Ultra wideband antenna diversity characterisation for off‐body communications in an indoor environment. Issue 14 (1st November 2014)

• Record Type: Journal Article
• Authors: Abbasi, Qammer Hussain; Rehman, Masood Ur; Chattha, Hassan Tariq; Qaraqe, Khalid; Alomainy, Akram; Hao, Yang; Parini, Clive
• Is Part Of: IET microwaves, antennas & propagation. Volume 8:Issue 14(2014)
• Page Start: 1161
• Page End: 1169
• Publication Date: 2014-11-01
• Subjects: ultra wideband antennas -- ultra wideband communication -- diversity reception -- indoor radio -- radio receivers -- radio transmitters -- wireless channels; ultra wideband antenna diversity characterisation -- off‐body communication -- indoor environment -- spatial diversity -- UWB off‐body channel -- diversity gain -- indoor locations -- diversity branch antenna -- mutual coupling -- correlation -- power imbalance -- off‐body transmitter -- on‐body diversity receiver -- off‐body diversity -- uplink diversity -- downlink diversity -- body centric communication; Microwaves -- Periodicals; Microwave antennas -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Microwave communication systems -- Periodicals; 621.381305
• DOI: 10.1049/iet-map.2013.0370
• Languages: English
• ISSNs: 1751-8725

Abstract

Abstract : In this study, spatial diversity is experimentally investigated for ultra wideband (UWB) off‐body channels. Diveristy gain (DG) is calculated for various off‐ to on‐body channels in different indoor locations and the impact of variation of inter‐spacing between diversity branch antennas on mutual coupling, correlation and power imbalance is discussed. Effect on DG with respect to small variations of antenna on the body and DG behaviour with change of orientation between off‐body transmitter and on‐body diversity receiver are discussed. Also subject specific off‐body diversity, uplink and downlink diversity are explored in this study. Result demonstrates that neither orientation nor subject changes or small variations in antenna position will affect the diversity performance severely. Comparison of off‐body diversity shows an improvement of 50% with respect to on‐body case; hence dominates the usefulness of UWB off‐body diversity case in body‐centric communications.