针对相关Nakagami衰落等增益合并(equal gain combining,EGC)分集系统性能不存在精确解析式的问题,提出一种基于矩匹配的高效近似分析方法.该方法将各支路信号等增益叠加后的复杂衰落近似等价为α-μ分布,利用α-μ变量的统计特性获得...针对相关Nakagami衰落等增益合并(equal gain combining,EGC)分集系统性能不存在精确解析式的问题,提出一种基于矩匹配的高效近似分析方法.该方法将各支路信号等增益叠加后的复杂衰落近似等价为α-μ分布,利用α-μ变量的统计特性获得分集系统的信噪比分布、中断概率和平均误符号率等性能表达式.仿真结果表明,该方法实现简单,计算结果与理论值非常接近,可应用于多种信道衰落下EGC分集系统的参数设计和性能评估.展开更多
The differential chaotic shift keying （DCSK） communication in multiple input multiple output （MIMO） multipath fading chan- nels is considered. A simple MIMO-DCSK communication scheme based on orthogonal multi-cod...The differential chaotic shift keying （DCSK） communication in multiple input multiple output （MIMO） multipath fading chan- nels is considered. A simple MIMO-DCSK communication scheme based on orthogonal multi-codes （OMCs） and equal gain combination （EGC） is proposed, in which OMCs are used to spread the same information bit at each transmitting antenna and the infor- mation bit is detected by EGC at receiving antenna. The OMCs are constructed from one chaotic sequence by means of othogo- nal space-time block coding （OSTBC）. The output signal-to-noise ratio （SNR） after EGC is given based on central limit theory （CLT）, and it can effectively exploit the spatial diversity of the underlying MIMO system. Simulation results show that the full spatial diversity gain is achieved without channel estimation in the MIMO-DCSK communication scheme and it performs better than MC-EGC for a large number of transmitting antennas.展开更多
文摘针对相关Nakagami衰落等增益合并(equal gain combining,EGC)分集系统性能不存在精确解析式的问题,提出一种基于矩匹配的高效近似分析方法.该方法将各支路信号等增益叠加后的复杂衰落近似等价为α-μ分布,利用α-μ变量的统计特性获得分集系统的信噪比分布、中断概率和平均误符号率等性能表达式.仿真结果表明,该方法实现简单,计算结果与理论值非常接近,可应用于多种信道衰落下EGC分集系统的参数设计和性能评估.
基金supported by the National Natural Science Foundation of China(61101097)
文摘The differential chaotic shift keying （DCSK） communication in multiple input multiple output （MIMO） multipath fading chan- nels is considered. A simple MIMO-DCSK communication scheme based on orthogonal multi-codes （OMCs） and equal gain combination （EGC） is proposed, in which OMCs are used to spread the same information bit at each transmitting antenna and the infor- mation bit is detected by EGC at receiving antenna. The OMCs are constructed from one chaotic sequence by means of othogo- nal space-time block coding （OSTBC）. The output signal-to-noise ratio （SNR） after EGC is given based on central limit theory （CLT）, and it can effectively exploit the spatial diversity of the underlying MIMO system. Simulation results show that the full spatial diversity gain is achieved without channel estimation in the MIMO-DCSK communication scheme and it performs better than MC-EGC for a large number of transmitting antennas.
