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公开(公告)号：US09973259B2
公开(公告)日：2018-05-15
申请号：US15620154
申请日：2017-06-12
Inventor： Kap-Seok Chang , Woo-Yong Lee , Kyeongpyo Kim , Hyoung-Jin Kwon , Hyun-Kyu Chung
CPC classification number: H04B7/15592 , H04B7/026 , H04B7/0417 , H04B7/0617 , H04B7/086 , H04B7/15521 , H04L1/0077 , H04L1/0618 , H04L2001/0097
Abstract: A data transmission method of a source node in a cooperative communication system includes: performing a beamforming to a relay node; transmitting data to the relay node; performing a beamforming to a destination node; and transmitting data to the destination node.
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公开(公告)号：USRE49158E1
公开(公告)日：2022-08-02
申请号：US15192228
申请日：2016-06-24
Inventor： Hee-Soo Lee , Bang-Won Seo , Hyun-Kyu Chung
Abstract: The present invention relates a method and apparatus for transmitting/receiving data using multiple codewords in a communication system using SC-FDMA (single carrier frequency division multiple access). A transmitter generates the multiple codewords for user data and transmits the generated multiple codewords. A receiver receives the multiple codewords and sequentially performs decoding and SIC (successive interference cancellation) on the received multiple codewords. Therefore, this structure can minimize a PAPR (peak to average power ratio) and considerably reduces interference between symbols in a frequency selective fading environment.
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公开(公告)号：US10863480B2
公开(公告)日：2020-12-08
申请号：US15910879
申请日：2018-03-02
Inventor： Il-Gu Lee , Sok-Kyu Lee , Hyun-Kyu Chung , Dae-Sik Kim
Abstract: A method and apparatus of accessing a channel in a wireless local area network is provided. A destination station receives a request to send (RTS) frame to allocate a network allocation vector from a source station over a first bandwidth and transmits a clear to send (CTS) frame over a second bandwidth to the source station in response to the RTS frame. The second bandwidth is dynamically determined when a first parameter has a predetermined value.
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公开(公告)号：US09432940B2
公开(公告)日：2016-08-30
申请号：US13779475
申请日：2013-02-27
Inventor： Il-Gu Lee , Sok-Kyu Lee , Hyun-Kyu Chung , Dae-Sik Kim
CPC classification number: H04W52/262 , H04B7/0626 , H04L1/1671 , H04W52/0216 , H04W52/0219 , H04W52/0229 , Y02D70/00 , Y02D70/142 , Y02D70/26
Abstract: A method and apparatus of accessing a channel in a wireless local area network is provided. A destination station receives a request to send (RTS) frame to allocate a network allocation vector from a source station over a first bandwidth and transmits a clear to send (CTS) frame over a second bandwidth to the source station in response to the RTS frame. The second bandwidth is dynamically determined when a first parameter has a predetermined value.
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公开(公告)号：US20240251411A1
公开(公告)日：2024-07-25
申请号：US18628040
申请日：2024-04-05
Inventor： Il-Gu Lee , Sok-Kyu Lee , Hyun-Kyu Chung , Dae-Sik Kim
CPC classification number: H04W72/20 , H04L5/0094 , H04L47/70 , H04W74/002 , H04L1/0002 , H04L1/0006 , H04W24/02
Abstract: A method and apparatus of accessing a channel in a wireless local area network is provided. A destination station receives a request to send (RTS) frame to allocate a network allocation vector from a source station over a first bandwidth and transmits a clear to send (CTS) frame over a second bandwidth to the source station in response to the RTS frame. The second bandwidth is dynamically determined when a first parameter has a predetermined value.
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Patent Agency Ranking
公开(公告)号：US12040878B2
公开(公告)日：2024-07-16
申请号：US17345723
申请日：2021-06-11
Inventor： Kap-Seok Chang , Woo-Yong Lee , Kyeongpyo Kim , Hyoung-Jin Kwon , Hyun-Kyu Chung
CPC classification number: H04B7/15592 , H04B7/026 , H04B7/0417 , H04B7/0617 , H04B7/086 , H04B7/15521 , H04L1/0077 , H04L1/0618 , H04L2001/0097
Abstract: A data transmission method of a source node in a cooperative communication system includes: performing a beamforming to a relay node; transmitting data to the relay node; performing a beamforming to a destination node; and transmitting data to the destination node.
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公开(公告)号：US11038582B2
公开(公告)日：2021-06-15
申请号：US16881254
申请日：2020-05-22
Inventor： Kap-Seok Chang , Woo-Yong Lee , Kyeongpyo Kim , Hyoung-Jin Kwon , Hyun-Kyu Chung
Abstract: A data transmission method of a source node in a cooperative communication system includes: performing a beamforming to a relay node; transmitting data to the relay node; performing a beamforming to a destination node; and transmitting data to the destination node.
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公开(公告)号：US10972325B2
公开(公告)日：2021-04-06
申请号：US16685507
申请日：2019-11-15
Inventor： Kapseok Chang , Wooyong Lee , Hyun-Kyu Chung
Abstract: Disclosed is a technique related to a method and apparatus for generating a preamble and a data frame for wireless communication, and to a synchronization estimation method using the preamble. According to the technique, a method for generating a frame for wireless communication is disclosed, wherein the method comprises: a step of generating a modified sequence using a first base sequence for synchronization estimation; and a step of allocating the first base sequence and the modified sequence to the frequency domain of a first timeslot to generate a preamble. The modified sequence includes a complex conjugated sequence of the first base sequence or a sequence having a code different from that of the first base sequence.
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公开(公告)号：US20200084077A1
公开(公告)日：2020-03-12
申请号：US16685507
申请日：2019-11-15
Inventor： Kapseok Chang , Wooyong Lee , Hyun-Kyu Chung
Abstract: Disclosed is a technique related to a method and apparatus for generating a preamble and a data frame for wireless communication, and to a synchronization estimation method using the preamble. According to the technique, a method for generating a frame for wireless communication is disclosed, wherein the method comprises: a step of generating a modified sequence using a first base sequence for synchronization estimation; and a step of allocating the first base sequence and the modified sequence to the frequency domain of a first timeslot to generate a preamble. The modified sequence includes a complex conjugated sequence of the first base sequence or a sequence having a code different from that of the first base sequence.
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公开(公告)号：US20180159708A1
公开(公告)日：2018-06-07
申请号：US15871760
申请日：2018-01-15
Inventor： Kapseok Chang , Wooyong Lee , Hyun-Kyu Chung
CPC classification number: H04L27/261 , H04L27/2613 , H04L27/2692 , H04W56/0085 , H04W72/04 , H04W84/12
Abstract: Disclosed is a technique related to a method and apparatus for generating a preamble and a data frame for wireless communication, and to a synchronization estimation method using the preamble. According to the technique, a method for generating a frame for wireless communication is disclosed, wherein the method comprises: a step of generating a modified sequence using a first base sequence for synchronization estimation; and a step of allocating the first base sequence and the modified sequence to the frequency domain of a first timeslot to generate a preamble. The modified sequence includes a complex conjugated sequence of the first base sequence or a sequence having a code different from that of the first base sequence.
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