In many applications of Wiener filtering to noise cancellation an external reference noise in— put is required. However, if an external reference is not available, it is still possible to suppress additive noise using a Wiener linear prediction filter (LPF) provided the signal bandwidth is significantly less than the noise bandwidth. The purpose of this paper is to provide an analytical basis f...

This paper presents a technique for reducing additive noise from audio signals which have nonstationary properties. In the technique, we model a nonstationary signal as a set of tones having various durations. Since it is important to choose an appropriate analysis window size in Spectral Subtraction (SS) for such nonstationary signals, we propose a multi-stage SS technique, in which different ...

An improved method for estimating the frequency of a single complex sinusoid in complex additive white Gaussian noise is proposed. The method uses a modified version of the weighted linear predictor to achieve optimal accuracy at low/moderate SNR while retaining its speed and wide acquisition range. Consequently, it has an advantage over known methods that use the weighted phase averager since ...

We consider the heat equation with a multiplicative Gaussian potential in dimensions d ≥ 3. We show that the renormalized solution converges to the solution of a deterministic diffusion equation with an effective diffusivity. We also prove that the renormalized large scale random fluctuations are described by the Edwards-Wilkinson model, that is, the stochastic heat equation (SHE) with additive...

This paper presents a patch-based image filtering algorithm for additive noise reduction. Our algorithm is a modification to the block matching 3D algorithm, where an adaptive thresholding was used for the collaborative hardthresholding step. The collaborative Wiener filtering step was also modified by assigning more weights for similar patches. Experimental results show that our algorithm outp...

Continuous variables in microdata can be masked for protection from disclosure through the use of an additive noise. I consider adding noise that is distributed according to a mixture of normal distributions. There are several parameters involved in constructing the additive noise. The study’s purpose is to lay down as a guide a recipe for the choices of these parameters. The proportion of reid...

Critical manifold of globally coupled overdamped anharmonic oscillators driven by additive Gaussian white noise We prove for an infinite array of globally coupled overdamped anharmonic oscillators subject to additive Gaussian white noise the existence of a well-behaved critical manifold in the parameter space which separates a symmetric phase from a symmetry broken phase. Given two of the syste...

In the paper, new and easy-to-compute closedform expressions for average symbol error probability of digital M -ary chirp communication system impaired by additive white Gaussian noise and fading are derived. Three fading environments, Rayleigh, Nakagami-m, and generalized-K, that represent most practical wireless channels are considered. The closed-form expressions derived are then used to ill...

Digital watermarking is a technology which potentially can be used to enforce the copyrights and integrity of digital multimedia data. In this paper, a communications perspective on digital watermarking is used to compute upper performance limits on blind digital watermarking for simple AWGN attacks and attacks by amplitude scaling and additive white noise. We show that the latter case can be t...

We have investigated the transport properties of multiplicative and additive noise driven spatially periodic system. The phase difference between periodic potential and periodic function in multiplicative noise term and the cross-correlation between multiplicative and additive noise can break the detail balance of the system independently to produce directed motion. The magnitude of current due...