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Space-time trellis code's performance evaluation considering both feed forward and recursive structure across wireless channels

Author(s)
RAJKUMAR MYLSAMY Department of Information Technology, Sri Krishna College of Engineering and Technology, Coimbatore, Tamilnadu, India.
KARTHIKA JAYAPRAKASH Department of Electrical and Electronics Engineering, Sri Krishna College of Engineering and Technology, Coimbatore, Tamilnadu, India.
SURESHKUMAR ARUMUGAM Department of Information Technology, Sri Krishna College of Technology, Coimbatore, Tamilnadu, India.
Abstract
The emerging new technologies demands for reliable communication of data at high data rates making wireless communication a challenging field. The major limitations in wireless communications are power, bandwidth and fading. Especially in the applications such as video broadcasting and image transmission requires high data rate and bandwidth. In such applications Space Time Trellis Code Modulation (STTCM) is used to improve the data rate, power efficiency, coding gain and diversity gain by maximizing spatial diversity. The available Space Time Trellis code Modulation technique uses MPSK STTC with different states and non-iterative decoder .In this paper, we iteratively decode MPSK STTCM with various states and with various number of receiving antennas. And the performance of non-iterative decoder and iterative decoder is analyzed individually and together. Based on the analysis some conclusion is obtained. The non-iterative decoder (STTCM) uses feed forward encoder structure and Viterbi algorithm. The iterative decoder (ST Turbo TCM) uses recursive encoder structure and LogLikelihood value. The BER performance of iterative decoder and non-iterative decoder with 4-PSK and 8 PSK modulation is analyzed with various numbers of states and with variety of antennas which receives it. Outcomes of the simulation shows that the performance of the BER can be enhanced by raising the number of receiving antennas and raising the number of states. And the results also shows that the BER performance of Space Time Turbo Trellis codes are better than Space Time Trellis Codes.
Publication Details
Page(s) 5640-5649
DOI DOI not available
Published Journal: Journal of Theoretical and Applied Information Technology, Volume: 100, Issue: 17, Year: 2022

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Keywords
Space Time Trellis Code, Feed Forward Structure, Space Time Turbo Trellis Code, BER Performance, Recursive Structure
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