Experimental investigation of wind and temperature induced scintillation effect on optical wireless communication link

The phase uncertainty from the fringe contrast of interferogram in Doppler asymmetric spatial heterodyne spectroscopy

“…Equation ( 7) presents the measured phase uncertainty in DASH, including four significant elements, the width of isolated window function, the number of samples, the fringe contrast and SNR of the measured interferogram. To verify the effectiveness of the derived expression, the phase uncertainties were calculated from the simulated fringe patterns using two different approaches, statistical standard deviation of the measured phase error and the derived equation (7).…”

“…To be specific, the average of each group (100 frames) was regarded as a noiseless interferogram, and the difference between each frame and the noiseless interferogram was treated as the noise of this frame. As presented in [37], the method was used to assess the SNR of each frame interferogram, and the averaged SNR of each group was applied to predict the phase uncertainty through equation (7). Before taking a Fourier transform of the measured interferogram, the dark reference and DC component need to be subtracted from the measured interferogram to reduce the background contribution.…”

“…The atmospheric wind is an essential geophysical parameter in near-space environment [1], and the accuracy of the wind measurement is of great importance for better understanding and modeling the thermosphere-ionosphere (IT) system [2]. The long-term observations from the space-borne wind measuring technique have been widely used in predicting space weather, analyzing wireless communication, and atmospheric turbulence [3][4][5][6][7]. The significance of calculating the * Author to whom any correspondence should be addressed.…”

Analysis of atmospheric turbulence and vibration impact on the performance of satellite–ground laser communication beam

“…The typical method is performing Fourier transformation of the PSI method, then performing interpolating and merging based on the obtained low-frequency harmonic resampling, to realize the effect of low-frequency compensation. The phase screen of the low-frequency compensation part can be expressed as [5][6][7][8][9][10]…”

“…The typical method is performing Fourier transformation of the PSI method, then performing interpolating and merging based on the obtained low‐frequency harmonic resampling, to realize the effect of low‐frequency compensation. The phase screen of the low‐frequency compensation part can be expressed as 5‐10 $$${\varphi }_{SH}(m,n)=\sum _{p=1}^{{N}_{p}}\sum _{m^{\prime} =-1}^{1}\sum _{n^{\prime} =-1}^{1}R(m^{\prime} ,n^{\prime} )f(m^{\prime} ,n^{\prime} )\text{exp}(j2\pi {3}^{-p}\left(\frac{mm^{\prime} }{N}+\frac{nn^{\prime} }{N}\right)).$$$…”