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PIER PIER B PIER C PIER M PIER Letters
2007-11-14
Displaced Sensor Array for Improved Signal Detection Under Grazing Incidence Conditions
By
Raed Shubair,

    Dr. Raed Shubair

    Electrical and Computer Engineering

    Khalifa University of Science, Technology and Research

    U.A.E.

    Homepage

Rashid Nuaimi

    Dr. Rashid Nuaimi

    Communication Engineering Department

    Etisalat University College

    U.A.E.

    Homepage

Progress In Electromagnetics Research, Vol. 79, 427-441, 2008
doi:10.2528/PIER07103005
Abstract
This paper proposes a displaced sensor array (DSA) configuration for estimating the angles of arrival of narrowband sources arriving at grazing incidence directions. Unlike the conventional uniform linear array (ULA) where all the array elements are aligned along one axis, the proposed DSA configuration comprises two displaced ULAs aligned on two parallel axes in the vertical plane. The steering vectors of the two parallel arrays differ from each other by only two multiplicative phase terms that represent the space factors due to the vertical separation and horizontal displacement of the two arrays. This makes the computational load of using MUSIC algorithm with the proposed DSA configuration identical to that of ULA yet the accuracy is much higher especially for cases involving narrowband sources arriving at grazing incidence angles. Simulation results obtained show that the proposed DSA configuration outperforms the conventional ULA in terms numerical accuracy and angular resolution.
Citation
Raed Shubair, and Rashid Nuaimi, "Displaced Sensor Array for Improved Signal Detection Under Grazing Incidence Conditions," Progress In Electromagnetics Research, Vol. 79, 427-441, 2008.
doi:10.2528/PIER07103005
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