METHOD AND DEVICE FOR COMPRESSING A WIDE BAND RADIO-NAVIGATION SIGNAL, ASSOCIATED METHOD AND DEVICE FOR CALCULATING THE CORRELATION FUNCTION OF THE SPREADING CODE OF THE SAID COMPRESSED SIGNAL
First Claim
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1. Method for compressing a wide band satellite radio-navigation signal in order to transmit it on a narrow band channel, said method comprising the following steps:
- a step of receiving a satellite radio-navigation signal,a step of spectral conversion of the said signal into a plurality N of frequency channels of reduced bandwidth,a step of time-shifting each of the channelled signals by a predetermined distinct delay, the delay being configured so as to be greater than the duration of the correlation support of the spreading code of a channelled signal,a step of accumulation of the shifted channelled signals in order to produce a compressed signal.
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Abstract
The invention relates to a method for compressing a wide band satellite radio-navigation signal in order to transmit it on a narrow band channel and to a method for calculating the correlation function of the spreading code of a satellite radio-navigation signal compressed by application of the compression method.
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Citations
14 Claims
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1. Method for compressing a wide band satellite radio-navigation signal in order to transmit it on a narrow band channel, said method comprising the following steps:
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a step of receiving a satellite radio-navigation signal, a step of spectral conversion of the said signal into a plurality N of frequency channels of reduced bandwidth, a step of time-shifting each of the channelled signals by a predetermined distinct delay, the delay being configured so as to be greater than the duration of the correlation support of the spreading code of a channelled signal, a step of accumulation of the shifted channelled signals in order to produce a compressed signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 14)
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11. Device for compressing a wide band satellite radio-navigation signal in order to transmit it on a narrow band channel, comprising:
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means for spectrally converting the said signal into a plurality N of frequency channels of reduced bandwidth, means for time shifting each of the channelled signals by a predetermined distinct delay, the delay being configured so as to be greater than the duration of the correlation support of a channelled signal, means for accumulating the said shifted channelled signals in order to produce a compressed signal. - View Dependent Claims (12)
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Specification