Patents by Inventor Hyuck Chan Kwon
Hyuck Chan Kwon 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).
-
Patent number: 9185713Abstract: Embodiments of the present invention may provide an apparatus and a method for transmitting and receiving a random access channel (RACH) in a single carrier-frequency division multiple access (SC-FDMA) system. A frequency domain RACH signal may be mapped to a localized sub-frequency band of an entire frequency band available to the SC-FDMA system. A guard band including at least one sub carrier may be allocated between the RACH signal band and other channel signal bands. A guard time may be allocated between the RACE signal and other channel signals in the time domain. The RACH signal may include a short message including information related to a mobile station. The RACE signal may be detected in a frequency based method, a time based method or a sliding matched filter based method. Receiver complexity can be decreased if the RACH signal includes a CAZAC code sequence for a preamble. In such a case, a receive delay may be simply calculated and then adjusted more accurately.Type: GrantFiled: May 15, 2013Date of Patent: November 10, 2015Assignee: Ericsson-LG Co., Ltd.Inventors: Sung Lark Kwon, Dong Joo Park, Hyuck Chan Kwon, Young Kwon Ryu, Hoo Young Jeong, Hong Jik Kim, Jung Seung Lee, Jae Won Jang, Byoung Seong Park, Hee Gul Park
-
Publication number: 20150003421Abstract: Embodiments of the present invention may provide an apparatus and a method for transmitting and receiving a random access channel (RACH) in a single carrier-frequency division multiple access (SC-FDMA) system. A frequency domain RACH signal may be mapped to a localized sub-frequency band of an entire frequency band available to the SC-FDMA system. A guard band including at least one sub carrier may be allocated between the RACH signal band and other channel signal bands. A guard time may be allocated between the RACE signal and other channel signals in the time domain. The RACH signal may include a short message including information related to a mobile station. The RACH signal may be detected in a frequency based method, a time based method or a sliding matched filter based method. Receiver complexity can be decreased if the RACH signal includes a CAZAC code sequence for a preamble. In such a case, a receive delay may be simply calculated and then adjusted more accurately.Type: ApplicationFiled: May 15, 2013Publication date: January 1, 2015Applicant: ERICSSON-LG CO., LTD.Inventors: Sung Lark KWON, Dong Joo PARK, Hyuck Chan KWON, Young Kwon RYU, Hoo Young JEONG, Hong Jik KIM, Jung Seung LEE, Jae Won JANG, Byoung Seong PARK, Hee Gul PARK
-
Publication number: 20130250922Abstract: Embodiments of the present invention may provide an apparatus and a method for transmitting and receiving a random access channel (RACH) in a single carrier-frequency division multiple access (SC-FDMA) system. A frequency domain RACH signal may be mapped to a localized sub-frequency band of an entire frequency band available to the SC-FDMA system. A guard band including at least one sub carrier may be allocated between the RACH signal band and other channel signal bands. A guard time may be allocated between the RACE signal and other channel signals in the time domain. The RACH signal may include a short message including information related to a mobile station. The RACH signal may be detected in a frequency based method, a time based method or a sliding matched filter based method. Receiver complexity can be decreased if the RACH signal includes a CAZAC code sequence for a preamble. In such a case, a receive delay may be simply calculated and then adjusted more accurately.Type: ApplicationFiled: May 15, 2013Publication date: September 26, 2013Inventors: Sung Lark KWON, Dong Joo PARK, Hyuck Chan KWON, Young Kwon RYU, Hoo Young JEONG, Hong Jik KIM, Jung Seung LEE, Jae Won JANG, Byoung Seong PARK, Hee Gul PARK
-
Publication number: 20130250921Abstract: Embodiments of the present invention may provide an apparatus and a method for transmitting and receiving a random access channel (RACH) in a single carrier-frequency division multiple access (SC-FDMA) system. A frequency domain RACH signal may be mapped to a localized sub-frequency band of an entire frequency band available to the SC-FDMA system. A guard band including at least one sub carrier may be allocated between the RACH signal band and other channel signal bands. A guard time may be allocated between the RACE signal and other channel signals in the time domain. The RACH signal may include a short message including information related to a mobile station. The RACE signal may be detected in a frequency based method, a time based method or a sliding matched filter based method. Receiver complexity can be decreased if the RACH signal includes a CAZAC code sequence for a preamble. In such a case, a receive delay may be simply calculated and then adjusted more accurately.Type: ApplicationFiled: May 15, 2013Publication date: September 26, 2013Inventors: Sung Lark KWON, Dong Joo Park, Hyuck Chan Kwon, Young Kwon Ryu, Hoo Young Jeong, Hong Jik Kim, Jung Seong Lee, Jae Won Jang, Byoung Seong Park, Hee Gul Park
-
Patent number: 8457076Abstract: Embodiments of the present invention may provide an apparatus and a method for transmitting and receiving a random access channel (RACH) in a single carrier-frequency division multiple access (SC-FDMA) system. A frequency domain RACH signal may be mapped to a localized sub-frequency band of an entire frequency band available to the SC-FDMA system. A guard band including at least one sub carrier may be allocated between the RACH signal band and other channel signal bands. A guard time may be allocated between the RACH signal and other channel signals in the time domain. The RACH signal may include a short message including information related to a mobile station. The RACH signal may be detected in a frequency based method, a time based method or a sliding matched filter based method. Receiver complexity can be decreased if the RACH signal includes a CAZAC code sequence for a preamble. In such a case, a receive delay may be simply calculated and then adjusted more accurately.Type: GrantFiled: January 17, 2007Date of Patent: June 4, 2013Assignee: LG-Ericsson Co., Ltd.Inventors: Sung Lark Kwon, Dong Joo Park, Hyuck Chan Kwon, Young Kwon Ryu, Hoo Young Jeong, Hong Jik Kim, Jung Seung Lee, Jae Won Jang, Byoung Seong Park, Hee Gul Park
-
Patent number: 8416867Abstract: An apparatus and a method for interference cancellation using a multi-user multiple input multiple output (MU-MIMO) scheme in a single carrier frequency division multiple access (SC-FDMA) system are disclosed. Received data of every terminal are classified into first received data and second received data. The first received data has lower reliability and the second received data has higher reliability than the first received data. The second received data is transmitted to an upper layer. Interference signals are formed with the second received data based on a channel estimation value. The interference signals are removed from the first received data, and the interference signal free first received data is transmitted to the upper layer.Type: GrantFiled: November 23, 2009Date of Patent: April 9, 2013Assignee: LG-Ericsson Co., Ltd.Inventors: Hyuck Chan Kwon, Hee Gul Park, Jung Seung Lee, Byoung Seong Park
-
Publication number: 20110122760Abstract: An apparatus and a method for interference cancellation using a multi-user multiple input multiple output (MU-MIMO) scheme in a single carrier frequency division multiple access (SC-FDMA) system are disclosed. Received data of every terminal are classified into first received data and second received data. The first received data has lower reliability and the second received data has higher reliability than the first received data. The second received data is transmitted to an upper layer. Interference signals are formed with the second received data based on a channel estimation value. The interference signals are removed from the first received data, and the interference signal free first received data is transmitted to the upper layer.Type: ApplicationFiled: November 23, 2009Publication date: May 26, 2011Inventors: Hyuck Chan KWON, Hee Gul Park, Jung Seung Lee, Byoung Seong Park
-
Publication number: 20100028310Abstract: The present invention relates to a composition for transplantation in a physiologically compatible buffer solution comprising, (a) a transplant-cell selected among an adipose stem cell, an adipocyte, adipose tissues (fat tissue) and a mixture thereof; and (b) a semi-solid substance derived from a living body or a biodegradable substance selected among a hyaluronic acid, collagen, elastin, thrombin, chondroitin sulfate, albumin and a mixture thereof.Type: ApplicationFiled: June 5, 2007Publication date: February 4, 2010Inventors: Byung Rok Do, Ji Hyang Kim, Sung Goo Kang, Chul Geun Kim, Hyuck Chan Kwon, Byeong Kyu Kim, Ai-Young Lee, Jea Kyung Sung
-
Patent number: 7653856Abstract: The present invention relates to a power controlling method in a mobile radio communication system using Automatic Repeat reQuest (ARQ) scheme, and more particularly to a power controlling method of response (ACK/NACK) signals for transmitting the ACK/NACK signals in different power based on the permissible probabilities of reception error that the system requires. When the ACK/NACK signals are transmitted and received in the automatic repeat request (ARQ) system, since the ACK/NACK signals can be transmitted in accordance with the transmission power satisfying an error rate required in each signal by differentiating the transmission power of the signal according to each ACK/NACK, the power consumption required in the transmission of the ACK/NACK signals can be reduced.Type: GrantFiled: October 12, 2006Date of Patent: January 26, 2010Assignee: LG Electronics Inc.Inventors: Joon Kui Ahn, Hyuck Chan Kwon
-
Publication number: 20070171889Abstract: Embodiments of the present invention may provide an apparatus and a method for transmitting and receiving a random access channel (RACH) in a single carrier-frequency division multiple access (SC-FDMA) system. A frequency domain RACH signal may be mapped to a localized sub-frequency band of an entire frequency band available to the SC-FDMA system. A guard band including at least one sub carrier may be allocated between the RACH signal band and other channel signal bands. A guard time may be allocated between the RACH signal and other channel signals in the time domain. The RACH signal may include a short message including information related to a mobile station. The RACH signal may be detected in a frequency based method, a time based method or a sliding matched filter based method. Receiver complexity can be decreased if the RACH signal includes a CAZAC code sequence for a preamble. In such a case, a receive delay may be simply calculated and then adjusted more accurately.Type: ApplicationFiled: January 17, 2007Publication date: July 26, 2007Inventors: Sung Lark Kwon, Dong Joo Park, Hyuck Chan Kwon, Young Kwon Ryu, Hoo Young Jeong, Hong Jik Kim, Jung Seung Lee, Jae Won Jang, Byoung Seong Park, Hee Gul Park
-
Patent number: 7143330Abstract: The present invention relates to a power controlling method in a mobile radio communication system using Automatic Repeat reQuest (ARQ) scheme, and more particularly to a power controlling method of response (ACK/NACK) signals for transmitting the ACK/NACK signals in different power based on the permissible probabilities of reception error that the system requires. When the ACK/NACK signals are transmitted and received in the automatic repeat request (ARQ) system, since the ACK/NACK signals can be transmitted in accordance with the transmission power satisfying an error rate required in each signal by differentiating the transmission power of the signal according to each ACK/NACK, the power consumption required in the transmission of the NACK signal can be reduced.Type: GrantFiled: January 2, 2003Date of Patent: November 28, 2006Assignee: LG Electronics Inc.Inventors: Joon Kui Ahn, Hyuck Chan Kwon
-
Patent number: 7047473Abstract: A method for controlling the transmission of data in a radio communications system transmits response signals from a receiver which includes information that reflects received signal quality, as well as information indicating whether an error has occurred in the data transmission. In one case, acknowledgment signals or negative acknowledgment signals may be regarded as no reply and not forwarded to a transmitter. In another case, the signals could be recognized as an acknowledgment or retransmission request by a receiver. Preferably, the signals transmitted from the receiver to the transmitter are composed of more than 2-bit multiplexed information. By transmitting response signals of this type, the transmission efficiency of packet data may be increased, and the automatic repeat request (ARQ) performance by the system may be greatly improved.Type: GrantFiled: May 13, 2002Date of Patent: May 16, 2006Assignee: LG Electronics Inc.Inventors: Seung Hoon Hwang, Hyuck Chan Kwon
-
Patent number: 6788733Abstract: A novel and improved method and apparatus in a communication system (100) provides for efficient processing of received signals. The method and apparatus includes converting an encoded and spectrum spread received signal to received samples, determining a first channel estimate based on a first set of pilot signal samples. The first set of pilot signal samples are included in the received samples. The received samples are passed through a correlation and decoding process in accordance with the first channel estimate to produce decoded received samples. The decoded received samples are re-encoded and re-spreaded to produce re-encoded and re-spread samples. The re-encoded and re-spread samples are modified based on the first channel estimate to produce channel modified re-encoded and re-spread samples. The received samples pass through an interference cancellation that uses the channel modified re-encoded and re-spread samples to produce a new set of received samples.Type: GrantFiled: November 9, 2000Date of Patent: September 7, 2004Assignee: Qualcomm, IncorporatedInventors: Keum-Chan Whang, Hyuck-Chan Kwon
-
Patent number: 6609008Abstract: A novel and improved method and apparatus for controlling signal power level in a communication system (100) is provided by determining first and second signal to interference ratios of a received signal, respectively before and after an interference cancellation, determining a difference between the first and second signal to interference ratios, and determining, based on the difference, a signal to interference threshold for controlling power level of a signal transmitted from a source of the received signal.Type: GrantFiled: November 9, 2000Date of Patent: August 19, 2003Assignee: Qualcomm IncoporatedInventors: Keum-Chan Whang, Hyuck-Chan Kwon
-
Publication number: 20030131299Abstract: The present invention relates to a power controlling method in a mobile radio communication system using Automatic Repeat reQuest (ARQ) scheme, and more particularly to a power controlling method of response (ACK/NACK) signals for transmitting the ACK/NACK signals in different power based on the permissible probabilities of reception error that the system requires. When the ACK/NACK signals are transmitted and received in the automatic repeat request (ARQ) system, since the ACK/NACK signals can be transmitted in accordance with the transmission power satisfying an error rate required in each signal by differentiating the transmission power of the signal according to each ACK/NACK, the power consumption required in the transmission of the NACK signal can be reduced.Type: ApplicationFiled: January 2, 2003Publication date: July 10, 2003Applicant: LG Electronics Inc.Inventors: Joon Kui Ahn, Hyuck Chan Kwon
-
Publication number: 20020168945Abstract: A method for controlling the transmission of data in a radio communications system transmits response signals from a receiver which includes information that reflects received signal quality, as well as information indicating whether an error has occurred in the data transmission. In one case, acknowledgment signals or negative acknowledgment signals may be regarded as no reply and not forwarded to a transmitter. In another case, the signals could be recognized as an acknowledgment or retransmission request by a receiver. Preferably, the signals transmitted from the receiver to the transmitter are composed of more than 2-bit multiplexed information. By transmitting response signals of this type, the transmission efficiency of packet data may be increased, and the automatic repeat request (ARQ) performance by the system may be greatly improved.Type: ApplicationFiled: May 13, 2002Publication date: November 14, 2002Applicant: LG Electronics Inc.Inventors: Seung Hoon Hwang, Hyuck Chan Kwon