A Fast DOA Estimation Based on Space-Time Direct Data Domain Approach Using Real Antenna Elements
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Abstract
Space Time Adaptive Processing (STAP) applied on signals received from different configurations of real elements using D3LS (Direct Data Domain Least Squares) in order to estimate the direction of each incoming signal. The algorithm deals with the actual desired signals as interferences and we can easily detect their directions. We use a preprocessing technique before applying D3LS STAP approach for elimination the mutual coupling effect between elements due to the use of real antenna elements. Five different antenna configurations are used: uniform linear equal spaced array, exponential spaced linear array, semicircular array, sinusoidal spaced array, and planar array. Numerical simulations are done using the three main methods of D3LS namely the forward, backward, and the forward–backward methods.
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Keywords: Direct Data Domain Least Squares (D3LS), Space Time Adaptive Processing (STAP)
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