Mobile-satellite systems: a perspective on technology and trends

Upto just past the turn of the century several mobile-satellite systems will be in commercial operation. These systems will co-exist with terrestrial cellular systems augmenting their coverage and providing wide area roaming via the use of dual-mode (satellite-cellular) phones. Handheld phones that are competitive in size and features with cellular phones are a key factor for commercial success of a dual mode service. The design of such a system is challenging. The technical challenges and requirements on mobile satellite systems for providing good service to small handheld phones are reviewed.