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Huge structures navigating underwater always have multi radiated noise sources distributed on different part. Therefore, noise source positioning is regarded as the core of noise control. In order to make the measuring system more effective, a new method for underwater near field moving sources is proposed in this paper. The new method establishes a mathematical model based on the correlation between...
In this letter, a modification of the original Hadamard codes is proposed. The modification can improve the code efficiency to 100%. Performances of these codes in the experiment are presented and analyzed.
By constructing a novel symmetric subarrays structure, a new 3-D near-field source localization algorithm is proposed. The new method can be divided into three important parts. The first part is the elevation angle estimation based on two generalized ESPRIT algorithm by a vertical uniform linear array, which are spectral search-based generalized ESPRIT and search-free generalized ESPRIT. And the second...
This paper aims to improve capacity in multi-hop OFDM system with non-regenerative relaying based on power allocation. The capacity model is presented, power allocation is analyzed based on the subsignal tuned to subcarrier of OFDM. Power allocation is decomposed to two subproblems. The first subproblem is the optimal power allocation to every hop of subsignal, when the power of each subsignal is...
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