Method and generator for generating a spread-spectrum signal
AssigneeThe European Gnss Supervisory Authority
InventorNIGEL SHERIDEN HOULT
Life of this patent
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Abstract
A method of generating a spread-spectrum signal in a navigation system comprises the steps of providing a carrier wave and a modulation waveform and modulating the carrier wave with the modulation waveform. The modulation waveform comprises a so-called anti-phase linear combination of a BOC(1,1) waveform and a BOC(m,1) waveform, expressible as α·BOC(1,1)−β·BOC(m,1), where m represents an even integer number, α and β are non-zero coefficients of the same sign, indicating the relative power split between the BOC(1,1) waveform and the BOC(m,1) waveform.
Claims14
A spread-spectrum signal generator providing a carrier wave and a modulation waveform, wherein said modulation waveform comprises an anti-phase linear combination of a BOC(1,1) waveform and a BOC(m,1) waveform, m representing an even integer number, said anti-phase linear combination being expressible as α·BOC(1,1)−β·BOC(m,1), wherein α and β are non-zero coefficients indicating the relative power split between said BOC(1,1) waveform and said BOC(m,1) waveform and wherein α and β are of same sign;
- and
- modulating said carrier wave with said modulation waveform.
A spread-spectrum signal generator configured and arranged to
- provide a carrier wave and a modulation waveform, wherein said modulation waveform comprises an anti-phase linear combination of a BOC(1,1) waveform and a BOC(m,1) waveform, m representing an even integer number, said anti-phase linear combination being expressible as α·BOC(1,1)−β·BOC(m,1), wherein α and β are non-zero coefficients indicating the relative power split between said BOC(1,1) waveform and said BOC(m,1) waveform and wherein α and β are of same sign;
- and
- to modulate said carrier wave with said modulation waveform.
Dependencies are inferred from the claim text.