Digital fsk demodulator

H - Electricity – 04 – L

Patent

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Details

H04L 27/14 (2006.01) H03D 3/00 (2006.01) H04L 27/12 (2006.01)

Patent

CA 2111579

Digital FSK demodulators to be used in the telephone environment are disclosed. The demodulator according to one embodiment uses the sequential processing of a digital signal encoded in the fractional two's complement numeric representation. The use of multipliers is largely eliminated, thus enabling extensive use of simple shift registers and adders. Consequently the hardware complexity requirement is greatly reduced, thus resulting in very low cost products.

Des démodulateurs MDF numériques destinés à un environnement téléphonique sont divulgués. Le démodulateur dans une réalisation a recours au traitement séquentiel du signal numérique codé selon une représentation fractionnelle en complément à deux. L'utilisation de multiplicateurs est largement éliminée, ce qui permet de s'appuyer surtout sur de simples registres à décalage et additionneurs. Par conséquent, la complexité matérielle s'en trouve grandement réduite, ce qui donne lieu à des produits bien meilleur marché.

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