Low Cost Lightweight Rhenium Components

Not Available The demand for high data rate (HDR) very small aperture terminal (VSAT) networks has been increasing in the last two years. Newer network applications require a minimum of T1 data rate (1.544 Mbps). The network must also be robust for the operating conditions of VSATs- small diameter dishes with inaccurate tracking and a cluttered terrain environment. Most commercial VSAT modems support data rates in the range of 64-128 kbps but those that do support higher data rates require significantly more transponder bandwidth and larger antenna sizes. CDMA is a perfect solution for VSATs where increased complexity and transponder bandwidth is not an option. Sigtek has identified the VSAT network market as a target ideal for the further development of our existing direct sequence modems. Using our CDMA technology, we can develop a CDMA network that solves these problems. Our existing hardware supports flexible spreading codes, variable data rates, and several types of FEC. Combined with further analysis and simulation we can develop the parameters for a VSAT network that solves many of these problems. Investigation of types of FEC, spreading codes, and interference reduction will be critical in achieving a Phase II deployment.