Author_Institution :
Motorola Satellite Commun., Chandler, AZ, USA
Abstract :
The technical parameters of Motorola´s iridium communications system are discussed. This system is a worldwide, digital, satellite-based, cellular, personal communications system primarily intended to provide commercial, low-density, portable service via handheld, mobile or transportable user units, employing low-profile antennas, to millions of users throughout the world. Calls can be made and received anywhere in the world with a personal, pocket-size, portable unit. A constellation of small (700 kg), smart satellites are internetted to form the network´s backbone. Small, battery-powered, cellular-telephone-like user units communicate directly to the satellites
Keywords :
cellular radio; digital radio systems; personal communication networks; satellite relay systems; Iridium Communications Systems; Motorola; digital cellular radio; earth stations; handheld mobile units; low-profile antennas; personal communications system; portable service; satellite systems; transportable user units; IP networks; Internet telephony; Manufacturing; Mobile antennas; Satellite antennas; Satellite broadcasting; Satellite communication; Space technology; Telephone sets; Wireless communication;
