naa a22 4500 510793738 CHVBK 20180411083328.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11277-012-0753-9 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0753-9 A Simple Space-Time-Frequency Block Code Scheme for Four Transmit Antennas [Elektronische Daten] [Wei Song, S. Balakannan, Moon Lee] It is well known that the full rate and full diversity complex space-time block code (STBC) is not existed for four transmit antennas. In this letter, we propose a simple quasi-orthogonal space-time-frequency block code (QO-STFBC) scheme with four transmit antennas and n R receive antennas, where every two transmit antennas constitute one group and each group transmits signals over different subcarriers. The receiver can separate the received signals from each group via odd/even index FFT operation. After recombining the separated received signals with received antennas, an equivalent half rate orthogonal STFBC (O-STFBC) can be used for decoding. Thus, the full rate and full diversity are achieved at the transmitter and receiver, respectively. Simulation result shows that the proposed QO-STFBC scheme has better performance than the other schemes, in rate 2 layered Alamouti scheme is about 4 dB, full rate QO-STBC scheme is about 5 dB and half rate O-STBC scheme is about 7 dB at 10−3 BER for the transmission of 2 bits/s/Hz. Springer Science+Business Media, LLC., 2012 Alamouti code nationallicence Quasi-orthogonal nationallicence Full diversity nationallicence Linear decoding nationallicence STFBC nationallicence Song Wei College of Information Technology, Eastern Liaoning University, 118003, Dandong, People's Republic of China aut Balakannan S. Kalasalingam Universiry, Krishnankoil, India aut Lee Moon Institute of Information and Communication, Chonbuk National University, 664-14 Deokjin-dong, 561-756, Jeonju, Republic of Korea aut Wireless Personal Communications Springer US; http://www.springer-ny.com 70/4(2013-06-01), 1363-1372 0929-6212 70:4<1363 2013 70 11277 https://doi.org/10.1007/s11277-012-0753-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0753-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Song Wei College of Information Technology, Eastern Liaoning University, 118003, Dandong, People's Republic of China aut NATIONALLICENCE 700 1- Balakannan S. Kalasalingam Universiry, Krishnankoil, India aut NATIONALLICENCE 700 1- Lee Moon Institute of Information and Communication, Chonbuk National University, 664-14 Deokjin-dong, 561-756, Jeonju, Republic of Korea aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 70/4(2013-06-01), 1363-1372 0929-6212 70:4<1363 2013 70 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer