Method of generating a reference function for a pulse...

H - Electricity – 04 – B

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H04B 1/66 (2006.01) G01S 13/28 (2006.01) G01S 13/90 (2006.01)

Patent

CA 2069979

In a method of generating a reference function for pulse compression of frequency, phase and/or amplitude-modulated signals, a reference signal (ho(t)) corresponding to a conjugated complex function of an error-free frequency- modulated signal (so(t)) and a signal (sf(t)) containing phase and amplitude errors are generated in two following FFT units by a Fourier transformation in the form of signals (Ho, Sf) present at the outputs thereof. Thereupon, the signal (¦Ho¦2) is generated from the output signal (Ho) of the one FFT unit by means of an intensity- forming unit and the signal (1/Sf) is generated from the output signal (Sf) of the other FFT unit by means of a reciprocal-forming unit and said two signals (¦Ho¦2, 1/Ff) are multiplied together in a following multiplying member; finally, the output signal (Hi) of the multiplying member is subjected in an IFFT unit to an inverse transformation for generating the reference function (hi(t)) in the time domain. For performing a pulse compression in the time domain a pulse response (fo(t)) corresponding to the function (sin(x)/x) is then formed from the signal (sf(t)) and the generated reference function (hi(t)) in a convolution unit (3).

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