Derivation of monopulse angle accuracy for phased array radar to achieve Cramer-Rao lower bound

Abstract

Derivation of monopulse angle accuracy for phased array radar to achieve Cramer-Rao lower bound is presented in this paper. Antenna element positions originating from antenna center are used for difference beam taper in this monopulse angle estimation. For uniform linear array, the accuracy is 1.16 times higher than conventional monopulse method. In other words, SNR can be reduced by 1.3 dB to achieve required angle accuracy. Suboptimal difference beamforming taper for the subarray-based digital beamforming radar is also derived.

Four‐channel monopulse angle estimation for phased array radar with elliptical plane

“…It has been widely used in precision tracking radar to achieve accurate tracking and measuring of the targets. It is also applied in various kinds of modern search radar to improve the angle estimation accuracy [4–6]. In practical application, the antenna array is usually divided into four quadrants, and the received signals of these quadrants are transmitted to the sum–difference network to form the sum signal, the delta‐azimuth signal and the delta‐elevation signal [7, 8].…”

Contribución a la integración de cabezales de radiofrecuencia y estructuras radiantes para sistemas radar de exploración superficial con configuración de array digital

“…Figura 19: Funciones monopulso con un enventanado convencional y de Bayliss para la dirección de 0° La posibilidad de utilizar enventanados diferentes para el diagrama Suma y el Diferencia, junto con el efecto del nivel de los primeros lóbulos del diagrama Diferencia en la pendiente monopulso, ha sido objeto de estudio para reducir el error rms en el estimador de DoA. En [Takahashi_12], [Takahashi_13] y [Takahashi_18] se estudia un enventanado del diagrama Diferencia para que el error rms del estimador coincida con la cota de Cramer-Rao. En [Takahashi_18] se hace un análisis teórico de este enventanado y se presentan simulaciones para una dirección de apuntamiento de 0°.…”