category e1 Full written paper- Refereed Proceedings pt.29/9/09;SubmitSchool: Centre for Telecommunications and Micro-Electronics pt.30/9/09, 22.12.09-MMM; no link to full text available pa.12/9/11. PERMISSION: 'Seeking permission in perpetuity, publisher version. “Web posting policy for papers published in SPIE Journals and Proceedings SPIE grants to authors of papers published in an SPIE Journal or Proceedings the right to post an author-prepared version or an official version (preferred version) of the published paper on an internal or external server controlled exclusively by the author/employer, provided that (a) such posting is noncommercial in nature and the paper is made available to users without charge; (b) an appropriate copyright notice and full citation appear with the paper, and (c) a link to SPIE's official online version of the abstract is provided using the DOI (Document Object Identifier) link.”. 21.9.12-MMM