Demonstration of manpack satellite communications
Award last edited on: 9/9/02

Sponsored Program
Awarding Agency
Total Award Amount
Award Phase
Solicitation Topic Code
Principal Investigator
Andrew R Cohen

Company Information

Qualcomm Inc

5775 Morehouse Drive
San Diego, CA 92121
   (858) 587-1121
Location: Multiple
Congr. District: 51
County: San Diego

Phase I

Contract Number: F19628-87-C-0175
Start Date: 6/12/87    Completed: 00/00/00
Phase I year
Phase I Amount
The portable/mobile x-band satcom terminal feasibility study, addresses a perceived requirement for an x-band satellite communications terminal that would allow portable/mobile operation at data rates up to 9600 bps with a terminal of very small size. The electronics would be small enough to be carried onto an airliner, while the antenna would be the size of a tennis ball for mobile operation, and a 12 inch diameter parabolic dish antenna for portable operation. The mobile mode of operation would include a paging feature that would inform the operator that a high data rate (9600 bps) link is desired so that the operator can stop, setup and point the dish antenna to support the higher data rate. Such a terminal would appear to have many potential applications in both commercial and government satellite communications.

Phase II

Contract Number: 16543
Start Date: 00/00/00    Completed: 00/00/00
Phase II year
Phase II Amount
Phase I studied the problem of how to provide X-band communications between a small, manpack sized and small, mobile terminals and a large hub terminal. It became evident from the link budgets that such functionality is entirely feasible at data rates up to 2400 Bps. We propose here a demonstration program which is based on an existing Ku-band two-way communication system, called omni-tracs(Tm), which is currently operating over commercial ku-band satellite transponders. Our approach to the X-band demonstration system is to use the if and baseband portions of omni-tracs(Tm), which includes all of the critical signal processing functions, and to provide a modified front end and antenna to interface with the dscs iii satellite. We believe, from the results of the phase I SBIR effort, that we can provide two-way, 75, 300, and 2400 Bps operation between a small manpack terminal and a hub. The primary objective of this program is to demonstrate X-band communications between a manpack terminal and a large hub. However, a demonstration of ku-band operation represents a viable alternative, should it prove difficult to gain access to an appropriate large dscs terminal, and is offered as an alternative.