Abstract:

A new blind estimate of 2D angle and Doppler frequency for fluctuating target signals was proposed with sensor gain uncertainties. The model of fluctuating target signals incident was on an L shaped uniform linear array, and the space time DOA matrix of signals was deduced. The azimuths, elevations and Doppler frequencies of the fluctuating target signals with unknown array manifold due to uncertainties of array elements were calculated. When the gain of array elements is not accordant, the performance of this method also is better. This method can completely resolve the 2D angle estimate of multiple narrow band signals even with the same Doppler frequency each other. The Gaussian noises in signal sources are efficiently suppressed. This method is computationally efficient with a comparatively high resolution, and the estimations of azimuths, elevations and Doppler frequencies are automatically paired without spectral search. Simulations were presented to show the capabilities of this method.

Key words: sensor gain, three-dimensional parameter estimation, space-time DOA matrix, blind estimates