Analysis of heterogeneous satellite networks with multi‐user detectors. (31st January 2020) - Sirigina, Rajendra Prasad
Summary: In this work, a heterogeneous network, where both terrestrial‐ and multiple spot beam‐based geosynchronous satellite networks use the same sub‐channel, is investigated. Moreover, the satellite uses same sub‐channel to serve users across all spot beams. Apart from inter spot beam interference, satellite users also receive strong interfering signal from the terrestrial base station. The satellite receivers manage the inter system interference (ie, interference from terrestrial network) while the inter spot beam interference is mitigated through precoding at the gateway. To be specific, the following interference‐aware detectors are used to mitigate the inter system interference: successive interference canceller (SIC) and joint decoder (JD). The proposed decoders are shown to achieve better data rate and bit error rate (BER) than the interference ignorant decoder at moderate to strong interference levels. Although JD and SIC achieve same sum rate at moderate and strong interference levels, JD is shown to allow the terrestrial user achieve higher data rate than SIC. Abstract : Heterogeneous geosynchronous multiple spot beam‐based satellite network is modelled as a two‐user interference channel within each spot beam. A novel interference mitigation strategy, where the inter system interference is mitigated with interference‐aware decoder, is proposed. Although joint decoder (JD) and successive interference canceler (SIC) achieve same sum rate at moderate and strong interference levels, JD is shown to allow the terrestrial user achieve higher data rate than SIC.