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Novel techniques for target detection with waveform identity in multi-static radar using bi-static configuration
J. Qumar, , R. Bhattacharjee
Published in Institute of Electrical and Electronics Engineers Inc.
2016
Abstract
In recent years, multi-static radar system has gained importance due to its improved coverage area. This radar system is an extension of mono-static radar system with better and wider detection coverage area. This system has enhanced detection capability against stealth targets and it also overcomes unwanted interferences due to electronic counter measures. This paper analyses the geometrical coverage area of the bi-static and multi-static radar system depicting the contour ranges based on the Signal to Noise Ratio (SNR). One of the key problems in the multi-static system is the identification of a particular transmitter signal from a mixture of signals. A novel method is proposed in which a transmitter identity code is made embedded with Linear Frequency Modulated (LFM) transmitted signal. A four bit transmitter identity is converted in to 12 bit code and then XORed with a Pseudo Noise (PN) sequence of twelve bits. The resultant bits are then modulated with LFM using Binary Amplitude Shift Keying (BASK) technique. Echo signals received with transmitter identity are identified through spectral analysis. The target parameters like delay, bi-static angle and range pertaining to a single target are then estimated geometrically with reference to the transmitter separately and the consecutive ranges (Rtx1, Rtx2 Rtx3,⋯) are fused using a Maximum Likelihood Estimation (MLE) technique. The simulation results include the coverage area analysis for the mono-static, bi-static and multi-static radar systems along with the detection and tracking of the target. © 2016 IEEE.