dense wavelength-division multiplexing networks waves system for high data rate communication
This paper describes new approach to construct 60-GHz-band bidirectional fiber-fed wireless access systems, which provide simple antenna base-station architecture and full compatibility with dense wavelength- division multiplexing (DWDM) fiberoptic networks. For downlink millimeter-wave signal generation, the scheme utilizes uplink optical transmitters as downlink optical heterodyne sources, which promises wavelength allocations of downlink and uplink signals that are fully compatible with those of DWDM networks. The excessive RF phase-noise originating from these uncorrelated uplink and downlink optical signals exerts negligible influence on the transmission performance because of the use of self-heterodyne transmission techniques, which make it possible to perform phase-modulated data transmission without expensive phase-locked oscillators at both transmitter and receiver sides.
60 ghz phase noise millimeter-wave communication self-heterodyne scheme