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多用户MIMO下行链路自适应反馈分布式调度算法 被引量:2

Distributed scheduling algorithm for multiuser MIMO downlink with adaptive feedback
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摘要 针对多用户MIMO下行链路,提出一种通信方式与反馈开销动态变化的分布式调度算法。采用该方法,各移动用户根据信道状态选择与基站的通信方式,包括波束形成与空分复用,并向基站自适应反馈信道信息;基站根据反馈信息选择用户子集与之通信,并采用预编码方法消除共道干扰。该算法由基站和移动台联合完成用户调度,系统反馈开销由各用户的信道状态共同决定。与已有方法相比,该算法能够以合理的反馈开销获得更高的系统容量和更好的误码性能。 We propose a distributed scheduling algorithm for multiuser MIMO downlink with dynamic variation of transmission mode and feedback cost. With this algorithm each Mobile Station (MS) chooses transmission scheme, including beamforming and spatial multiplexing according to its channel state, then, feeds back the Channel State Information (CSI) to the Base Station (BS). Based on the received SCI, BS selects user subset to communicate with and implements precoding method to eliminate Co-Channel Interference (CCI). The user scheduling is carried out by MS and BS corporately. The cost of the system feedback depends on each MS's channel state. Compared with existing methods, the proposed algorithm can achieve higher system capacity and better Bit Error Rate (BER) performance with appropriate feedback load.
出处 《吉林大学学报(工学版)》 EI CAS CSCD 北大核心 2011年第2期514-519,共6页 Journal of Jilin University:Engineering and Technology Edition
基金 国家杰出青年科学基金项目(60725105) '973'国家重点基础研究发展规划项目(2009CB320404) 长江学者和创新团队发展计划(IRT0852) '863'国家高技术研究发展计划项目(2007AA01Z288) 国家自然科学基金项目(60902032) 高等学校引智计划项目(B08038) 教育部科学技术研究重点项目(107103) 科技部重大专项(2009ZX03007-004) 中央高校基本科研业务费专项基金项目(K50510010022)
关键词 通信技术 多用户 MIMO系统 下行链路 调度 预编码 反馈 communication multiuser MIMO system downlink scheduling precoding teedback
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参考文献14

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同被引文献26

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