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- 검색키워드
- 저자 : Haris Gacanin (검색결과 2 건)
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BER Performance of OFDM Combined with TDM Using Frequency-Domain Equalization
Gacanin, Haris,Takaoka, Shinsuke,Adachi, Fumiyuki The Korea Institute of Information and Commucation 2007 Journal of communications and networks Vol.9 No.1
Orthogonal frequency division multiplexing (OFDM) combined with time division multiplexing (TDM), in this paper called OFDM/TDM, can overcome the high peak-to-average-power ratio (PAPR) problem of the conventional OFDM and improve the robustness against long time delays. In this paper, the bit error rate (BER) performance of OFDM/FDM in a frequency-selective Rayleigh fading. channel is evaluated by computer simulation. It is shown that the use of frequency-domain equalization based on minimum mean square error criterion (MMSE-FDE) can significantly improve the BER performance, compared to the conventional OFDM, by exploiting the channel frequency-selectivity while reducing the PAPR or improving the robustness against long time delays. It is also shown that the performance of OFDM/FDM designed to reduce the PAPR can bridge the conventional OFDM and single-carrier (SC) transmission by changing the design parameter.
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Performance Evaluation of Multi-hop Relaying over Non-Gaussian PLC Channels
Khaled M. Rabie,Bamidele Adebisi,Haris Gacanin,Galymzhan Nauryzbayev University,Augustine Ikpehai 한국통신학회 2017 Journal of communications and networks Vol.19 No.5
Relaying over power line communication (PLC) channelscan considerably enhance the performance and reliability ofPLC systems. This paper is dedicated to study and analyze theenergy efficiency of multi-hop cooperative relaying PLC systems. Incremental decode-and-forward (IDF) relying is exploited to reducethe transmit power consumption. The PLC channel is assumedto experience log-normal fading with impulsive noise. Theperformances of single-hop and conventional DF relaying systemsare also analyzed in terms of outage probability and energy efficiencyfor which analytical expressions are derived. Results showthat using more relays can improve the outage probability performance;however, this is achieved at the expense of increased powerconsumption due to the increased static power of the relays, especiallywhen the total source-to-destination distance is relativelysmall. Results also demonstrate that the IDF PLC system has betterenergy efficiency performance compared to the other schemes.
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