Browse > Article
http://dx.doi.org/10.7840/KICS.2012.37A.3.179

Adaptive Decision Feedback Equalizer Based on LDPC Code for the Phase Noise Suppression and Performance Improvement  

Kim, Do-Hoon (충북대학교 전자정보대학 전자공학과)
Ryu, Heung-Gyoon (충북대학교 전자정보대학 전자공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37, no.3A, 2012 , pp. 179-187 More about this Journal
Abstract
In this paper, we propose an adaptive DFE (Decision Feedback Equalizer) based on LDPC (Low Density Parity Check) code for phase noise suppression and performance improvement. The proposed equalizer in this paper is applied for wireless repeater system. So as to meet ever increasing requirements on higher wireless access data rate and better quality of service (QoS), the wireless repeater system has been studied. The echo channel and RF impairments such as phase noise produce performance degradation. In order to remove echo channel and phase noise, we suggest a novel adaptive DFE equalizer based on LDPC code. The proposed equalizer helps to compensate RF impairments and improve the performance significantly better than used independently. In addition, proposed equalizer has less iteration number of LDPC code. So, the proposed equalizer system has low complexity.
Keywords
LDPC code; Decision feedback equalizer; Phase noise; Echo channel;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Haeseong Jeong and Heung-Gyoon Ryu "Phase Analysis and Performance Evaluation of Wireless ICS Repeater based on OFDM System," Proceeding of the 11th International Conference on Computer, Communication Systems (ICCCS), Nov, 2010
2 Yunmin Zhu and X. Rong Li, "Recursive Least Squares with Linear Constraints", COMMUNICATIONS IN INFORMATION AND SYSTEMS, Vol. 7, No. 3, pp. 287-312, 2007.   DOI
3 D. J. Mackay, "Good error correcting codes based on very sparse matrix," IEEE Trans. Inform. Theory, vol. 33, no. 6, pp. 399-431, Mar 1999.
4 H. G. Ryu, H. S. Lee.(2002), "Analysis and minimization of phase noise the digital hybrid PLL frequency synthesizer," IEEE Transactions Consumer Electronics, vol.48, no.2, pp. 304-312.   DOI   ScienceOn
5 J. Chen, A. Dholakia, E. Eleftheriou, M. P. C Fossorier, and X. Hu, "Reduced-complexity decoding of LDPC codes," IEEE. Trans. Commun., vol. 53, pp. 1288-1299, Aug. 2005.   DOI   ScienceOn
6 S. Papaharalabos, P. Sweeney, B. G. Evans, P. T. Mathiopoulos, G. Albertazzi, A. Vanelli-Coralli, and G. E. Corazza, "Modified sum-product algorithm for decoding low-density parity check codes," IET. Commun., vol. 1, pp. 294-300, Jun 1955.
7 Glolami, M. R., Nader-Esfahani, S., Eftekhar, A. A.(2003), "A new method of phase noise compensation in OFDM," IEEE International Conference on Communications, vol. 5, pp. 3443-3446, 2003
8 T. Pollet, M van Bladel, M. Moeneclaey.(1995), "BER sensitivity of OFDM systems to carrier freuency offset and Wiener phase noise," IEEE Trans. on Comm., vol. 43, no. 2, pp. 887-895.   DOI   ScienceOn
9 P. H. Moose(1994), "A technique for OFDM Frequency Offset Correction," IEEE Trans. on Comm., vol. 42, no. 10, pp. 2908-2914.   DOI   ScienceOn
10 Songping Wu, Bar-Ness. Y.(2002), "A phase noise suppression algorithm for OFDM-based WLANs," IEEE Communications Letters, vol. 6, pp. 535-537.   DOI   ScienceOn
11 H. G. Ryu, Y. S. Li.(2003), "Phase noise analysis of the OFDM communication system by the standard frequency deviation." IEEE Transactions on Consumer Electronics, vol. 49, no. 1, pp 41-47.   DOI   ScienceOn
12 S. B. Ryu, J. Kim and H. G. Ryu, Y. Li, "PNS Algorithm for the SC-FDMA Communication System with Phase Noise", Wireless and Optical Communications Networks, 2009 IFIP International Conference, April 2009.
13 T. Yoo, D. Woo, J. Kim, S. Ha, J. Van, and J. Lee, "Wireless repeating interference cancellation using signed-DLMS adaptive algorithm," The Institute of Electronics Engineers of Korea, Conference&Workshop, vol.30, issue1, July 2007.
14 S. J. Kim, J. Y. Lee, J. C. Lee, J. H. Kim, B. Lee, and N. Y. Kim, "Adaptive feedback interference cancellation system (AF-ICS)," IEEE Microwave Symposium (MTT-S) Digest, pp.627-630, 2003.
15 J. Lee, S. Park, H. Choi, Y. Jeong and J. Yun, "A design of co-channel feedback interference cancellation system using analog control," Microwave Conf., 36th European, Sep. 2006.
16 W. Moon, S. Im, and C. Kim, "Adaptive feedback interference cancellation using correlation for WCDMA wireless repeaters," The Institute of Electronics Engineers of Korea, Journal, vol.44, issue7, July 2007.
17 D. Choi and H. Yun, "Interference cancellation repeater," PCT Patent WO 2007/078032A1, July 12, 2007.
18 Donald Duttweiler, "Proportionate Normalized Least-Mean-Square Adaptive Echo Canceller," IEEE Transaction on Speech and Audio Processing, Vol.8, No.5, September 2000.
19 Akihiko Sugiyama, Hiroshi Sato, Akihiro Hirano and Shigeji Ikeda "A Fast Algorithm for Adaptive FIR Under Computational Constraint for Adaptive Tap-Position Control," IEEE Transaction on Circuits and System, Analog and Digital Signal Processing, Vol.43, No.9, September1996.
20 R. G. Gallager, "Low Density Parity Check codes," IRT Trans. Inform. Theory, vol. IT-8, pp. 21-28, Jan. 1962
21 D. J. Mackay and R. M. Neal, "Neal Shannon limit performance of low density parity check codes," Electronic letters, vol. 45, pp. 457-458, Mar 1997.