Characterization of the 5.8 GHz V2I Radio Channel in an Underground Parking Garage

This study investigates radio signal propagation at 5.8 GHz in an underground parking garage for vehicle-to-infrastructure (V2I) communication. Broadband measurements were conducted using orthogonal frequency-division multiplexing (OFDM), enabling the characterization of the radio channel in terms of path loss (PL) and temporal dispersion. The power delay profile (PDP) was obtained via inverse Fourier transform of the channel impulse response (CIR). Multipath components were identified and compared using the constant false alarm rate (CFAR) and singular spectrum analysis (SSA) techniques. The results showed that the SSA technique is effective for multipath component identification.