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公开(公告)号：US10700895B2
公开(公告)日：2020-06-30
申请号：US15864733
申请日：2018-01-08
Inventor： Jae Hwui Bae , Jin Hyuk Song , Je Won Lee , Joon Young Jung , Dong Joon Choi , Nam Ho Hur
Abstract: Disclosed are a roll-off period detection method, a symbol starting point detection method, a fractional frequency offset estimating method, and an OFDM downstream system using the same. A method of detecting a roll-off period in an OFDM downstream system according to an embodiment of the present disclosure may include: generating a temporary roll-off period by applying a windowing function to a signal having a preset length; and detecting a roll-off period based on any one of a cross correlation and a sum of differences between a detection target signal included in a range of two OFDM symbol signals based on a detection starting point, and the temporary roll-off period.
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Patent Agency Ranking
2.发明授权公开(公告)号：US08982988B2
公开(公告)日：2015-03-17
申请号：US13866174
申请日：2013-04-19
Inventor： Jin Hyuk Song , Jong Soo Lim
CPC classification number: H04L27/2634 , H04L27/2614
Abstract: A method and apparatus for transmitting an orthogonal frequency division multiplexing (OFDM) signal including converting a distribution of a signal in which inverse Fourier transform is performed in an OFDM system and a method of receiving an OFDM signal including expanding a received signal are provided, and by changing a magnitude distribution of a signal that is output from an OFDM modulator to a bimodal Gaussian distribution, an influence of noise in a receiving terminal can be reduced, and by limiting a signal that is output from an OFDM modulator to an appropriate magnitude, a phase in the receiving terminal can be prevented being wrongly demodulated.
Abstract translation: 提供一种用于发送正交频分复用（OFDM）信号的方法和装置，包括在OFDM系统中进行逆傅立叶变换的信号的分布，以及接收包括扩展接收信号的OFDM信号的方法，以及 通过将从OFDM调制器输出的信号的幅度分布改变为双模高斯分布，可以减少接收终端中的噪声的影响，并且通过将从OFDM调制器输出的信号限制到适当的大小， 可以防止接收终端中的相位被错误地解调。
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3.发明授权公开(公告)号：US11329794B2
公开(公告)日：2022-05-10
申请号：US16727708
申请日：2019-12-26
Inventor： Myung Sun Baek , Jin Hyuk Song , Joon Young Jung , Heung Mook Kim , Yong Seong Cho
Abstract: Disclosed are a method and a device for transmitting and receiving a signal, the method including: identifying a downlink signal-only transmission section in which a first electronic device transmits a downlink signal to a second electronic device, and transmitting the signal in the downlink signal-only transmission section; detecting at least one symbol that has a power value relatively higher than a predetermined threshold value; estimating, on the basis of the detected at least one symbol, an interference channel in which a self-interference signal occurs; detecting the self-interference signal; and identifying an FDX transmission section in which an uplink signal is received from the second electronic device and the downlink signal is transmitted simultaneously, and processing transmission of the downlink signal and reception of the uplink signal in the FDX transmission section, wherein the reception of the uplink signal is processed by removing the self-interference signal occurring in the interference channel.
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公开(公告)号：US10892797B2
公开(公告)日：2021-01-12
申请号：US16737760
申请日：2020-01-08
Inventor： Myung-Sun Baek , Jin Hyuk Song , Joon Young Jung , Heung Mook Kim , Eun Hee Hyun
Abstract: An apparatus and a method for processing an uplink signal of cable broadcasting network including: modulating uplink data to be transmitted to a broadcasting station which is located at an end of the cable broadcasting network into a plurality of symbols; performing a correlation-coding on the plurality of symbols; and outputting an analog radio frequency (RF) signal corresponding to the plurality of correlation-coded symbols are provided.
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5.发明授权公开(公告)号：US10193687B2
公开(公告)日：2019-01-29
申请号：US15441799
申请日：2017-02-24
Inventor： Jae Hwui Bae , Sang Jung Ra , Jin Hyuk Song , Dong Joon Choi , Nam Ho Hur
Abstract: Disclosed are a method for acquiring synchronization in a cable network, and a physical (PHY) transmitter and PHY receiver. The method for acquiring synchronization in a cable network according to an embodiment includes receiving, by a PHY receiver, a signal from a PHY transmitter, and acquiring, by the PHY receiver, channel synchronization when a symbol in which a channel preamble exists is detected from the received signal and a position of a frequency in which a channel subcarrier exists is detected from the detected symbol by performing a cross correlation operation on the received signal and the channel preamble.
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公开(公告)号：US10110275B2
公开(公告)日：2018-10-23
申请号：US15656906
申请日：2017-07-21
Inventor： Jae Hwui Bae , Sang-Jung Ra , Jin Hyuk Song , Joon Young Jung , Dong Joon Choi , Namho Hur
Abstract: A method of estimating an integer frequency offset and compensating for the integer frequency offset by an estimated error is provided. A frequency offset estimation method may include receiving a reception signal including PLC data and a physical layer link channel (PLC) preamble, detecting first position information on a position of a subcarrier of the PLC preamble in a frequency axis from the reception signal through a cross-correlation between the PLC preamble and the reception signal, detecting second position information on the position of the subcarrier of the PLC preamble defined in a transmission end by restoring the PLC data, and calculating a frequency offset by comparing the first position information with the second position information.
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