Method of reception and receiver for a radio navigation...

Details Method of reception and receiver for a radio navigation... Method of reception and receiver for a radio navigation...

G - Physics

01

S

G01S 19/24 (2010.01) H04B 1/7073 (2011.01)

Patent

CA 2661894

To receive a radio navigation signal modulated by a modulation waveform, the modulation waveform comprising a component BOC(n1,m) and a component BOC(n2,m), n2 being strictly less than n1, a correlation is performed between a prompt local waveform and the modulation waveform and a correlation is performed between a shifted (forward or backward) local waveform and said modulation waveform, over a time interval of duration T. The prompt local waveform is generated in the guise of a binary waveform comprising over said time interval at least one waveform segment BOC(n2,m) of a total duration of (1-.alpha.A)T over said time interval, .alpha.A being a parameter greater than or equal to 0 and strictly less than 1. The shifted local waveform is generated in the guise of a binary waveform comprising over said time interval at least one waveform segment BOC(n1,m) of a total duration of .alpha.BT over said time interval, B being a parameter strictly greater than 0 and less than or equal to 1, and .alpha.A being different from .alpha.B.

Pour recevoir un signal de radionavigation modulé par une forme d'onde de modulation, la forme d'onde de modulation comprenant une composante BOC(n1,m) et une composante BOC(n2,m), n2 étant strictement inférieur à n1, on opère, sur un intervalle de temps de durée T, une corrélation entre une forme d'onde locale prompte et la forme d'onde de modulation et une corrélation entre une forme d'onde locale décalée (en avance ou en retard) et ladite forme d'onde de modulation. La forme d'onde locale prompte est générée en tant que forme d'onde binaire comprenant sur ledit intervalle de temps au moins un segment de forme d'onde BOC(n2,m) d'une durée totale de (1-.alpha.A)T sur ledit intervalle de temps, .alpha.A étant un paramètre supérieur ou égal à 0 et strictement inférieur à 1. La forme d'onde locale décalée est générée en tant que forme d'onde binaire comprenant sur ledit intervalle de temps au moins un segment de forme d'onde BOC(n1,m) d'une durée totale de .alpha.BT sur ledit intervalle de temps, B étant un paramètre strictement supérieur à 0 et inférieur ou égal à 1, et .alpha.A étant différent de .alpha.B.

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