Practical Evaluation of Carrier in Carrier Technique for Spectrum Utilization

Abstract

The wide use of satellites in communication systems technique has become motivated for the next satellite technique. In satellite communication, the bandwidth is limited. So the radio spectrum is being utilized more efficiently, by using different multiple access techniques but still the dedicated bands for each satellite services remain limited. A new Technique called Carrier in Carrier (CnC) or sometimes Paired Carrier Multiple Access (PCMA) is being proposed by Comtech Modems. It allows the use of the same spectrum for downlink and uplink, thus results in saving 50% of the bandwidth. In this thesis, Matlab software was used to calculate CnC link budget, and BW utilized for CnC and SCPC. A practical evaluation that compares the CnC and SCPC utilization has been done. The results for simulation and practice evaluation proved that CnC technique reduce the BW consumed by SCPC technique to 50%.