The article reports vehicular channel measurements in the frequency band of 5.8 GHz for IEEE 802.11p standard.\nExperiments for both intra-vehicle and out-of-vehicle environments were carried out. It was observed that the\nlarge-scale variations (LSVs) of the power delay profiles (PDPs) can be best described through a two-term exponential\ndecay model, in contrast to the linear models which are suitable for popular ultra-wideband (UWB) systems operating\nin the 3- to 11-GHz band. The small-scale variations (SSVs) are separated from the PDP by subtracting the LSV and\ncharacterized utilizing logistic, generalized extreme value (GEV), and normal distributions. Two sample Kolmogorov-\nSmirnov (K-S) tests validated that the logistic distribution is optimal for in-car, whereas the GEV distribution serves\nbetter for out-of-car measurements. For each measurement, the LSV trend was used to construct the respective\nchannel impulse response (CIR), i.e., tap gains at different delays. Next, the CIR information is fed to an 802.11p\nsimulation testbed to evaluate the bit error rate (BER) performance, following a Rician model. The BER results strongly\nvouch for the suitability of the protocol for in-car as well as out-of-car wireless applications in stationary environments.
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