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The main characteristics of underwater acoustic (UWA) channel are Narrow bandwidth, strong interference caused by multi-path and severe noise. At the same time, these disadvantages have been always obstructed the development of high speed and fidelity underwater data transmission. This paper discusses the performance of integration of Trellis-coded modulation (TCM) and OFDM; furthermore, this transmission...
Turbo code is proposed for underwater acoustic communication (UWA) based on orthogonal frequency division multiplexing (OFDM). In this paper, performance of turbo code under different modulations are studied and simulated. Simulation results proof that turbo code has a better performances than other method which not use channel code or use convolutional code in higher signal-to-noise (SNR), when using...
Recent years, OFDM is attempted to use in underwater acoustic communication. But CP-OFDM and ZP-OFDM using overlap-add method have a bad performances when channel is severe frequency-selective, especially with channel nulls, and this is often encountered in underwater acoustic channel. ZP-OFDM using complicated channel equalization on the premise of the channel transfer matrix is Toeplitz matrix not...
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