In this article, we study the multiple-input and multiple-output (MIMO) wireless power transfer (WPT) system so as to enhance output DC of rectennas. To that end, revisit rectenna nonlinearity considering multiple receive antennas. Two combining schemes for rectennas at receiver, RF combinings, are modeled analyzed. For combining, optimize transmit beamforming, adaptive channel state informatio...

The principles of diversity combining have been known to wireless communication fraternity for decades. Diversity requires that a number of transmission paths be available, all carrying the same message but having independent fading statistics. The mean signal strengths of the paths should also be approximately the same. Proper combination of the signals from these transmission paths yields a r...

Abstract: We investigates the effect of mobile speed, channel estimation rate, diversity order on performance degradation due to error floor in a mobile Single-Input-Multiple-Output (SIMO) wireless communication system. Each diversity channel is assumed to be fast Rayleigh fading process, which is modeled as a first order autoregressive process. Diversity channels are assumed to be independent ...

It has been deemed as an effective tool of forecasting performance improvement to combine different component forecasting models. However, current nonlinear combining models are not able to meet the requirement of high forecasting accuracy in practice. To tackle this challenge, this paper constructs a hybrid, named genetic programming and least squared estimation based nonlinear combining metho...

In this paper we propose an energy efficient cooperative MIMO system. Space-time block codes (STBC) and code combining techniques are applied to utilize the inherent spatial diversity in wireless cooperative MIMO systems. We form a group of senders and receivers to provide higher order MIMO diversity and implement our STBC scheme in a distributed manner. In the receiving group, code combining i...

In this article, we develop an analytical framework for the performance analysis of cooperative amplify-and-forward (CAF) relay-based energy detection. We derive mathematical expression for the detection probability for single cognitive relay system and later extend it to multi-relay system. Our resulting expression is based on the canonical series representation of generalized Marcum Q-functio...

Earthquake time history records are required to perform dynamic nonlinear analyses. In order to provide a suitable set of such records, they are scaled to match a target spectrum as introduced in the well-known design codes. Corresponding scaling factors are taken similar in practice however, optimizing them reduces extra-ordinary economic charge for the seismic design. In the present work a ne...

Both theoretical and empirical findings have suggested that combining different models can be an effective way to improve the predictive performance of each individual model. It is especially occurred when the models in the ensemble are quite different. Hybrid techniques that decompose a time series into its linear and nonlinear components are one of the most important kinds of the hybrid model...

Recent findings in the domain of combining classifiers provide a surprising revision of the usefulness of diversity for modelling combined performance. Although there is a common agreement that a successful fusion system should be composed of accurate and diverse classifiers, experimental results show very weak correlations between various diversity measures and combining methods. Effectively n...