Browse > Article

A Study on the performance improvement by loop interference cancellation and adaptive equalizer in OFDMA based Wibro relay station  

Lee, Chong-Hyun (Faculty of Marine Industrial Eng., College of Ocean Sciences, Cheju National University)
Lim, Seung-Gag (Dept. of Information and Telecommunication Engineering, Kongju National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.43, no.11, 2006 , pp. 141-148 More about this Journal
Abstract
This paper deals with the performance improvement by eliminating loop interference signal and inserting adaptive equalizer for phase compensation in OFDMA based Wibro relay station. The Wibro relay station is used for the extension of communication service area and for throughput improvement of base station. The loop interference is important factor of performance determination of relay station when transmitter and receiver is very closely located. In order to design interference canceller, we generated base-band OFDMA signal and then transmitted the signal along with pilot tones alined with two different combinations for training mode. And then, we generated received fading signal due to the loop interference added noise to the received signal. In the receiver, the transmitted signal is recovered by elimination of the interference signal with channel estimate and compensating phase by adaptive equalizer. The performance improvement was verified by computer simulation which show channel estimation, constellation of signal and BER characteristics according to the variation of SNR ratio.
Keywords
Interference Cancellation; OFDMA; MMR;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 강창언,'디지털통신입문', 복두출판사,1996
2 김영일,신정채외 3인,'IEEE802.16 MMR 동향', 전자통신동향분석, 제21권, 3호, pp.91-99, June 2006
3 M.Hosseinpour, M.Waeze, 'Mitigating Phase Noise effect in OFDM System Using Partial IFFT/FFT and Adaptive Filtering', The 14th Inter. symp. on Personal, Indoor and Mobile Radio Com. Proceeding, No.6, pp.540-544, May 2003   DOI
4 조용수, '무선 멀티미디어 통신을 위한 OFDM 기초', 대영사, 2000
5 차재상, 이종현외 2인,'최신 이동 통신 시스템', 도서출판 힐그린, 2005
6 N.Benvenuto, S.Tomasin, L.Tomba, 'Equalization Methods in OFDM and FMT Systems for Broadband Wireless Communications', IEEE Trans. on Com., Vol.50, No.9, pp.1413-1418, Sep, 2002   DOI   ScienceOn
7 K.Imamura, K.Shibuya, M.Sasaki, 'A Basic Study for SFN-Measurement of Coupling between Transmitting and Receiving Antenna', ITE Technical Report, Vol.22, No.34, pp.13-18, Jun. 1998
8 T.C.Hewavithana, D.M.Brookes, 'Blind Adaptive Channel Equalization for OFDM Using the Cyclic Prefix Data', IEEE Global Conf., Vol.3, pp. 2376-2380, Oct., 2004   DOI
9 T.Tang, R.W.Heath, 'Space-Time Interference Cancellation in MIMO-OFDM Systems', IEEE Trans. on V.T., Vol.54, No.5, pp.1802-1816, Sep. 2005   DOI   ScienceOn
10 A.J.Coulson,'Narrowband Interference in Pilot Symbol assisted OFDM System', IEEE Trans. on Wireless Com., pp.2277-2287, Vol.No.6, Nov., 2004   DOI   ScienceOn
11 Y. Harada, T. Kimura, K. Hayashi, 'An Implementation of OFDM Receiver for Digital Terrestrial Television Broadcasting and Its Technologies', IEEE International Broadcasting Conferenc, No.447, Sep. 1997
12 IEEE Standard 802.16-2004, 'IEEE Standards for Local and Metropolitan Area Networks Part 16 : Air Interface for Fixed Broadband Wireless Access System', Oct. 2004
13 IEEE 002.16-05/013, 'Mobile Multihop Relay Networking in IEEE 802.16', July 2005