Sensitivity of the Adaptive Nulling to Random Errors in Amplitude and Phase Excitations in Array Elements

Authors

  • Jafar Ramadhan Mohammed College of Electronics Engineering, Ninevah University
  • Khalil Hassan Sayidmarie College of Electronics Engineering, Ninevah University

Keywords:

Adaptive Antennas, Antenna Arrays, Errors In Amplitude And Phase Excitations, Null Steering,

Abstract

Adaptive antenna arrays have shown their effectiveness and powerful capabilities in modern communication and radar systems. However, maintaining this effectiveness under conditions of random errors in their element excitations is the most challenging problem. In this paper, the degradation in performance, exhibited as the elevation in the sidelobe level and changing the angular locations of the desired nulls, due to random errors in the phase and amplitude of the element excitations is investigated. First, an efficient constrained optimization approach was used to synthesize an adaptive linear array. The approach maximizes the gain in the desired direction and rejects undesired interfering signals by placing nulls towards their angles of arrivals. Then, the effects of random amplitude and phase errors in the element excitations were investigated. Simulation results showed that the nulls and the sidelobe level in the adaptive arrays are more sensitive to random errors in element phase excitations as compared to amplitude excitations.

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Published

2018-01-15

How to Cite

Mohammed, J. R., & Sayidmarie, K. H. (2018). Sensitivity of the Adaptive Nulling to Random Errors in Amplitude and Phase Excitations in Array Elements. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), 10(1), 51–56. Retrieved from https://jtec.utem.edu.my/jtec/article/view/2023

Issue

Vol. 10 No. 1: January - March 2018

Section

Articles

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