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

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 aver...

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Bibliographic Details
Published in:Future generation computer systems 2004-02, Vol.20 (2), p.189-196
Main Authors: Hwang, Intae, Jang, Taewon, Kang, Mingoo, No, Sangmin, Son, Jungyoung, Hong, Daesik, Kang, Changeon
Format: Article
Language:English
Subjects:
Adaptive Modulation and Coding
Modulation and Coding Scheme
Transmit Diversity
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Summary: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.
ISSN:0167-739X
1872-7115
DOI:10.1016/S0167-739X(03)00133-X