Patent ID: 6407837
Filing Date: 2002-06-18
Classification: H04J

Abstract:
A data transmission system, comprising:first and second bandwidth efficient modulation modulators for encoding data for transmission using a microwave carrier signal to produce first and second carrier signals having a first carrier frequency; a downconverter for downconverting the carrier signal output by the first wavelength division multiplexed modulator to a lower carrier frequency; a combiner for combining the downconverted and second carrier signals to provide a composite microwave signal; a wavelength division multiplexed transmitter for transmitting the composite microwave signal on one wavelength division multiplexed channel over an optical fiber; a wavelength division multiplexed receiver coupled to the optical fiber for reproducing the composite microwave signal transmitted over the optical fiber; a splitter and filters for separating out the downconverted and second carrier signals from the composite microwave signal; an upconverter for upconverting the downconverted carrier signal to the first carrier frequency; and first and second demodulators for demodulating the upconverted and second carrier signals to generate the originally transmitted data.