Title :
LS Codes Aided Channel Estimation for MIMO-OFDM Systems in Multipath Environment
Author :
Kim, Wonsop ; Chung, Hyun Kyu ; Lee, Kwang Chun ; Jeon, Hyoungsuk ; Cha, Jongsub ; Lee, Hyuckjae
Author_Institution :
Mobile Telecommun. Res. Lab., Electron. & Telecommun. Res. Inst., Daejeon
Abstract :
MIMO-OFDM system is one of the promising schemes for achieving high data rate in communication systems. In this paper, channel estimation techniques based on loosely synchronous (LS) codes are proposed for MIMO-OFDM systems. Since LS codes have perfect auto-correlation and cross-correlation functions within certain vicinity of the zero shifts, multiple antenna and multipath signal interference can be reduced substantially. Through simulations, it is shown that the proposed methods outperform both of least square and linear minimum mean square error (LMMSE) estimators.
Keywords :
MIMO communication; OFDM modulation; channel estimation; codes; error analysis; interference (signal); least mean squares methods; multifrequency antennas; multipath channels; LS codes; MIMO-OFDM system; autocorrelation function; channel estimation; cross-correlation function; least square estimators; linear minimum mean square error estimator; loosely synchronous codes; multipath environment; multipath signal interference; multiple antenna; Autocorrelation; Channel estimation; Interference; Least squares approximation; MIMO; Mean square error methods; Mobile communication; OFDM; Receiving antennas; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC-2006 Fall. 2006 IEEE 64th
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0062-7
Electronic_ISBN :
1-4244-0063-5
DOI :
10.1109/VTCF.2006.185
