2016 · 61 citations · 2 references
EngineeringComputer EngineeringElectrical EngineeringDigital CommunicationPhotonicsWireless CommunicationsCommunication SystemsMillimeter-wave CommunicationsModulationOptical Communication SystemsOptical ModulationWireless NetworksHigh-speed TransmissionModulation FormatsOptical Modulation FormatsOptical TransceiversPower EfficiencyReceiver DesignTransceiver ArchitecturesTransceiver Design
High-speed signaling using NRZ has approached speeds above 50Gb/s where it is extremely difficult to maintain power efficiency and performance over a wide variety of channels and applications. PAM-4 is emerging as one way to increase throughput in such band-limited channels. Higher modulation formats help to address cost in optical systems by packing more bits/wavelength [1]. Strong momentum in standards to adopt PAM-4 reflects these significant trends in the industry. At the same time, migrating transceiver designs to current technology nodes have narrowed the power gap between traditional Analog and ADC-DSP-DAC-based systems for high-speed applications. These factors make ADC-based receivers a highly desirable choice, as is also the trend in wireless communications.
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