Photonic direction-of-arrival estimation based on compressive sensing

• DOI: 10.1364/ao.418897
• Publication Date: 2021-03-30T15:30:09Z
• Authors: Jingjing Cai; Xueyan Chang; Wei Liu; Tao Shang; Chao Li
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

The optical approach to estimate the direction-of-arrival (DOA) estimation of microwave signals has attracted a lot attention recently. Most existing methods are based on one-sensor array system, which converts DOA problem into an power problem. Their main disadvantage is that additional work needed represent relationship between phase shifts and powers before estimation. algorithm proposed in this paper <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi mathvariant="normal">N</mml:mi> </mml:mrow> </mml:math> -sensor ( <mml:mspace width="thickmathspace"/> <mml:mo>&gt;</mml:mo> <mml:mn>2</mml:mn> ), where vector obtained first then compressive sensing-based applied directly shift. As demonstrated by simulation results, can achieve much better accuracy robustness than algorithms considered.