Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Patent
1997-05-08
2000-08-29
Bocure, Tesfaldet
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
375222, 375377, H04L 2706
Patent
active
061119229
ABSTRACT:
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.
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French Search Report from Patent Application 93 15942, filed Dec. 23, 1993.
IEEE Transactions on Communications, vol. 27, No. 9, Sep. 1979, New York, US, pp. 1296-1301, R. Wilson, et al., "Generation and Performance of Quadraphase Welti Codes for Radar and Synchronization of Coherent and Differentially Coherent PSK".
Patent Abstracts of Japan, vol. 17, No. 328 (E-1385) Jun. 22, 1993 & JP-A-05037511 (NEC).
Bocure Tesfaldet
Galanthay Theodore E.
Morris James H.
SGS-Thomson Microelectronics S.A.
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