Drake, Samuel PictonAnderson, Brian D. O.Yu, Changbin (Brad)2015-12-022015-12-020003-6951http://hdl.handle.net/1885/16977In complex electromagnetic environments it can often be difficult to determine whether signals received by an antenna array emanated from the same source. The failure to appropriately assign signal reception events to the correct emission event makes accurate localisation of the signal source impossible. In this paper we show that as the received signal events must lie on the light-cone of the emission event the Cayley-Menger determinate calculated from using the light-cone geodesic distances between received signals must be zero. This result enables us to construct an algorithm for sorting received signals into groups corresponding to the same far-field emission.http://www.sherpa.ac.uk/romeo/issn/0003-6951..."Publishers version/PDF may be used on author's personal website, institutional website or institutional repository" from SHERPA/RoMEO site (as at 3/12/15). Copyright 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters and may be found at https://doi.org/10.1063/1.3180815Keywords: Cayley-Menger determinants; Electromagnetic environments; Electromagnetic signals; Geodesic distances; Received signals; Signal reception; Signal source; Field emission; Antenna arrays2009-07-2410.1063/1.31808152016-02-24