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公开(公告)号：US11876737B2
公开(公告)日：2024-01-16
申请号：US17214482
申请日：2021-03-26
Inventor： Jae-Hyun Seo , Sung-Ik Park , Seok-Ki Ahn , Jae-Young Lee
IPC: H04L5/00 , H04L27/26 , H04W72/0453 , H04W72/0446 , H04L1/00
CPC classification number: H04L5/0007 , H04L1/0071 , H04L27/2666 , H04W72/0446 , H04W72/0453
Abstract: Disclosed herein are a transmission apparatus, a reception apparatus and a transmission/reception method for an OFDM-based broadcasting system. The transmission apparatus includes multiple transmission frame generation units for generating multiple transmission frames from transmission data, an extended frame combination unit for generating an extended frame by combining the multiple transmission frames so that the multiple transmission frames are adjacent to each other based on a frequency, an extended OFDM modulation unit for modulating the extended frame and then generating a modulated signal, and a frequency up-conversion unit for performing frequency up-conversion on the modulated signal and generating a transmission signal, wherein each of the transmission frame generation units includes a data input unit for receiving transmission data, a channel-encoding unit for encoding the received transmission data and generating encoded data, and a framing and interleaving unit for framing and interleaving the encoded data and generating a transmission frame.
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公开(公告)号：US10404351B2
公开(公告)日：2019-09-03
申请号：US15447579
申请日：2017-03-02
Inventor： Jae-Hyun Seo , Young-Min Kim , Heung-Mook Kim
Abstract: Disclosed herein are a Layered Division Multiplexing (LDM)-based broadcast relay apparatus and method. The LDM-based broadcast relay apparatus includes a first layer symbol generation unit for outputting a first layer broadcast signal based on a received Layered Division Multiplexed (LDM) broadcast signal, a data buffer unit for storing the received LDM broadcast signal for a delay time before the first layer broadcast signal is output, and a second layer symbol generation unit for outputting a second layer broadcast signal by eliminating the first layer broadcast signal from the stored broadcast signal.
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公开(公告)号：US11336401B2
公开(公告)日：2022-05-17
申请号：US16823322
申请日：2020-03-18
Inventor： Seok-Ki Ahn , Sung-Ik Park , Jae-Hyun Seo
Abstract: Disclosed herein are a method of retransmission for downlink transmission of a wireless communication system and an apparatus for the same. The method includes receiving multiple feedback signals corresponding to a transmission failure from multiple terminals corresponding to point-to-multipoint transmission, generating retransmission data in response to the multiple feedback signals, and transmitting the retransmission data to the multiple terminals.
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公开(公告)号：US10454536B2
公开(公告)日：2019-10-22
申请号：US15993023
申请日：2018-05-30
Inventor： Sung-Ik Park , Bo-Mi Lim , Sun-Hyoung Kwon , Heung-Mook Kim , Jae-Hyun Seo , Jae-Young Lee , Nam-Ho Hur , Hoi-Yoon Jung , David Gomez-Barquero , Eduardo Garro
IPC: H04L1/02 , H04B7/0413 , H04L25/02 , H04L1/00 , H04L1/06
Abstract: Disclosed herein are a method for transceiving a broadcast signal using a combination of multiple antenna schemes with layered division multiplexing and an apparatus for the method. A method for receiving a broadcast signal includes generating received signals based on signals that are received through multiple receiving antennas, estimating channels between the receiving antennas and transmitting antennas, restoring a core-layer signal corresponding to the received signals, and restoring an enhanced-layer signal based on a cancellation process, wherein the cancellation process corresponds to the core-layer signal and is separately performed for the individual receiving antennas.
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