Estimating the Directions of Arrival of Narrow Band Signals using Spatial Tuned Filter
In this paper, we present a novel way of estimating the direction of arrival (DOA) of narrow band signals using beam-steering technique. The coefficients for steering the beam are derived using a second order autoregressive (AR) narrow-band filter. Mapping an AR(2) process into spatial domain is not viable and hence, an equivalent FIR filter is obtained, which represents a Uniform Linear Array (ULA). Closed form solution for this FIR filter coefficients is derived. Beam-steering is performed using these coefficients to obtain the DOA. Estimating the DOA is viewed as a min-max problem. The minimization is performed using simple gold-section univariate minimization technique without gradients. Results are presented in this paper for single and multiple emitters. They show that this approach gives accurate results under different signalto-noise ratio (SNR) conditions.
Kaluri V. Rangarao Shridhar Venkatanarasimhan V. Prathyusha T. Neela Pavani
Department of Electronics and Communication Engineering,Jawaharlal Nehru Technological University HYDERABAD INDIA
国际会议
2011 IEEE CIE International Conference on Radar(2011年IEEE国际雷达会议RADAR 2011)
成都
英文
319-322
2011-10-24（万方平台首次上网日期，不代表论文的发表时间）