Swept delta-sigma modulation direct digital synthesis
OwnerMichael Harrell, Mark Wickertinventors
Life of this patent
Estimating the term…
Abstract
A method and apparatus are provided for modulating a signal. The method includes the steps of providing a radio frequency signal, determining a set of delta-sigma modulation coefficients based upon a frequency of the provided signal and delta-sigma modulating the generated radio frequency signal within a delta-sigma modulator using the generated set of delta-sigma modulation coefficients.
Claims26
A method of modulating a signal comprising:
- providing a chirped radio frequency signal;
- determining a set of delta-sigma modulation coefficients based upon a frequency of the provided chirped signal;
- and
- delta-sigma modulating the chirped signal within a delta-sigma modulator using the generated set of delta-sigma modulation coefficients.
The method of modulating the signal as in claim I wherein the step of adjusting a phase of the provided signal further comprises retrieving a phase calibration value from a look up table using frequency and change in frequency as a lookup index.
An apparatus for modulating a signal comprising:
- a chirped radio frequency signal;
- means for determining a set of delta-sigma modulation coefficients based upon a frequency of the provided chirped signal;
- and
- means for delta-sigma modulating the chirped signal within a delta-sigma modulator using the generated set of delta-sigma modulation coefficients.
An apparatus for modulating a signal comprising:
- a chirped radio frequency signal;
- a coefficients processor that determines a set of delta-sigma modulation coefficients based upon a frequency of the provided chirped signal;
- and
- a delta-sigma modulator that delta-sigma modulates the chirped signal within a delta-sigma modulator using the generated set of delta-sigma modulation coefficients.
Dependencies are inferred from the claim text.