Prospects of FMCW-based frequency diverse array radar


Cetiner R., Cetintepe C., DEMİR Ş. , Hizal A.

JOURNAL OF ENGINEERING-JOE, vol.2019, no.21, pp.7299-7303, 2019 (Journal Indexed in ESCI) identifier

  • Publication Type: Article / Article
  • Volume: 2019 Issue: 21
  • Publication Date: 2019
  • Doi Number: 10.1049/joe.2019.0458
  • Title of Journal : JOURNAL OF ENGINEERING-JOE
  • Page Numbers: pp.7299-7303
  • Keywords: direct digital synthesis, signal processing, phased array radar, radar signal processing, FM radar, frequency modulation, CW radar, FMCW-based frequency diverse array radar, linear frequency, linear pulsed FMCW, local instantaneous frequency bandwidth, frequency diversity, frequency domain signal processings

Abstract

The linear frequency modulated (LFM) frequency modulated continuous wave (FMCW)-based frequency diverse array (FDA) radar concept is investigated in detail. The radar operates as a linear pulsed FMCW/FDA in the transmission (TX) mode while it operates as a pulsed FMCW/phased array (PA) in the receiving mode. The issues such as low signal-to-noise ratio (SNR) of FDA, the time-angle scanning and time-range ambiguities are studied. It is shown that the local instantaneous frequency bandwidth is much smaller than the radio frequency (RF) deviation of LFM. Positive and negative slope TX/RF locations offer frequency diversity. Time domain and frequency domain signal processings are described. A Ku band direct digital synthesis-based FMCW/FDA radar example based on the cumulative detection scheme is given and compared with an equivalent FMCW/PA radar.