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Channel impulse responses (CIRs) are estimated for a doubly-spread acoustic channel in this paper by (1) estimating explicitly the path-dependent Doppler frequency shifts assuming a time-invariant CIR for individual blocks of data, and (2) estimating the time-varying CIR symbol by symbol including the phase change due to the Doppler. For the latter, a subspace based tracker is used to track the time...
The Thevenin impedance seen at a load bus is an important parameter for power system planning and operation. This paper presents a new algorithm to track the impedance parameters online. The algorithm uses the natural variations of loads connected to substations for impedance estimation. It neither depends on the load model nor requires synchronized measurements. The input data are several seconds...
A direction of arrival (DOA) estimation algorithm in the presence of an unknown mutual coupling is presented for a uniform circular array. This algorithm is based on the fourth-order cumulants, and the DOA of signal sources can be accurately estimated without the need of any calibration source since the coupling is blindly compensated by the inherent mechanism of the proposed method. Because of the...
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