Patent ID: 6256290
Filing Date: 2001-07-03
Classification: H04B,H04J,H04L

Abstract:
An apparatus comprising:a commutator for receiving a datastream of symbols that is to be transmitted to one wireless terminal, for distributing at least some of said datastream of symbols to a first derivative datastream of symbols and at least some of said datastream of symbols to a second derivative datastream of symbols;a first modulator for modulating said first derivative datastream of symbols onto a first carrier frequency to create a first modulated carrier;a second modulator for modulating said second derivative datastream of symbols onto a second carrier frequency that is different that said first carrier frequency to create a second modulated carrier;a first antenna for radiating said first modulated carrier;a second antenna for radiating said second modulated carrier; andmeans for switching said apparatus between a narrowband mode in which said first modulated carrier is not radiated from said first antenna and a wideband mode in which said first modulated carrier is radiated from said first antenna and said second modulated carrier is radiated from said second antenna.