Cordless time-duplex phone with improved hearing-aid...

H - Electricity – 04 – Q

Patent

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Details

H04Q 7/22 (2006.01) H04B 7/005 (2006.01) H04B 15/02 (2006.01) H04M 3/42 (2006.01)

Patent

CA 2242873

Techniques for providing a hearing aid compatible mode of transmission for a mobile station in a radio communication system are described. By adjusting a transmission envelope of a mobile station which transmits information in a burst fashion, harmonics which would normally be introduced into a hearing aid placed in close proximity with the mobile station are avoided. The modified transmission envelope provides a more gradual up and down-ramping of power to the transmitter to avoid introducing harmonics in the audio frequencies. This service can be provided at a system level in a manner which will avoid unnecessarily reducing system capacity by, for example, authenticating a user's identity, his or her subscription to this mode of operation, the mobile station's ability to modify the transmission envelope according to the present invention, and the user's desire to actually implement the hearing aid compatible mode of operation.

L'invention se rapporte à des techniques visant à réaliser un mode d'émission compatible avec un appareil de correction auditive de poste mobile d'un système de communication radio. En réglant une enveloppe d'émission d'un poste mobile qui émet des informations par rafales, on évite des harmoniques qui seraient normalement introduites dans un appareil de correction auditive placé tout contre le poste mobile. La modification de l'enveloppe d'émission permet une meilleure progressivité de la montée et de la baisse de puissance dans l'émetteur, ce qui évite d'introduire des harmoniques dans les fréquences basses. Ce service peut être fourni au niveau du système de façon à éviter de réduire inutilement la capacité du système en faisant authentifier, par exemple, l'identité d'un utilisateur, son abonnement à ce mode de fonctionnement, l'aptitude du poste mobile à modifier l'enveloppe d'émission conformément à la présente invention, et le désir de l'utilisateur d'instaurer réellement le mode de fonctionnement compatible avec un appareil de correction auditive.

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