摘要:
A process and a circuit for carrying out the process for adapting coefficients in a modem equalizer comprises a memory cell for storing a coefficient, an adapter receiving the output of the cell and providing a first signal having a first correction, and an adder receiving the first signal and providing a second signal to the cell. The adder also receives a value k much smaller than 1 having the sign provided by a comparator comparing an initial value of the considered coefficient and its current value.
摘要:
A detector of a carrier loss in a modem receiver of a fax transmission of a document, of the type includes a first calculator of the receive signal and a first comparator of this energy with respect to a threshold. The detector further includes means for adapting said threshold between each page of the transmitted document.
摘要:
The invention relates to a device for identifying a predetermined sequence of signals arriving on a modem, the sequence having a frequency spectrum of two determined frequencies, the device including a notch filter, associated with a first magnitude calculator having an output sent on a first input of a comparator, a second input of the comparator receiving the output of a second magnitude calculator, the input of which directly receives the signals received by the modem.
摘要:
Methods for treating pathological pulmonary conditions and bleomycin associated pulmonary fibrosis administer IL-16 antagonists, for example, anti-IL-16 antibodies, to subjects.
摘要:
A device for identifying a determined repetitive sequence of predetermined signals arriving on a modem. The device includes a delay circuit so that all the words of a sequence are simultaneously present; a combination circuit for providing a combined word; a circuit for calculating the modulus of each combined word and for comparing this modulus with a threshold; a circuit for counting clock pulses corresponding to the rate at which words arrive; a circuit for inhibiting the counting circuit when the modulus of the combined word is lower than the threshold; and a circuit for providing an identification signal when a predetermined number of clock signals is counted.
摘要:
A detector of the presence of a transmission in a modem, including a circuit for determining the absolute value of a receive signal, a first averaging block of the absolute value and two first comparators with respect to two predetermined detection and loss thresholds of a transmission, and further including a second averager which is associated with two second comparators with respect to predetermined extreme thresholds which englobe the two detection and loss thresholds, the first averager having a high time constant with respect to the time constant of the second averager.
摘要:
A circuit for transmitting and receiving communications. The circuit includes a transmit block, a receive block, and an echo canceller, coupled to the transmit block and to the receive block, for determining an echo signal and subtracting it from the received signal, the determination of the echo signal involving a predetermined number N of coefficients calculated at the beginning of each of the communications in an initialization phase. The circuit periodically updates during communication a restricted group of coefficients chosen from among the most significant coefficients. The present invention also relates to an echo cancellation method.
摘要:
A device for identifying a determined repetitive sequence of predetermined signals arriving on a modem. The device includes a delay circuit so that all the words of a sequence are simultaneously present; a combination circuit for providing a combined word; a circuit for calculating the modulus of each combined word and for comparing this modulus with a threshold; a circuit for counting clock pulses corresponding to the rate at which words arrive; a circuit for inhibiting the counting circuit when the modulus of the combined word is lower than the threshold; and a circuit for providing an identification signal when a predetermined number of clock signals is counted.
摘要:
A digital phase-locked loop filter in which the incoming error signals are subject to at least one multiplication by a filtering coefficient before being digitally processed at each clock pulse to provide a filtered signal. The PLL filter includes a circuit which decrements the value of the filtering coefficients at each clock pulse during an initial operation period of the filter.
摘要:
Methods for treating pathological pulmonary conditions and bleomycin associated pulmonary fibrosis administer IL-16 antagonists, for example, anti-IL-16 antibodies, to subjects.