بر اساس كنترل توان و نرخ ارسال LEO بهبود كارايي سيستم مخابراتي انتقال داده در ماهواره هاي سنجش از دور

IMPROVING THE EFFICIENCY OF DATA TRANSMIT SYSTEM FOR LEO REMOTE SENSING SATELLITES BASED ON TRANSMISSION RATE AND POWER CONTROL

In this paper, an adaptive rate and power control method for the efficient transmission of LEO remote sensing satellite images is presented, which is based on compensation change of distance between satellite and ground station. A model for the LEO satellite communications channel is proposed. In the proposed scheme, it is tried that bit error probability (or received SNR) does not vary in total communication seance between LEO satellite and ground station. Simulation results are presented showing that the proposed scheme attains good performance in comparison with traditional data transmition systems.