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Matched field processing (MFP) for passive source localization is a comprehensive application of signal processing techniques in extremely complex environment. In essence, it is a parameter estimation processor by exploiting full wave modeling of acoustic waveguide propagation. Typical MFP performance demonstrates a threshold behavior, that is, below some signal-to-noise ratio (SNR), the mean-square...
This paper proposes a communication structure which can operate reliably over doubly spread and multiple access acoustic channels. The doubly spread channel estimation is embedded into the general-sidelobe-canceller (GSC). From the combination we derive a novel spatial-temporal-frequency (STF) GSC. Such communication system can be operated in situation where multiple underwater platforms with different...
The transfer capacity is a varying value for a certain power system, which may be changed with the evolution of the system. Although the topology of a power system is usually designed in an optimizing way to maximize the transfer capability, the capability itself will be inevitably weaken because of a time lag between the increasing load and the enhancement of grid topology. Due to the lack of qualification...
This paper presents a general approach to solve the power flow with multiple kinds of VSC FACTS installed in the same power system. Traditional power flow model should be different for each type of VSC FACTS, which will increase the complexity of the calculation as well. However, this paper shows that there are characteristics in common with all FACTS controlled by voltage source converters (VSCs)...
This paper analyzes the problem of detecting a monochromatic plane wave with unknown amplitude, phase, temporal frequency and direction of arrival (DOA) in complex white Gaussian noise with unknown variance. The uniformly-most-powerful-invariant (UMPI) test is derived by using statistical invariance principle but doesn't exist unless the signal-to-noise ratio (SNR) is known. However, it provides performance...
In order to provide the passive and active array with replica vector for achieving transmitting and receiving focusing on proud and burried targets, the time reversal mirror-virtual source array-refracted spherical wave beamforming (TRM-VSA-RSBF) method is proposed. The original idea is from the work of S.C. Walker et.al. We develop their work in two aspects. First, we generalizes the method to the...
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