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In this paper, a novel transmit beampattern matching design method is proposed for a multiple-input multiple-output (MIMO) radar system. Whereas previous approaches first solve the correlation matrix and then use to design the transmit signal , the proposed one-step method obtains the transmit signal directly through solving the waveform matrix . Since MIMO radar transmit beampattern matching...
Waveform design is studied for a multiple-input multiple-output over-the horizon (MIMO-OTH) radar system faced with a combination of additive Gaussian noise and signal dependent clutter. We define the waveform transmitted at each antenna as a weighted sum of a set of orthogonal sequences. Assume that different transmit antennas use the same set of orthogonal sequences, while the weighting factors...
Space-time adaptive processing (STAP) is an effective method for the clutter cancellation, but the computational complexity of the full degrees of freedom (DOF) is too large to achieve in practice. A modified dimension-reduced STAP method is proposed. By selecting auxiliary channels near the clutter ridge, this modified method is a suboptimum approach and it needs much less computational complexity...
Quaternion technique is applied to model the polarimetric statistical MIMO radar system, where electromagnetic vector sensors are employed at each receiver to exploit polarization information of reflected signal. Based on the refined quaternion model, quaternion adaptive detector and its complex counterpart are compared and analyzed. The quaternion adaptive detector outperforms its complex counterpart...
Conventional time delay estimation approaches usually only deal with direct signal model, they are not suitable for multipath environments. And most approaches can't estimate integral and fractional delay at once. In order to overcome these defects, in this paper, we propose a super-resolution time delay estimation method that takes advantage of normalized cross spectrum of observed signals for passive...
In passive localization systems based on the time difference of arrival, conventional methods usually take two steps for localization. In the first step the time differences of arrival (TDOA) are measured, which are used for localization in the second step. This two-step approach is suboptimal since each measurement of time difference is performed independently, although all measurements correspond...
Range sidelobes increase the clutter subspace so that clutter rank is significantly higher than the rank of an idealized orthogonal waveform set. A rigorous proof is provided. Simulation results verified the conclusion.
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