Abstract: A method for demodulating a multiplexed stereophonic signal, the signal including a signal called the sum signal, a signal called the difference signal, and a pilot signal, the method including the following steps: removing the pilot frequency from the multiplexed stereophonic signal, the resulting signal being called the pilotless signal, and subtracting the sum signal from the pilotless signal.

Abstract: A method for demodulating a multiplexed stereophonic signal, the signal including a signal called the sum signal, a signal called the difference signal, and a pilot signal, the method including the following steps: removing the pilot frequency from the multiplexed stereophonic signal, the resulting signal being called the pilotless signal, and subtracting the sum signal from the pilotless signal.

Abstract: The invention relates to a method for decoding a received RDS signal (R), comprising the following steps: determining an extreme value from among the absolute values of the RDS signal (R) integrals obtained in an elementary range interval (Te), and sliding from a starting point in at least one slide range (Tg); and extracting a binary pattern “0” if the extreme value is a minimum value, and a binary pattern “1” if the extreme value is a maximum value.

Abstract: A method for decreasing multi-path interference, for a vehicle radio receiver including at least two radio reception antennas that each receive a plurality of radio signals composed of time-shifted radio signals resulting from a multi-path effect. The plurality of radio signals combined to deliver a combined radio signal ys to be played, with: yn=WnT[G1,nS, X1,n+G2,nS, X2,n] at time n, where x1 and x2 are vectors the components of which correspond to the plurality of signals received by the first antenna and by the second antenna, respectively, G1,nS and G2,nS are scalars the components of which are the complex weights of a spatial filter and wnT is the transpose matrix of a vector the components of which are the complex weights of a temporal filter. The method includes implementation of an iterative adaptation algorithm to determine the complex weights of the spatial filter and the complex weights of the temporal filter.

Abstract: A method for decreasing multi-path interference, for the implementation thereof in a vehicle radio receiver including a radio reception antenna that receives a plurality of radio signals corresponding to an emitted radio signal, the plurality of signals received by the antenna being composed of time-shifted radio signals, the plurality of signals being intended to be combined in order to deliver a combined radio signal zn to be played, with zn=WnTYn, the method aiming to determine the complex components of the vector of complex weights and including: introducing a temporal correlation, between the real and imaginary parts of the complex weights, that is dependent on the time shift between said received signals, by the expression of the complex weights in polar coordinates, implementing an iterative adaptation algorithm in order to determine the gains and delays of said complex weights able to keep constant over time the modulus of zn.

Abstract: A method for decreasing multi-path interference, for the implementation thereof in a vehicle radio receiver including a radio reception antenna that receives a plurality of radio signals corresponding to an emitted radio signal, the plurality of signals received by the antenna being composed of time-shifted radio signals, the plurality of signals being intended to be combined in order to deliver a combined radio signal zn to be played, with zn WnTYn, the method aiming to determine the complex components of the vector of complex weights and including: introducing a temporal correlation, between the real and imaginary parts of the complex weights, that is dependent on the time shift between said received signals, by the expression of the complex weights in polar coordinates, implementing an iterative adaptation algorithm in order to determine the gains and delays of said complex weights able to keep constant over time the modulus of zn.

Abstract: A method for decreasing multi-path interference, for a vehicle radio receiver including at least two radio reception antennas that each receive a plurality of radio signals composed of time-shifted radio signals resulting from a multi-path effect. The plurality of radio signals combined to deliver a combined radio signal ys to be played, with: yn=WnT[G1,nS, X1,n+G2,nS, X2,n ] at time n, where x1 and x2 are vectors the components of which correspond to the plurality of signals received by the first antenna and by the second antenna, respectively, G1,nS and G2,nS are scalars the components of which are the complex weights of a spatial filter and wnT is the transpose matrix of a vector the components of which are the complex weights of a temporal filter. The method includes implementation of an iterative adaptation algorithm to determine the complex weights of the spatial filter and the complex weights of the temporal filter.

Abstract: The invention relates to a method for decoding a received RDS signal (R), comprising the following steps: determining an extreme value from among the absolute values of the RDS signal (R) integrals obtained in an elementary range interval (Te), and sliding from a starting point in at least one slide range (Tg); and extracting a binary pattern “0” if the extreme value is a minimum value, and a binary pattern “1” if the extreme value is a maximum value.

Abstract: A blind channel equalizer device for a radiofrequency receiver suitable for modulating the constant envelope signal of the transmission includes: an adjustable linear digital filter, defined at a point in time by the coefficients) thereof, able to filter an input signal in order to produce an output signal; an estimator able to estimate a power of the input signal; an adapter able to adapt the filter by calculating the coefficients of the filter at a point in time by subtracting, from the filter coefficients at a preceding point in time, the gradient of a cost function assigned with a correction coefficient. The cost function includes a first distance criterion between the square of the output signal and the power, wherein the correction coefficient is a product including a constant convergence coefficient and a scaling coefficient inversely proportional to the square of the power. Also disclosed is a related Radiofrequency receiver.

Abstract: A blind channel equalizer device for a radiofrequency receiver suitable for modulating the constant envelope signal of the transmission includes: an adjustable linear digital filter, defined at a point in time by the coefficients) thereof, able to filter an input signal in order to produce an output signal; an estimator able to estimate a power of the input signal; an adapter able to adapt the filter by calculating the coefficients of the filter at a point in time by subtracting, from the filter coefficients at a preceding point in time, the gradient of a cost function assigned with a correction coefficient. The cost function includes a first distance criterion between the square of the output signal and the power, wherein the correction coefficient is a product including a constant convergence coefficient and a scaling coefficient inversely proportional to the square of the power. Also disclosed is a related Radiofrequency receiver.