IEEE Journal of Oceanic Engineering · 2014 · 181 citations · 32 references
EngineeringMarine EngineeringOcean EngineeringOcean AcousticsSubsea EngineeringUnderwater AcousticsChannel CapacityChannel CodingModulationUnderwater Acoustic CommunicationUnderwater CommunicationUnderwater Sound PropagationAdaptive ModulationCodingMode Switching StrategyOrthogonal Frequency-division MultiplexingSignal-to-noise RatioTransmission ParametersUnderwater Acoustic Signal ProcessingUnderwater Channel Estimation
Underwater acoustic channels are fast varying spatially and temporally according to environmental conditions. Adaptive modulation and coding (AMC) is appealing for underwater acoustic communications to improve the system efficiency by matching transmission parameters to channel variations. In this paper, we construct an AMC system with a finite number of transmission modes in the context of underwater orthogonal frequency-division multiplexing (OFDM). We propose the effective signal-to-noise ratio (SNR) computed after channel estimation and channel decoding as a new performance metric for mode switching, which is shown to predict the system performance more consistently than the input SNR and the pilot SNR. Real-time AMC tests have been conducted in a recent sea experiment to maximize the transmission rate with a given transmission power.
32
Fundamental trade-offs on green wireless networks
Yan Chen, Shunqing Zhang, Shugong Xu et al. · IEEE Communications Magazine · 2011 · 1.2K citations