Abstract
In this paper, the channel estimation techniques for Orthogonal Frequency Division Multiplexing (OFDM) systems based on pilot arrangement are studied and we apply Low Density Parity Check (LDPC) codes to the system of IEEE 802.16a with OFDM modulation. First investigated is the influence of channel estimation schemes on LDPC-code based OFDM system in static and multipath fading channels. According to the different propagation environments in 802.16a system, a dynamic channel estimation scheme is proposed. A good irregular LDPC code is designed with code rate of 1/2 and code length of 1200. Simulation results show that the performance of LDPC coded OFDM system proposed in this paper is better than that of the convolution Turbo coded OFDM system proposed in IEEE standard 802.16a.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
LAN MAN Standards Committee of the IEEE Computer Society, IEEE 802.16a, IEEE standard for local and metropolitan area networks, Part 16: air interface for fixed broadband wireless access systems-medium access control modifications and additional physical layer specifications for 2–11 GHz, New York, IEEE, 2003.
Thomas J. Richardson, M. Amin Shokrollahi, Rüdiger L. Urbanke. Design of capacity-approaching irregular low-density parity-check codes. IEEE Trans. on Inform. Theory, 47(2001)2, 619–637.
Sinem Coleri, Mustafa Ergen, Anuj Puri, et al. Channel estimation techniques based on pilot arrangement in OFDM systems. IEEE Trans. on Broadcasting, 48(2002)3, 223–229.
M. Hsieh, C. Wei. Channel estimation for OFDM systems based on comb-type pilot arrangement in frequency selective fading channels. IEEE Trans. on Consumer Electronics, 44(1998)1, 217–225.
Luc Deneire, Patrick Vandenameele, Liesbet van der Perre. A low-complexity ML channel estimator for OFDM. IEEE Trans. on Communications, 51(2003)2, 135–140.
V. Ereg, K. V. S. Hari, M. S. Smith, D. S. Baum, et al. Channel models for fixed wireless applications. http://ieee802.org/16, July 17, 2001.
J. Campello, D. S. Modha. Extended bit-filling and LDPC code design. Proc. IEEE Globecom Conference, San Antonio, TX, Nov. 2001, 985–989.
J. Hou, P. H. Siegel, L. B. Milstein. Performance analysis and code optimization of low density parity-check codes on Rayleigh fading channels. IEEE Trans. on Selected Areas in Communications, 19(2001)5, 924–934.
Thomas J. Richardson, Rüdiger L. Urbanke. Efficient encoding of low-density parity-check codes. IEEE Trans. on Inform. Theory, 47(2001)2, 638–656.
Jinghu Chen, Marc P. C. Fossorier. Near optimum universal belief propagation based decoding of low-density parity check codes. IEEE Trans. on Communications, 50(2002)3, 406–414.
Author information
Authors and Affiliations
Corresponding author
Additional information
Supported by Jiangsu University Natural Science Research Fund (05KJB510090), National Natural Science Foundation of China (No.60472104).
About this article
Cite this article
Zhu, Q., Li, H. & Feng, G. Performance analysis of channel estimation for LDPC-coded OFDM system in multipath fading channel. J. of Electron.(China) 23, 801–805 (2006). https://doi.org/10.1007/s11767-005-0021-1
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/s11767-005-0021-1