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2008-07-07

Frequency Estimation by Pilot Set Partitioning for OFDM Systems with Multiple Transmit Antennas

By Eu-Suk Shim, Young-Hwan You, Kyung-Taek Lee, and Ki-Won Kwon
Progress In Electromagnetics Research M, Vol. 3, 193-204, 2008
doi:10.2528/PIERM08061201

Abstract

Cyclic delay diversity (CDD) is a simple approach to increase the frequency selectivity of the channel in an orthogonal frequency division multiplexing (OFDM) based transmission scheme. However, CDD can cause serious degradation in the performance of channel and frequency estimation in the frequency domain. This paper suggests a post-FFT frequency estimation scheme suitable for arbitrary cyclic delays in the CDD-OFDM system. By partitioning uncorrelated pilot subcarriers into subsets to be flat, and performing frequency estimation for each pilot subset, a robust integer frequency offset estimation scheme is derived.

Citation


Eu-Suk Shim, Young-Hwan You, Kyung-Taek Lee, and Ki-Won Kwon, "Frequency Estimation by Pilot Set Partitioning for OFDM Systems with Multiple Transmit Antennas," Progress In Electromagnetics Research M, Vol. 3, 193-204, 2008.
doi:10.2528/PIERM08061201
http://jpier.org/PIERM/pier.php?paper=08061201

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