Method And Implementation Of Parameter Measurement Of Spaceborne Ultra-Wideband Radar Signal Based On DSP

In the dense and complex electromagnetic environment, in order to meet the development needs of the current and future electronic intelligence(ELINT) system, real-time and high-precision measurement of space-borne ultra-wideband radar signals which has low SNR and strong amplitude fluctuation within a pulse has became a hot topic. This issue realizes quick and accurate measurement of the UWB radar signal parameters based on digital channelization technology.This paper introduces the definition of space-borne UWB radar signals and common signal modulation types, including frequency modulation type within the pulse and carrier frequency modulation type between pulses. And the difficulties of the measurement are summarized based on characteristics of the ultra-wideband space-borne signals. Secondly, according to the frequency response of the signal it is proposed that the modulation type identification and parameter measurement for the space-borne ultra-wideband radar signal comprising the modulation type identification within the pulse, the measurement of frequency-domain parameters and radiation parameters. Besides, according to the characteristics of the space-borne ultra-wideband radar signal, the digital channelization technology will be used, as well as several post-processing for the measurement results, including signal integration and division for multi-radiation signals,in order to obtain more accurate measurement results. Then, a space-borne ultra-wideband radar signal processing system is proposed according to the existing chip development level and the design requirement. In this system, it is given that detailed descriptions of the DSP software design process and the program structure. Moreover, feasibility arguments for this design are conducted, and the results show that the designed DSP program will meet the bandwidth requirements, the storage capacity requirements and the real-time processing requirements. Finally, the main technical indicators of the system are tested in order to verify the performance of the system.