The expressions of wave structure function (WSF) and long-exposure modulation transfer function (MTF) for laser beam propagation through non-Kolmogorov turbulence were derived in our previous work. In this paper, based on anisotropic maritime atmospheric non-Kolmogorov spectrum, the new analytic expression of WSF for Gaussian-beam waves propagation through turbulent atmosphere in a horizontal path is derived. Moreover, using this newly derived expression, long-exposure MTF for Gaussian-beam waves is obtained for analyzing the degrading effects in an imaging system. Using the new expressions, WSF and MTF for Gaussian-beam waves propagating in terrestrial and maritime atmospheric turbulence are evaluated. The simulation results show that Gaussian-beam waves propagation through maritime turbulence obtain more degrading effects than terrestrial turbulence due to the humidity and temperature fluctuations. Additionally, the degrading effects under anisotropic turbulence get less loss than that of isotropic turbulence.

Recently, the analytical expressions for the atmospheric-induced frequency spreads of optical waves propagating in anisotropic atmosphere turbulence were derived in our work. Meanwhile, more research also draws on the theoretical survey of maritime atmospheric turbulence. In this paper, the new expressions for the temporal frequency spreads of plane and spherical waves propagating in anisotropic maritime atmospheric turbulence are derived. Based on the new expressions obtained, the combined effects of the power law exponent, turbulence strength, turbulence scales, and the anisotropic parameter are evaluated. The analytical simulation results show that the turbulence strength and the anisotropic parameter significantly affect the curves of the temporal frequency spread. Furthermore, it is important to note that the temporal frequency spreads of optical waves in the anisotropic maritime turbulence and the terrestrial turbulence become almost identical as the value of the anisotropic parameter goes beyond five.

Reconfigurable intelligent surface (RIS) is considered to be a new technology with great potential and is being studied extensively and deeply. And the application extension of STBC in the RIS‐aided scheme provides a new train of thought for the research of channel coding. In this paper, we propose we extend the scheme of using the RIS to adjust the phase and reconfigure the reflected signal and propose the design of the RIS‐aided QO‐STBC scheme and the RIS‐aided QO‐STBC scheme with interference cancellation. Particularly in the RIS‐aided QO‐STBC scheme with interference cancellation, the design can achieve the transmission of the full rate and full diversity using an auxiliary reflection group to eliminate the influence of interference term. Also, the advantages and disadvantages of the schemes are analyzed in the paper, and the decoding algorithms with different complexity used in the proposed schemes are described. The simulation results show that the performance of the RIS‐aided QO‐STBC scheme with interference cancellation is better than that of the RIS‐aided QO‐STBC scheme and the RIS‐aided Alamouti scheme by about 5 dB and 7 dB at 10⁻³ BER because of diversity gain and coding gain.