Abstract: The invention discloses a receiver of GNSS positioning signals which has embedded computer logic to select between a first operating mode, which uses all available frequencies, and a second operating mode, which uses only part of the available frequencies but in combination with available correction data. The selection is based on a comparison of an index of quality of reception at the receiver and a computed or predicted precision/confidence level of the corrections. A plurality of corrections types are possible, including a type using a local model and a type using collaborative corrections. In some embodiments, a selection and/or a combination of a plurality of local models may be made to optimize the accuracy of the corrections.

Abstract: The invention relates to the development, control and execution of interactive software. An interactive component of the invention is configured to enable a defined interaction between the interactive digital system and an environment of the interactive digital system. It comprises a first subcomponent, defining a coupling between a second interactive component and a third interactive component. Said first subcomponent is configured, when executed by the interactive digital system, to generate an activation of the third interactive component conditional upon an activation of the second interactive component, said activation enabling the defined interaction.

Abstract: The invention discloses a receiver of GNSS positioning signals which has embedded computer logic to select between a first operating mode, which uses all available frequencies, and a second operating mode, which uses only part of the available frequencies but in combination with available correction data. The selection is based on a comparison of an index of quality of reception at the receiver and a computed or predicted precision/confidence level of the corrections. A plurality of corrections types are possible, including a type using a local model and a type using collaborative corrections. In some embodiments, a selection and/or a combination of a plurality of local models may be made to optimize the accuracy of the corrections.

Abstract: A spread-spectrum signal comprises a spreading waveform modulating a carrier wave and containing a real linear combination of a first waveform at a first waveform rate and a second waveform at a second waveform rate, the first waveform rate being distinct from the second waveform rate and both waveform rates being distinct and non-zero. The linear combination of the first and the second waveform is modulated with at least one binary sequence comprising a signal identification code.

Abstract: A method and a device for generating a modulated navigation signal which is intended to be used to position a downlink receiver. Four pseudorandom navigation codes of chip rhythms greater than 0.5 MHz are modulated onto a carrier of frequency greater than 500 MHz according to an 8-PSK modulation of constant amplitude with a modulation frequency fM such that: 8fc?fM where fc=Max(fci), and fci designates the chip rhythms.

Abstract: A spread-spectrum signal comprises a spreading waveform modulating a carrier wave and containing a real linear combination of a first waveform at a first waveform rate and a second waveform at a second waveform rate, the first waveform rate being distinct from the second waveform rate and both waveform rates being distinct and non-zero. The linear combination of the first and the second waveform is modulated with at least one binary sequence comprising a signal identification code.

Abstract: The invention concerns a method and a device for generating a modulated navigation signal which is intended to be used to position a downlink receiver. Four pseudorandom navigation codes C1, C2, C1?, C2? of chip rhythms greater than 0.5 MHz are modulated onto a carrier of frequency fp greater than 500 MHz according to an 8-PSK modulation of constant amplitude with a modulation frequency fM such that: 8fc?fM where fc=Max(fci), and fci designates the chip rhythms fc1, fc1?, fc2, fc2? of the navigation codes C1, C2, C1?, C2?, each fci value being such that fM=Ni.fci, Ni being an integer greater than or equal to 8, two navigation codes C1, C1? being quadrature modulated at frequency f1=fp?fM/8, and two other navigation codes C2, C2? being quadrature modulated at frequency f2=fp+fM/8, and the modulated navigation signal presenting a constant envelope. Application to radio navigation or radio positioning by satellites.