the time of arrival of signals from other base stations. Given knowledge of the other base station locations, time errors relative to all other base stations may be derived. Alternatively, the base may send a short signal at high power in the mobile transmit band. This time-of-arrival of this signal is measured by the surrounding base stations and the time errors between pairs of base stations are computed. In some cases, a base station may be isolated sufficiently from all other base stations in the network such that direct base-to-base measurement is not viable.Type: GrantFiled: March 7, 2003Date of Patent: June 24, 2008Assignee: QUALCOMM IncorporatedInventors: Mark S. Wallace, Edward G. Tiedemann, Jr., Charles E. Wheatley, III, J. Rod Walton, Steven J. Howard
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Patent number: 7355993Abstract: A power controlled repeater is disclosed for use in a wireless communication system to control the forward link gain. The power controlled repeater includes a forward link for communications from a base station to a mobile station. In addition, the power controlled repeater includes a reverse link for communications from the mobile station to the base station. An embedded subscriber unit is used at the power controlled repeater and is inserted into the forward link. A microprocessor is in electronic communications with the subscriber unit and implements a method for controlling the forward link gain. The method for controlling the forward link gain includes using the embedded subscriber unit in the power controlled repeater to control the forward link gain.Type: GrantFiled: June 27, 2002Date of Patent: April 8, 2008Inventors: Keith L. Adkins, Charles E. Wheatley, III
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Patent number: 7295531Abstract: In the present invention, the slave base station attains synchronization with the reference base station through messages transmitted from and received by a mobile station either in the soft handoff region between the reference base station and the slave base station or within a range which allows the mobile station to communicate with the slave base station. When the mobile station is not in communication with both the reference base station and the slave base station, then the round trip delay between the mobile station and the reference base station is measured by the reference base station. The reference base station communicates the PN code used by the mobile station over the reverse link to the slave base station. The slave base station acquires the signal from the mobile station and determines when the signal from the mobile station arrives. The slave base station then makes and estimate as to the length of the delay between transmission of a signal from the mobile station to the slave base station.Type: GrantFiled: April 25, 2001Date of Patent: November 13, 2007Assignee: QUALCOMM IncorporatedInventors: Charles E. Wheatley, III, Edward G. Tiedemann, Jr.
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Patent number: 7184426Abstract: In a data communication system capable of variable rate transmission, high rate packet data transmission improves utilization of the forward link and decreases the transmission delay. Data transmission on the forward link is time multiplexed and the base station transmits at the highest data rate supported by the forward link at each time slot to one mobile station. The data rate is determined by the largest C/I measurement of the forward link signals as measured at the mobile station. Upon determination of a data packet received in error, the mobile station transmits a NACK message back to the base station. The NACK message results in retransmission of the data packet received in error. The data packets can be transmitted out of sequence by the use of sequence number to identify each data unit within the data packets.Type: GrantFiled: March 25, 2004Date of Patent: February 27, 2007Assignee: Qualcomm, IncorporatedInventors: Roberto Padovani, Paul E. Bender, Peter J. Black, Matthew S. Grob, Jurg K. Hinderling, Nagabhushana T. Sindhushayana, Charles E. Wheatley, III
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Patent number: 7130334Abstract: The present invention includes a cellular pilot signal detector or searcher for use in a cellular mobile communications unit. The signal detector uses a matched filter to detect a pilot signal transmitted from a cellular base station. The matched filter includes a plurality of taps and a plurality of delays located between adjacent taps. The signal components of a received digital signal are held on the taps of the matched filter by the delays. The matched filter compares the signal components of the received signal to an expected or searched for digital pattern. The matched filter puts out a relatively large signal if the received digital signal matches the expected digital pattern. The matched filter can also be used in parallel with a correlator.Type: GrantFiled: January 16, 2004Date of Patent: October 31, 2006Assignee: Qualcomm, Inc.Inventors: Charles E. Wheatley, III, John E. Maloney
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Patent number: 7079550Abstract: In a data communication system capable of variable rate transmission, high rate packet data transmission improves utilization of the forward link and decreases the transmission delay. Data transmission on the forward link is time multiplexed and the base station transmits at the highest data rate supported by the forward link at each time slot to one mobile station. The data rate is determined by the largest C/I measurement of the forward link signals as measured at the mobile station. Upon determination of a data packet received in error, the mobile station transmits a NACK message back to the base station. The NACK message results in retransmission of the data packet received in error. The data packets can be transmitted out of sequence by the use of sequence number to identify each data unit within the data packets.Type: GrantFiled: December 12, 2002Date of Patent: July 18, 2006Assignee: Qualcomm, IncorporatedInventors: Roberto Padovani, Paul E. Bender, Peter J. Black, Matthew S. Grob, Jurg K. Hinderling, Nagabhushana T. Sindhushayana, Charles E. Wheatley, III