Multi-user underwater acoustic sensor network large-capacity cooperative transmission method
A collaborative transmission and underwater acoustic sensing technology, applied in ultrasonic/acoustic/infrasonic transmission systems, transmission systems, signal transmission systems, etc., can solve the problems of significant multipath effect, narrow effective transmission bandwidth, and large transmission delay, etc. Achieve the effect of realizing large-capacity multi-user underwater acoustic communication and realizing large-capacity transmission
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Embodiment 1
[0022] An embodiment of the present invention provides a large-capacity cooperative transmission method for a multi-user underwater acoustic sensor network, and the theoretical basis is compressed sensing technology. see figure 1 and figure 2 , the method includes the following steps:
[0023] 101: Establish a multi-user underwater acoustic sensor network model based on compressed sensing (CS);
[0024] 102: Use the underwater acoustic channel as a measurement matrix, and prove the rationality of the underwater acoustic channel as a measurement matrix;
[0025] 103: Recover the reconstruction error of the compressed signal by using a base pursuit (BP) reconstruction algorithm; select an appropriate number of cooperative relays according to the reconstruction error.
[0026] In summary, the embodiment of the present invention is based on the multi-user underwater acoustic communication network model and the inherent characteristics of compressed sensing, as well as the char...
Embodiment 2
[0028] The scheme in embodiment 1 is further introduced below in conjunction with specific calculation formulas and examples, see the following description for details:
[0029] 1. Construction of collaborative compressed sensing multi-user underwater acoustic sensor network model
[0030] The three elements of compressed sensing theory are the establishment of compressed sensing model, the selection of measurement matrix and the use of reconstruction algorithm to realize signal reconstruction.
[0031] see figure 1 , the multi-user underwater acoustic sensor network model includes: N source nodes, M relay nodes and one receiver node. source node S i (1≤i≤N), relay node R i (1≤i≤M) and the destination node D are both configured as a single antenna.
[0032] Among them, the source node S i The total transmit power is P S , the relay node R i The forwarding power adopts the method of average power distribution, and the total forwarding power is P r . Suppose the source ...
Embodiment 3
[0072] Combine below image 3 The scheme in embodiment 1 and 2 is carried out feasibility verification, see the following description for details:
[0073] The simulation picture is as follows image 3 As shown, the simulation was carried out when the signal sparsity was 5, 10, 15, and 20, respectively, by figure 2 It can be seen that when the sparsity is 5, the relay node R i The number must be greater than or equal to 30. At this time, the reconstruction error is close to zero, and high-precision reconstruction can be achieved. The same is true when the sparsity is 10, 15, and 20. The relay node R i The numbers must be greater than or equal to 40, 55, and 60 respectively.
[0074] Those skilled in the art can understand that the accompanying drawing is only a schematic diagram of a preferred embodiment, and the serial numbers of the above-mentioned embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the ...
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