Title :
Frequency-domain frame synchronization for optimum frequency-differential demodulation of ODFM
Author :
Muller-Weinfurtner, Stefan H.
Author_Institution :
Lab. fur Nachrichtentech., Erlangen-Nurnberg Univ., Germany
fDate :
6/21/1905 12:00:00 AM
Abstract :
A frame synchronization for orthogonal frequency-division multiplexing (OFDM) is addressed which exploits the correlation of adjacent subcarriers. A lower bound for the variance of the estimated frame start position is provided. The estimate is found to be biased according to the center of power delay gravity of the channel impulse response but this enables an optimum differential demodulation in frequency direction with respect to a minimum mean-squared error (MMSE) in the differentiated decision variables
Keywords :
OFDM modulation; correlation methods; demodulation; estimation theory; frequency-domain analysis; least mean squares methods; synchronisation; transient response; ODFM; OFDM; adjacent subcarriers; center of power delay gravity; channel impulse response; differentiated decision variables; estimated frame start position; frequency direction; frequency-domain frame synchronization; minimum mean-squared error; optimum differential demodulation; optimum frequency-differential demodulation; orthogonal frequency-division multiplexing; Asynchronous transfer mode; Delay estimation; Demodulation; Discrete Fourier transforms; Frequency estimation; Frequency synchronization; Gravity; Laboratories; OFDM modulation; World Wide Web;
Conference_Titel :
Global Telecommunications Conference, 1999. GLOBECOM '99
Conference_Location :
Rio de Janeireo
Print_ISBN :
0-7803-5796-5
DOI :
10.1109/GLOCOM.1999.830198
