In the light of recent developments in optimal real L1-norm principal-component analysis (PCA), we provide the first algorithm in the literature to carry out L1-PCA of complexvalued data. Then, we use this algorithm to develop a novel subspace-based direction-of-arrival (DoA) estimation method that is resistant to faulty measurements or jamming. As demonstrated by numerical experiments, the pro...

Direction finder, an important component of electronic warfare system, is a device that detects electromagnetic waves radiated from target radar and measures its angle of arrival. Compared to the phase-comparison method, the amplitudecomparison method has simpler system, and it’s easy to miniaturize; however, relatively, its direction finding is less accurate, and it has various factors that oc...

Radio Direction Finding (DF) is a technique that identifies the bearing angle or the coordinates of an incoming radio signal(s). The primary function of DF is to get the Direction of Arrival (DOA) information. In this paper, we propose the robust system architecture for DOA estimation using the Total Forward Backward Matrix Pencil Method (TFBMP). This method works directly on signal samples of ...

This paper presents a novel direction-finding (DF) system based on a 3-axis crossed antenna array in combination with threedimensional Unitary ESPRIT. The application and design considerations are discussed and the implemented antenna array is shown. The 3-D Unitary ESPRIT algorithm is modified to solve a rank-deficiency problem in order to obtain better estimation results. The improved resolut...

Presently, three Coastal Ocean Dynamics Applications Radars, or CODARs, which are ocean surface current measuring radars, are operated around Monterey Bay, California and provide data hourly to an ONR-funded real time environmental monitoring system operated through UC Santa Cruz known as REINAS. CODARs operate using Bragg scatter of high frequency (HF) radio waves from the sea surface to infer...

A novel radio frequency sensor technology is presented for continuous monitoring of the radio frequency spectrum with large instantaneous bandwidth that can perform spectral analysis and direction finding simultaneously. The photonic receiver technology relies on a spatial spectral (S2) holographic crystal recording device that is an extreme bandwidth analyzer and correlator (EBAC). The S2 EBAC...

The increasing demand for wide bandwidth wireless communication in the context of a finite available frequency spectrum has led to an acute need for spectrum-efficient technologies. One solution is the Cognitive Radio approach, a device aware of the environment and able to modify its own parameters accordingly in order to optimize the performance. An important capability that leads to a higher ...