Patent ID: 6704438
Filing Date: 2004-03-09
Classification: G01S,G06T,Y10S

Abstract:
A method of providing frequency-dependent phase delay for real data, the method comprising:constructing a first complex signal from first and second real signals, the first real signal indicating first real data and the second real signal indicating second real data, said constructing the first complex signal including applying the first real signal as a real part of the first complex signal, and applying the second real signal as an imaginary part of the first complex signal; transforming the first complex signal into its frequency spectrum; multiplying the frequency spectrum of the first complex signal with a first filter frequency characteristic, the first filter frequency characteristic corresponding to a first filter having a real time-domain impulse response, said multiplying the frequency spectrum of the first complex signal creating a frequency spectrum of a filtered first complex signal; and transforming the frequency spectrum of the filtered first complex signal to create a filtered first complex signal including a filtered first real signal as a real part and a filtered second real signal as an imaginary part.