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The conventional broadband active noise control (ANC) system may not be able to function well when the target noise contains both wideband and narrowband components simultaneously. Feed-forward hybrid active control has attracted quite a lot attention recently, as it can effectively suppress both components at the same time. Such hybrid ANC system consists of three tightly integrated subsystems, namely,...
Narrowband active noise control (ANC) systems enjoy good performance where sinusoidal signals dominate in the primary noise, on condition that a reference signal of the same frequencies with the primary noise is given. However, frequencies of the reference signal provided by nonacoustic sensors are usually different from that of the primary noise due to temperature changes, aging, etc. Such frequency...
The existing adaptive synchronization technique based on the stability theory and invariance principle of dynamical systems, though theoretically proved to be valid for parameters identification in specific models, is always showing slow convergence rate and even failed in practice when the number of parameters becomes large. Here, for parameters update, a novel nonlinear adaptive rule is proposed...
In this paper we proposed a novel approach of channel estimation based on wavelet and MMSE. Recently, there have been tremendous demands for high-speed data transmission in underwater acoustic communications. Accurate channel estimation is necessary for coherent detection of the underwater acoustic orthogonal frequency division multiplexing (OFDM) signals. Pilot-assisted channel estimation using training...
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