Channel estimation and equalization using backpropagation neural networks in OFDM systems

Orthogonal frequency-division multiplexing (OFDM) systems are used to improve communication quality and capacity. This paper proposes using backpropagation neural networks (BPNNs) for channel estimation and equalization for OFDM systems. Simulation results show that the BER performance of the BPNN technique is better than other considered technique.

[1]  Vinod Subramaniam,et al.  Digital video broadcasting (DVB); framing structure, channel coding and modulation for digital terr , 2001 .

[2]  Sumit Roy,et al.  Subspace based blind channel estimation for OFDM by exploiting virtual carrier , 2001, GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270).

[3]  Framing structure , channel coding and modulation for digital terrestrial television , 2022 .

[4]  J. Tellado,et al.  A fourth-generation MIMO-OFDM broadband wireless system: design, performance, and field trial results , 2002, IEEE Commun. Mag..

[5]  Geoffrey Ye Li,et al.  Simplified channel estimation for OFDM systems with multiple transmit antennas , 2002, IEEE Trans. Wirel. Commun..

[6]  John R. Barry,et al.  Blind iterative channel identification and equalization , 2001, ICC 2001. IEEE International Conference on Communications. Conference Record (Cat. No.01CH37240).

[7]  W. W. Lu,et al.  Fourth-generation mobile initiatives and technologies [Guest Editorial] , 2002, IEEE Commun. Mag..

[8]  Andreas Spanias,et al.  On the performance of optimal training-based OFDM with channel estimation error , 2004, IEEE Global Telecommunications Conference, 2004. GLOBECOM '04..

[9]  Sumit Roy,et al.  Subspace-based blind channel estimation for OFDM by exploiting virtual carriers , 2003, IEEE Trans. Wirel. Commun..

[10]  Seung Young Park,et al.  Iterative receiver with joint detection and channel estimation for OFDM system with multiple receiver antennas in mobile radio channels , 2001, GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270).

[11]  Yongzhe Xie,et al.  An EM-based channel estimation algorithm for OFDM with transmitter diversity , 2001, GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270).

[12]  Behrouz Farhang-Boroujeny,et al.  Added pilot semi-blind channel estimation scheme for OFDM in fading channels , 2001, GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270).

[13]  Jonathan H. Manton,et al.  Optimal training sequences and pilot tones for OFDM systems , 2001, IEEE Communications Letters.

[14]  K. Fazel,et al.  Multi-Carrier and Spread Spectrum Systems: Fazel/Spread Spectrum , 2004 .

[15]  Jacques de Villiers,et al.  Backpropagation neural nets with one and two hidden layers , 1993, IEEE Trans. Neural Networks.

[16]  R. Berezdivin,et al.  Next-generation wireless communications concepts and technologies , 2002, IEEE Commun. Mag..

[17]  Khaled Fazel,et al.  Multi-Carrier and Spread Spectrum Systems , 2003 .

[18]  Burton R. Saltzberg,et al.  Multi-Carrier Digital Communications: Theory and Applications of Ofdm , 1999 .

[19]  S. Tekinay,et al.  Next-generation broadband wireless networks and navigation services [Guest Editorial] , 2002 .