Spatial diversity in multichannel processing for underwater acoustic communications

Energy Detection for MIMO Decision Fusion in Underwater Sensor Network: Critical Review

“…The spatial diversity is abused by adaptive multichannel combination and on the basis of temporal diversity obtained by pulse compression. This proposed structure enhances the execution of the time reversal communication by adaptive diversity combining detailed in [12]. The capacity improvement is conceivable with the utilization of multiple-input multiple-output (MIMO) systems, MIMO communication is outline in shallow-water [13] by utilizing space-time coding at the transmitter, and MIMO decision feedback equalization at the receiver.…”

Integrated waveform for continuous active sonar detection and communication

“…However, the receiver is very sensitive to any multipath interference in the UWA channel, which seriously affects the decoding performance of the communication system. A decision feedback equaliser [22, 23] has strong tracking performance for the channel structure because updating the coefficients eliminates the inter‐code interference generated by the multipath channel. So, in this paper, a multichannel decision feedback equaliser receiver (DFER) is used to process GSFM‐com signals received by each array element at the communication receiving end.…”

Application of Diversity Combining with RLS Adaptive Filtering in Data Transmission in a Hydroacoustic Channel

“…However, the use of diversity combining in underwater communication is rarely mentioned [ 15 , 16 , 17 , 18 , 19 ] despite the fact that the methods of diversity combining are quite well described and their applications, especially in radio communication, are often presented [ 20 , 21 , 22 ]. Adaptive filtration methods and their usefulness in channel equalization [ 23 , 24 , 25 ] have also been known for a long time. Various methods of determining adaptive filters’ coefficients are presented in the literature.…”