A single-scatter path loss model for non-line-of-sight ultraviolet channels

Abstract

In this paper, a novel single-scatter path loss model is presented for non-line-of-sight (NLOS) ultraviolet (UV) channels. This model is developed based on the spherical coordinate system and extends the previous restricted models to handle the general noncoplanar case of arbitrarily pointing transmitter and receiver. Numerical examples on path loss are illustrated for various system geometries. These results are verified with a Monte Carlo (MC) model, demonstrating the validity of this model.

Closed-form path loss model of non-line-of-sight ultraviolet single-scatter propagation

“…The numerical results on path loss show that our model is consistent with the integral-form mode of [6] for various Tx and Rx geometries; for the cases that the model of [9] can handle, our model obtains better results.…”

“…Based on the spherical coordinate system, [4] applied trigonometry to develop a model for the case of vertical Rx pointing and arbitrary Tx orientation. Reference [5] extended the model for the case where both the Tx beam and the Rx FOV are above the horizontal plane in which the Tx and Rx lie, and [6] further extended it for arbitrary Tx and Rx orientations. For tractable analysis, [7] simplified the integral-form model of [2] to a closed-form model by assuming isotropic scattering and a continuous wave Tx.…”

“…In this Letter, we propose an approximate closed-form model based on [6] to directly handle the general noncoplanar case of arbitrarily pointing a Tx and Rx with a narrow Tx beam (i.e., small beam angle) or Rx FOV (i.e., small FOV angle). The numerical results on path loss show that our model is consistent with the integral-form mode of [6] for various Tx and Rx geometries; for the cases that the model of [9] can handle, our model obtains better results.…”

“…(2), we can see that there are negative exponential terms of r and negative exponential and quadratic terms of r 0 in the integrand. According to [6], r 0 can be expressed as a function of r. For simplicity, we assume the integrand in Eq. (2) varies approximately in terms of e −2k e r .…”

Experimental and simulated evaluation of long distance NLOS UV communication

“…In the past few years, considerable experimental and theoretical work has been performed on channel models [2][3][4][5][6][7][8][9], turbulence models [10][11][12][13], channel coding [14], modulation schemes [15], and MAC and network issues [16][17][18]. However, most of this work considers short ranges, where scintillation effects are weak and assumed to be negligible with respect to the path loss and received-energy distributions.…”