Untitled record

THE PRESENT INVENTION IS DIRECTED TO COMPENSATING THE SIN(X)/X RESPONSE ATTENDANT THE OUTPUT SIGNALS FROM A DIGITAL-TO-ANALOG CONVERTER (57) IN SYSTEMS CONSISTING OF THE CASCADE CONNECTION OF THE OF A DIGITAL PROCESSOR (56) HAVING A NON-UNIFORM FREQUENCY RESPONS H(NT) AND A DIGITAL-TO-ANALOG CONVERTER. THIS IS ACCOMPLISHED BY ALTERING (53,54) THE PROCESSOR TO PROVIDE A FREQUENCY RESPOND H(NT)*G(NT), WHERE H(NT) IS THE IMPULSE RESPONSE OF THE PROCESSOR, G(NT) IS THE IMPULSE RESPONSE OF THE RECIPROCAL OF THE FREQUENCY RESPONSE OF THE DAC, AND THE ASTERISK REPRESENTS CONVOLUTION. ALTERNATIVELY, IF THE FOURIER TRANSFORM OF THE FREQUENCY RESPONSE OF THE PROCESSOR IS GIVEN BY F(?), AND THE DAC EXHIBITS A FREQUENCY RESPONSE S(?), WHICH IS THE FREQUENCY TRANSFORM OF THE TIME RESPONSE OF THE DAC SAMPLE AND HOLD TYPE OUTPUT, THEN THE PROCESSOR IS SUBSTITUTED WITH ONE HAVING A FREQUENCY RESPONSE DEFINED BY THE INVERSE FOURIER TRANSFORM IF(F(?)/S(?))) OVER THE FREQUENCY BAND OF INTEREST.