Abstract:

Digital monopulse angle estimation for full digital or subarray phased array system is generally based on the monopulse ratio firstorder taylor expansion, while the monopulse ratio is always linearly constrained in adaptive digital monopulse angle estimation for mainlobe jamming suppression. However, above methods will cause large angle estimation deviation when the target visibly departs from the antenna look direction. In view of the above problems, the 2-dimension monopulse angle estimation formula for arbitrary 2-dimension digital array structure is presented, which is based on the monopulse ratio thirdorder taylor expansion. The convergence analysis of formula solution is also given. Numerical simulations illustrate that less angle estimation deviation can be obtained for the target within the mainlobe region. It also demonstrates that the target angle estimation performance is improved in the presence of mainlobe jamming. The presented method is suitable for engineering implementation for its less calculation amount.