Method and system for signal synthesis

摘要

The invention describes methods and systems for digital synthesis of electric signals. According to the invention, one or more bit-patterns are provided, each indicative of a rectangular waveform having a characteristic frequency. Further to determining a selected signal frequency to be synthesized, a selected bit-pattern associated therewith is obtained. Bits of the selected bit-pattern are cyclically serialized to generate a substantially rectangular waveform signal comprising the characteristic frequency. Then, the signal is filtered to suppress spurious frequencies outside a certain unfiltered frequency band which corresponds to the selected bit-pattern to thereby obtain a filtered signal with prominent frequency component corresponding to the selected signal frequency.

主权项

1. A method for digital synthesis of electric signals, the method comprising:
a. providing one or more bit-patterns, each indicative of a rectangular waveform having a characteristic frequency; b. determining a selected signal frequency to be synthesized and obtaining a selected bit-pattern associated therewith; c. cyclically serializing bits of said selected bit-pattern to generate a substantially rectangular waveform signal comprising said characteristic frequency; and d. filtering said signal to suppress spurious frequencies outside a certain unfiltered frequency band which corresponds to said selected bit-pattern to thereby obtain a filtered signal with prominent frequency component corresponding to said selected signal frequency, wherein a Fourier spectrum of said rectangular waveform is characterized in that a ratio between a spectral power of said characteristic frequency and spectral powers of other frequencies within said unfiltered frequency band is higher than a certain Spurious free range (SFR) to be obtained in said filtered signal.