Search Results - "Gi-Hong Im"

Amplitude clipping and iterative reconstruction of MIMO-OFDM signals with optimum equalization by KWON, Ui-Kun, KIM, Dongsik, IM, Gi-Hong

“…Multi-input multi-output orthogonal frequency division multiplexing (MIMO-OFDM) has become a promising candidate for next generation broadband wireless…”
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Performance of single carrier transmission with cooperative diversity over fast fading channels by SEOL, Dae-Young, KWON, Ui-Kun, IM, Gi-Hong

“…Space-time block coded (STBC) single carrier (SC) transmission was extended in a distributed fashion for practical implementation of user cooperation. However,…”
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On Achievable Rate of User Selection for MIMO Broadcast Channels With Limited Feedback by Min, Moonsik, Jeon, Yo-Seb, Im, Gi-Hong

“…We consider the block diagonalization (BD) and user selection based on limited feedback in multiple antenna broadcast channels. With limited feedback, due to…”
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Soft Combining for Cooperative Spectrum Sensing over Fast-Fading Channels by Choi, Wonseok, Song, Moon-Gun, Ahn, Jaeha, Im, Gi-Hong

“…We propose soft combining methods for cooperative spectrum sensing in cognitive radio networks over fast-fading channels. In fast-fading environment, it is…”
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Opportunistic Two-Stage Feedback and Scheduling for MIMO Downlink Systems by MIN, Moonsik, KIM, Dongsik, KIM, Hyun-Myung, IM, Gi-Hong

“…We propose an opportunistic two-stage feedback and scheduling algorithm that is based upon zero-forcing beamforming with semi-orthogonal user selection…”
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Pilot-Symbol Assisted Power Delay Profile Estimation for MIMO-OFDM Systems by KIM, Young-Jin, IM, Gi-Hong

“…This letter proposes a power delay profile (PDP) estimation technique for linear minimum mean square error (LMMSE) channel estimator of multiple-input…”
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Low-Complexity Detection Scheme for Cooperative MIMO Systems With Decode-and-Forward Relays by Im, Gi-Hong, Kim, Hyun-Myung, Kim, Tae-Kyoung, Min, Moonsik

“…In this paper, we study low-complexity detection schemes for cooperative multiple-input multiple-output (MIMO) systems with decode-and-forward (DF) relays. In…”
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Cyclic delay diversity with frequency domain turbo equalization for uplink fast fading channels by KWON, Ui-Kun, IM, Gi-Hong

“…Cyclic delay diversity (CDD) is an attractive diversity technique due to its low complexity and compatibility to existing wireless communication systems. This…”
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Joint Sensing Adaptation and Resource Allocation for Cognitive Radio with Imperfect Sensing by LIM, Hyoung-Jin, SEOL, Dae-Young, IM, Gi-Hong

“…In cognitive radio networks, imperfect spectrum sensing causes harmful interferences or low utilization of unused bands, depending on an access policy of the…”
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Time-Domain Differential Feedback for Massive MISO-OFDM Systems in Correlated Channels by Jeon, Yo-Seb, Kim, Hyun-Myung, Cho, Yong-Sang, Im, Gi-Hong

“…Massive multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) is a promising technology for next-generation wireless…”
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Iterative multiuser detection with spectral efficient relaying protocols for single-carrier transmission by YUNE, Tae-Won, LIM, Jong-Bu, IM, Gi-Hong

“…In this paper, we present an iterative multiuser detection scheme using frequency-domain equalization (IMDFDE), which can be incorporated into a single carrier…”
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Pilot Position Selection and Detection for Channel Estimation of SC-FDE by KIM, Dongsik, KWON, Ui-Kun, IM, Gi-Hong

“…In this letter, we propose a simple pilot position selection/detection technique for channel estimation of single- carrier frequency domain equalization…”
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Efficient Codebook Design for Co-Operative MIMO Systems With Decode-and-Forward Relay by Kim, Tae-Kyoung, Choi, Wonseok, Im, Gi-Hong

“…We present an efficient codebook for co-operative multiple-input multiple-output systems that use decode-and-forward relay. To achieve full diversity gain, the…”
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Opportunistic Network-Coded Cooperative Transmission with Demodulate-and-Forward Protocol in Wireless Channels by YUNE, Tae-Won, KIM, Dongsik, IM, Gi-Hong

“…In this letter, we consider a multiuser cooperative transmission scheme with network coding over wireless channels. Network coding based on decode-and-forward…”
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Cooperation-Based Dynamic Spectrum Leasing via Multi-Winner Auction of Multiple Bands by LIM, Hyoung-Jin, SONG, Moon-Gun, IM, Gi-Hong

“…In this paper, we study a cooperation-based dynamic spectrum leasing mechanism via multi-winner auction of multiple bands. Based on a second-price auction…”
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Feedback Optimization Schemes for Downlink MISO-OFDMA Systems With Heterogeneous Users by KIM, Hyun-Myung, MOONSIK MIN, IM, Gi-Hong

“…This paper proposes feedback optimization schemes for multiple-input single-output orthogonal frequency-division multiple access (MISO-OFDMA) systems with…”
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An Effective PAPR Reduction of SFBC-OFDM for Multinode Cooperative Transmission by Kim, Young-Jin, Kwon, Ui-Kun, Seol, Dae-Young, Im, Gi-Hong

“…Peak-to-average power ratio (PAPR) regrowth after clipping is one disadvantage of space-frequency block coded orthogonal frequency-division multiplexing…”
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Cyclic prefixed single carrier transmission with SFBC over mobile wireless channels by Jang, Jin-Ho, Won, Hui-Chul, Im, Gi-Hong

“…This letter proposes a space-frequency block-coded (SFBC) single-carrier frequency-domain equalization (SC-FDE) system. The transmit sequence of the proposed…”
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Improved Network-Coded Cooperative Transmission with Low-Complexity Adaptation to Wireless Channels by KIM, Dongsik, KIM, Hyun-Myung, IM, Gi-Hong

“…The relay employs network coding to transmit the packets from the source nodes simultaneously, for increasing spectral efficiency in wireless environments. The…”
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Improved Spectrum-Sharing Protocol for Cognitive Radio Networks With Multiuser Cooperation by Kim, Tae-Kyoung, Kim, Hyun-Myung, Song, Moon-Gun, Im, Gi-Hong

“…This paper proposes an improved spectrum-sharing protocol for multiuser cooperation in cognitive radio (CR) networks. In CR networks, a secondary user (SU) can…”
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