Software Radios In Airborne Telemetry Applications

SDR (Software Defined Radio) defines that on the simple and general hardware platform, various radio applications can be implemented with the help of the software which can be updated and reconfigured. SDR not only can make the wireless communication system have a good flexibility and generality, but also can make its interlinkage and update of the system very convenient. The great advantages of SDR over Radio make the apparatus of communication have a great program in its standardization. In this paper, the idea of SDR was introduced to the measure of the flight test, and some of improvements to the measure of the flight test were also introduced.The thesis focuses in depth on the application of SDR in the flight test. First, the structure of SDR and the channel of Flight Test in the remote sensing are expounded. On the basis of this theory , the applications of the SDR structure of wideband and Bandpass sampling in IF( Intermediate frequency )in Flight Test were offered: increase the sampling in IF (Intermediate frequency) in Flight Test were offered: increase the capacity of the transmitter and the terminal receiver channels without changing the apparatus of original system and on the conditions of obeying the standard remote sensing. Second, the design of hardware module including A/D Converter , DDC (Digtial DownConverter) and DSP was illustrated. In this part, the design and application of AD6644 , HSP50216 and DSP chips are fully discussed. The design of software module mainly refers to the parameter design for DDC filter and the baseband signal processing of DSP which is realized by some simulation. The results of the research reveal that the application of SDR in Fight Test are reasonable. The paper is of value in providing a reference to develop the application of SDR in Flight Test of remote sensing.