由大气湍流引起的闪烁效应是影响太赫兹无线通信系统性能的重要因素，为此提出了使用空间分集技术来改善受强大气湍流和噪声影响的太赫兹光子计数无线通信系统性能的方案，并分别推导了在开关键控(OOK)调制下基于Laguerre 模型采用发射分集、接收分集以及多输入多输出技术(MIMO)的系统在强大气湍流下的误码率表达式。数值分析结果表明，在自由空间使用分集技术可以有效对抗强大气湍流，降低通信系统的误码率，是一种在不利天气条件下提升太赫兹无线通信性能的简单而有效的方法。

Scintillation induced by atmospheric turbulence is an important factor affecting the performance of terahertz wireless communication system. A space diversity scheme is proposed to improve the performance of terahertz photon-counting wireless communication system which is influenced by strong atmospheric turbulence and noise. The Bit Error Rate(BER) expression of transmit diversity system, receive diversity system and Multiple-Input Multiple-Output(MIMO) system in strong turbulence channel are respectively derived. The numerical simulation results show that spatial diversity techniques which can be used to antagonize strong atmospheric turbulence effectively and reduce the BER of the communication system, is a simple and effective approach to improve terahertz wireless communication under adverse weather conditions.