| 摘要(英) |
In recent years, with the continuous improvement of satellite miniaturization and payload system, as well as the reduction of the cost of low-orbit rockets, satellite communications have begun to rapidly develop towards commercialization in addition to military applications. Satellites have extremely high coverage, high data transmission rates, and transmissions are less susceptible to natural disasters. These advantages make low-orbit satellites have good commercial value. In order to ensure that the ground receiving station can receive the signal transmitted by the satellite in the future, we have made a low-orbit satellite channel simulator. Before the satellite goes into space, simulate the signal delay, frequency offset and signal attenuation of the atmospheric environment in space, so that the ground station can receive our satellite signal more stably in the future.
This thesis designs and realizes the channel simulation of low-orbit satellites on the FPGA hardware architecture of ZCU111. After the single-carrier signal is generated on the FPGA and retrieved by DAC/ADC, time-varying delay, phase change and signal gain are performed according to the specifications of low-orbit satellites. Reaching the signal of analog satellite. The hardware architecture of this paper includes BlockRAM module, Farrow Interpolator module, phase rotation module, signal gain module and RF Data Converter to realize the effect produced by low-orbit satellites.
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| 參考文獻 |
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