Transceiver hardware impairment (THI) is inevitable for high-date rate terahertz (THz) communication. Existing statistical analysis either neglects THI's effect or provides approximate results when analyzing the performance of the THz system combined with channel fading and antenna misalignment. In this paper, we develop exact analytical expressions for the average signal-to-noise ratio (SNR), ergodic capacity, and average bit-error-rate (BER) performance of a THz wireless link under the combined effect of $\alpha$-$\mu$ fading channel, zero-boresight pointing errors, and the Gaussian distributed THI. We also derive asymptotic expressions for the outage probability and average BER, which shows that the diversity order of the THz link is independent of THI's parameters. Simulations validate the derived analytical results and demonstrate the impact of the THI parameters on the THz performance.

翻译：收发器硬件损伤(THI)对高速率太赫兹(THz)通信是不可避免的。现有统计分析要么忽略了THI的影响，要么在结合信道衰落和天线指向误差分析太赫兹系统性能时提供近似结果。本文针对$\alpha$-$\mu$衰落信道、零瞄准线偏差指向误差和高斯分布THI的联合影响，推导了太赫兹无线链路的平均信噪比(SNR)、遍历容量和平均误码率(BER)性能的精确解析表达式。我们还推导了中断概率和平均BER的渐近表达式，表明太赫兹链路的分集阶数与THI参数无关。仿真验证了所推导的解析结果，并展示了THI参数对太赫兹性能的影响。