Sammendrag
In this paper, we present a wideband single-input
single-output (SISO) car-to-car (C2C) channel model based on a
geometrical semicircular tunnel (SCT) scattering model. Starting
from the geometrical scattering model, a reference channel model
is derived under the assumption of single-bounce scattering in
line-of-sight (LOS) and non-LOS (NLOS) propagation environments.
In the proposed channel model, it is assumed that an
infinite number of scatterers are uniformly distributed on the
tunnel wall. Starting from the geometrical scattering model,
the time-variant transfer function (TVTF) is derived and its
correlation properties are studied. Expressions are presented
for the two-dimensional (2D) time-frequency correlation function
(TFCF), the temporal autocorrelation function (ACF), and the
frequency correlation function (FCF). Owing to the semicircular
geometry, we reduced the originally threefold integrals to double
integrals in computations of the correlation functions, which
are easy to solve numerically. From the TVTF characterizing
the reference model, an efficient sum-of-cisoids (SOC) channel
simulator is derived. Numerical results show that both the
temporal ACF and the FCF of the SOC channel simulator match
very well with those of the reference model.
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