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Underwater acoustic (UWA) communication channels that vary from stationary with sparse arrivals to rapidly varying and fully reverberant present fading, multipath and refractive properties, greatly impede UWA data transmissions. In order to solve this problem, a receiver with the iterative soft-input/soft-output equalization and decoding that employs Repeat-Accumulate (RA) coding joint adaptive decision...
The fast temporal variations, long multipath delay spreads, and severe frequency-dependent attenuations of underwater acoustic communication channels are extremely complex that impedes underwater acoustic (UWA) data transmission. To alleviate this problem, channel coding is indispensable in UWA communication system to increase the reliability. In this paper, performances of LDPC codes with different...
In this paper, we propose a frame synchronization method for underwater acoustic communication on mobile platform. This new method involves transmitting signal based on hyperbolic frequency modulated (HFM) signal as a preamble of the frame, while the receiver uses a correlator which is matched to the transmitted signal. This method can provide us with good signal detection ability which is very important...
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