Title :
Dependence of processing gain and interference immunity of adaptive narrow-band beam-formers on angular locations of interference sources
Author_Institution :
Mil. Tech. Coll., Cairo, Egypt
fDate :
9/1/1990 12:00:00 AM
Abstract :
The dependence of processing gain and interference immunity of adaptive narrowband linear beamformers on angular locations of single, double, and L interference sources is investigated. Corresponding expressions of these figures of merit are derived. It is found that different angular locations may correspond to the same processing gain and interference immunity. The former varies from unity to a maximum value which under certain conditions is independent of both the array geometry and the number of interference sources. The null directions of the quiescent beam correspond to unity processing gain and 100% interference immunity. However, there are always other directions where the processing gain is unity but the interference immunity is extremely small. The maximum processing gain is always associated with 50% immunity
Keywords :
antenna phased arrays; interference (signal); signal processing; adaptive narrowband linear beamformers; angular locations; antenna array; array processing; figures of merit; interference immunity; interference sources; null directions; processing gain; quiescent beam; Adaptive arrays; Adaptive control; Antenna arrays; Geometry; Interference; Narrowband; Programmable control; Servosystems; Transient analysis; Voltage;
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
