随着对光量子微观运动规律的深入认识，光子计数（Photon-Counting）已发展成为一种探测微弱激光信号的新型强有力方法。针对天基信息网和空间探测的国家重大战略需求，本项目以光子计数交织分多址（PhC-IDMA）通信系统设计为中心展开。首先，重点研究微弱激光泊松散弹噪声信道中迭代多用户干扰消除技术。光子计数散弹噪声独特的信号与噪声相关、非高斯泊松分布、非线性失真等特点对迭代检测提出了技术挑战，信息论相关内在新规律需要深化探索。其次，本项目将研究PhC-IDMA系统的迭代收敛性、香农容量以及光子信息效率等，重点突破非线性失真下迭代系统误码率理论分析难题。通过本项目研究，有助于发展泊松散弹噪声中迭代信号处理基础理论。研究成果可应用于编队卫星激光通信、高速多址卫星以及光量子信息学等方面，并为系统建设提供新技术和新方法。

With the in-depth understanding of the photon motion law, photon-counting has been developed into a new powerful way to detect ultra-weak laser signals. For national strategic needs in terms of space-based information networks and deep-space exploration, the project will study closely around the PhC-IDMA communication system design. Firstly, the iterative multiuser interference cancellation technology in the ultra-weak laser Poisson shot noise channels is proposed. The properties of photon-counting shot noise, such as, the dependence between signal and noise, non-Guassian Poisson distribution and the nonlinear feature bring challenges for iterative signal processing. The related inherent law of information theory needs further researches. Secondly, this project also studies the related iterative convergence, Shannon capacity and photonic information efficiency of PhC-IDMA systems. The difficulty of BER theoretical analysis of iteration system with nonlinear distortion is solved. With this study, iterative signal processing theory will be improved in Poisson shot-noise channels. The results can be applied to formation satellite optical communications, high-speed multiple-access satellite, optical quantum information science and provide new technology and method for system construction.