Software-Defined Radio Subsystem Enables Satellite Communications
NASA Tech Briefs, May 2004
flexComm SDR-3000 subsystems
Spectrum Signal Processing
Burnaby, BC, Canada
604-421-5422
The Cross Link Integrated Development Environment (CLIDE) program at NASA's Goddard Space Flight Center, Greenbelt, MD, will develop communications links between satellites, enabling lower-cost constellations of satellites to provide scientific data in a timely fashion. These direct satellite-to-satellite links allow for mesh connectivity and ad hoc networking, thereby ensuring that a satellite communications network can provide full coverage of the Earth.
To simulate spacecraft in the lab and demonstrate full communications networking capabilities, including the inter-satellite cross-links, the CLIDE project will be receiving help from Spectrum Signal Processing's subsystems. Spectrum also provided software-based modem cores implemented in Field Programmable Gate Arrays (FPGA) to facilitate a faster development schedule.
"The SDR-3000 provides a rapid prototyping platform for the GLIDE program. The architecture provides both the capabilities and flexibility necessary to meet the requirements of the program," stated Jason Soloff, communication systems engineer at NASA.
The SDR-3000 family of software-defined radio subsystems is based on the CompactPCI form factor. The use of Serial RapidIO provides high-speed data throughput to match the processing devices, such as FPGAs, digital signal processors, and PowerPCs.
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