Title :
Channel Estimation Scheme with Low Complexity Discrete Cosine Transformation in MIMO-OFDM System
Author :
Takeda, Daisuke ; Tanabe, Yasuhiko ; Sato, Kazumi
Author_Institution :
Corp. Res. & Dev. Center, Toshiba Corp., Kawasaki
Abstract :
Channel estimation is a key baseband processing task in wireless systems. Filtering or smoothing algorithms can improve the accuracy of channel estimates and the discrete cosine transformation (DCT) can be used for this purpose. By using the DCT, performance will be improved compared to the straight forward approach of per subcarrier estimation (PSE). However, the complexity of DCT is not negligible. This paper proposes a low complexity channel estimation scheme using the DCT. Simulation results show that the performance is improved by more than 1 dB compared with PSE in MIMO-OFDM system.
Keywords :
MIMO communication; OFDM modulation; channel estimation; discrete cosine transforms; MIMO-OFDM system; baseband processing task; channel estimation; discrete cosine transformation; per subcarrier estimation; Channel estimation; Discrete Fourier transforms; Discrete cosine transforms; Frequency response; MIMO; OFDM; Proposals; Smoothing methods; Transmitters; Wireless LAN;
Conference_Titel :
Vehicular Technology Conference, 2007. VTC2007-Spring. IEEE 65th
Conference_Location :
Dublin
Print_ISBN :
1-4244-0266-2
DOI :
10.1109/VETECS.2007.111
