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Totally Blind Channel Estimation for OFDM on Fast Varying Mobile Radio Channels

Overview A new blind channel estimation scheme for OFDM-systems is proposed based on the ML-principle. By avoiding the use of second- and higher-order statistics, a very fast convergence rate is achieved. A novel approach is also proposed for resolving the phase ambiguity of the blind channel estimate without the need for any reference symbols. The approach combines different modulation schemes on adjacent subcarriers, such as 3-PSK and QPSK, to resolve phase ambiguity. Simulations were performed for mobile radio environments with high Doppler frequencies and short-to-medium delay spreads. The achieved performance is comparable to that of pilot-based channel estimation for the case of QPSK-modulation.

Further White Paper Details
Publisher	Georgia Institute of Technology	File Format	PDF
Date Published	April 2007
Format	White Papers
Topics	Wireless LAN, Mobile - Wireless Communications

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