In this study, the authors propose novel cooperative spatial modulation (SM) systems with two main relaying techniques [amplify-and-forward (AF) and decode-and-forward (DF)], where all nodes have multiple transmit and/or receive antennas. Most of the studies in the literature of cooperative SM systems, which combine the advantages of cooperative communications and SM systems, consider only the ...

We provide what is to our knowledge the first experimental evidence that multiple filamentation (MF) of ultra-short pulses can be induced by input beam ellipticity. Unlike noise-induced MF, which results in complete beam breakup, the MF pattern induced by small input beam ellipticity appears as a result of nucleation of annular rings surrounding the central filament. Moreover, our experiments s...

We describe two systematic procedures for synthesizing mutlipleinput translinear element (MITE) networks that produce an output current that is equal to product of a number of input currents, each of which is raised to an arbitrary rational power. By using the first procedure, we obtain a MITE network, called a two-layer network, that is relatively insensitive to mismatch in the MITE weight val...

Multiple Pointing Input System(MPIS) allows concurrent manipulation of multiple pointing devices, and is targeted as a generic input system. This paper reports on an experimental evaluation on our MPIS prototype system. The system allows concurrent manipulation of multiple pointing devices. The experiment has subjects sort 8 objects on the screen in displayed order. We found that concurrent man...

Currently, there are three broadband :LUHOHVVV/RFDOO$UHD1HWZRUNV (WLAN) standards harmonised at the physical layer (based on OFDM) that operate in the 5 GHz band, i.e. ETSI BRAN HL/2 in Europe, IEEE 802.11a in the USA and ARIB MMAC HiSWAN in Japan. This paper focuses on the use of adaptive antennas for HL/2 [ETSI00]. The system shall be adapted to work in different propagation and interference ...

Multidimensional Scaling (MDS) is a classic technique that seeks vectorial representations for data points, given the pairwise distances between them. However, in recent years, data are usually collected from diverse sources or have multiple heterogeneous representations. How to do multidimensional scaling on multiple input distance matrices is still unsolved to our best knowledge. In this pape...

We introduced a generalised Wishart process (GWP) for modelling input dependent covariance matrices Σ(x), allowing one to model input varying correlations and uncertainties between multiple response variables. The GWP can naturally scale to thousands of response variables, as opposed to competing multivariate volatility models which are typically intractable for greater than 5 response variable...

This paper proposes a procedure for transfer function identification (specification) based on least-squares estimates of transfer function weights using the original or filtered series. The corner method is then used to identify a parsimonious rational form of the transfer function. The procedure is illustrated in a simulated example; it is shown how this straightforward approach outperforms ot...

In this paper image restoration applications where multiple distorted versions of the same original image are available, are considered. A general adaptive restoration algorithm is derived based on a set theoretic regularization technique. The adaptivity of the algorithm is introduced in two ways : a) by a constraint operator which incorporates properties of the response of the human visual sys...