Abstract With the increase in free-space optical communication distance and link attenuation, photon-counting communication based on a single photon detector will be the development trend in the future. In this paper, we use a single-pixel single photon avalanche diode (SPAD) detector to study the bit error rate (BER) performance of photon counting communication. As the single-pixel SPAD cannot distinguish the number of photons in a single detection event, we theoretically derive the (BER) model of a pulse position modulation (PPM) communication system based on a single-pixel SPAD detector. Then, the binary asymmetric channel (BAC) model is adopted to modify the channel log-likelihood in Serially Concatenated Pulse Position Modulation (SCPPM) decoding. Research results show that, when the BER is 1 0 − 6 , the photon efficiency can reach 1.6 photon per bit (PPB) in the modified BAC scheme with 0.1 photon/slot noise intensity, which is 28.6% better than the photon efficiency of 2.24 PPB in the unmodified Poisson channel scheme.

中文翻译：

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基于非光子数分辨率探测器的光子计数通信系统性能分析优化与实验验证

摘要 随着自由空间光通信距离和链路衰减的增加，基于单光子探测器的光子计数通信将是未来的发展趋势。在本文中，我们使用单像素单光子雪崩二极管 (SPAD) 检测器来研究光子计数通信的误码率 (BER) 性能。由于单像素SPAD无法区分单个检测事件中的光子数量，我们从理论上推导出基于单像素SPAD检测器的脉冲位置调制（PPM）通信系统的（BER）模型。然后，采用二进制非对称信道（BAC）模型来修改串行级联脉冲位置调制（SCPPM）解码中的信道对数似然。研究结果表明，当BER为1 0 − 6 时，光子效率可达1。