Patent ID: 6545990
Filing Date: 2003-04-08
Classification: H04W

Abstract:
A system for providing a data communication service over wireless radio links, the system dedicating at least one radio channel for data services only, and the dedicated channel not being used for providing a voice service, the system comprising:a modulator, for modulating data to be transmitted over the dedicated channel, the modulator producing a modulated data signal having a bandwidth which is the same as modulated signal bandwidth of a voice signal modulated according to a digital wireless air interface standard for voice signal communication; a radio frequency upconverter, for upconverting the modulated data signal to a radio carrier frequency such that a channel spacing between the modulated data signal and other radio signals in the system is compatible with a channel spacing specified by the digital wireless air interface standard; and an encoder, for encoding the data prior to feeding the data to the modulator, the encoder being optimized for data services and using a different encoding scheme than an encoding scheme specified for voice signal communication by the digital wireless air interface standard.