Aisin Seiki Kabushiki Kaisha

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Terradona

Abderrahman Essebbar

Michel Gaeta

Frederic Coutant

Tarik Aouine

Luc Haumonte

A device () for reducing the interference in a received communication signal. The device includes: an adaptive filter () which uses a self-reference signal to remove a coherent and stable interfering signal from the received communication signal; a detection module () for detecting the existence of the target signal among the received communication signals; and a demodulation module () for demodulating the received communication signal when the target signal is detected. Further, this device includes: a noise-classifying device () which detects various interfering signals of the received communication signal and determines the classification of the detected interfering signals; and a switching module () for selecting the input signal for the demodulation module on the basis of the determination made by the noise-classifying device and the value when the existence of the target signal is detected.

Device and method for reducing interference in received communication signals

A circuit and method for suppressing interference components in a received signal are provided. The circuit includes an adaptive filter configured to process a first quantity of digital signal samples per unit time when the adaptive filter is operating in a first mode, and a second quantity of digital signal samples per unit time when operating in a second mode, wherein the first quantity is less than the second quantity. The method includes implementing an adaptive filter configured to operate in an adaptive mode and in a second mode having a reduced adaptability compared to the adaptive mode; operating the adaptive filter in the adaptive mode to process a first quantity of digital signal samples per unit time; and operating the adaptive filter in the second mode to process a second quantity of digital signal samples per unit time; wherein the first quantity is less than the second quantity.

Circuit and method for suppressing interference components in received signal

A pre-processing system of a signal of interest in an automatic speech recognition system in a vehicle, includes an acoustic sensor to sense the signal of interest, a non acoustic sensor to sense a non acoustic noise signal, a pre-processing unit of the signal of interest, comprising a processing section of coherent frequency bands signals for suppressing the noise from the received signal, a processing section of non coherent frequency bands signals, comprising transfer function estimation device of a signal through the vehicle cabin, and a methods selection section for determining the coherence properties of the received signal, and for selecting the processing section of coherent frequency bands signals or the processing section of non coherent frequency bands signals depending on the result of the properties of the received signal.

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Nice, France

Abderrahman Essebbar