Direction Finding in the Presence of Complex Electro-Magnetic Environment

摘要

The effects of complex electromagnetic environment on high resolution directionfinding algorithms is investigated. It is demonstrated that mutually compiling adversely affects the resolution capabilities of the MUSIC algorithm. A technique utilizing the terminal impedance matrix is devised to compensate for the mutual coupling effects. Simulation studies show the efficiency of this procedure. The effect of a near field scatterer on the performance of the MUSIC algorithm is also investigated.Interference power, as little as 15dB below the signal power from the near field scatterer greatly reduces.the resolution capabilities of the MUSIC algorithm. A new away configuration is devised to suppress the interference. Modification of the MUSIC algorithm to account for the change in the array configuration restores the performance of the MUSIC algorithm. Simulations carried out using an electromagnetic model of the array and an edge type near field scatterer demonstrate the validity of the technique.