Sidelobe Suppression with Null Steering by Independent Weight Control. (10th June 2015)

• Record Type: Journal Article
• Authors: Khan, Zafar-Ullah; Malik, Aqdas Naveed; Zaman, Fawad; Hussain, Syed Azmat; Khan, Abdul-Rehman
• Other Names: Galdi Vincenzo Academic Editor.
• Is Part Of: International journal of antennas and propagation. Volume 2015(2015)
• Publication Date: 2015-06-10
• Subjects: Electronic apparatus and appliances -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Antennes (Électronique); Ondes radioélectriques -- Propagation; Antennas (Electronics); Electronic apparatus and appliances; Radio wave propagation; Electronic journals; Periodicals; 621.382405
• DOI: 10.1155/2015/136826
• Languages: English
• ISSNs: 1687-5869

Abstract

Abstract : A uniform linear array ofn antenna elements can steer up ton - 1 nulls. In situations where less thann - 1 nulls are required to be steered, the existing algorithms have no criterion to utilize the remaining weights for sidelobe suppression. This work combines sidelobe suppression capability with null steering by independent weight control. For this purpose, the array factor is transformed as the product of two polynomials. One of the polynomials is used for null steering by independent weight control, while the second one is for sidelobe suppression whose coefficients or weights are determined by using convex optimization. Finally, a new structure is proposed to incorporate the product of two polynomials such that sidelobe suppression weights are decoupled from those of null steering weights. Simulation results validate the effectiveness of the proposed scheme.