Algorithm for jointly estimation of TDOA/FDOA
Yougen Xu · Radio and communications technology · 2006
The estimation algorithms of CAF-SOS and CAF-HOS for TDOA/FDOA based on complex ambiguity function of second-order statistics and high-order statistics of dual-sensor observation data are discussed.We find that the CAF-SOS method has higher estimate accuracy,but not for color noise,that is the method of CAF-SOS is sensitive for correlation between sensor noises.The method of CAF-HOS can meet color noise following Gauss distribution,but has slow data convergence performance and high calculation load.In order to improve calculation efficiency,we study the two-dimensional processing method of SD-MOM based on second-order statistics.The search range is reduced to two lines from plane,which improves the overall calculation cost. Due to the disadvantage of ineffectivity for color noise of the above method,we bring forward the method of SD-CUM based on cumulation operation.