IET Signal Processing

A new state equation and non-linear operator-based approach to estimation is introduced for discrete-time multi-channel systems. This is a type of deconvolution or inferential estimation problem, where a signal enters a communications channel involving both non-linearities and transport delays. The measurements are corrupted by a coloured noise signal, which is correlated with the signal to be est... View full abstract»

This study introduces a new scheme for steganalysis of the least significant bit (LSB) embedding, based on the idea of closure of sets (CoS), which is independent of the type of cover signal, applicable to both spatial and transform domains. The CoS is referred to as some special subsets that could be found in a common space whose elements relate to higher-order statistical properties of the signa... View full abstract»

This study considers the problem of direction-of-arrival (DOA) and polarisation estimation based on a single six-component electromagnetic vector-sensor. A regularised parallel factor analysis (PARAFAC) model that fuses both second- and fourth-order statistics of the sensor signal is established within the regularised framework. The steering vectors can be uniquely identified by exploiting the lin... View full abstract»

A modified matrix pencil method (MPM) inspired by interpolated arrays is proposed for the problem of parameter estimation in dispersive media obeying a frequency power law. A direct consequence of the arising dispersive signal model is that the Hankel prediction matrix can no longer be expressed using the Vandermonde decomposition, which hinders the direct application of all matrix-shifting techni... View full abstract»

The restricted structure (RS) optimal deconvolution filtering problem for multi-channel (linear and non-linear) discrete-time systems is considered. The main contribution of this study lies in developing the numerical procedure for designing reduced order estimators in multi-variable cases. Two simulation examples are used to illustrate the results. These are the enhancement of the lungs and the h... View full abstract»

There is rarely a method that can deal with the direction of arrival (DOA) estimation of coherent signals in the presence of unknown mutual coupling. Based on the special structure of mutual coupling matrix for uniform linear array (ULA), an improved spatial smoothing algorithm for DOA estimation of coherent signals is proposed. The DOAs can be accurately estimated without any calibration sources ... View full abstract»

Many sophisticated high-resolution methods have been proposed. The study describes the practical experience in the combined application of superresolution and autocalibration methods for the resolution of multipath signals. An experimental linear array antenna has been used to perform superresolution after applying autocalibration to signals from one or several radiating sources, for example base ... View full abstract»

The authors consider a high-performance discrete Fourier transform (DFT)-modulated finite impulse response (FIR) filter bank with sharp transition width. The design of this filter bank is very expensive by the standard method, and hence the frequency response masking (FRM) technique is developed so as to reduce the complexity in the design process. The relationship between the interpolator in the ... View full abstract»