Underwater acoustic network reservation multi-access method based on active time reversal
A time-reversal, underwater acoustic network technology, applied in network traffic/resource management, multiplexing communication, orthogonal multiplexing system, etc., can solve the problem of limited bandwidth and energy consumption, low channel utilization, energy problems such as low utilization, to avoid transmission conflicts, reduce network energy consumption, and save energy
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[0025] The present invention will be further described below in conjunction with the drawings and embodiments.
[0026] Time Reversal (TR) processing is based on the principles of transmission reciprocity and time reversal invariance, and can use the space-varying characteristics of complex multipath channels to achieve time compression and spatial focus of the received multipath signals. On the one hand, the time focus of the active TR enables the multipath signals at the target node to be superimposed in the same phase at the same time, realizing multipath diversity, effectively canceling the inter-symbol interference and improving the signal-to-noise ratio; on the other hand, the active TR The spatial focus makes it possible to receive strong and time-compressed signals only at the target node, and the received signal energy at other locations in space is very small, which greatly reduces the energy pollution of the signal at non-target nodes, thereby achieving suppression of n...
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