Journal of South China University of Technology (Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (5): 70-74,88.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Minimum-Power AM-MIMO Algorithm to Realize Unequal Error Protection

Zhang Yan-ling  Sun Xian-pu  Li Jian-dong    

  1. State Key Laboratory of Integrated Service Networks,Xidian University,Xi＇an 710071,Shaanxi,China
  • Received:2007-05-15 Revised:2007-10-23 Online:2008-05-25 Published:2008-05-25
  • Contact: 张艳玲（1976-），女，博士生，讲师，主要从事无线通信、移动通信方面的研究． E-mail:ylzhang@mail．xidian．edu．cn
  • About author:张艳玲（1976-），女，博士生，讲师，主要从事无线通信、移动通信方面的研究．
  • Supported by:

    国家杰出青年科学基金资助项目（60725105）;国家自然科学基金重大项目（60496316）;国家自然科学基金资助项目（60572146）;高等学校学科创新引智计划项目（B08038）

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Abstract:

In order to improve the transmission quality of multimedia data in wireless communication,this paper proposes an adaptive modulation algorithm to realize the unequal error protection（UEP） for the data transmission in multiple-input multiple-output（MIMO） system.As the power gains of sub-channels of the spatial correlation MIMO system are greatly different in narrowband flat fading environment,the sub-channels are divided into two groups to transmit high-and low-quality data,respectively.Moreover,according to the demands of transmission quality and rate of input data,the modulation order and transmission power of each sub-channel are adaptively adjusted to minimize the total transmission power.Simulated results indicate that the proposed algorithm can effectively control the bit error rate of data and realize the unequal error protection with a minimum transmission power.

Key words: multiple-input multiple-output system, adaptive modulation, unequal error protection, minimum transmission power