  A detailed understanding of the dynamic processes of vehicular radio channels
is crucial for its realistic modeling. In this paper, we present multipath
components (MPCs) tracking results from a channel sounder measurement with 1
GHz bandwidth at a carrier frequency of 5.7 GHz. We describe in detail the
applied algorithms and perform a tracking performance evaluation based on
artificial channels and on measurement data from a tunnel scenario. The
tracking performance of the proposed algorithm is comparable to the tracking
performance of the state-of-the-art Gaussian mixture probability hypothesis
density filter, yet with a significantly lower complexity. The fluctuation of
the measured channel gain is followed very well by the proposed tracking
algorithm, with a power loss of only 2.5 dB. We present statistical
distributions for the number of MPCs and the birth/death rate. The applied
algorithms and tracking results can be used to enhance the development of
geometry-based channel models.
