Title :
Channel estimation based on coded pilot for OFDM
Author :
H´Mimy, Hossam H.
Author_Institution :
Wireless Eng. Technol., Ericsson Inc., Richardson, TX, USA
Abstract :
The multipath fast frequency selective fading channel is estimated using coded pilot, based on DS-SS, for orthogonal frequency division multiplexing (CP-OFDM). The effect of the channel is equalized using channel inversion and channel estimation with maximum likelihood sequence estimation (CE-MLSE). The performance of unfaded coded pilot OFDM is derived for AWGN. The performance of channel inversion and CE-MLSE are simulated for multipath fast fading channels. The coded pilot estimation occurs at the same instant that the signal undergoes the fading effect which makes it suitable for fast fading channels
Keywords :
Gaussian noise; equalisers; estimation theory; fading; frequency division multiplexing; maximum likelihood estimation; multipath channels; personal communication networks; pseudonoise codes; spread spectrum communication; white noise; AWGN; CE-MLSE; DS-SS; FDM; channel equalization; channel estimation; channel inversion; coded pilot; maximum likelihood sequence estimation; multipath fast frequency selective fading channel; orthogonal frequency division multiplexing; performance; personal communications; unfaded coded pilot OFDM; Bandwidth; Channel estimation; Digital audio broadcasting; Equalizers; Fading; Frequency estimation; Frequency response; Least squares approximation; Maximum likelihood estimation; OFDM;
Conference_Titel :
Vehicular Technology Conference, 1997, IEEE 47th
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-3659-3
DOI :
10.1109/VETEC.1997.605432
