Joonbeom Kim

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After coarse synchronization in orthogonal frequency division multiplexing (OFDM) systems, there might still be a residual frequency offset (RFO) and a sampling clock frequency offset (SFO), which seriously degrade the performance of the systems. This paper proposes a simple way of jointly estimating the RFO and SFO by using a continual pilot (CP) defined(More)
Ahtrrrct-This p a p e r presents a max imum n posteriori (MAP) joint channel es t imator a n d de tec tor for convolutionally coded OFDM systems over mobile rad io communicat ion channels, which is suitable for t u r b o principles. To the purpose of the synchronization, the several p a p e r s where a known pilot-tone symbol ( 1 I , (21 is t ransmi t ted(More)
Channel state information (CSI) at the base station (BS) is critical to resource allocation design for wireless networks, but it is hard to obtain accurate CSI in a high mobility vehicular environment. In this paper, we study the spectrum and power allocation problem in device-to-device (D2D)-enabled vehicular networks, where CSI of vehicular links is only(More)
To My parents and family for their patience and support for all these years. iii ACKNOWLEDGEMENTS This thesis is by far the most significant accomplishment in my life, and it would be impossible without people who supported me and believed in me. Most of all I would like to express my sincere gratitude to my advisor, Professor Gordon L. Stüber, for his(More)
An iterative pilot-symbol aided modulation (PSAM) channel estimation approach is proposed for vertical Bell Laboratories layered space-time (V-BLAST) orthogonal frequency division multiplexing systems operating on frequency-selective fading channels. Since the signals at the receive antennas are the superposition of signals from multiple transmit antennas,(More)
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