Abstract: Based on nonuniform L-shaped array,the paper presents a new method,JTSS algorithm,for the joint estimation of frequency,2-D arrival angles and polarization of coherent signals over a wide frequency band.The algorithm can precisely estimate the multidimensional parameters of coherent signals with same digital frequency.Getting rid of the costly multidimensional spectrum peak search,it has smaller computational load with parameters paired automatically.In addition,based on the JTSS algorithm and the characteristic of the L-shaped array,the multidimensional parameter estimation of coherent signals with the same frequency is realized successfully by a separable method.It may be implemented in parallel way for real-time processing.Computer simulation confirms its effectiveness.