User-friendly monitoring system for residential PV system based on low-cost power line communication
A photovoltaic (PV) system has been widely deployed in residential areas to reduce energy cost. However, it is not monitored in detail or managed in a user-friendly manner in many cases. Therefore, a PV monitoring system needs to provide both detailed monitoring of each PV module and a user-friendly way of access to the monitored […]
Features of the HEO satellite communication systems
This paper presents an evaluation of Doppler Shift and Doppler Rate for the communication HEO satellites. A method for Doppler shift compensation is consideredwhich allows increasing channel capacity.
Shining a Light into the Darkness: How Cooperative Relay Communication Mitigates Correlated Shadow Fading
In a cellular network, connections between the Base Station (BS) and Mobile Stations (MS) may fail when the channel is in a deep fade. Shadow fading is large-scale fading which can cause significant received power loss for a wide area. This will lead to lost connections and/or packet loss which is harmful to mobile users, […]
On the Design of a Solar-Panel Receiver for Optical Wireless Communications With Simultaneous Energy Harvesting
This paper proposes a novel design of an optical wireless communications (OWC) receiver using a solar panel as a photodetector. The proposed system is capable of simultaneous data transmission and energy harvesting. The solar panel can convert a modulated light signal into an electrical signal without any external power requirements. Furthermore, the direct current (DC) component of […]
Chaos-based BPSK communication system
A novel broadband chaos-based coherent binary phase shift keying (BPSK) communication system is proposed and it is demonstrated that its theoretical probability of error expression matches that of a conventional narrowband BPSK system. The result is confirmed with the corresponding empirical bit error rate (BER) simulation. Most importantly, it is shown that the proposed system outperforms the chaotic communication systems in terms of BER […]
Interference Impact of Wireless Avionics Intra-Communication Systems onto Aeronautical Radio Altimeters
In this paper an assessment concerning the potential impact of interference caused by transmissions of wireless avionics intra-communication systems onto aeronautical radio altimeter operating co-frequency is presented. The radio altimeter model utilized for the assessment accounts for realistic scattering and antenna characteristics to describe echo signals returned by the Earth surface. It includes a detailed description of […]
Front-end Monitoring of Multiple Loads in Wireless Power Transfer Systems Without Wireless Communication Systems
This paper describes a method for monitoring multiple loads from the front-end of a wireless power transfer system without using any wireless communication systems. A mathematical approach based on scanning the frequency around the resonant frequency has been developed for deriving the load conditions. The proposal requires only information of the input voltage and current only, therefore eliminating the […]
Admission Control Scheme for Service Dropping Performance Improvement in High-Speed Railway Communication Systems
In high-speed railway communication (HSRC) systems, ensuring the continuity of on-going services is one of the toughest challenges, for the existence of influential factors such as frequent handoff event, short time window for handoff, and severe channel distortion, etc. In HSRC systems with limited resources, admission control (AC) is one of the most efficient methods to overcome this challenge and […]
Summary of results in the field of small element antenna arrays for mobile communication systems
Development of the theory and technology of the small element antenna arrays is one of the research areas of the Department of Technical Electromagnetics and Radio communication Systems since 2006. The research is focused on the improvement of the mobile communication systems. Curvilinear antenna arrays are proposed that comprise antenna elements with controllable polarization of radiation, which are located along […]
Spectrum sharing between matrix completion based MIMO radars and a MIMO communication system
Recently proposed multiple input multiple output radars based on matrix completion (MIMO-MC) employ sparse sampling to reduce the amount of data forwarded to the radar fusion center, and as such enable savings in communication power and bandwidth. This paper proposes designs that optimize the sharing of spectrum between MIMO-MC radars and MIMO communication systems, so that the latter interferes […]
