Method of doubling range resolution without increasing bandwidth in FMCW radar

Abstract

The frequency modulated continuous-wave (FMCW) technique has been used in many radar applications owing to its low requirements on radar hardware. Linear sawtooth sweep (the frequency sweeps in one direction) is one of the simplest waveforms employed by most FMCW radars. By theory and real data it is proved that by simply using the linear triangular sweep (the frequency goes first down and then up), the range resolution can be doubled without increasing the transmitted bandwidth.