Weitere Artikel dieser Ausgabe durch Wischen aufrufen
A fast linear minimum mean square error (LMMSE) channel estimation method has been proposed for Orthogonal Frequency Division Multiplexing (OFDM) systems. In comparison with the conventional LMMSE channel estimation, the proposed channel estimation method does not require the statistic knowledge of the channel in advance and avoids the inverse operation of a large dimension matrix by using the fast Fourier transform (FFT) operation. Therefore, the computational complexity can be reduced significantly. The normalized mean square errors (NMSEs) of the proposed method and the conventional LMMSE estimation have been derived. Numerical results show that the NMSE of the proposed method is very close to that of the conventional LMMSE method, which is also verified by computer simulation. In addition, computer simulation shows that the performance of the proposed method is almost the same with that of the conventional LMMSE method in terms of bit error rate (BER).
Weinstein SB, Ebert PM: Data transmission by frequency-division multiplexing using the discrete Fourier transform. IEEE Transactions on Communications 1971, 19(5, part 1):628-634. 10.1109/TCOM.1971.1090705 CrossRef
Hui DSW, Lau VKN, Lam WH: Cross-layer design for OFDMA wireless systems with heterogeneous delay requirements. IEEE Transactions on Wireless Communications 2007, 6(8):2872-2880. CrossRef
Coleri S, Ergen M, Puri A, Bahai A: Channel estimation techniques based on pilot arrangement in OFDM systems. IEEE Transactions on Broadcasting 2002, 48(3):223-229. 10.1109/TBC.2002.804034 CrossRef
Hsieh M-H, Wei C-H: Channel estimation for OFDM systems based on comb-type pilot arrangement in frequency selective fading channels. IEEE Transactions on Consumer Electronics 1998, 44(1):217-225. 10.1109/30.663750 CrossRef
Edfors O, Sandell M, van de Beek J-J, Wilson SK, Börjesson PO: OFDM channel estimation by singular value decomposition. IEEE Transactions on Communications 1998, 46(7):931-939. 10.1109/26.701321 CrossRef
Simeone O, Bar-Ness Y, Spagnolini U: Pilot-based channel estimation for OFDM systems by tracking the delay-subspace. IEEE Transactions on Wireless Communications 2004, 3(1):315-325. 10.1109/TWC.2003.819022 CrossRef
Zhao Y, Huang A: A novel channel estimation method for OFDM mobile communication systems based on pilot signals and transform-domain processing. Proceedings of the 47th IEEE Vehicular Technology Conference (VTC '97), May 1997, Phoenix, Ariz, USA 3: 2089-2093.
Lin J-C: Least-squares channel estimation for mobile OFDM communication on time-varying frequency-selective fading channels. IEEE Transactions on Vehicular Technology 2008, 57(6):3538-3550. CrossRef
Lin R, Petropulu AP: Linear precoding assisted blind channel estimation for OFDM systems. IEEE Transactions on Vehicular Technology 2005, 54(3):983-995. 10.1109/TVT.2005.844681 CrossRef
Cai XD, Akansu AN: A subspace method for blind channel identification in OFDM systems. Proceedings of the IEEE International Conference on Communications (ICC '00), June 2000, New Orleans, La, USA 2: 929-933. CrossRef
Doukopoulos XG, Moustakides GV: Blind adaptive channel estimation in OFDM systems. IEEE Transactions on Wireless Communications 2006, 5(7):1716-1725. CrossRef
Coleri S, Ergen M, Puri A, Bahai A: A study of channel estimation in OFDM systems. Proceedings of the 56th IEEE Vehicular Technology Conference (VTC '02), September 2002, Vancouver, Canada 2: 894-898. CrossRef
van de Beek J-J, Edfors O, Sandell M, Wilson SK, Börjesson PO: On channel estimation in OFDM systems. Proceedings of the 45th IEEE Vehicular Technology Conference (VTC '95), July 1995, Chicago, Ill, USA 2: 815-819.
Li Y, Cimini LJ Jr., Sollenberger NR: Robust channel estimation for OFDM systems with rapid dispersive fading channels. IEEE Transactions on Communications 1998, 46(7):902-915. 10.1109/26.701317 CrossRef
Morelli M, Mengali U: A comparison of pilot-aided channel estimation methods for OFDM systems. IEEE Transactions on Signal Processing 2001, 49(12):3065-3073. 10.1109/78.969514 CrossRef
Kuo C, Chang J-F: Equalization and channel estimation for OFDM systems in time-varying multipath channels. Proceedings of the 15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC '04), September 2004, Barcelona, Spain 1: 474-478.
Song W-G, Lim J-T: Channel estimation and signal detection for MIMO-OFDM with time varying channels. IEEE Communications Letters 2006, 10(7):540-542.
Fernández-Getino García MJ, Páez-Borrallo JM, Zazo S: DFT-based channel estimation in 2D-pilot-symbol-aided OFDM wireless systems. Proceedings of the 53rd IEEE Vehicular Technology Conference (VTC '01), May 2001, Rhodes, Greece 2: 810-814. CrossRef
Minn H, Bhargava VK: An investigation into time-domain approach for OFDM channel estimation. IEEE Transactions on Broadcasting 2000, 46(4):240-248. 10.1109/11.898744 CrossRef
Haykin S: Adaptive Filter Theory. 4th edition. Publishing House of Electronics Industry, Beijing, China; 2002. MATH
Failli M: Digital land mobile radio communications—COST 207. Commission of the European Communities, Brussels, Belgium; September 1988.
Rappaport TS: Wireless Communications Principles and Practice. Publishing House of Electronics Industry, Beijing, China; 2002. MATH
- A Fast LMMSE Channel Estimation Method for OFDM Systems
Wong Hing Lam
- Springer International Publishing
- EURASIP Journal on Wireless Communications and Networking
Elektronische ISSN: 1687-1499
Neuer Inhalt/© ITandMEDIA, Product Lifecycle Management/© Eisenhans | vege | Fotolia