Title :
A narrow-band interference exciser for wideband OFDM in HF communications
Author :
Chun-rong, Kan ; Ying, Liu
Author_Institution :
Inst. of Commun. Eng., PLAUST, Nanjing, China
Abstract :
Wideband OFDM communications are easily been interfered by narrowband signal. The attenuation is worse in low SNR. Based on Nilsson´s wideband OFDM system, a relative threshold exciser for narrowband interference is design 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 compensate 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.
Keywords :
OFDM modulation; broadband networks; interference suppression; radiofrequency interference; HF communications; SNR; narrow-band interference exciser; noise interference; power estimation; relative threshold exciser; wideband OFDM; Analytical models; Attenuation; Interference; Narrowband; Noise reduction; OFDM; Performance analysis; Signal to noise ratio; Wideband; Working environment noise;
Conference_Titel :
Communications and Information Technology, 2005. ISCIT 2005. IEEE International Symposium on
Print_ISBN :
0-7803-9538-7
DOI :
10.1109/ISCIT.2005.1566880
