Patents by Inventor Bok Tae Sim
Bok Tae Sim 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: 20210099967Abstract: Certain aspects of the present disclosure provide techniques for transceiver timing controls in a synchronized network. A method that may be performed by a user equipment (UE) or a base station (BS) includes determining a first instance of time corresponding to a beginning of a wireless transmission of data by a transceiver, determining a second instance of time corresponding to a beginning of a process configured to load a plurality of buffers with a portion of the data, loading of the plurality of buffers with the data, and transmitting, the data at the first instance of time.Type: ApplicationFiled: October 1, 2019Publication date: April 1, 2021Inventors: Hee Choul LEE, Anilkumar KANERIYA, Minkui LIU, Bok Tae SIM
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Patent number: 8731109Abstract: A method and apparatus for channel estimation in wireless communications are provided. After an initial channel estimation and an estimation of the effective channel length (ECL) are performed, a weighting based on the ECL may be applied in an effort to remove noise from the initial channel estimate and provide an estimated channel with increased accuracy. Different weightings may apply for different channel lengths. A threshold may be used during the ECL estimation, and the threshold may be predetermined or calculated in an effort to adapt to different channel environments.Type: GrantFiled: May 19, 2008Date of Patent: May 20, 2014Assignee: QUALCOMM IncorporatedInventors: Je Woo Kim, Bok Tae Sim, Ju Won Park, Tae Ryun Chang, Jong Hyeon Park
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Patent number: 8626096Abstract: A method for combining signals coming from multiple diversity sources may include performing maximal-ratio combining (MRC) based equalization and combining for receiver antenna diversity. The method may also include performing MRC-based equalization and combining for repetition diversity. The method may also include performing MRC-based equalization and combining for duplication diversity. The MRC-based equalization and combining for receiver antenna diversity, the MRC-based equalization and combining for repetition diversity, and the MRC-based equalization and combining for duplication diversity may each be performed separately.Type: GrantFiled: March 24, 2008Date of Patent: January 7, 2014Assignee: QUALCOMM IncorporatedInventors: Jong Hyeon Park, Bok Tae Sim, Je Woo Kim
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Patent number: 8548081Abstract: In accordance with a method for diversity combining in an orthogonal frequency division multiple access (OFDMA) system, repetition diversity equalization and combining may be performed with respect to received OFDMA signals. In addition, receiver antenna diversity equalization and combining may be performed with respect to the received OFDMA signals. The repetition diversity equalization and combining and the receiver antenna diversity equalization and combining may be performed in accordance with a maximum ratio combining (MRC) scheme.Type: GrantFiled: February 20, 2008Date of Patent: October 1, 2013Assignee: QUALCOMM IncorporatedInventors: Jong Hyeon Park, Bok Tae Sim, Je Woo Kim
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Patent number: 8537931Abstract: A synchronization and detection method in a wireless device may include performing coarse detection and synchronization with respect to a received signal. The synchronization and detection method may also include performing fine detection and synchronization for acquisition of the received signal. Results of the coarse detection and synchronization may be used for the fine detection and synchronization. The synchronization and detection method may also include performing tracking mode processing when the acquisition of the received signal has been achieved.Type: GrantFiled: January 4, 2008Date of Patent: September 17, 2013Assignee: QUALCOMM IncorporatedInventors: Jong Hyeon Park, Bok Tae Sim, Tae Ryun Chang, Je Woo Kim, Ju Won Park, Chae Kwan Lee, Sameer Nanavati
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Patent number: 8433002Abstract: Methods and apparatus for initially decoding a frame control header (FCH) in an orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) system in an effort to accurately determine the downlink frame prefix (DLFP) such that the remainder of an OFDM/A frame may be properly decoded are provided. Used, for example, when boosting factors applied in the transmitter to various elements of the OFDM/A frame and/or available pilots for the FCH are unknown, such methods may utilize a preamble channel estimate, the FCH pilots, or a combination thereof.Type: GrantFiled: September 28, 2011Date of Patent: April 30, 2013Assignee: QUALCOMM IncorporatedInventors: Jong Hyeon Park, Bok Tae Sim, Ju Won Park, Tae Ryun Chang
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Patent number: 8259866Abstract: A method and apparatus for decoding encoded data bits of a wireless communication transmission are provided. A set of a-priori bit values corresponding to known bit values of the encoded data bits may be generated. Decoding paths that correspond to decoded data bits that are inconsistent with the a-priori bit values may be removed from the possible decoding paths to consider, and decoding the encoded data bits by selecting a decoding path from remaining decoding paths of the possible decoding paths that were not removed.Type: GrantFiled: January 4, 2008Date of Patent: September 4, 2012Assignee: QUALCOMM IncorporatedInventors: Tae Ryun Chang, Jong Hyeon Park, Ju Won Park, Bok Tae Sim, Chun Woo Lee, Je Woo Kim
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Patent number: 8259867Abstract: Certain embodiments provide methods and apparatus for decoding a string of data bits, encoded with a turbo encoding scheme, in a wireless communication system. One or more a-priori bit values corresponding to expected bit values at one or more identified bit locations in the string of data bits may be identified. One or more branch metrics used in a turbo decoding scheme may be manipulated to effectively remove decoding paths, from a collection of possible decoding paths, based at least on the identified one or more a-priori bit values, resulting in one or more remaining decoding paths. The string of data bits may be decoded by selecting a decoding path from the one or more remaining decoding paths.Type: GrantFiled: July 18, 2008Date of Patent: September 4, 2012Assignee: QUALCOMM IncorporatedInventors: Qiang Huang, Bok Tae Sim, Jong Hyeon Park
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Patent number: 8194588Abstract: A method and apparatus for combining retransmitted hybrid automatic repeat-request (HARQ) messages divided into coding blocks in an orthogonal frequency-division multiplexing (OFDM)/orthogonal frequency-division multiple access (OFDMA) receiver are provided. According to such a coding-block-based HARQ combining scheme, the quality of each coding block may be compared to a threshold to determine whether the decoded bits or the HARQ combined signal should be saved for each coding block for subsequent HARQ iterations. In addition to reducing the required HARQ buffer size while preserving the combining gain, coding-block-based HARQ combining may also provide fast decoding and reduced power consumption when compared to conventional HARQ combining techniques.Type: GrantFiled: December 13, 2007Date of Patent: June 5, 2012Assignee: QUALCOMM IncorporatedInventors: Jong Hyeon Park, Bok Tae Sim, Je Woo Kim, Serguei A. Glazko, Sameer Nanavati, James Y. Hurt
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Patent number: 8161342Abstract: A method and apparatus for combining retransmitted hybrid automatic repeat-request (HARQ) messages at different stages in an OFDM/OFDMA receiver are provided. A combination of different types of HARQ combiners may be designed into the receiver and selected on a per-channel basis. Proper selection of a HARQ combining scheme may reduce the required HARQ buffer size and may provide an increased combining gain when compared to conventional HARQ combining techniques. Furthermore, the HARQ combiner type may be dynamically selected through forward and reverse shifting between the different types of HARQ combining schemes in an effort to decrease the bit error ratio (BER) without saturating the HARQ buffer.Type: GrantFiled: December 13, 2007Date of Patent: April 17, 2012Assignee: QUALCOMM IncorporatedInventors: Jong Hyeon Park, Bok Tae Sim, Je Woo Kim, Serguei A. Glazko, Sameer Nanavati, Ju Won Park
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Publication number: 20120014428Abstract: Methods and apparatus for initially decoding a frame control header (FCH) in an orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) system in an effort to accurately determine the downlink frame prefix (DLFP) such that the remainder of an OFDM/A frame may be properly decoded are provided. Used, for example, when boosting factors applied in the transmitter to various elements of the OFDM/A frame and/or available pilots for the FCH are unknown, such methods may utilize a preamble channel estimate, the FCH pilots, or a combination thereof.Type: ApplicationFiled: September 28, 2011Publication date: January 19, 2012Applicant: Qualcomm IncorporatedInventors: Jong Hyeon Park, Bok Tae Sim, Ju Won Park, Tae Ryun Chang
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Patent number: 8059759Abstract: Methods and apparatus for initially decoding a frame control header (FCH) in an orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) system in an effort to accurately determine the downlink frame prefix (DLFP) such that the remainder of an OFDM/A frame may be properly decoded are provided. Used, for example, when boosting factors applied in the transmitter to various elements of the OFDM/A frame and/or available pilots for the FCH are unknown, such methods may utilize a preamble channel estimate, the FCH pilots, or a combination thereof.Type: GrantFiled: May 19, 2008Date of Patent: November 15, 2011Assignee: QUALCOMM IncorporatedInventors: Jong Hyeon Park, Bok Tae Sim, Ju Won Park, Tae Ryun Chang
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Patent number: 8000411Abstract: A method and apparatus for decoding encoded data bits of a wireless communication transmission are provided. A set of a-priori bit values corresponding to known bit values of the encoded data bits may be generated. Decoding paths that correspond to decoded data bits that are inconsistent with the a-priori bit values may be removed from the possible decoding paths to consider, and decoding the encoded data bits by selecting a decoding path from remaining decoding paths of the possible decoding paths that were not removed. Multiple hypotheses, each corresponding to a different set of a-prior bit values may be evaluated, with the decoded data for a hypothesis selected based on the evaluation output for further processing.Type: GrantFiled: January 4, 2008Date of Patent: August 16, 2011Assignee: Qualcomm IncorporatedInventors: Jong Hyeon Park, Bok Tae Sim, Je Woo Kim, Serguei A. Glazko, Sameer Nanavati, Ju Won Park, Chun Woo Lee, Tae Ryun Chang
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Publication number: 20090285317Abstract: A method and apparatus for channel estimation in wireless communications are provided. After an initial channel estimation and an estimation of the effective channel length (ECL) are performed, a weighting based on the ECL may be applied in an effort to remove noise from the initial channel estimate and provide an estimated channel with increased accuracy. Different weightings may apply for different channel lengths. A threshold may be used during the ECL estimation, and the threshold may be predetermined or calculated in an effort to adapt to different channel environments.Type: ApplicationFiled: May 19, 2008Publication date: November 19, 2009Applicant: QUALCOMM IncorporatedInventors: Je Woo Kim, Bok Tae Sim, Ju Won Park, Tae Ryun Chang, Jong Hyeon Park
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Publication number: 20090285316Abstract: Methods and apparatus for initially decoding a frame control header (FCH) in an orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) system in an effort to accurately determine the downlink frame prefix (DLFP) such that the remainder of an OFDM/A frame may be properly decoded are provided. Used, for example, when boosting factors applied in the transmitter to various elements of the OFDM/A frame and/or available pilots for the FCH are unknown, such methods may utilize a preamble channel estimate, the FCH pilots, or a combination thereof.Type: ApplicationFiled: May 19, 2008Publication date: November 19, 2009Applicant: QUALCOMM IncorporatedInventors: Jong Hyeon Park, Bok Tae Sim, Ju Won Park, Tae Ryun Chang
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Publication number: 20090239494Abstract: A method for combining signals coming from multiple diversity sources may include performing maximal-ratio combining (MRC) based equalization and combining for receiver antenna diversity. The method may also include performing MRC-based equalization and combining for repetition diversity. The method may also include performing MRC-based equalization and combining for duplication diversity. The MRC-based equalization and combining for receiver antenna diversity, the MRC-based equalization and combining for repetition diversity, and the MRC-based equalization and combining for duplication diversity may each be performed separately.Type: ApplicationFiled: March 24, 2008Publication date: September 24, 2009Applicant: QUALCOMM INCORPORATEDInventors: Jong Hyeon Park, Bok Tae Sim, Je Woo Kim
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Publication number: 20090238063Abstract: In accordance with a method for diversity combining in an orthogonal frequency division multiple access (OFDMA) system, repetition diversity equalization and combining may be performed with respect to received OFDMA signals. In addition, receiver antenna diversity equalization and combining may be performed with respect to the received OFDMA signals. The repetition diversity equalization and combining and the receiver antenna diversity equalization and combining may be performed in accordance with a maximum ratio combining (MRC) scheme.Type: ApplicationFiled: February 20, 2008Publication date: September 24, 2009Applicant: QUALCOMM INCORPORATEDInventors: Jong Hyeon Park, Bok Tae Sim, Je Woo Kim
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Publication number: 20090213971Abstract: A method for midamble estimation comprises the steps of receiving a burst of symbols, selecting a subset of the burst of symbols that comprises a first midamble symbol, calculating, for each symbol in the subset, a corresponding midamble estimation error, and determining the lowest calculated midamble estimation error to locate the first midamble symbol. A receiver comprises an antenna configured to receive a burst of symbols, a timing estimator configured to select a subset of the burst of symbols that comprises a first midamble symbol, a midamble estimator configured to calculate, for each symbol in the subset, a corresponding midamble estimation error, and a processor configured to select the symbol in the subset corresponding to a lowest calculated midamble estimation error as the first midamble symbol.Type: ApplicationFiled: February 27, 2008Publication date: August 27, 2009Applicant: QUALCOMM INCORPORATEDInventors: Jong Hyeon Park, Bok Tae Sim, Je Woo Kim
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Publication number: 20090175389Abstract: Certain embodiments provide methods and apparatus for decoding a string of data bits, encoded with a turbo encoding scheme, in a wireless communication system. One or more a-priori bit values corresponding to expected bit values at one or more identified bit locations in the string of data bits may be identified. One or more branch metrics used in a turbo decoding scheme may be manipulated to effectively remove decoding paths, from a collection of possible decoding paths, based at least on the identified one or more a-priori bit values, resulting in one or more remaining decoding paths. The string of data bits may be decoded by selecting a decoding path from the one or more remaining decoding paths.Type: ApplicationFiled: July 18, 2008Publication date: July 9, 2009Applicant: QUALCOMM IncorporatedInventors: Qiang Huang, Bok Tae Sim, Jong Hyeon Park
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Publication number: 20090175394Abstract: A synchronization and detection method in a wireless device may include performing coarse detection and synchronization with respect to a received signal. The synchronization and detection method may also include performing fine detection and synchronization for acquisition of the received signal. Results of the coarse detection and synchronization may be used for the fine detection and synchronization. The synchronization and detection method may also include performing tracking mode processing when the acquisition of the received signal has been achieved.Type: ApplicationFiled: January 4, 2008Publication date: July 9, 2009Applicant: QUALCOMM INCORPORATEDInventors: Jong Hyeon Park, Bok Tae Sim, Tae Ryun Chang, Je Woo Kim, Ju Won Park, Chae Kwan Lee, Sameer Nanavati