Title :
On Optimum Pilot Design for Comb-Type OFDM Transmission over Doubly-Selective Channels
Author :
Islam, K. M Zahidul ; Al-Naffouri, Tareq Y. ; Al-Dhahir, Naofal
Author_Institution :
Dept. of Electr. Eng., Univ. of Texas at Dallas, Richardson, TX, USA
fDate :
4/1/2011 12:00:00 AM
Abstract :
We consider comb-type OFDM transmission over doubly-selective channels. Given a fixed number and total power of the pilot subcarriers, we show that the MMSE-optimum pilot design consists of identical equally-spaced clusters where each cluster is zero-correlation-zone sequence.
Keywords :
OFDM modulation; least mean squares methods; optimisation; MMSE-optimum pilot design; comb-type OFDM transmission; doubly-selective channels; equally-spaced clusters; fixed number; pilot subcarriers; zero-correlation-zone sequence; Channel estimation; Doppler effect; Frequency domain analysis; OFDM; Optimization; Periodic structures; Time domain analysis; Doppler; ICI; OFDM; Pilot optimization; ZCZ sequence;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2011.020411.100151
