TY - GEN
T1 - On performance of cooperative OFDM/TDM with frequency-domain equalization in a multipath wireless channel
AU - Ligata, Amir
AU - Gacanin, Haris
AU - Adachi, Fumiyuki
PY - 2011
Y1 - 2011
N2 - Cooperative transmission, where spatially distributed users form a multi-antenna system and assist in forwarding the information from source to destination node, achieves the diversity gain of a multiple-input multiple-output (MIMO) system. Cooperative network based on OFDM has been proposed to cope with the channel frequency-selectivity but due to high peak-to-average power ratio (PAPR) of OFDM, expensive power amplifier are required. In this paper, we present cooperative network based on OFDM combined with time division multiplexing (OFDM/TDM) using minimum mean square error frequency-domain equalization (MMSE-FDE) in a frequency-selective fading channel. We theoretically analyze the network performance with respect to the bit error rate (BER). The conditional signal-to-interference plus noise ratio (SINR) expressions are derived based on Gaussian approximation of the residual inter-slot interference (ISI) after MMSE-FDE for the given set of channel gains. The average BER performance for OFDM/TDM is evaluated by Monte-Carlo numerical computation method using the derived theoretical expressions and confirmed by computer simulation. The results show that the lower BER is achieved with cooperative OFDM/TDM in comparison with OFDM based cooperative network because OFDM/TDM exploits both cooperative and frequency diversity gains.
AB - Cooperative transmission, where spatially distributed users form a multi-antenna system and assist in forwarding the information from source to destination node, achieves the diversity gain of a multiple-input multiple-output (MIMO) system. Cooperative network based on OFDM has been proposed to cope with the channel frequency-selectivity but due to high peak-to-average power ratio (PAPR) of OFDM, expensive power amplifier are required. In this paper, we present cooperative network based on OFDM combined with time division multiplexing (OFDM/TDM) using minimum mean square error frequency-domain equalization (MMSE-FDE) in a frequency-selective fading channel. We theoretically analyze the network performance with respect to the bit error rate (BER). The conditional signal-to-interference plus noise ratio (SINR) expressions are derived based on Gaussian approximation of the residual inter-slot interference (ISI) after MMSE-FDE for the given set of channel gains. The average BER performance for OFDM/TDM is evaluated by Monte-Carlo numerical computation method using the derived theoretical expressions and confirmed by computer simulation. The results show that the lower BER is achieved with cooperative OFDM/TDM in comparison with OFDM based cooperative network because OFDM/TDM exploits both cooperative and frequency diversity gains.
KW - Cooperative networking
KW - MMSE-FDE
KW - OFDM/TDM
KW - theoretical analysis
UR - http://www.scopus.com/inward/record.url?scp=84857854836&partnerID=8YFLogxK
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U2 - 10.1109/APCC.2011.6152891
DO - 10.1109/APCC.2011.6152891
M3 - Conference contribution
AN - SCOPUS:84857854836
SN - 9781457703881
T3 - 17th Asia-Pacific Conference on Communications, APCC 2011
SP - 665
EP - 670
BT - 17th Asia Pacific Conference on Communications, APCC 2011
T2 - 17th Asia Pacific Conference on Communications, APCC 2011
Y2 - 2 October 2011 through 5 October 2011
ER -