category e1 Full written paper- Refereed Proceedings pt.29/9/09;SubmitSchool: Centre for Telecommunications and Micro-Electronics  pt.30/9/09 BG, Related URLs in second box was added by someone. Not sure if it relevant. 6/1/10 HD; added DOI pt.9/8/11.  PERMISSION: '"We grant to authors of papers published in an SPIE Journal or Proceedings the right to post an author-prepared 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; 
Copyright notice format:
Copyright XXXX (year) Society of Photo‑Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
and (c) a link to SPIE’s official online version of the abstract is provided using the DOI (Document Object Identifier) link. Note: The DOI can be found on the title page or the online abstract page of any article published by SPIE.". 21.9.12-MMM