Kan Chun-rong, Wang Ting-chang. A Relative Threshold Exciser of Narrowband Interference for Wideband OFDM in HF Communications[J]. Journal of Electronics & Information Technology, 2006, 28(7): 1266-1269.
Citation:
Kan Chun-rong, Wang Ting-chang. A Relative Threshold Exciser of Narrowband Interference
for Wideband OFDM in HF Communications[J]. Journal of Electronics & Information Technology, 2006, 28(7): 1266-1269.
Kan Chun-rong, Wang Ting-chang. A Relative Threshold Exciser of Narrowband Interference for Wideband OFDM in HF Communications[J]. Journal of Electronics & Information Technology, 2006, 28(7): 1266-1269.
Citation:
Kan Chun-rong, Wang Ting-chang. A Relative Threshold Exciser of Narrowband Interference
for Wideband OFDM in HF Communications[J]. Journal of Electronics & Information Technology, 2006, 28(7): 1266-1269.
Wideband OFDM communications are easily been interfered by narrowband signal. The attenuation is worse in low SNR. Based on Nilssons wideband OFDM system, a relative threshold exciser for narrowband interference is designed here. The choice of relative threshold and the power estimation of noise are investigated under low SNR. To reduce noise interference, the method of channel compensation is modified for noisy environment. Theoretic analysis and simulations show the performance of the system with this relative threshold exciser can keep up with the ideal interference exciser in HF communications under low SNR.
Nilsson J E M.[J].Giles T C. Wideband multi-carrier transmission for military HF communication [C]. Proc. Milcom97, Monterey, U.S.A.1997,:-[2]Nilsson R, Sjoberg F, LeBlanc J P. A narrow-band interference canceller for OFDM-based systems [C]. EPMCC01, Vienna, Austria, 2001: 1.8.[3]Hsiao H F, Hsieh M H, Wei C H. Narrow-band rejection in OFDM-CDMA transmission system [C]. ISCAS '98 Monterey, USA 1998: 437.440.[4]Schmidt K U, Ertel J, Benedix M, et al.. Subcarrier exclusion techniques for coded OFDM[C]. 8th International OFDM Workshop 2003, InOWo Germany, 2003: 24.25.[5]Theodore S. Rappaport, Wireless communications principles practice[M]. Prentice-Hall, Inc. 1996: 176.185.
DownLoad: