Design And Implementation Of Embedded IF Measurement And Control Platform

Ground control equipment to send remote control signals and spacecraft uplinkmeasurement signal, receiving the transmitted signal and the spacecraft telemetry signal,measure the distance between satellite and ground and satellite speed, and real-timemonitoring and control the working status of satellite.Currently, most of IF control equipment although excellent performance, full-featured,but the high price of the device, the size and weight are larger; designed for Embedded IFcontrol equipment with small size, light weight, portable, low cost, easy to use, through theadvantages of network operation, can be used stand-alone test spacecraft, subsystem testingand the entire star AIT, also applies to the TT&C simulator testing and spacecraft in orbitsupport.Paper drawing on Software Radio realized with ARM processor and FPGA hardwareplatform as the core of universal design, implementation, monitoring and control equipmentintermediate frequency modulation and demodulation functions by loading software.Equipment can 70 MHz IF signal band-pass sampling, using all processes FPGA completedigital IF processing. With parallel FFT frequency domain analysis IF carrier signalacquisition is achieved, while completing the information to accurately estimate the carrierDoppler. Using FPGA modulated signal, the ADC module on the frequency to 70 MHz,enabling a variety of modulation, so that the device has good flexibility.After the electrical performance test, measurement and control equipment in the IF USB/ UCB system, the maximum output power of the output signal of 0d Bm, the minimum outputpower of-90 d Bm, receiver sensitivity better than-90 d Bm, dynamic range better than 90 d B,video-channel transceiver signal functions properly, subcarrier frequency and a number ofother parameters can be configured, the device has good versatility.