Patents by Inventor Hsin-Chung Yeh
Hsin-Chung Yeh 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: 9037773Abstract: An electronic apparatus is disclosed. The electronic apparatus comprises a random access memory (RAM), a read-only memory (ROM) and a processing unit. The RAM stores a call transfer table, wherein the call transfer table comprising at least one transferred address in the RAM. The ROM stores at least one code to call one address of the call transfer table. The processing unit executes the code in the ROM and reads the transfer table accordingly, then transfers to run the data in the transferred address of the RAM.Type: GrantFiled: December 16, 2008Date of Patent: May 19, 2015Assignee: MEDIATEK INC.Inventors: Hsin-Chung Yeh, Cheng Huang Wu
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Patent number: 8836576Abstract: A method and system for navigation are provided to locate a GNSS device. The GNSS device comprises a RF front end receiving satellite signals of a plurality of satellites, and a GNSS device comprising a plurality of correlation channels each performing a correlation process to generate a correlation result from satellite signals corresponding to a satellite, a memory device for storage of the correlation results, and a processor performing acquisition and tracking based on the correlation results.Type: GrantFiled: October 27, 2008Date of Patent: September 16, 2014Assignee: Mediatek Inc.Inventors: Hsin-Chung Yeh, Chi Ya Lo
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Publication number: 20130063305Abstract: A frequency calibration method and a satellite positioning system utilizing the frequency calibration method are disclosed. The frequency calibration method includes the following steps: detecting a plurality of chip state parameters; and determining a frequency drift and a frequency variation of a target signal according to the detected chip state parameters.Type: ApplicationFiled: March 8, 2012Publication date: March 14, 2013Inventors: Chi-Yeh Lo, Hsin-Chung Yeh
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Patent number: 8339313Abstract: A positioning method is provided, particularly adaptable for a mobile device. Satellite signals are first received from at least one satellites. At least one first search process is performed on the satellite signals by using an adjustable integration time. A tracking process is then performed when the at least one satellite is acquired in the at least one search process.Type: GrantFiled: January 13, 2009Date of Patent: December 25, 2012Assignee: Mediatek Inc.Inventors: Hsin-Chung Yeh, Yuan Wen Ting
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Patent number: 8238490Abstract: A method for determining a Doppler shift of a first signal is provided. First, a plurality of Doppler frequency hypotheses is combined to obtain a joint Doppler signal. The first signal is the correlated according to the joint Doppler signal and a plurality of code signals with phases corresponding to a series of code phase hypotheses to obtain a series of correlation results which are then examined to determine whether the Doppler shift does lie in the Doppler hypotheses. A fine Doppler search is then performed to determine the Doppler shift when the Doppler shift lies in the Doppler hypotheses.Type: GrantFiled: February 25, 2009Date of Patent: August 7, 2012Assignee: Mediatek Inc.Inventors: Hsin-Chung Yeh, Kuan-I Li
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Patent number: 8090002Abstract: A spreading signal acquisition and tracking method and apparatus is proposed. In accordance with the present invention, coherent integrations are performed by segments and stored for a non-coherent integration. A better freedom of the non-coherent interval selection is provided. The window of the non-coherent integration is sequentially and gradually shifted to achieve better update rate to its detection circuit and to improve searching and tracking for a spreading signal. By using the present invention, rapid signal acquisition can be achieved even when intensity of the spreading signal is very weak, or even when deeper signal blocking or jamming occurs.Type: GrantFiled: March 7, 2007Date of Patent: January 3, 2012Assignee: Mediatek Inc.Inventor: Hsin-Chung Yeh
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Patent number: 8059699Abstract: Disclosed is a low power consumption GNSS receiver by adaptively adjusting clock frequency. A correlator performs correlations to signals received from the channels with a correlator clock frequency. A DSP controls the correlator clock frequency according to a correlator load to performing correlations. The DSP calculates and adjusts code phases and Doppler frequencies for the signals in turn with a DSP clock frequency. The DSP controls the DSP clock frequency according to an accumulated throughput of calculation and adjustment or a predetermined threshold number of channels. The DSP controls the RF power according to the correlator load. A microprocessor processes a measurement result of the calculation and the adjustment for obtaining position information with a microprocessor clock frequency. The microprocessor controls the microprocessor clock frequency according to an accumulated progress of processing the measurement result. Accordingly, reducing power consumption for the GNSS receiver can be realized.Type: GrantFiled: May 11, 2007Date of Patent: November 15, 2011Assignee: Mediatek Inc.Inventors: Hsin-chung Yeh, Ming-hung Lee, Zong-hua You
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Patent number: 7930488Abstract: A non-volatile memory sharing system is provided. The non-volatile memory sharing system includes a plurality of processors comprising at least a first processor and a second processor, a non-volatile memory, and a processor bridge coupled between the first processor and the second processor. The non-volatile memory is coupled to the first processor, and is used for storing a plurality of program codes or data comprising at least a first program code or data for the first processor and a second program code or data for the second processor. The first processor is for executing the first program code stored in the non-volatile memory, and the second processor is for obtaining the second program code or data from the non-volatile memory via the first processor and the processor bridge.Type: GrantFiled: September 22, 2008Date of Patent: April 19, 2011Assignee: Mediatek Inc.Inventor: Hsin-Chung Yeh
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Patent number: 7903600Abstract: A method for controlling integration for a CDMA signal and a receiver implementing the same. In accordance with the present invention, non-coherent and even coherent integration periods for a received signal are dynamically and adaptively controlled depending upon the condition of the received signal. The integration period can be very short when signal strength is strong and no blocking exists; while it can be extended to be longer when the signal strength is weak or there is a blocking. Therefore, it is possible to keep locking even under bad circumstances. In addition, the fix time can be shortened when the signal strength is very strong.Type: GrantFiled: July 5, 2007Date of Patent: March 8, 2011Assignee: MEDIATEK Inc.Inventors: Hsin-chung Yeh, Zong-hua You
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Publication number: 20100214172Abstract: A method for determining a Doppler shift of a first signal is provided. First, a plurality of Doppler frequency hypotheses is combined to obtain a joint Doppler signal. The first signal is the correlated according to the joint Doppler signal and a plurality of code signals with phases corresponding to a series of code phase hypotheses to obtain a series of correlation results which are then examined to determine whether the Doppler shift does lie in the Doppler hypotheses. A fine Doppler search is then performed to determine the Doppler shift when the Doppler shift lies in the Doppler hypotheses.Type: ApplicationFiled: February 25, 2009Publication date: August 26, 2010Applicant: MEDIATEK INC.Inventors: Hsin-Chung Yeh, Kuan-I Li
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Publication number: 20100207813Abstract: A frequency variation determining method determines a frequency variation of a target signal of a chip. The method comprises: (a) determining an operation state according to a plurality of chip state parameters; and (b) determining the frequency variation of the target signal according to the operation state.Type: ApplicationFiled: February 18, 2009Publication date: August 19, 2010Inventors: Chi-Ya Lo, Hsin-Chung Yeh
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Publication number: 20100178930Abstract: A positioning method is provided, particularly adaptable for a mobile device. Satellite signals are first received from at least one satellites. At least one first search process is performed on the satellite signals by using an adjustable integration time. A tracking process is then performed when the at least one satellite is acquired in the at least one search process.Type: ApplicationFiled: January 13, 2009Publication date: July 15, 2010Applicant: MEDIATEK INC.Inventors: Hsin-Chung Yeh, Yuan Wen Ting
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Publication number: 20100153619Abstract: An electronic apparatus is disclosed. The electronic apparatus comprises a random access memory (RAM), a read-only memory (ROM) and a processing unit. The RAM stores a call transfer table, wherein the code transfer table comprising at least one transferred address in the RAM. The ROM stores at least one code to call one address of the code transfer table. The processing unit executes the code in the ROM and reads the transfer table accordingly, then transfers to run the data in the transferred address of the RAM.Type: ApplicationFiled: December 16, 2008Publication date: June 17, 2010Applicant: MEDIATEK INC.Inventors: Hsin-Chung Yeh, Cheng Huang Wu
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Publication number: 20100103038Abstract: A method and system for navigation are provided to locate a GNSS device. The GNSS device comprises a RF front end receiving satellite signals of a plurality of satellites, and a GNSS device comprising a plurality of correlation channels each performing a correlation process to generate a correlation result from satellite signals corresponding to a satellite, a memory device for storage of the correlation results, and a processor performing acquisition and tracking based on the correlation results.Type: ApplicationFiled: October 27, 2008Publication date: April 29, 2010Applicant: MEDIATEK INC.Inventors: Hsin-Chung Yeh, Chi Ya Lo
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Patent number: 7664477Abstract: A communications system includes a first oscillator for producing a first clock signal; a second oscillator for producing a second clock signal; and a secondary circuit coupled to the first oscillator and the second oscillator for determining a second oscillation frequency corresponding to a frequency of the second clock signal; the second oscillation signal being determined according to the first clock signal, the second clock signal, and a first oscillation frequency corresponding to a frequency of the first clock signal.Type: GrantFiled: December 20, 2006Date of Patent: February 16, 2010Assignee: Mediatek Inc.Inventor: Hsin-Chung Yeh
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Patent number: 7586441Abstract: Methods and apparatuses for searching for satellite signals are provided. One of the proposed methods of searching for satellite signals includes: searching for satellite signals according to measurement predictions; searching for satellite signals of a reference satellite without referring to the measurement predictions; determining if measurements derived from the reference satellite are consistent with the measurement predictions; and searching for satellite signals of other satellites without referring to the measurement predictions if the measurements derived from the reference satellite are determined to be inconsistent with the measurement predictions. If the measurements derived from the reference satellite are determined to be inconsistent with the measurement predictions, navigation information for use in the generation of the measurement predictions is determined to be stale.Type: GrantFiled: June 27, 2007Date of Patent: September 8, 2009Assignee: Mediatek Inc.Inventors: Kung-Shuan Huang, Wen-Cheng Lai, Hsin-Chung Yeh
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Publication number: 20090045945Abstract: An apparatus includes a first oscillator; a first counter coupled to the first oscillator for counting cycles of a signal generated from the first oscillator to thereby generate a cycle number of the first oscillator; a second oscillator; a second counter coupled to the second oscillator for counting cycles of a signal generated from the second oscillator to thereby generate a cycle number of the second oscillator; and a processor coupled to the first counter and the second counter, for determining a formula to model the cycle number of the first oscillator according to the cycle number of the second oscillator, and utilizing the formula and a current cycle number of the second oscillator to obtain a prospect current cycle number of the first oscillator.Type: ApplicationFiled: August 13, 2007Publication date: February 19, 2009Inventor: Hsin-Chung Yeh
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Publication number: 20090024802Abstract: A non-volatile memory sharing system is provided. The non-volatile memory sharing system includes a plurality of processors comprising at least a first processor and a second processor, a non-volatile memory, and a processor bridge coupled between the first processor and the second processor. The non-volatile memory is coupled to the first processor, and is used for storing a plurality of program codes or data comprising at least a first program code or data for the first processor and a second program code or data for the second processor. The first processor is for executing the first program code stored in the non-volatile memory, and the second processor is for obtaining the second program code or data from the non-volatile memory via the first processor and the processor bridge.Type: ApplicationFiled: September 22, 2008Publication date: January 22, 2009Inventor: Hsin-Chung Yeh
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Publication number: 20090010239Abstract: A method for controlling integration for a CDMA signal and a receiver implementing the same. In accordance with the present invention, non-coherent and even coherent integration periods for a received signal are dynamically and adaptively controlled depending upon the condition of the received signal. The integration period can be very short when signal strength is strong and no blocking exists; while it can be extended to be longer when the signal strength is weak or there is a blocking. Therefore, it is possible to keep locking even under bad circumstances. In addition, the fix time can be shortened when the signal strength is very strong.Type: ApplicationFiled: July 5, 2007Publication date: January 8, 2009Applicant: MEDIATEK Inc.Inventors: Hsin-chung Yeh, Zong-hua You
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Publication number: 20090002233Abstract: Methods and apparatuses for searching for satellite signals are provided. One of the proposed methods of searching for satellite signals includes: searching for satellite signals according to measurement predictions; searching for satellite signals of a reference satellite without referring to the measurement predictions; determining if measurements derived from the reference satellite are consistent with the measurement predictions; and searching for satellite signals of other satellites without referring to the measurement predictions if the measurements derived from the reference satellite are determined to be inconsistent with the measurement predictions. If the measurements derived from the reference satellite are determined to be inconsistent with the measurement predictions, navigation information for use in the generation of the measurement predictions is determined to be stale.Type: ApplicationFiled: June 27, 2007Publication date: January 1, 2009Inventors: Kung-Shuan Huang, Wen-Cheng Lai, Hsin-Chung Yeh