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Terrestrial and Satellite Digital Sound Broadcasting to Vehicular, Portable and Fixed Receivers in the VHF/UHF Bands

DSB Handbook

image of Terrestrial and Satellite Digital Sound Broadcasting to Vehicular, Portable and Fixed Receivers in the VHF/UHF Bands

This Handbook describes the system and service requirements for digital sound broadcasting (DSB) to vehicular, portable and fixed receivers, the related propagation factors, the techniques employed in the digital sound broadcasting systems, and considers relevant planning parameters and sharing conditions.

English

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Propagation Considerations in the Frequency Range 30-3000 MHz

The design, and as a consequence the cost of a terrestrial and satellite sound broadcasting system, is strongly dependent on the factors affecting the propagation characteristics on, respectively, the terrestrial and space-to-Earth path to the vehicular receiver in particular, and generally, to a lesser extent, to the portable receiver. The propagation path is subject to attenuation by shadowing due to buildings, trees, and other foliage; and to multipath fading due to diffuse scattering from the ground and nearby obstacles such as trees and buildings. The degree of impairment to the received signal level depends on the operating frequency, the receiving antenna height, the elevation angle to the satellite, and the type of environment in which the receiver is operating: whether it is an open, rural, wooded or mountainous, suburban or dense urban environment.

English

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