公开(公告)号：AT456235T

公开(公告)日：2010-02-15

申请号：AT06751671

申请日：2006-04-26

Applicant: QUALCOMM INC

Inventor： JAYARAMAN SRIKANT ,  XU HAO ,  NAMGOONG JUNE ,  MANGAN MICHAEL ,  BLACK PETER

IPC: H04L27/26 ,  H04L1/20 ,  H04L5/00

Abstract: A spread-spectrum communication system provides an effective signal-to-noise ratio (SNR) of received orthogonal frequency division multiplex (OFDM) slots in the presence of timing errors. Effective SNR can serve as a diagnostic tool for determining whether there was a timing error when a measured packet error rate (PER) remains high, and a predicted PER from the effective SNR remains low. A loop can use the effective SNR to control a time reference used by an OFDM decoder.