Time-reversal multiple access method applicable to underwater acoustic network
An underwater acoustic network, time-reversal technology, applied in error prevention/detection using return channel, baseband system, digital transmission system, etc., can solve the problems of difficult to guarantee channel correlation, large number of nodes, limited bandwidth and energy consumption, etc. , to achieve the effect of reducing network energy consumption, reducing system delay, and avoiding transmission conflicts
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[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0030] Time Reversal (TR, Time Reversal) processing is based on the principles of transmission reciprocity and time reversal invariance, and can utilize the space-variant characteristics of complex multipath channels to achieve temporal compression and spatial focus of received multipath signals. On the one hand, the time focus of active TR makes the multipath signals at the target node superimpose at the same time and in phase, which realizes multipath diversity, effectively cancels the intersymbol interference and improves the signal-to-noise ratio; on the other hand, the active TR The spatial focus enables only the target node to receive a signal with strong energy and time compression, and the received signal energy at other positions in space is very small, which greatly reduces the energy pollution of the signal at the non-target node, thereby achi...
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