Optics Letters · 2014 · 13 citations · 8 references
EngineeringCommunicationElectrical EngineeringDigital CommunicationMicrowave EngineeringWireless CommunicationsChannel CapacityChannel EstimationFiber-optic CommunicationMillimeter-wave CommunicationsModulationWireless Channel ModelingEqualizationMimoMimo SystemsModulation TechniquesMultiple-input Multiple-output CommunicationOrthogonal Frequency-division MultiplexingSingle-sideband ModulationSpectral Efficiency
This article proposes and experimentally demonstrates a radio-over-fiber system employing single-sideband single-carrier (SSB-SC) modulation at 60 GHz. SSB-SC modulation has a lower peak-to-average-power ratio than orthogonal frequency division multiplex (OFDM) modulation; therefore, the SSB-SC signals provide superior nonlinear tolerance, compared to OFDM signals. Moreover, multiple-input multiple-output (MIMO) technology was used extensively to enhance spectral efficiency. A least-mean-square-based equalizer was implemented, including MIMO channel estimation, frequency response equalization, and I/Q imbalance compensation to recover the MIMO signals. Thus, using 2×2 MIMO technology and 64-QAM SSB-SC signals, we achieved the highest data rate of 84 Gbps with 12 bit/s/Hz spectral efficiency using the 7-GHz license-free band at 60 GHz.
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Faster than fiber: The future of multi-G/s wireless
Jonathan Wells · IEEE Microwave Magazine · 2009 · 411 citations