TY - GEN
T1 - Achievable sum rate comparison of MIMO OFDMA and SC-FDMA systems with linear receivers
AU - Zhao, Longhai
AU - Sha, Xuejun
AU - Wu, Xuanli
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/7/1
Y1 - 2015/7/1
N2 - This paper compares the achievable sum rates of multiple-input multiple-output (MIMO) single carrier frequency division multiple access (SC-FDMA) and orthogonal frequency division multiple access (OFDMA) systems with linear receivers in spatially uncorrelated frequency selective Rayleigh fading channels. Zero forcing (ZF) and linear minimum mean-squared error (MMSE) receivers are considered. We derive closed form expressions for lower bounds on the achievable sum rates of SC- FDMA so as to compare them with the achievable sum rates of OFDMA. In addition, the comparison in the asymptotic regimes of high and low signal-to-noise ratios (SNRs) is also presented. It is analytically demonstrated that, for ZF and MMSE receivers, the achievable sum rate of SC-FDMA is approximately equal to that of OFDMA when the number of transmitter and receiver antennas grows with a fixed ratio of less than one, in both high and low SNR regimes. The results apply to scenarios with arbitrary numbers of subcarriers and arbitrary-length channels.
AB - This paper compares the achievable sum rates of multiple-input multiple-output (MIMO) single carrier frequency division multiple access (SC-FDMA) and orthogonal frequency division multiple access (OFDMA) systems with linear receivers in spatially uncorrelated frequency selective Rayleigh fading channels. Zero forcing (ZF) and linear minimum mean-squared error (MMSE) receivers are considered. We derive closed form expressions for lower bounds on the achievable sum rates of SC- FDMA so as to compare them with the achievable sum rates of OFDMA. In addition, the comparison in the asymptotic regimes of high and low signal-to-noise ratios (SNRs) is also presented. It is analytically demonstrated that, for ZF and MMSE receivers, the achievable sum rate of SC-FDMA is approximately equal to that of OFDMA when the number of transmitter and receiver antennas grows with a fixed ratio of less than one, in both high and low SNR regimes. The results apply to scenarios with arbitrary numbers of subcarriers and arbitrary-length channels.
UR - https://www.scopus.com/pages/publications/84940421852
U2 - 10.1109/VTCSpring.2015.7145665
DO - 10.1109/VTCSpring.2015.7145665
M3 - 会议稿件
AN - SCOPUS:84940421852
T3 - IEEE Vehicular Technology Conference
BT - 2015 IEEE 81st Vehicular Technology Conference, VTC Spring 2015 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 81st IEEE Vehicular Technology Conference, VTC Spring 2015
Y2 - 11 May 2015 through 14 May 2015
ER -