大气湍流中基于光子计数的多入单出迭代检测  

A photon-counting MISO iterative detection scheme over atmospheric Poisson channel

作　　者：张鼎臣[1] 周小林[1] 杜建洪[1] 

机构地区：[1]复旦大学通信科学与工程系,上海200433

出　　处：《太赫兹科学与电子信息学报》2013年第1期85-90,共6页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家高科技研究与发展计划(863)资助项目(2011AA100701);国家自然科学基金资助项目(60802011);国家科技重大专项资助项目(2012ZX03001013-004)(2011ZX03003)(2010ZX03002)

摘　　要：大气湍流导致的光强闪烁,会造成自由空间光通信的信道衰落和传输突发错误。为了克服该影响,提出一种基于光子计数的多层交织多入单出(MISO)迭代检测方案。在受限散粒噪声Poisson信道模型下,推导了迭代检测算法。针对重复码和级联卷积码,分别进行了数值仿真并分析了系统性能。结果表明,该算法能以较低的计算复杂度,获得理想的误码率(BER),并易于硬件实现。To overcome the channel fading and burst error in Free-Space Optical（FSO） transmission due to atmospheric turbulence-induced scintillation, a photon-counting based multi-layer interleaved Multiple- Input Single-Output（MISO） iterative detection scheme is proposed. Under the assumption of shot noise limited Poisson channels, an iterative detection algorithm is derived. The system simulations with Repetition Code（RC） and concatenated code in conjunction with the analysis of system performance are ilhlstrated. The numerical results show that the scheme can provide an excellent Bit Error Rate（BER） performance with a relatively low complexity and is easy for hardware to realize.

关 键 词：多入单出 迭代检测 收敛性 光子计数 交织多址 后验概率译码 

分 类 号：TN929.1[电子电信—通信与信息系统]