Title :
Performance of orthogonal space-time-frequency block codes over highly frequency selective fading channel for 2×1 and 2×2 MIMO-OFDM systems
Author :
Falahati, Abolfazel ; Payami, Mostafa
Author_Institution :
Dept. of Electr. Eng., Univ. of Sci. & Technol., Tehran, Iran
Abstract :
A different and simple approach is proposed to compute the error rate performances of orthogonal Space-Time-Frequency block codes over frequency-selective with m-coefficient Rayleigh fading channel bearing 2×1 and 2×2 MIMO-OFDM systems. First, PDF of the instantaneous SNR at the receiver is derived and BER expression for BPSK and QPSK modulations is obtained. Then based on the Moment Generating Function (MGF) approach, exact expressions for SER of M-PSK and M-QAM modulations are attained. As theoretical and simulation results show, the orthogonal STFBC can achieve diversity order of LMTMR while quasi-orthogonal STFBC, for high SNRs does not achieve full space and multipath diversity gains available in the MIMO-OFDM channel.
Keywords :
MIMO communication; OFDM modulation; Rayleigh channels; diversity reception; error statistics; probability; quadrature amplitude modulation; quadrature phase shift keying; space-time block codes; BER expression; BPSK modulations; LMTMR; M-PSK modulations; M-QAM modulations; MGF approach; MIMO-OFDM channel; MIMO-OFDM systems; PDF; QPSK modulations; SER; diversity order; error rate performances; frequency-selective; instantaneous SNR; m-coefficient Rayleigh fading channel; moment generating function approach; multipath diversity gains; orthogonal space-time-frequency block codes; quasi-orthogonal STFBC; receiver; Bit error rate; Block codes; Fading; Modulation; OFDM; Receivers; Signal to noise ratio; MIMO-OFDM; frequency-selective channel; multipath diversity; space-time-frequency block code; spatial diversity;
Conference_Titel :
Electrical Engineering (ICEE), 2014 22nd Iranian Conference on
Conference_Location :
Tehran
DOI :
10.1109/IranianCEE.2014.6999805
