Patents by Inventor Sung-Chiao Li
Sung-Chiao Li 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: 20230216569Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a device. The device applies Nso sensing beam vectors to Nso received signals at Nant antennas to obtain Nso measurements, respectively, Nso and Nant each being an integer greater than or equal to 1. The device determines a beam vector based on the Nso measurements and the Nso sensing beam vectors.Type: ApplicationFiled: December 19, 2022Publication date: July 6, 2023Inventors: Chong-You Lee, Jiaxian Pan, Yabo Li, Wei-Jen Chen, Wei-Hsuan Hsieh, Feng Chiu, Da-chun Hsing, Sung-Chiao Li
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Patent number: 9681391Abstract: A power adaptation apparatus for a wireless communication channel includes a power ratio compensator. The power ratio compensator is capable of receiving a channel quality indicator and compensating a power ratio parameter according to the channel quality indicator, wherein the power ratio parameter defines a relation between power of the wireless communication channel and power of another wireless communication channel, and is referenced for setting the power of the wireless communication channel.Type: GrantFiled: October 6, 2015Date of Patent: June 13, 2017Assignee: MEDIATEK INC.Inventors: Po-Shen Weng, Yuan Ho, Sung-Chiao Li, Chen-Wei Hsu, Wen-Hsien Ho, Qian-Zhi Huang
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Publication number: 20160037457Abstract: A power adaptation apparatus for a wireless communication channel includes a power ratio compensator. The power ratio compensator is capable of receiving a channel quality indicator and compensating a power ratio parameter according to the channel quality indicator, wherein the power ratio parameter defines a relation between power of the wireless communication channel and power of another wireless communication channel, and is referenced for setting the power of the wireless communication channel.Type: ApplicationFiled: October 6, 2015Publication date: February 4, 2016Inventors: Po-Shen Weng, Yuan Ho, Sung-Chiao Li, Chen-Wei Hsu, Wen-Hsien Ho, Qian-Zhi Huang
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Patent number: 9185660Abstract: A power adaptation apparatus for a wireless communication channel includes a power ratio compensator. The power ratio compensator is capable of receiving a channel quality indicator and compensating a power ratio parameter according to the channel quality indicator, wherein the power ratio parameter defines a relation between power of the wireless communication channel and power of another wireless communication channel, and is referenced for setting the power of the wireless communication channel.Type: GrantFiled: February 6, 2012Date of Patent: November 10, 2015Assignee: MEDIATEK INC.Inventors: Po-Shen Weng, Yuan Ho, Sung-Chiao Li, Chen-Wei Hsu, Wen-Hsien Ho, Qian-Zhi Huang
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Publication number: 20140092798Abstract: An embodiment of the invention provides a method performed by a mobile communication device in a discontinuous reception (DRX) mode. First, the device dumps contemporarily received data and performs multipath search while a beginning part of a relevant sub-frame in a control channel is being transmitted. Next, the device dumps contemporarily received data and decodes dumped data with an accelerated rake while a middle part of the relevant sub-frame is being transmitted. Then, the device decodes contemporarily received data with a normal rake while an ending part of the relevant sub-frame is being transmitted.Type: ApplicationFiled: September 30, 2012Publication date: April 3, 2014Applicant: MEDIATEK INC.Inventors: Wei-Jen Chen, Lun-Han Chang, Sung-Chiao Li, Wei-Nan Sun
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Publication number: 20120269078Abstract: A power adaptation apparatus for a wireless communication channel includes a power ratio compensator. The power ratio compensator is capable of receiving a channel quality indicator and compensating a power ratio parameter according to the channel quality indicator, wherein the power ratio parameter defines a relation between power of the wireless communication channel and power of another wireless communication channel, and is referenced for setting the power of the wireless communication channel.Type: ApplicationFiled: February 6, 2012Publication date: October 25, 2012Inventors: Po-Shen Weng, Yuan Ho, Sung-Chiao Li, Chen-Wei Hsu, Wen-Hsien Ho, Qian-Zhi Huang
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Patent number: 7822108Abstract: The invention provides a Code Division Multiple Access (CDMA) receiver for sampling a received CDMA signal into a plurality of samples. The CDMA receiver comprises a sampling control module, a code generator, and a plurality of despreaders. The sampling control module delays the samples for a plurality of different delay lengths to obtain a plurality of delayed samples respectively corresponding to each of the delay lengths, and adjusts timing of a sampling trigger signal and a code generation trigger signal according to a sampling timing adjustment signal. The code generator generates a despreading code according to the code generation trigger signal. Each of the despreaders is configured for decimating the delayed samples corresponding to each delay lengths according to the sampling trigger signal to obtain a plurality of decimated delayed samples, and despreads the decimated delayed samples with the despreading code to obtain a plurality of output signals.Type: GrantFiled: January 12, 2007Date of Patent: October 26, 2010Assignee: Via Technologies, Inc.Inventors: Sung-Chiao Li, Ching-Chia Hsu, Chi-Yuan Peng
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Patent number: 7764728Abstract: An apparatus for determining multipath correlations among a search range of input data, and a method thereof. The multipath searcher comprises a pseudo noise (PN) code generator, a correlator, and a data combiner. The PN code generator generates a first PN code corresponding to a first multipath component of the input data, postpones a first period based on the search range, then generates a second PN code corresponding to a second multipath component of the input data. The correlator is coupled to the PN code generator, and correlates the input data with the first PN code and the second PN code to produce a first correlation and a second correlation. The data combiner is coupled to the correlator, receives the first and the second correlations to determine a primary multipath component with a higher correlation thereto.Type: GrantFiled: October 18, 2006Date of Patent: July 27, 2010Assignee: Via Technologies, Inc.Inventors: Sung-Chiao Li, Huoy Bing Lim, Ching-Chia Hsu, Yu-Lin Wang
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Patent number: 7689739Abstract: An apparatus, spread spectrum receiver, and method of controlling a circular buffer, comprising a circular buffer and a controller coupled thereto. The circular buffer receives first data at a first data rate and second data at a second data rate. The controller determines a first range in the circular buffer based on the first data rate and a first time difference between the first write and first read speed, accesses the first data in the first range, estimates a second range in the circular buffer based on the second data rate and a second time difference between the first write and first read speed, and accesses the second data in the second range, where the second range is larger than and partially covered by the first range.Type: GrantFiled: July 10, 2006Date of Patent: March 30, 2010Assignee: Via Technologies, Inc.Inventors: Sung-Chiao Li, Johnson Sebeni, Eric Pan, Huoy Bing Lim
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Publication number: 20080095278Abstract: An apparatus for determining multipath correlations among a search range of input data, and a method thereof. The multipath searcher comprises a pseudo noise (PN) code generator, a correlator, and a data combiner. The PN code generator generates a first PN code corresponding to a first multipath component of the input data, postpones a first period based on the search range, then generates a second PN code corresponding to a second multipath component of the input data. The correlator is coupled to the PN code generator, and correlates the input data with the first PN code and the second PN code to produce a first correlation and a second correlation. The data combiner is coupled to the correlator, receives the first and the second correlations to determine a primary multipath component with a higher correlation thereto.Type: ApplicationFiled: October 18, 2006Publication date: April 24, 2008Applicant: VIA TECHNOLOGIES, INC.Inventors: Sung-Chiao Li, Huoy Bing Lim, Ching-Chia Hsu, Yu-Lin Wang
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Publication number: 20070165706Abstract: The invention provides a Code Division Multiple Access (CDMA) receiver for sampling a received CDMA signal into a plurality of samples. The CDMA receiver comprises a sampling control module, a code generator, and a plurality of despreaders. The sampling control module delays the samples for a plurality of different delay lengths to obtain a plurality of delayed samples respectively corresponding to each of the delay lengths, and adjusts timing of a sampling trigger signal and a code generation trigger signal according to a sampling timing adjustment signal. The code generator generates a despreading code according to the code generation trigger signal. Each of the despreaders is configured for decimating the delayed samples corresponding to each delay lengths according to the sampling trigger signal to obtain a plurality of decimated delayed samples, and despreads the decimated delayed samples with the despreading code to obtain a plurality of output signals.Type: ApplicationFiled: January 12, 2007Publication date: July 19, 2007Applicant: VIA TECHNOLOGIES, INC.Inventors: Sung-Chiao Li, Ching-Chia Hsu, Chi-Yuan Peng
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Patent number: 7246298Abstract: A Viterbi/Turbo unified decoder supports both voice and data streams due to the ability of performing Viterbi (convolutional) decoding and Turbo decoding. The Viterbi/Turbo unified decoder of an embodiment reduces the hardware cost by computing path metrics for both Viterbi and Turbo decoding using a single control circuit. The control circuit comprises a plurality of processors and memory banks, and the routing rule for the processors to read/write the path metric information from/to the memory banks are fixed for both Viterbi and Turbo coded inputs.Type: GrantFiled: November 17, 2004Date of Patent: July 17, 2007Assignee: VIA Technologies, Inc.Inventors: Tzi-Dar Chiueh, Sung-Chiao Li, Chan-Shih Lin
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Patent number: 7218664Abstract: A method of path gain estimation for a downlink WCDMA system. The present invention further provides a system for realizing the path gain estimation method. A transmitting device of the system comprises a first and a second antenna to transmit signals with the space time transmit diversity (STTD) scheme. The first and second antennas transmit common pilot channel (CPICH) symbols that are orthogonal to each other, and the CPICH symbols are received by a single antenna of a receiving device. The receiving device then determines the path gain by a STTD filter coefficient determination process, which includes a block selection process for selecting a combination of the CPICH symbol and a tap gain determination process for determining equations for estimating the path gain of the system.Type: GrantFiled: March 17, 2004Date of Patent: May 15, 2007Assignee: Via Technologies Inc.Inventors: Ming-Luen Liou, Sung-Chiao Li
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Publication number: 20070022230Abstract: An apparatus, spread spectrum receiver, and method of controlling a circular buffer, comprising a circular buffer and a controller coupled thereto. The circular buffer receives first data at a first data rate and second data at a second data rate. The controller determines a first range in the circular buffer based on the first data rate and a first time difference between the first write and first read speed, accesses the first data in the first range, estimates a second range in the circular buffer based on the second data rate and a second time difference between the first write and first read speed, and accesses the second data in the second range, where the second range is larger than and partially covered by the first range.Type: ApplicationFiled: July 10, 2006Publication date: January 25, 2007Applicant: VIA TECHNOLOGIES, INC.Inventors: Sung-Chiao Li, Johnson Sebeni, Eric Pan, Huoy Bing Lim
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Publication number: 20050149838Abstract: A Viterbi/Turbo unified decoder supports both voice and data streams due to the ability of performing Viterbi (convolutional) decoding and Turbo decoding. The Viterbi/Turbo unified decoder of an embodiment reduces the hardware cost by computing path metrics for both Viterbi and Turbo decoding using a single control circuit. The control circuit comprises a plurality of processors and memory banks, and the routing rule for the processors to read/write the path metric information from/to the memory banks are fixed for both Viterbi and Turbo coded inputs.Type: ApplicationFiled: November 17, 2004Publication date: July 7, 2005Inventors: Tzi-Dar Chiueh, Sung-Chiao Li, Chan-Shih Lin
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Patent number: 6904087Abstract: A method of adaptive multi-modulus equalization for an equalizer. A cost from a cost function is calculated according to a constant modulus algorithm (CMA). Equalizer coefficients are updated according to the cost, and modulus of each region is determined for a multi-modulus algorithm (MMA). The equalizer is switched to use the MMA when the cost reaches a first threshold. The MMA comprises several stages determined by thresholds, and the number of regions increases in every stage. The cost is calculated according to the MMA and modulus of each region. The equalizer coefficients are updated according to the cost, and modulus of each region is determined for the subsequent stage of the MMA. The equalizer is switched to the subsequent stage of the MMA when the MMA cost function output reaches the threshold corresponding to the current stage. The steps are repeated until the cost reaches a preset value. Then, the number of regions and equalizer coefficients are fixed to equalize the input signal.Type: GrantFiled: September 9, 2003Date of Patent: June 7, 2005Assignee: Via Technologies, Inc.Inventor: Sung-Chiao Li
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Publication number: 20050089111Abstract: A method of path gain estimation for a downlink WCDMA system. The present invention further provides a system for realizing the path gain estimation method. A transmitting device of the system comprises a first and a second antenna to transmit signals with the space time transmit diversity (STTD) scheme. The first and second antennas transmit common pilot channel (CPICH) symbols that are orthogonal to each other, and the CPICH symbols are received by a single antenna of a receiving device. The receiving device then determines the path gain by a STTD filter coefficient determination process, which includes a block selection process for selecting a combination of the CPICH symbol and a tap gain determination process for determining equations for estimating the path gain of the system.Type: ApplicationFiled: March 17, 2004Publication date: April 28, 2005Inventors: Ming-Luen Liou, Sung-Chiao Li
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Publication number: 20040052309Abstract: A method of adaptive multi-modulus equalization for an equalizer. A cost from a cost function is calculated according to a constant modulus algorithm (CMA). Equalizer coefficients are updated according to the cost, and modulus of each region is determined for a multi-modulus algorithm (MMA). The equalizer is switched to use the MMA when the cost reaches a first threshold. The MMA comprises several stages determined by thresholds, and the number of regions increases in every stage. The cost is calculated according to the MMA and modulus of each region. The equalizer coefficients are updated according to the cost, and modulus of each region is determined for the subsequent stage of the MMA. The equalizer is switched to the subsequent stage of the MMA when the MMA cost function output reaches the threshold corresponding to the current stage. The steps are repeated until the cost reaches a preset value. Then, the number of regions and equalizer coefficients are fixed to equalize the input signal.Type: ApplicationFiled: September 9, 2003Publication date: March 18, 2004Inventor: Sung-Chiao Li