COMPLEX FILTER

摘要

The complex filter for simplifying the exiting complex filter by using an improved complex filter algorithm, includes the 1st filter multiplying a real part signal by a coefficient, the 2nd filter and the 3rd filter multiplying real and complex part signals by a coefficient, the 1st adder adding the 1st filtered signal to the 2nd filtered signal to generate a real part signal, the 2nd adder adding the 1st filtered signal to the 3rd filtered signal to generate an imaginary part signal. The filter uses logic "Zr+(Yr+Yi)Cr-Yi(Cr+Ci), Zi=(Yr+Yi)Cr-Yr(Cr-Ci)" to compose 3N multipliers and 3N adders, in comparison with the existing 4N multipliers and 4N-2 adders.