Performance analysis of adaptive modulation and coding combined with transmit diversity in next generation mobile communication systems

  • Authors:

  • Intae Hwang;Taewon Jang;Mingoo Kang;Sangmin No;Jungyoung Son;Daesik Hong;Changeon Kang

  • Affiliations:

  • Yonsei University, Seoul, South Korea;Yonsei University, Seoul, South Korea;Hanshin University, Osan, South Korea;Yonsei University, Seoul, South Korea;KIST, Seoul, South Korea;Yonsei University, Seoul, South Korea;Yonsei University, Seoul, South Korea

  • Venue:
  • Future Generation Computer Systems - Special issue: Modeling and simulation in supercomputing and telecommunications
  • Year:
  • 2004

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Abstract

In this paper, we combine Adaptive Modulation and Coding (AMC) with Transmit Diversity (TD) to improve the performance of AMC in CDMA systems. An improved SNR increases a probability of selecting Modulation and Coding Scheme (MCS) level that supports higher data transfer rate. Therefore, higher average throughput can be achieved. As an open-loop TD, Space-Time block coding based Transmit antenna Diversity (STTD) is applied to AMC. For a closed-loop TD, Selection Transmit Diversity (STD) is combined with AMC. The results show that higher throughput is achieved by AMC-TD schemes. Compared to the conventional AMC, AMC-STTD scheme shows about 250 kbps increase in throughput. In addition, AMC-STD with two transmit antennas achieves about 420 kbps throughput improvement over the conventional AMC at 9 dB SNR in flat Rayleigh fading channel.