A Double Pulse MIMO Frequency Diverse Array Radar for Improved Range-Angle Localization of Target
In this paper, we have proposed a double pulse multiple input multiple outputfrequency diverse array (MIMOFDA) radar to improve the range-angle localization of the target. Although frequency diverse array (FDA) radar has been widely used to generate both range and angle dependent beamforming, however, it is difficult for FDA to localize the target in both dimensions due to strong coupling of range and angle dimension. To overcome this inability of FDA radar, a double pulse based MIMOFDA has been presented here. MIMOFDA can be obtained by partitioning of FDA transmit array into subarrays and then transmit a unique waveform from each subarray. The resultant MIMOFDA radar will send a pulse with zero frequency increment to locate the target in angle dimension, which is followed by a pulse with suitable frequency increment to locate the target in range dimension. Using the MIMOFDA radar with double pulse method has improved the range-angle localization of the target. Simulations and results have verified the effectiveness of the proposed radar. The Cramer Rao lower bound for the proposed radar has also been derived and compared with the double pulse FDA radar.
frequency diverse array range-angle localization range dependent beamforming fda with subarrays double pulse radar