Mean Mutual Information Based Adaptive Modulation and Coding Mechanism for Cooperative Relaying in Wireless Systems

Abstract:

We propose a link adaptation algorithm for cooperative transmissions in an OFDMA-based wireless system. The link adaptation method selects the transmission type (cooperative or non-cooperative), the modulation orders and amount and type of redundancy required to ensure a target block error rate at each phase of the cooperative transmission. The above parameter-values are chosen so as to minimize the number of occupied time-frequency radio resources required to transmit the K-bit log data block. The algorithm employs a BLER performance prediction method based on mutual information. The proposed link adaptation algorithm has linear complexity, but still provides a very good performance, as shown by simulation results.

• Periodical: Advanced Engineering Forum (Volumes 8-9)
• Pages: 593-602
• DOI: https://doi.org/10.4028/www.scientific.net/AEF.8-9.593
• Online since: June 2013
• Authors: Mihaly Varga, Mihai Alin Badiu, Vasile Bota
• Keywords: Cooperative Wireless Networks, Cross Layer Design, Link Adaptation

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