Patent ID: 6546044
Filing Date: 2003-04-08
Classification: H04B

Abstract:
A radio transmitter/receiver for selectively transmitting digitally modulated signals in a digital mode or analog modulated signals in an analog mode comprising:digital signal processing means having an input for receiving an information signal, a first output for supplying an In-phase modulating signal I and a second output for supplying a Quadrature modulating signal Q; quadrature modulation means coupled to the first and second outputs for digitally modulating a carrier frequency in the digital mode to produce a digitally modulated signal; and analog modulation means coupled to the first and second outputs for generating an analog modulation of a carrier frequency in the analog mode to produce an analog modulated signal, wherein said In-phase modulating signal I and said Quadrature modulating signal Q bypass said quadrature modulation means in order to produce said analog modulated signal.