Inter-satellite optical wireless communication (IsOWC) links have been exploited by many researchers as a viable technology to transmit information amongst two or more satellites using optical carrier signals and outer space as the medium of propagation medium. IsOWC links can securely transmit information all over the globe. The present study discusses a spectral-efficient large-speed single-channel IsOWC system using polarization division multiplexed-quadrature phase shift keying (PDM-QPSK) scheme. Coherent detection has been used at the receiver terminal for receiver sensitivity improvement. A digital signal processing (DSP) module to mitigate losses due to nonlinearity effects and for estimating carrier phase has been used at the receiver. We have analyzed the proposed link performance by investigating the required optical signal to noise ratio (OSNR) to achieve a target bit error rate (BER). The reported results show a faithful 160 Gbit/s transmission at 40,000 km with good BER. Also, we numerically investigate the OSNR performance of link for increasing pointing errors. Further, a comparative analysis of the proposed link with previous literature illustrates a better performance in terms of spectral efficiency and figure of merit (maximum transmission range \({\times} \) information transmission rate). The integration of PDM-QPSK with coherent detection and DSP provides a viable platform to develop spectral-efficient IsOWC links.

卫星之间的光学无线通信（IsOWC）链接已被许多研究人员开发为一种可行的技术，可以使用光载波信号和外层空间作为传播介质，在两颗或更多卫星之间传输信息。IsOWC链接可以安全地在全球范围内传输信息。本研究讨论了一种使用偏振分频多路正交相移键控（PDM-QPSK）方案的频谱有效的高速单通道IsOWC系统。相干检测已在接收器终端使用，以提高接收器灵敏度。在接收机处已经使用了一种数字信号处理（DSP）模块，以减轻由于非线性影响而造成的损失并估计载波相位。我们通过研究所需的光信噪比（OSNR）以实现目标误码率（BER）来分析建议的链路性能。报告的结果表明，在40,000 km时具有BER良好的忠实160 Gbit / s传输。此外，我们通过数值研究链路的OSNR性能以增加指向错误。此外，对提议的链接与以前的文献进行的比较分析表明，在频谱效率和品质因数（最大传输范围）方面有更好的性能。\（{\ times} \）信息传输速率）。PDM-QPSK与相干检测和DSP的集成为开发频谱高效的IsOWC链路提供了一个可行的平台。