Patents by Inventor Qingzhong Jiao
Qingzhong Jiao 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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Publication number: 20110319124Abstract: A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. A power supply level adjustment signal is generated based on the data parameters of an outgoing data stream and at least one environmental information signal. A combination of the power supply level adjustment signal and the average desired transmit power or a gain control signal and an altered version of the power supply level adjustment signal is used to generate a variable power supply signal that is provided to an output amplifier block for sufficiently generating outgoing wireless device radio signals while reducing power loss in the output amplifier block.Type: ApplicationFiled: July 28, 2011Publication date: December 29, 2011Applicant: RESEARCH IN MOTION LIMITEDInventors: Wen-Yen Chan, Nasserullah Khan, Qingzhong Jiao, Xin Jin, Nagula Tharma Sangary, Michael Franz Habicher
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Patent number: 8000656Abstract: Various embodiments for performing calibration of a mobile computing device are described. In one or more embodiments, a device under test and a calibration test bench may be coupled by at least one of a wireless connection and a wired connection. The device under test may be arranged to receive one or more test command instructions from the calibration test bench and, in response, send an acknowledgment to the calibration test bench. In some embodiments, the device under test and the calibration test bench may be arranged to communicate according to a wireless device calibration protocol. Other embodiments are described and claimed.Type: GrantFiled: December 19, 2006Date of Patent: August 16, 2011Assignee: Hewlett-Packard Development Company, L.P.Inventors: Qingzhong Jiao, Wen Zhao, Isabel Mahe
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Patent number: 8000409Abstract: A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. A power supply level adjustment signal is generated based on the data parameters of an outgoing data stream and at least one environmental information signal. A combination of the power supply level adjustment signal and the average desired transmit power or a gain control signal and an altered version of the power supply level adjustment signal is used to generate a variable power supply signal that is provided to an output amplifier block for sufficiently generating outgoing wireless device radio signals while reducing power loss in the output amplifier block.Type: GrantFiled: July 30, 2010Date of Patent: August 16, 2011Assignee: Research In Motion LimitedInventors: Wen-Yen Chan, Nasserullah Khan, Qingzhong Jiao, Xin Jin, Nagula Tharma Sangary, Michael Franz Habicher
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Publication number: 20110149917Abstract: It has now been found that in some transmitter implementations which transmit multiple code channels, for example CDMA transmitters, the observed power for each code channel at the output relative to the other code channels is dependent upon the total transmit power due to non-linearities in the transmitter. Methods and apparatus are provided which use pre-set digital gains or digital gain adjustments to compensate for the non-linearities as a function of total transmit power such that at the output, the desired relative powers are observed.Type: ApplicationFiled: February 28, 2011Publication date: June 23, 2011Inventors: XIN JIN, WEN ZHAO, QINGZHONG JIAO
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Publication number: 20110141977Abstract: A method and apparatus for improved timer based registration for a mobile device with a network, the network having a standard slot cycle time for interrupts, the method comprising the steps of: receiving, at the mobile device, a system parameter message from the network, the message having a value indicating a frequency for periodic registration; setting a timer value on a timer at the mobile device, the timer value being greater than the standard slot cycle time; setting a counter to count expiration of the timer; starting the timer; upon expiration of the timer, decrementing the counter; upon the counter reaching zero, waiting for a paging slot to communicate with the network; and sending a registration message to the network on the paging slot.Type: ApplicationFiled: February 22, 2011Publication date: June 16, 2011Applicant: RESEARCH IN MOTION LIMITEDInventors: Qingzhong JIAO, Wen ZHAO
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Publication number: 20110130105Abstract: A transmitter for a mobile device utilizes at least one mapper in order to improve power efficiency while still meeting out of band spurious emissions and waveform quality requirements. An encoder and modulator generates an encoded and modulated transmit signal from an input signal. A digital to analog converter coupled to the encoder and modulator generates an analog representation of the encoded and modulated transmit signal. An amplifier stage coupled to the digital to analog converter amplifies the analog representation of the encoded and modulated transmit signal to generate a transmission signal. The transmitter further comprises an amplifier control block configured to generate an amplifier control signal for adjusting at least one parameter of the amplifier stage. At least one mapper is provided in the amplifier control block, used to determine the amplifier control signal based on a peak to average power ratio and an average transmit power of the transmission signal.Type: ApplicationFiled: May 21, 2010Publication date: June 2, 2011Applicant: RESEARCH IN MOTION LIMITEDInventors: Wen-Yen Chan, Nasserullah Khan, Xin Jin, Qingzhong Jiao
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Patent number: 7917143Abstract: A method and apparatus for improved timer based registration for a mobile device with a network, the network having a standard slot cycle time for interrupts, the method comprising the steps of: receiving, at the mobile device, a system parameter message from the network, the message having a value indicating a frequency for periodic registration; setting a timer value on a timer at the mobile device, the timer value being greater than the standard slot cycle time; setting a counter to count expiration of the timer; starting the timer; upon expiration of the timer, decrementing the counter; upon the counter reaching zero, waiting for a paging slot to communicate with the network; and sending a registration message to the network on the paging slot.Type: GrantFiled: September 12, 2007Date of Patent: March 29, 2011Assignee: Research In Motion LimitedInventors: Qingzhong Jiao, Wen Zhao
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Patent number: 7912463Abstract: The application relates to wireless networks and more particularly to a method of reducing factory test time of receiver sensitivity in a Code Division Multiple Access (CDMA) wireless device. Under TIA/EIA/-98E, the radio frequency (RF) sensitivity of a CDMA wireless receiver is the minimum received power, measured at the mobile station antenna connector, at which the frame error rate (FER) does not exceed 0.5% with 95% confidence. In order to reduce the test time of FER test method, the relation between correlated energy (or Ec/Io) and FER is determined using simulated traffic and the correlated energy (or Ec/Io) measurement is then used as the test parameter on like models to achieve the same or superior test confidence with significantly reduced test time.Type: GrantFiled: January 15, 2009Date of Patent: March 22, 2011Assignee: Research In Motion LimitedInventors: Xin Jin, Jennifer Mallalieu, Qingzhong Jiao, Ronald Bruce Harding
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Publication number: 20110053542Abstract: Techniques for controlling a gain state of a wireless receiver involve causing the wireless receiver to enter into a sleep mode; causing the wireless receiver to exit from the sleep mode and enter into a wake-up period; providing, via a multiplexer, a stored gain control state value to the wireless receiver for use during a warm-up period of the wake-up period, the stored gain control state value being previously read from a gain controller during a previous wake-up period of the wireless receiver; and after the warm-up period of the wake up period, providing, via the multiplexer, a current gain control state value from the gain controller to the wireless receiver for use during the wake up period, the current gain control state value being based on a signal level of a currently-received signal in the wireless receiver.Type: ApplicationFiled: November 9, 2010Publication date: March 3, 2011Applicant: Research In Motion LimitedInventors: Xin Jin, Qingzhong Jiao, Tom Yun Sang Young
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Patent number: 7899419Abstract: It has now been found that in some transmitter implementations which transmit multiple code channels, for example CDMA transmitters, the observed power for each code channel at the output relative to the other code channels is dependent upon the total transmit power due to non-linearities in the transmitter. Methods and apparatus are provided which use pre-set digital gains or digital gain adjustments to compensate for the non-linearities as a function of total transmit power such that at the output, the desired relative powers are observed.Type: GrantFiled: January 10, 2008Date of Patent: March 1, 2011Assignee: Research In Motion LimitedInventors: Xin Jin, Wen Zhao, Qingzhong Jiao
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Patent number: 7853230Abstract: The settling time of a wireless receiver is reduced by providing a previously utilized gain control state value to an amplifier of a receiver front end during a warm-up portion of a wake-up period of the wireless receiver which follows a sleep period. One illustrative method includes the steps of receiving a notification signal which indicates that the wireless receiver is to be placed in a sleep mode, reading a gain control state value from a gain controller based on receiving the notification signal, storing the gain control state value in memory, providing the stored gain control state value from the memory to the wireless receiver during a warm-up period of a second wake-up period following the first wake-up period, and providing a gain control state value from the gain controller to the wireless receiver based on a signal level of a currently received signal of the wireless receiver after the warm-up period.Type: GrantFiled: November 10, 2008Date of Patent: December 14, 2010Assignee: Research In Motion LimitedInventors: Xin Jin, Qingzhong Jiao, Tom Yun Sang Young
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Patent number: 7852968Abstract: A peak to average power ratio signal is generated from a first mapping function that selects the peak to average power ratio signal that corresponds to the data rate or data format of the signal to be transmitted. The selected peak to average power ratio signal is summed with a desired average transmit power signal. The resulting summation signal is input to a second effectively continuously valued mapping function comprising a table that has a plurality of power amplifier control signal values each with a corresponding peak transmit power. Each peak transmit power signal value results in a power amplifier control signal value that achieves the best possible transmitter power efficiency while still meeting out of band spurious emissions and waveform quality requirements. The summation signal value maps to one of the power amplifier control signal value that is then used to adjust a parameter such as bias of the power amplifier.Type: GrantFiled: November 24, 2008Date of Patent: December 14, 2010Assignee: Research In Motion LimitedInventors: Wen Yen Chan, Xin Jin, Qingzhong Jiao
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Publication number: 20100291887Abstract: A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. A power supply level adjustment signal is generated based on the data parameters of an outgoing data stream and at least one environmental information signal. A combination of the power supply level adjustment signal and the average desired transmit power or a gain control signal and an altered version of the power supply level adjustment signal is used to generate a variable power supply signal that is provided to an output amplifier block for sufficiently generating outgoing wireless device radio signals while reducing power loss in the output amplifier block.Type: ApplicationFiled: July 30, 2010Publication date: November 18, 2010Applicant: RESEARCH IN MOTION LIMITEDInventors: Wen-Yen Chan, Nasserullah Khan, Qingzhong Jiao, Xin Jin, Nagula Tharma Sangary, Michael Franz Habicher
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Patent number: 7787566Abstract: A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. A power supply level adjustment signal is generated based on the data parameters of an outgoing data stream and at least one environmental information signal. A combination of the power supply level adjustment signal and the average desired transmit power or a gain control signal and an altered version of the power supply level adjustment signal is used to generate a variable power supply signal that is provided to an output amplifier block for sufficiently generating outgoing wireless device radio signals while reducing power loss in the output amplifier block.Type: GrantFiled: June 5, 2009Date of Patent: August 31, 2010Assignee: Research In Motion LimitedInventors: Wen-Yen M. Chan, Nasserullah Khan, Qingzhong Jiao, Nagula Tharma Sangary, Michael Franz Habicher, Xin Jin
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Publication number: 20090245419Abstract: A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. A power supply level adjustment signal is generated based on the data parameters of an outgoing data stream and at least one environmental information signal. A combination of the power supply level adjustment signal and the average desired transmit power or a gain control signal and an altered version of the power supply level adjustment signal is used to generate a variable power supply signal that is provided to an output amplifier block for sufficiently generating outgoing wireless device radio signals while reducing power loss in the output amplifier block.Type: ApplicationFiled: June 5, 2009Publication date: October 1, 2009Applicant: RESEARCH IN MOTION LIMITEDInventors: Wen-Yen Chan, Nasserullah Khan, Qingzhong Jiao, Xin Jin, Nagula Tharma Sangary, Michael Franz Habicher
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Patent number: 7551689Abstract: A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. A power supply level adjustment signal is generated based on the data parameters of an outgoing data stream and at least one environmental information signal. A combination of the power supply level adjustment signal and the average desired transmit power or a gain control signal and an altered version of the power supply level adjustment signal is used to generate a variable power supply signal that is provided to an output amplifier block for sufficiently generating outgoing wireless device radio signals while reducing power loss in the output amplifier block.Type: GrantFiled: February 4, 2008Date of Patent: June 23, 2009Assignee: Research In Motion LimitedInventors: Wen-Yen M. Chan, Nasserullah Khan, Qingzhong Jiao, Nagula Tharma Sangary, Michael Franz Habicher, Xin Jin
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Patent number: 7542764Abstract: The application relates to wireless networks and more particularly to a method of reducing factory test time of receiver sensitivity in a Code Division Multiple Access (CDMA) wireless device. Under TIA/EIA/-98E, the radio frequency (RF) sensitivity of a CDMA wireless receiver is the minimum received power, measured at the mobile station antenna connector, at which the frame error rate (FER) does not exceed 0.5% with 95% confidence. In order to reduce the test time of FER test method, the relation between correlated energy (or Ec/Io) and FER is determined using simulated traffic and the correlated energy (or Ec/Io) measurement is then used as the test parameter on like models to achieve the same or superior test confidence with significantly reduced test time.Type: GrantFiled: February 25, 2005Date of Patent: June 2, 2009Assignee: Research in Motion LimitedInventors: Xin Jin, Jennifer Mallalieu, Qingzhong Jiao, Ronald Bruce Harding
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Publication number: 20090135956Abstract: A communications subsystem for a wireless device for correcting errors in a reference frequency signal. The communications subsystem comprises a frequency generator for generating the reference frequency signal and a closed loop reference frequency correction module that generates a reference frequency adjustment signal for correcting the reference frequency signal when the communications subsystem operates in closed loop mode. The subsystem further includes an open loop frequency correction means that that samples values of the reference frequency adjustment signal during the closed loop mode and generates a frequency correction signal for correcting the reference frequency signal when the communications subsystem operates in a mode other than closed loop mode.Type: ApplicationFiled: January 30, 2009Publication date: May 28, 2009Applicant: RESEARCH IN MOTION LIMITEDInventors: Wen-Yen Chan, Xin Jin, Qingzhong Jiao, Nasserullah Khan, Nagula Tharma Sangary
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Publication number: 20090124252Abstract: The application relates to wireless networks and more particularly to a method of reducing factory test time of receiver sensitivity in a Code Division Multiple Access (CDMA) wireless device. Under TIA/EIA/-98E, the radio frequency (RF) sensitivity of a CDMA wireless receiver is the minimum received power, measured at the mobile station antenna connector, at which the frame error rate (FER) does not exceed 0.5% with 95% confidence. In order to reduce the test time of FER test method, the relation between correlated energy (or Ec/Io) and FER is determined using simulated traffic and the correlated energy (or Ec/Io) measurement is then used as the test parameter on like models to achieve the same or superior test confidence with significantly reduced test time.Type: ApplicationFiled: January 15, 2009Publication date: May 14, 2009Applicant: Research In Motion LimitedInventors: Xin Jin, Jennifer Mallalieu, Qingzhong Jiao, Ronald Bruce Harding
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Patent number: 7508888Abstract: A communications subsystem for a wireless device for correcting errors in a reference frequency signal. The communications subsystem comprises a frequency generator for generating the reference frequency signal and a closed loop reference frequency correction module that generates a reference frequency adjustment signal for correcting the reference frequency signal when the communications subsystem operates in closed loop mode. The subsystem further includes an open loop frequency correction means that that samples values of the reference frequency adjustment signal during the closed loop mode and generates a frequency correction signal for correcting the reference frequency signal when the communications subsystem operates in a mode other than closed loop mode.Type: GrantFiled: April 28, 2005Date of Patent: March 24, 2009Assignee: Research In Motion LimitedInventors: Wen-Yen Chan, Xin Jin, Qingzhong Jiao, Nasserullah Khan, Nagula Tharma Sangary