Title :
Improving the capacity of OFDM via frequency-domain oversampling
Author :
Shi, Qinghua ; Karasawa, Y.
Author_Institution :
Dept. of Electron. Eng., Univ. of Electro-Commun., Chofu
Abstract :
A frequency-domain oversampling based scheme is proposed for OFDM systems. It is shown that a linear minimum mean-square error (MMSE) receiver with frequency oversampling can efficiently increase the capacity of OFDM. The improvement in capacity is determined by the number of multipath components of the channel. In contrast, the conventional MMSE receiver without frequency oversampling cannot exploit the multipath diversity provided by the channel.
Keywords :
OFDM modulation; channel capacity; frequency-domain analysis; least mean squares methods; sampling methods; MMSE receiver; OFDM capacity; frequency-domain oversampling; linear minimum mean square error; multipath component; multipath diversity; Fading; Frequency diversity; Frequency division multiplexing; Frequency estimation; Multiaccess communication; Multicarrier code division multiple access; Multiple access interference; OFDM; Time domain analysis; Transmitters;
Conference_Titel :
Information Theory, 2009. CWIT 2009. 11th Canadian Workshop on
Conference_Location :
Ottawa, ON
Print_ISBN :
978-1-4244-3400-8
Electronic_ISBN :
978-1-4244-3401-5
DOI :
10.1109/CWIT.2009.5069541
