Ranging for stepped-FM coded radar

✍ Scribed by Akihiro Kajiwara

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 222 KB
• Volume: 82
• Category: Article
• ISSN: 1042-0967
• DOI: 10.1002/(sici)1520-6440(199908)82:8<14::aid-ecjc2>3.0.co;2-6

✦ Synopsis

The stepped-FM coded radar realizes a radar profile with excellent freedom from radar mutual interference and high resolution by using the inverse discrete Fourier transform (IDFT) of a part of the broadband transmitted signal and the narrow-band baseband signal obtained by homodyne detection. However, if the automotive radar frequency is increased beyond 60 GHz, a large measurement error occurs even for targets with small relative speed. The distance information can be detected by an algebraic method similar to that used for FM-CW radar. However, if the burst length of IDFT is increased, ranging error occurs due to change of the relative distance between the two radar profiles. In this paper, the method used in FM-CW radar is discussed. Further, a ranging method is proposed based on one radar profile and its characteristics are compared with those of the FM-CW radar system.