Precise Error Performance of BPSK Modulated Coherent Terahertz Wireless LOS Links with Pointing Errors  
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to Road Research Laboratory, School of Energy and Electrical Engineering, Chang'an University, 356 Changdaa Nan Lu, Xi'an 710018, China; [EMAIL_ADDRESS] (R.J.); [EMAIL_ADDRESS] (H.W. ); [EMAIL_ADDRESS] (H.L. ); 1  
[PERSON]  
1 Internet of Vehicle2  
to Road Research Laboratory, School of Energy and Electrical Engineering, Chang'an University, 356 Changdaa Nan Lu, Xi'an 710018, China; [EMAIL_ADDRESS] (R.J.); [EMAIL_ADDRESS] (H.W. ); [EMAIL_ADDRESS] (H.L. ); 1  
[PERSON]  
1 Internet of Vehicle2  
to Road Research Laboratory, School of Energy and Electrical Engineering, Chang'an University, 356 Changdaa Nan Lu, Xi'an 710018, China; [EMAIL_ADDRESS] (R.J.); [EMAIL_ADDRESS] (H.W. ); [EMAIL_ADDRESS] (H.L. ); 1  
[PERSON]  
1 Internet of Vehicle2  
to Road Research Laboratory, School of Energy and Electrical Engineering, Chang'an University, 356 Changdaa Nan Lu, Xi'an 710018, China; [EMAIL_ADDRESS] (R.J.); [EMAIL_ADDRESS] (H.W. ); [EMAIL_ADDRESS] (H  
efficient use of the available spectrum, further enhancing the energy efficiency of THz communication networks. THz wireless communication has developed rapidly since the 120 GHz frequency and 10 Gbps communication demonstration system was reported in 2006 [2]. With the advancement of THz communication technology, THz now features faster speeds, higher atmospheric window frequencies, lower power consumption, enhanced integration, and practical applications. Additionally, the data transmission rate of THz communication systems is steadily increasing. A 100 GHz band THz wireless communication system was proposed based on the transmission element surface [3]. The speed of THz communication systems was found to achieve up to 120 Gbps [4]. Using sub-band, airborne THz band communication speed reached 150 Gbps recently [5]. Ref. [6] explored subcarrier-modulated THz wireless systems, analyzing their performance under the log-normal (LN) and Gamma-Gamma (GG) models. It provided a detailed examination of how composite turbulence and pointing errors impact the system performance. However, these studies only considered non-coherent THz links. More recently, the research based on coherent THz technology is entering an active stage. Coherent THz technology involves the generation and transmission of THz waves using coherent light sources within the THz frequency band. Photoelectric technology was used to generate signals and coherent reception of wireless THz communication [7]. Larger grooves were incorporated into each cycle of the grating, enhancing the transmission grating's structure as demonstrated in [8], which significantly increased the power output of the coherent THz radiation source. In the development of a reliable THz generator, the light source is driven by a compact accelerator due to the high energy of its pulses and the frequency range between 0.1 THz and 60 THz [9]. Ref. [10] provided explicit expressions for the probability density functions (PDFs), cumulative distribution functions, and secrecy outage probability (SOP) of the end-to-end signal-to-noise ratio (SNR) using Meijer's G-function. The effectiveness of coherent THz detection using a photoconductive antenna was explored [11], achieving broadband detection capabilities up to 10 THz, thus spanning the entire THz band. Advancements in coherent THz wireless systems, enabled by silicon photonic integrated circuits, have achieved error-free transmission at 1 MHz-THz, with a bit error rate of \(10^{-6}\) or lower, and a data rate of 50 Gbps [12]. Comparative studies of two antenna designs, utilizing amplitude modulation and coherent data signals for a wireless link operating near 300 GHz, were detailed [13]. Moreover, the real-time digital coherent transmission of 34 GBd polarization division multiplexing quadrature phase shift keying signals was showcased [14].