欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
首先针对传统的自动调制编码（adaptive modulation coding，AMC）技术存在映射的调制编码方案等级与实际信道环境不匹配的问题，提出了一种基于ACK／NACK（acknowledge／negative acknowledgement）反馈的信道质量指示（channel quality indicator，CQI）微调技术，此方案能够使上报的CQI等级更好地适应当前环境，确保了传输的可靠性。在此基础上提出了一种基于AMC的多输入多输出模式自适应切换方案，该方案基于信噪比和速率进行自适应的模式切换，可以在不同的传输环境下达到最高系统容量。仿真结果表明，所提方案能够适应多种传输环境，可以显著提高系统容量。
英文摘要：
Firstly, aiming at the problem that the mapping modulation and coding scheme level of traditional adap- tive modulation coding （AMC） does not match actual channel conditions, an improved AMC scheme based on acknow- ledge/negative acknowledgement （ACK/NACK） is presented, which adjusts the modulation and coding scheme level by user equiment （UE） reporting channel quality indicator （CQI） and ACK/NACK. The AMC algorithm enables the CQI level better adapted to the current environment and ensures the transmission reliability. And then a multi-input multi-output （MIMO） mode switching algorithm is presented, which selects the optimum MIMO mode according to proper signal to noise ratio and UE move speed. This algorithm can reach the maximum sys tem capcity in different transmission environments. Simulation results show that the algorithm can improve sys- tem throughput notably.
同期刊论文项目
同项目期刊论文
Queue stability distributed spectrum access algorithm based on Markov model for cognitive radio netw
期刊信息
位置：