Scattering functions from the naval communication channels dataset

Representative scattering functions are presented from the naval communication channels (NCC) dataset. The NCC dataset contains over-the-air measurements of a mobile HMMWV and a mobile navy ship transmitting to a fixed shore site at 1 Mbps in the 225-400 MHz military UHF band. These HMMWV and ship experiments are representative of urban Marine Corps and the naval littoral UHF line-of-sight (LOS) communication environments. For the ship operating off the coast, a single path model is appropriate with slow fading (1 Hz). For the ship in the harbor, a few large structures "punctuate" the scattering function with additional spreading to 30 /spl mu/s. In contrast, the HMMWV exhibited faster fading (10 Hz) and multiple paths spread to 7 /spl mu/s. The same "large-structure" effect is present with a few paths spread to 20 /spl mu/s.