Adaptive Transmission in a MIMO-OFDM System in Nakagami-m Fading Channels

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• 作者：Vidhyacharan Bhaskar…
• 关键词：Multiple input multiple output orthogonal frequency division multiplexing ; Nakagami ; m fading channel ; Adaptive modulation ; Bit error rate ; Average spectrum efficiency ; Ergodic capacity
• 刊名：International Journal of Wireless Information Networks
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：22
• 期：3
• 页码：285-293
• 全文大小：2,548 KB
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• 作者单位：Vidhyacharan Bhaskar (1) (2)
  Kamireddy Narendra Reddy (3)
  
  1. Department of Electrical and Computer Engineering, San Francisco State University, 1600 Holloway Avenue, San Francisco, CA, 94132, USA
  2. Department of Electrical Engineering, Northwestern Polytechnic University, 47650 Westinghouse Dr., Fremont, CA, 94539, USA
  3. Department of Electronics and Communication Engineering, SRM University, Kattankulathur, Kancheepuram Dt., 603203, Tamilnadu, India
  
• 刊物类别：Engineering
• 刊物主题：Electronic and Computer Engineering
  
• 出版者：Springer Netherlands
• ISSN：1572-8129

文摘

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.