| Summary: | For transmission based on long-distance vortex waves, the partial receiving scheme which uses a limited angular aperture receiving and demultiplexing multi-beam can solve the difficulty of the conventional whole beam receiving scheme due to the divergence of the vortex beam. But the atmospheric turbulence is rarely considered in analyzing the stability of the radio vortex (RV) communication system based on the partial angular aperture receiving (PAAR) scheme. Here we first introduce atmospheric turbulence into the RV communication system based on the PAAR scheme. Moreover, in order to compare the effects of turbulence on the PAAR scheme and the whole angular aperture receiving (WAAR) scheme, a new turbulence attenuation degree D model is proposed, which represents the stability of the RV communication system in the atmospheric turbulence environment. Simulation results indicate that the difference of D values between PAAR scheme and WAAR scheme does not exceed the order of 0.01 when the range of refractive index structure constant C<sub>n</sub><sup>2</sup> is 10<sup>-17</sup>m<sup>-2/3</sup> - 10<sup>-12</sup>m<sup>-2/3</sup> and the distance is 90m-120m. When the range of C<sub>n</sub><sup>2</sup> is 10<sup>-13</sup>m<sup>-2/3</sup> - 10<sup>-12</sup>m<sup>-2/3</sup> and the distance is 90m-120m, D value of PAAR scheme is always smaller than that of WAAR scheme. These demonstrations suggest that the RV communication system using PAAR scheme is more stable than that using WAAR scheme in the strong atmospheric turbulence environment.
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