caa a22 4500 606189963 CHVBK 20210128100853.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s10776-015-0280-1 doi (NATIONALLICENCE)springer-10.1007/s10776-015-0280-1 Adaptive Transmission in a MIMO-OFDM System in Nakagami- m Fading Channels [Elektronische Daten] [Vidhyacharan Bhaskar, Kamireddy Reddy] The goal of fourth generation (4G) mobile communications system is to seamlessly integrate a wide variety of communication services such as high speed data, video and multimedia traffic as well as voice signals. One of the promising approaches in 4G is the Adaptive Orthogonal Frequency Division Multiplexing (AOFDM) technique. In Multiple Input Multiple Output (MIMO)-OFDM, adaptive transmission scheme is employed according to channel fading conditions in OFDM to improve the performance. In this paper, adaptive modulation is only considered. To further enhance the system performance, convolutional coding can be employed to the OFDM system. The obtained results show that significant improvement in bit error rate and average spectrum efficiency can be achieved demonstrating the superiority of the adaptive modulation schemes compared to fixed transmission schemes. Springer Science+Business Media New York, 2015 Multiple input multiple output orthogonal frequency division multiplexing nationallicence Nakagami- m fading channel nationallicence Adaptive modulation nationallicence Bit error rate nationallicence Average spectrum efficiency nationallicence Ergodic capacity nationallicence Bhaskar Vidhyacharan Department of Electrical and Computer Engineering, San Francisco State University, 1600 Holloway Avenue, 94132, San Francisco, CA, USA aut Reddy Kamireddy Department of Electronics and Communication Engineering, SRM University, 603203, Kattankulathur, Kancheepuram Dt., Tamilnadu, India aut International Journal of Wireless Information Networks Springer US; http://www.springer-ny.com 22/3(2015-09-01), 285-293 1068-9605 22:3<285 2015 22 10776 https://doi.org/10.1007/s10776-015-0280-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10776-015-0280-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bhaskar Vidhyacharan Department of Electrical and Computer Engineering, San Francisco State University, 1600 Holloway Avenue, 94132, San Francisco, CA, USA aut NATIONALLICENCE 700 1- Reddy Kamireddy Department of Electronics and Communication Engineering, SRM University, 603203, Kattankulathur, Kancheepuram Dt., Tamilnadu, India aut NATIONALLICENCE 773 0- International Journal of Wireless Information Networks Springer US; http://www.springer-ny.com 22/3(2015-09-01), 285-293 1068-9605 22:3<285 2015 22 10776