宽带雷达数字接收机数据处理方法研究.pdfVIP

摘 要 II Abstract Abstract In the electronic battlefield, we faced with more and more serious electromagnetic environment, the wider bandwidth and the more kinds of signal should be processed, and when the radar worked as a passive receiver in the context of the electronic war, the radar receiver usually need a wide bandwidth and total probability signal interception and a real-time full-ability to process multi-signal processing, wideband radar is one of the trends of radar development. However, in the bandwidth radar receiver system, the speed of high-precision high-speed A/D sampling device has a big shortage to the real-time processing ability of the processor existed. It limits the development of real-time data processing. This paper focuses on the modern broadband digital signal receiving, at first analyzing of the model of digital receiver system. Aim at solving the low rate of the following digital processing could not match with the converter rate of high-speed ADC at the front-end. The paper gives a brief introduction of the two data-rate conversion method, which band pass sampling and digital down-conversion technology. Discussed Hilbert transform, polyphase filter based on orthogonal transformation such as the number of possible digital down conversion architecture. Aim to the characteristics of the large bandwidth for wideband radar signal, using the software radio in the digital channelized receiver concept, combined with the fast and efficient multi-phase filtering of FFT algorithm, providing a new direction for real-time digital receiver for wideband radar data processing.