A high speed and robustness OFDM-based LEO transport architecture in Ka band (衛星通信) A High Speed and Robustness OFDM-based LEO Transport Architecture in Ka Band(Modem Technology)

In this paper, we propose a Orthogonal Frequency Division Multiplexing (OFDM) based Low Earth Orbit (LEO) multi-satellites transport architecture in Ka band. An essential feature of this transport architecture is that high power, the space time block code (STBC) strategy, more capable error protection schemes, and low level modulation are allocated to the robustness information that requires higher quality of service (QoS). In contrast, low power, direct map (DM) strategy, less capable error protection schemes, and high level modulation are granted to messages that can high speed. Simulation results show that it is possible to meet the requisite QoS for high speed or robust signals in urban area.