Automotive FM-CW Radar with Heterodyne Receiver

Tamio SAITO  Teruhisa NINOMIYA  Osamu ISAJI  Tominaga WATANAME  Hiroshi SUZUKI  Naofumi OKUBO  

IEICE TRANSACTIONS on Communications   Vol.E79-B   No.12   pp.1806-1812
Publication Date: 1996/12/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Millimeter-wave Short-range Application Systems Technology)
radar,  FM-CW,  automotive,  heterodyne,  

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An important aspect of traffic safety is the development of aids that extend the driver's time and motion perception. One promising candidate is the compact, lightweight millimeter-wave FM-CW radar now being widely studied. Although the homodyne FM-CW radar is well known form its simplicity, it has a relatively low S/N ratio. This paper describes the principles behind our newly-developed heterodyne FM-CW radar and it's evaluation results. The heterodyne FM-CE radar generates sidebands by switching a front-end amplifier and also uses the heterodyne detection technique for gaining sensor sensitivity. The heterodyne FM-CW radar's signal to noise ratio was 19.5 dB better than previously designed homodyne FM-CW radar.