Ultra-high-speed, ultra-large-capacity and ultra-long-haul （3U） are the forever pursuit of optical communication. As a new mode of optical communication, 3U transmission can greatly promote next generation optical i...Ultra-high-speed, ultra-large-capacity and ultra-long-haul （3U） are the forever pursuit of optical communication. As a new mode of optical communication, 3U transmission can greatly promote next generation optical internet and broadband mobile communication network development and technological progress, therefore it has become the focus of international high-tech intellectual property competition ground. This paper introduces the scientific problems, key technologies and important achievements in 3U transmission research.展开更多
球形译码是多输入多输出(MIMO)系统中一种高效的检测算法。但对于非确定性MIMO系统,已有球形译码算法不能同时获得最优解和最低搜索树。针对该问题,提出了一种高效球形译码检测算法,通过增加常量对最大似然代价函数进行等价转化,使得球...球形译码是多输入多输出(MIMO)系统中一种高效的检测算法。但对于非确定性MIMO系统,已有球形译码算法不能同时获得最优解和最低搜索树。针对该问题,提出了一种高效球形译码检测算法,通过增加常量对最大似然代价函数进行等价转化,使得球形译码算法获得最优解的同时具有最低搜索树,大大降低了球形译码算法中的搜索复杂度。仿真结果表明,对于高阶正交幅度调制(M-QAM,M>4)方式,本文算法优于修正的CT(Modified Cui and Tellambura,MCT)算法,大大提高了球形译码中的搜索效率。此外,仿真结果给出了最小复杂度下的最优参数值。展开更多
文摘Ultra-high-speed, ultra-large-capacity and ultra-long-haul （3U） are the forever pursuit of optical communication. As a new mode of optical communication, 3U transmission can greatly promote next generation optical internet and broadband mobile communication network development and technological progress, therefore it has become the focus of international high-tech intellectual property competition ground. This paper introduces the scientific problems, key technologies and important achievements in 3U transmission research.
文摘球形译码是多输入多输出(MIMO)系统中一种高效的检测算法。但对于非确定性MIMO系统,已有球形译码算法不能同时获得最优解和最低搜索树。针对该问题,提出了一种高效球形译码检测算法,通过增加常量对最大似然代价函数进行等价转化,使得球形译码算法获得最优解的同时具有最低搜索树,大大降低了球形译码算法中的搜索复杂度。仿真结果表明,对于高阶正交幅度调制(M-QAM,M>4)方式,本文算法优于修正的CT(Modified Cui and Tellambura,MCT)算法,大大提高了球形译码中的搜索效率。此外,仿真结果给出了最小复杂度下的最优参数值。
