Title :
Optimum channel estimation pilot design for CDD-OFDM with application to DVB
Author :
Lu, Sili ; Al-Dhahir, Naofal
Author_Institution :
Univ. of Texas at Dallas, Dallas, TX
Abstract :
Cyclic delay diversity (CDD) is a low-complexity standard-conformable transmit diversity technique for coded orthogonal frequency division multiplexing (OFDM) systems. However, it makes channel estimation more challenging due to the increased frequency-selectivity of the channel. In this paper, we propose a novel pilot-aided channel estimation scheme for CDD-OFDM. By alternating and optimizing the cyclic delay parameter for adjacent OFDM symbols, we design a simple yet efficient channel estimation scheme for frequency-selective channels and evaluate its effectiveness for a DVB-T system.
Keywords :
OFDM modulation; channel estimation; digital video broadcasting; diversity reception; modulation coding; CDD-OFDM; DVB-T system; coded orthogonal frequency division multiplexing; cyclic delay diversity; frequency-selective channels; optimum channel estimation pilot design; standard-conformable transmit diversity technique; Channel estimation; Delay estimation; Digital video broadcasting; Forward error correction; Frequency diversity; Frequency estimation; Frequency response; OFDM; Time domain analysis; Transmitting antennas; CDD; MISO; OFDM; SISO; channel estimation;
Conference_Titel :
Information Sciences and Systems, 2008. CISS 2008. 42nd Annual Conference on
Conference_Location :
Princeton, NJ
Print_ISBN :
978-1-4244-2246-3
Electronic_ISBN :
978-1-4244-2247-0
DOI :
10.1109/CISS.2008.4558501
