Title :
DHT-Based Channel Estimation for MIMO-OFDM Systems
Author :
Gai, Yibing ; Li, Hongyan ; He, Zhiqiang ; Niu, Kai ; Wu, Weiling
Author_Institution :
Key Lab. of Inf. Process. & Intell. Technol., Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
Discrete Fourier transform (DFT)-based least square (LS) channel estimation with phase shifted pilots (PSP) is a practical method in multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. In this paper, a real number pilot sequence is presented to replace PSP in time-domain LS channel estimation algorithm, which can reduce computation and save memory while keeping the precision. Furthermore, using discrete Hartley transform (DHT) in LS channel estimation algorithm, a simpler estimator is derived. The simulation results demonstrate the effectiveness of the proposed pilot sequence and the DHT-based channel estimation algorithm.
Keywords :
MIMO communication; OFDM modulation; channel estimation; discrete Fourier transforms; discrete Hartley transforms; phase shift keying; DHT; MIMO-OFDM systems; discrete Fourier transform; discrete Hartley transform; least square channel estimation; multiple-input multiple-output; orthogonal frequency division multiplexing; phase shifted pilots; time-domain; Channel estimation; Discrete Fourier transforms; Fading; Least squares approximation; MIMO; OFDM; Partial transmit sequences; Receiving antennas; Time domain analysis; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference, 2008. VTC Spring 2008. IEEE
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-1644-8
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2008.191
