Wireless LAN White Papers
Estimation of Wiener Phase Noise by the Autocorrelation of the ICI Weighting Function in OFDM Systems
Overview Performance degradation due to Wiener phase noise which causes both Common Phase Error (CPE) and Inter-Carrier Interference (ICI) is a crucial challenge to the implementation of OFDM systems. This paper theoretically employs the Lorentzian model to investigate the autocorrelation function of the ICI weighting function which is the discrete Fourier transform of the exponential phase noise process. This autocorrelation function can be shown to be the kernel of the covariance of the ICI. Based on this kernel, a pilot-aided decision-directed CPE estimator is proposed according to maximum-likelihood criterion.
| Publisher | Institute of Electrical and Electronics Engineers | File Format | |
|---|---|---|---|
| Date Published | August 2005 | ||
| Format | White Papers | ||
| Topics | |||
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