Abstract
this chapter describes the operation of a radar system. The differences and advantages of using UWB signals in the radar system, over traditional narrow band signals, are discussed. The radar equation, usually defined for narrow band signals, is redefined for UWB signals. This new radar equation is used to analyze the echo signals from targets with basic shapes, resulting in an estimative of the echo signal amplitude as a function of the target distance. The architecture of an UWB radar based in the concept of sub-sampling is defined and the constituting blocks are described. The remaining of the chapter is concentrated in analyzing the receiver channel of the radar system. This analysis is centered around the noise power level in the receive path. From this analysis a new receiver circuit for baseband UWB signals is proposed. This new circuit is an averaging switched-integrator circuit. This circuit is described in detail and a design procedure is shown.
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Paulino, N., Garção, A.S., Goes, J. (2008). UWB RADAR Receiver Architecture. In: Low Power Uwb Cmos Radar Sensors. Analog Circuits and Signal Processing. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-8410-2_3
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DOI: https://doi.org/10.1007/978-1-4020-8410-2_3
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