Threshold Controlling Scheme for Adaptive Modulation and Coding System

Daisuke TAKEDA  Yuk C CHOW  Paul STRAUCH  Hiroshi TSURUMI  

IEICE TRANSACTIONS on Communications   Vol.E89-B    No.5    pp.1598-1604
Publication Date: 2006/05/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.5.1598
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
adaptive modulation and coding,  SIR,  CRC,  transmission power control,  

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Adaptive modulation and coding scheme (AMC) is an effective way to achieve high data rate communication. In AMC system, the key issue is to determine the rule for switching among different Modulation and Coding Schemes (MCSs). In this paper, adaptive threshold controlling scheme for AMC is proposed. The proposed scheme controls switching thresholds according to target block error rate. Simulation results have shown that the throughput performance of the proposed scheme is very close to the performance, which obtained by the optimum SIR thresholds. We also proposed downlink transmission power control (TPC) scheme suitable for AMC. The throughput of the lowest MCS is improved and the tranmission power of the highest MCS can be reduced with the proposed algorithm.