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1. (WO1998017012) DUAL-MODE RADIOTELEPHONE APPARATUS FOR DIGITAL OR ANALOG MODULATION

Pub. No.:    WO/1998/017012    International Application No.:    PCT/US1997/017542
Publication Date: Apr 23, 1998 International Filing Date: Oct 7, 1997
IPC: H04B 1/40
Applicants: ERICSSON, INC.
Inventors: DENT, Paul, W.
Title: DUAL-MODE RADIOTELEPHONE APPARATUS FOR DIGITAL OR ANALOG MODULATION
Abstract:
A dual-mode radiotelephone capable of operation in analog or digital modes. According to exemplary embodiments, a digital signal processor receives a speech signal to be transmitted in the digital or analog mode and generates In-phase (I) and Quadrature (Q) modulating signals. The I and Q signals are supplied to a quadrature modulator for generating a digitally modulated signal and are supplied to an analog modulator for generating an analog modulated signal.