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Multi-range-resolution radar using sideband spectrum energy

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4 Author(s)
Shinriki, M. ; Nippon Inst. of Technol., Miyashiro Saitama ; Takase, H. ; Sato, R. ; Susaki, H.

A radar range resolution is generally determined by its transmitted pulse width and is thus a constant parameter unrelated to the detection range. However, a method has been proposed for greatly improving a radar range resolution by using signal-processing techniques to reduce the received pulse width at the expense of a high target signal-to-noise ratio. In this method, an autocorrelation output is first obtained from a time-series representation of the received signal, and this autocorrelation output is then processed using a least-squares error-shaping filter. This creates a corresponding increase in the bandwidth of the principal frequency spectrum, thereby improving the range resolution. The relationship between this spectral distribution and the range side-lobes in cases where the transmitted signal is a simple pulse or a plain phase-modulated wave is investigated. The interference cancelling effect achieved when a radar based on the proposed scheme receives interference is also investigated

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Radar, Sonar and Navigation, IEE Proceedings  (Volume:153 ,  Issue: 5 )