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 1.  Underwater-Acoustic-Communication.zip,This paper presents a review of recent results and research problems in high-speed underwater acoustic communications, focusing on the bandwidth-efficient phase-coherent methods. Experimental results are included to illustrate the state-of-the-art coherent detection of digital signals transmitted at 30 and 40 kbls through a rapidly varying one-mile shallow water channe,1556KB,downloads 0
 2.  The-use-of-barker-codes.zip,the use barker codes in doppler sonar measurements are studyed in this paper.,460KB,downloads 0
 3.  OFDM-Demodulation.zip,This work addresses the problem of OFDM transmission in dispersive underwater channels where impulse responses lasting tens of miliseconds cannot be reliably handled by recently proposed methods due to limitations of channel estimation algorithms.,380KB,downloads 0
 4.  MFSK-communication-.zip,In this paper, the implementation of an -underwater acoustic approach is developed, together with the companion problems achieving hardware reliability and low power consumption. A companion paper, MFSK The Basis for Robust Acoustical Communications, outlines a technique for achieving reliable acoustical communication,344KB,downloads 0
 5.  An-Adaptive-Channel-Estimation.zip,In this paper, an adaptive channel estimation for MIMO OFDM is proposed. A set of pilot tones first are placed in each OFDM block, then the channel frequency response of these pilot tones are adaptively estimated by recursive least squares (RLS) directly in frequency domain not in time domain. Then,410KB,downloads 0



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