SATCOM-CX

The data communications demands of the Global War on Terror (GWOT) require massive use of satellite communications channels, both military and civilian. Extensive use of the K-band civilian SATCOM links is causing congestion and is a significant cost driver. The SATCOM-CX program is exploring a novel technical concept which will enable small Special Operations teams deployed worldwide to move to the much-cheaper C-band links, without needing to carry and set up the large bulky antennas previously needed for C-band SATCOM. SATCOM-CX will develop a proof-of-concept system that will enable global multi-user access to 100 kilobits per second (kbps) SATCOM channels with hand-held radios, using the existing C-band satellite architecture. This new capability becomes possible through a new SATCOM-CX paradigm which uses multiple satellites simultaneously. Using this approach, a multitude of co-channel users send broad-beam signals that illuminate several adjacent satellites. Powerful processing algorithms then isolate the individual communication links. Using the constellation in this manner provides signal and minimizes the communication equipment load that the soldiers need to carry with them. While the increased complexity of the SATCOM-CX communication link will demand the development of dynamic and adaptive network protocols to ensure optimal performance is achieved, the concept offers substantial cost and operational benefits for dealing with GWOT data communications needs.