Patent ID: 6317243
Filing Date: 2001-11-13
Classification: H04B,H04J

Abstract:
A method of upconverting a plurality of electrical signals onto an optical signal, comprising:modulating a first electrical baseband signal onto a first electrical carrier signal to form a first modulated baseband signal;modulating a second electrical baseband signal onto a second electrical carrier signal to form a second modulated baseband signal;coupling and phase shifting the first and second modulated baseband signals to form first and second coupled baseband signals, wherein the first coupled baseband signal includes the first modulated baseband signal plus a phase shifted form of the second modulated baseband signal, and the second coupled baseband signal includes the second modulated baseband signal plus a phase shifted form of the first modulated baseband signal;providing an optical carrier signal having a carrier frequency;upconverting the first baseband signal onto an optical subcarrier frequency greater than the carrier frequency of the optical carrier signal; andupconverting the second baseband signal onto an optical subcarrier frequency less than the carrier frequency of the optical carrier signal.