Method for phase noise suppression for OFDM based WLANs
AssigneeNew Jersey Institute of Technology
InventorsYeheskel Bar-Ness, Songping Wu
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Abstract
Orthogonal frequency division multiplexing (OFDM) has been specified by IEEE 802.11a standard as the transmission technique for high-rate wireless local area networks (WLANs). Performance of an OFDM system, however, is heavily degraded by random Wiener phase noise, which causes both common phase error (CPE) and inter-carrier interference (ICI). A method and algorithm is disclosed for efficiently eliminating the effect of phase noise in OFDM based WLANs.
Claims6
A method for phase noise suppression in a receiver section of an OFDM based WLAN operating in accordance with IEEE standard 802.11a, comprising:
- estimating ICI plus noise from the null subcarrier set SN extracted from the OFDM signal, and estimating CPE from the pilot subcarrier set SP extracted from the OFDM signal;
- and
- applying the said estimates in MMSE equalization and data detection of the data subcarrier set SD.
A method wherein all transmitted symbols are subjected to said method.
Dependencies are inferred from the claim text.