Joint direction-of-arrival and Doppler frequency estimation based on artificial bee colony algorithm
Sun Xiao-dong · Journal of Jilin University · 2013
To achieve the joint estimation of Direction-of-Arrival(DOA) and Doppler frequency in array signal processing,the artificial bee colony theory and algorithm are applied to optimize the likelihood function.First,the extended observability matrix containing the angle-frequency parameters is established using state-space model.Then,the likelihood function containing the extended observability matrix is used to convert the problem from parameter estimation to nonlinear multidimensional function optimization.Finally,artificial bee colony algorithm is applied to optimize the process of finding the solutions of the maximum likelihood estimator in order to estimate the DOA and Doppler frequency.The proposed method reserves the asymptotic unbiased estimation of the maximum likelihood estimator and reduces the computational burden to calculate the solution of the likelihood function.Besides,the estimated parameters can be paired automatically.