A New Study of Channel Estimation Methods for OFDM in DVB-T2

Ahmed H.Eldeib, Mona Z.Salehb, Salwa Elramly

Abstract


In this paper three proposed methods of channel estimation are introduced. These methods are based on pilot-aided OFDM system with the arrangement employed in the DVB-T2 standard in time-varying frequency-selective fading channels. The first and second methods (low complexity and improved low complexity methods, respectively) are modified methods based on Domain Transform Least Square Estimation (DTLSE) method; which reduce the computational complexity by avoiding the use of the matrix inversion. The estimation matrix size for obtaining Channel Impulse Response (CIR) depends only on the length of the channel rather than the number of pilot sub-carriers or the size of OFDM symbols. The third method (high performance method), which is based on the first proposed method and a Two Dimensional Linear Interpolation 2-DIL method, uses one frame instead of one symbol and offers lesser complexity than the MMSE method, and a BER performance close to it.


Keywords


Digital Video Broadcasting System for Terrestrial Second Generation (DVB-T2); DomainTransform Least Square Estimation (DTLSE); Two Dimensional Linear Interpolation (2-DLI); Minimum Mean Square Estimation (MMSE).

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References


R. Prasad, 2004. OFDM for Wireless Communications Systems, Singapore, Artech House

Yong Soo Cho, Jaekwon Kim, Won Young Yang, Chung-GuKang,MIMO-OFDM wireless communications with MATLAB, John Wiley & Sons (Asia) Pte Ltd., 2010.

DVB Document A133, February, 2012. Implementation guidelines for a second generation Digital terrestrial television broadcasting system (DVB-T2).

Sinem Coleri, Mustafa Ergen, Anuj Puri, and Ahmad Bahai, Channel Estimation Techniques Based on Pilot Arrangement in OFDM Systems, IEEE Transactions on broadcasting, September 2002, Vol. 48, NO. 3.

Zijun Zhao and Xiang Cheng, Miaowen Wen and Bingli Jiao, Cheng-Xiang Wang "Channel Estimation Schemes for IEEE 802.11p Standard" IEEE Intelligent transportation systems magazine, Vol.5, Issue. 4, pp. 38-49, Oct. 2013.

Yulin Wang, Gengxin Zhang, Zhidong Xie, and Jing Hu "Channel Estimation in DCT-Based OFDM" Scientific World Journal, Vol. 2014.

M. Speth, S. Fechtel, G. Fock, and H. Meyr, Optimum receiver design for OFDM-based broadband transmissionPart II: A case study, IEEE Trans. Commun., Apr. 2001, Vol. 49, no. 4, pp. 571578.

M. Z. Saleh, M. Sadek and S. El Ramly, Modified MIMO-OFDM Channel Estimation Technique for DVB-T2 Systems, " Proc. The 2014 6th International Conference on Computational Intelligence and Communication Networks (CICN14), Bhopal, India, 2014.

J. Lin, Least-squares channel estimation for mobile OFDM communication on time-varying frequency-selective fading channels, IEEE Trans. Veh. Technol., vol. 57, no. 6, pp. 35383550, Nov. 2008.

Mingchao Yu and Parastoo Sadeghi,'' Study of Pilot-Assisted OFDM Channel Estimation Methods with Improvements for DVB-T2,'' IEEE Trans. Vehicular Technology, June 2012, Vol. 61, No. 5.

O. Edfors, M. Sandell, J.-J. Van de Beek, S. Wilson, and P. Borjesson, OFDM channel estimation by singular value decomposition, IEEE Trans. Commun., Jul. 1998, Vol. 46, No. 7, pp. 931939.

D. C. Chang, Effect and compensation of symbol timing offset in OFDM systems with channel interpolation, IEEE Trans. Broadcast., Dec. 2008, Vol. 54, no. 4, pp. 761-770.

J. Park, J. Kim, M. Park, K. Ko, C. Kang, and D. Hong, Performance analysis of channel estimation for OFDM systems with residual timing offset, IEEE Trans. Wireless Commun., July 2006,Vol. 5, no. 7, pp. 1622-1625.

Y.S. Lee, H.N. Kim, S. I. Park, and S. I. Lee, Noise reduction for channel estimation based on pilot-block averaging in DVB-T receivers, IEEE Trans. Consumer Electron., Feb. 2006, Vol. 52, no. 1, pp. 51-58.

P. C. Hansen, Rank-Deficient and Discrete Ill-Posed Problems. Philadelphia, PA: SIAM, 1998.

Ahmed H. Eldieb, Mona Z. Saleh and Salwa Elramly," A Comparative Study of Channel Estimation Techniques for OFDM in DVB-T2," IJCA (0975 8887), April 2014, Volume 91 No.14.

Meng-Han Hsieh, Che-Ho Wei, "Channel Estimation For OFDM Systems Based On Comb-Type Pilot Arrangement In Frequency Selective Fading Channels", IEEE Transactions on Consumer Electronics, Feb 1998, Vol. 44 , No. 1, pp. 217-225.

Ahmed H. Eldieb, Mona Z. Saleh and Salwa Elramly," An Improved Technique of Channel Estimation for OFDM in DVB-T2," IJCA (0975 8887), June 2014, Volume 96 No.16.

T. H. Cormen, C. E. Leiserson, R. L. Rivest, and C. Stein, Introduction to Algorithms. Cambridge, MA: MIT Press, 2001.

DVB Document A133 Implementation guidelines for a second generation digital terrestrial television broadcasting system (DVB-T2), Jun. 2010.

J. G. Proakis, Digital Communications. Singapore: McGraw-Hill, 1995.

Mackenzie, ABERT, SET, General description of laboratory tests, DTV Field Test Report in Brazil, July 2000.


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