An underwater acoustic sparse channel estimation variable step sparsity adaptive match tracking method
An adaptive matching and sparse channel technology, which is applied in the field of adaptive matching and tracking based on variable step size sparsity based on compressed sensing, which can solve the problem of increased computational complexity, too large step size, and the difficulty of taking into account system reconstruction with the fixed step size of SAMP algorithm. Accuracy and computational complexity, etc., to achieve the effect of increasing the amount of calculation, improving the recovery accuracy, and avoiding the decline of the estimation accuracy
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[0044] The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.
[0045] The present invention is based on a discrete OFDM system, and the system architecture is as figure 1 As shown, the transmitter first converts the binary data to be sent into a complex sequence through constellation mapping, and then divides the high-speed serial data stream into multiple parallel data streams and modulates them on different subcarriers. The subcarriers need to maintain orthogonality. The transmitting end inserts the known pilot signal into it according to a certain rule, and after the transmission through the underwater acoustic channel, the receiving end extracts the pilot information, and the underwater acoustic signal can be obtained by ...
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