Abstract
Aerial communication is very flexible due to almost no restrictions on geographical conditions. In recent years, with the development and application of the unmanned aerial vehicle, the air-to-air communication attracts dense interests from the researchers. More accurate and precise channel modeling for air-to-air communication is a new hot topic because of its essential role in the performance evaluation of the systems. This paper presents an analytical nonstationary regular-shaped geometry-based statistical model for low-altitude air-to-air communication over an open area with considerations on ground scattering. Analytical expressions of the channel impulse response and the autocorrelation functions based on the three-ray model are derived. Based on the assumption of uniform distribution of the ground scatterers, the distributions of the channel coefficients such as time delay and path attenuation are derived, simulated, compared, and fitted. The nonstationary characteristics of the channel are observed through the time-variant distributions of the channel coefficients as well as the time-variant autocorrelated functions and time-variant Doppler power spectrum density.
Highlights
Aerial communication is useful either as a compensation of the land mobile communication network or as an independent mobile network
At the moment t 0 s, the transmitter and the receiver are at different altitudes, which are corresponding to the general scenario (GS), e.g., the altitude of the transmitter is 305 m and the altitude of the receiver is 610 m. e initial distance between the transmitter and the receiver is assumed to be 745 m, i.e., the ground distance is 680 m
We present an analytical RS-geometry-based statistical models (GBSM)-based channel model for low-altitude A2A communication over an open area in this paper
Summary
Aerial communication is useful either as a compensation of the land mobile communication network or as an independent mobile network. There are still lots of work to do in this area, for example, to obtain the analytical expressions of the nonstationary channel with different geometrical structures and to describe various channel characteristics due to the distributions of the scatterers [16, 17]. E motivation of this paper is to develop an analytical nonstationary RS-GBSM for low-altitude A2A communications over an open area, with the scatterers assumed to obey UD in a maximum delay-determined ellipsoidal scattering region.
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