Title :
Double-directional information azimuth spectrum and relay network tomography for a decentralized wireless relay network
Author :
Chen, Yifan ; Yuen, Chau ; Chew, Yong Huat
Author_Institution :
Newcastle Univ., Newcastle upon Tyne, UK
Abstract :
A novel channel representation for a two-hop decentralized wireless relay network (DWRN) is proposed, where the relays operate in a completely distributive fashion. The modeling paradigm applies an analogous approach to the description method for a double-directional multipath propagation channel, and takes into account the finite system spatial resolution and the extended relay listening/transmitting time. Specifically, the double-directional information azimuth spectrum (IAS) is formulated to provide a compact representation of information flows in a DWRN. The proposed channel representation is then analyzed from a geometrically-based statistical modeling perspective. Finally, we look into the problem of relay network tomography (RNT), which solves an inverse problem to infer the internal structure of a DWRN by using the instantaneous double-directional IAS recorded at multiple measuring nodes exterior to the relay region.
Keywords :
inverse problems; multipath channels; multivariable systems; radio networks; radio spectrum management; relays; statistical analysis; tomography; wireless channels; DWRN; RNT; channel representation; double-directional IAS; double-directional information azimuth spectrum; double-directional multipath propagation channel; finite system spatial resolution; geometrically-based statistical modeling; information flow; inverse problem; relay network tomography; two-hop decentralized wireless relay network; Ad hoc networks; Inverse problems; Joints; Relays; Signal to noise ratio; Tomography; Wireless communication; Wireless relay networks; cooperative communications; decentralized relays; information azimuth spectrum; information flows; relay network tomography;
Conference_Titel :
Information Theory and its Applications (ISITA), 2010 International Symposium on
Conference_Location :
Taichung
Print_ISBN :
978-1-4244-6016-8
Electronic_ISBN :
978-1-4244-6017-5
DOI :
10.1109/ISITA.2010.5649651