?url_ver=Z39.88-2004&rft_id=10.1007%2F978-3-319-07674-4%E2%82%81%E2%82%88&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=A.M.&rft.aulast=Khan&rft.au=Khan%2C+A.M.&rft.date=2015&rft.issn=18761100&rft.isbn=9783319076737&rft.title=Lecture+Notes+in+Electrical+Engineering&rft.atitle=Pilot+based+pre+FFT+signal+to+noise+ratio+estimation+for+OFDM+systems+in+Rayleigh-fading+channel&rft.pages=171-182&rft.volume=315&rft.genre=article