Loading Analysis of Channelized SATCOM System with Link-Margin Degree Optimization

In this letter, we investigate the loading analysis of digital channelized satellite communication (SATCOM) system operating in frequency-division multiple access (FDMA) mode, multi-frequency time-division multiple access (MF-TDMA) mode and overlay combined multiple access (OCMA) mode. In an effort to enhance link stability of these systems, a max-min optimization objective for link-margin degree (LMD) is firstly established under the constraint that all loading links are supportable. Basing on fully using the power of transmitting terminals and directly reducing the difference among all LMDs to enhance the minimum LMD as much as possible, an effective maximum value back-off searching (MVBS) algorithm is proposed for the optimization model. Finally, numerical simulations reveal that, under the constraint of link supportability, the proposed algorithm brings about considerable improvement of the minimum LMD for enhancing link stability, which effectively demonstrates the correctness of our scheme.