Patent ID: 7983233
Filing Date: 2011-07-19
Classification: H04L,H04W

Abstract:
1. An apparatus for a receiver section with phase noise suppression in an OFDM based WLAN operating in accordance with IEEE standard 802.11a, comprising: an RF downconverter and analog-to-digital (A/D) that processes a received OFDM signal and outputs a downconverted digital OFDM signal; a phase shifter that multiplies the downconverted digital OFDM by a phase noise signal and outputs a baseband signal OFDM signal; a serial-to-parallel converter with the baseband OFDM signal as an input and parallel streams of the baseband OFDM signal as an output; an FFT that transforms the parallel streams of the baseband OFDM signal into a frequency domain signal R an ICI plus noise estimator with an input of a null subcarrier set S a CPE estimator with an inputs of a pilot subcarrier set S a MMSE Equalizer and Data Detector with inputs of S wherein a transmitted signal symbol decision, the phase noise signal and the decision feedback signal are outputs of the MMSE Equalizer and Data Detector, and wherein said estimates are used to calculate equalizer coefficients for N samples of each transmitted symbol of the baseband OFDM signal.