Patents by Inventor Insung Kang
Insung Kang 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: 8660217Abstract: Certain aspects of the present disclosure propose methods and apparatus for low complexity soft-in soft-out detection that divide a plurality of received symbols into a plurality of groups of symbols and performs preprocessing on the symbols in each group to suppress interference from other groups. The preprocessing may utilize a priori information for one or more symbols in one or more groups that are not yet detected, and/or a posteriori information for one or more symbols in one or more groups that are already detected and/or decoded. The preprocessed symbols may then be detected using a soft-in soft-out detection algorithm.Type: GrantFiled: November 3, 2011Date of Patent: February 25, 2014Assignee: QUALCOMM IncorporatedInventors: Jun Won Choi, Insung Kang
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Publication number: 20130329575Abstract: In certain communication systems, such as TD-HSDPA communications, channel quality index (CQI) reporting is based on a predetermined configuration, such as a mobile device (UE) reporting a CQI for a most recently received data transmission. This configuration may lead to errors if a UE reports a CQI for a certain data transmission but the base station (node B) believes the CQI corresponds to a different data transmission, such as a later transmission the UE never received due to an error processing control channel information. Offered is an indicator to accompany CQI reports. The indicator indicates to the node B which communication resource corresponds to the CQI report.Type: ApplicationFiled: June 7, 2012Publication date: December 12, 2013Applicant: QUALCOMM IncorporatedInventors: Ming Yang, Tom Chin, Qingxin Chen, Insung Kang
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Publication number: 20130331069Abstract: When a user equipment (UE) is communicating wirelessly over a wireless communication network and terminates wireless communication temporarily due to power limit constraints (such as to satisfy a specific absorption rate (SAR) threshold), the UE may maintain its radio access network (RAN) identification (ID) and domain context, in order to quickly resume wireless communication, and avoid upper layer connection setup, once the UE is no longer power limited.Type: ApplicationFiled: June 7, 2012Publication date: December 12, 2013Applicant: QUALCOMM IncorporatedInventors: Shiau-He Tsai, Insung Kang, Qingxin Chen
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Patent number: 8599677Abstract: Systems and methods for multi-user detection in a multiple access system are provided. In one aspect, an apparatus is provided. The apparatus comprises a processing unit configured to process received chips into received symbols for a plurality of users and a computation unit configured to compute a multi-user matrix using a Hadamard matrix, wherein the multi-user matrix relates user symbols for the plurality of users to the received symbols. The apparatus further comprises a detection unit configured to detect the user symbols for the plurality of users using the received symbols and the computed multi-user matrix.Type: GrantFiled: May 4, 2009Date of Patent: December 3, 2013Assignee: Qualcomm IncorporatedInventors: Wenjun Li, Yingqun Yu, Farrokh Abrishamkar, Divaydeep Sikri, Insung Kang
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Patent number: 8543881Abstract: An apparatus and method for high throughput unified turbo decoding comprising loading data from a first data window; computing a first forward state metric using the data from the first data window; storing the first forward state metric in a memory; computing a first reverse state metric using the data from the first data window; storing the first reverse state metric in the memory; and computing the log likelihood ratio (LLR) of the first forward state metric and the first reverse state metric. In one aspect, the above-mentioned steps are repeated with data from a second data window. In another aspect, extrinsic information for the first data window associated with the unified turbo decoding is computed.Type: GrantFiled: September 11, 2009Date of Patent: September 24, 2013Assignee: Qualcomm IncorporatedInventors: Insung Kang, Ju Won Park, Brian C. Bannister
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Publication number: 20130246835Abstract: A method for compensating for sleep clock slew is disclosed. The method may conserve battery power. The method includes operating in a discontinuous receive mode. A measured sleep clock slew is determined. Discontinuous receive mode parameters are adjusted based on the measured sleep clock slew. Discontinuous receive mode wake-up procedures are performed. The discontinuous receive mode parameters may include a sleep time and a search time. Other aspects, embodiments, and features are also claimed and described.Type: ApplicationFiled: September 6, 2012Publication date: September 19, 2013Applicant: QUALCOMM INCORPORATEDInventors: Amit Mahajan, Gregory Robert Lie, Insung Kang
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Publication number: 20130235958Abstract: To detect a special burst sequence, a cross correlation (C) is compared to a square root of an estimated noise variance (?) in conjunction with a threshold value (Th). In one aspect of the disclosure, the threshold value may include multiple threshold values. The multiple threshold values may be compared to an intensity or level of a special burst metric (C/?) to facilitate determination of the special burst sequence. For example, when a special burst metric C/? is greater than a second threshold value (Th2) it may be determined that a special burst sequence exists. However, when the special burst metric C/? is greater than a first threshold value (Th1), but less than the second threshold metric (Th2), it may be determined that detection of a special burst is unclear. In this case, a TFCI value may be used to confirm whether a special burst is detected.Type: ApplicationFiled: May 22, 2012Publication date: September 12, 2013Applicant: QUALCOMM IncorporatedInventors: Insung Kang, Hari Sankar
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Publication number: 20130235956Abstract: In wireless communication systems, received signal estimation and detection is computationally intensive. During such processing, received signal matrices may be conditioned prior to inversion to improve stability. In particular, code domain conditioning, followed by time domain conditioning prior to inversion results in improved receiver performance. Such code and time domain conditioning may be particularly suited to a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system where code values are not averaged out of a received signal matrix.Type: ApplicationFiled: July 3, 2012Publication date: September 12, 2013Applicant: QUAL COMM IncorporatedInventors: Qiang Shen, Fuyun Ling, Aamod Dinkar Khandekar, Sequei Anatolievich Glazko, Insung Kang, Ming Kang, Dario Fertonani, Yuheng Huang
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Publication number: 20130100885Abstract: Methods and apparatus for selectively invoking receive diversity during power-up/initial acquisition and out of service modes are disclosed. A method can include selectively enabling receive diversity based on an initial acquisition attempt by one of the receive chains in a wireless device having multiple receive chains. A method can also include enabling receive diversity based on a predetermined list of channels to be acquired. A predetermined list of channels is a subset of a plurality of channels that may be acquired. Other aspects, embodiments, and features are also claimed and described.Type: ApplicationFiled: October 2, 2012Publication date: April 25, 2013Applicant: Qualcomm IncorporatedInventors: Francis Ming-Meng Ngai, Rashad Ahmed Akbar Attar, Won Joon Choi, Stanley Tsai, Insung Kang, Jing Sun, Amir Dabbagh
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Patent number: 8290096Abstract: Method and apparatus for decoding code words received over a communication channel are disclosed. A radius-adaptive sphere decoding methodology reduces the number of operations in sphere-constrained search. Imposing probabilistic noise constraint on top of sphere constraint, particularly at an early stage, provides a more stringent necessary condition. Hence, many branches that are unlikely to be selected are removed in the early stage of sphere search. The trade-off between computational complexity and performance can be controlled by adjusting the pruning probability.Type: GrantFiled: April 14, 2008Date of Patent: October 16, 2012Assignee: QUALCOMM IncorporatedInventors: Byonghyo Shim, Insung Kang
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Publication number: 20120114084Abstract: Certain aspects of the present disclosure propose methods and apparatus for low complexity soft-in soft-out detection that divide a plurality of received symbols into a plurality of groups of symbols and performs preprocessing on the symbols in each group to suppress interference from other groups. The preprocessing may utilize a priori information for one or more symbols in one or more groups that are not yet detected, and/or a posteriori information for one or more symbols in one or more groups that are already detected and/or decoded. The preprocessed symbols may then be detected using a soft-in soft-out detection algorithm.Type: ApplicationFiled: November 3, 2011Publication date: May 10, 2012Applicant: QUALCOMM INCORPORATEDInventors: Jun Won Choi, Insung Kang
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Patent number: 8160186Abstract: Provided is automatic gain control (AGC) in which a feedback filter has a parameter that is changed based on information regarding data-packet boundaries. In one representative embodiment, the bandwidth of the filter temporarily is increased, or the time constant of the AGC filter temporarily is decreased, within a vicinity of each actual or potential packet boundary.Type: GrantFiled: March 5, 2009Date of Patent: April 17, 2012Assignee: VIA Telecom, Inc.Inventors: Insung Kang, Tarun K. Tandon
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Publication number: 20110066913Abstract: An apparatus and method for high throughput unified turbo decoding comprising loading data from a first data window; computing a first forward state metric using the data from the first data window; storing the first forward state metric in a memory; computing a first reverse state metric using the data from the first data window; storing the first reverse state metric in the memory; and computing the log likelihood ratio (LLR) of the first forward state metric and the first reverse state metric. In one aspect, the above-mentioned steps are repeated with data from a second data window. In another aspect, extrinsic information for the first data window associated with the unified turbo decoding is computed.Type: ApplicationFiled: September 11, 2009Publication date: March 17, 2011Applicant: QUALCOMM IncorporatedInventors: Insung Kang, Ju Won Park, Brian C. Banister
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Patent number: 7885669Abstract: A method and system is disclosed for detecting indicators using a multi-stage and multi-threshold detection mechanism so that a mobile terminal can be removed from an idle mode appropriately.Type: GrantFiled: July 27, 2007Date of Patent: February 8, 2011Assignee: VIA Technologies, Inc.Inventors: Hong kui Yang, Jing Su, Insung Kang
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Publication number: 20100329395Abstract: An apparatus and method for symbol decoding comprising selecting a degree of freedom (DOF) parameter for a noise vector; selecting a delta probability value; computing a cost function for a lattice point that is one of a discrete set of nominal codeword positions in a hypersphere; selecting a sphere decoding radius based on the DOF parameter, the delta probability value and the cost function; and decoding a symbol using the sphere decoding radius. And, the apparatus and method comprising setting pre-defined threshold probabilities; computing threshold radii based on the pre-defined threshold probabilities; setting an initial sphere radius square to the value of a first threshold radii; finding the Lattice point based on the initial sphere radius square; computing an updated sphere radius square as the minimum of either a cost function or a second threshold radii; and finding a next lattice point based on the updated sphere radius square.Type: ApplicationFiled: December 17, 2009Publication date: December 30, 2010Applicant: QUALCOMM INCORPORATEDInventors: Insung Kang, Byonghyo Shim
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Publication number: 20100278035Abstract: Systems and methods for multi-user detection in a multiple access system are provided. In one aspect, an apparatus is provided. The apparatus comprises a processing unit configured to process received chips into received symbols for a plurality of users and a computation unit configured to compute a multi-user matrix using a Hadamard matrix, wherein the multi-user matrix relates user symbols for the plurality of users to the received symbols. The apparatus further comprises a detection unit configured to detect the user symbols for the plurality of users using the received symbols and the computed multi-user matrix.Type: ApplicationFiled: May 4, 2009Publication date: November 4, 2010Applicant: QUAL COMM IncorporatedInventors: Wenjun Li, Yingqun Yu, Farrokh Abrishamkar, Divaydeep Sikri, Insung Kang
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Publication number: 20100172451Abstract: Provided is automatic gain control (AGC) in which a feedback filter has a parameter that is changed based on information regarding data-packet boundaries. In one representative embodiment, the bandwidth of the filter temporarily is increased, or the time constant of the AGC filter temporarily is decreased, within a vicinity of each actual or potential packet boundary.Type: ApplicationFiled: March 5, 2009Publication date: July 8, 2010Applicant: VIA TELECOM, INC.Inventors: Insung Kang, Tarun K. Tandon
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Publication number: 20100172443Abstract: Systems and methods of classifying and decoding wireless signals are disclosed. A receiver may receive wireless signals from multiple transmitters. The receiver may use sphere decoding to classify the wireless signals (e.g., determine the modulation scheme of the wireless signals) and decode the wireless signals (e.g., determine the symbol and/or symbols transmitted using the wireless signals).Type: ApplicationFiled: January 6, 2010Publication date: July 8, 2010Applicant: QUALCOMM IncorporatedInventors: Byonghyo Shim, Insung Kang
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Patent number: 7706453Abstract: Provided are systems, methods and techniques for predicting a communication channel parameter. In one representative embodiment, values of a communication channel parameter are estimated at a plurality of previous points in time, values are predicted for the communication channel parameter at a plurality of such previous points in time, using a plurality of the channel estimates, and then the channel estimates are updated using the predictions, with the latter prediction and estimation steps being repeated until a specified condition has been satisfied.Type: GrantFiled: September 20, 2006Date of Patent: April 27, 2010Assignee: VIA Telecom Co., Ltd.Inventors: Insung Kang, Yunho Lee
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Patent number: 7656975Abstract: A method and system is disclosed for providing an automatic gain control in signal processing. After receiving a stream of analog signals, a gain is adjusted on the received analog signals using a first set of gain compensation parameters. Then, the adjusted analog signals are converted to digital signals. A predetermined number of digital signals are collected from the converted digital signals within a predetermined time period. The collected digital signals are delayed from being transferred out for further demodulation processing for a predetermined delay time. At the same time, a second set of gain compensation parameters are estimated based on the collected digital signals. The estimated second set of gain compensation parameters are applied to the delayed digital signals.Type: GrantFiled: February 10, 2005Date of Patent: February 2, 2010Assignee: VIA Telecom Co., Ltd.Inventors: Tarun K. Tandon, Insung Kang