Research Article
Iterative DS-CDMA Anti-interference Technique Based on Interference Power Cognition
@INPROCEEDINGS{10.1007/978-3-642-30493-4_13, author={Taofu Mo and Zhanghong Hao and Youxi Tang}, title={Iterative DS-CDMA Anti-interference Technique Based on Interference Power Cognition}, proceedings={Wireless Internet. 6th International ICST Conference, WICON 2011, Xi’an, China, October 19-21, 2011, Revised Selected Papers}, proceedings_a={WICON}, year={2012}, month={10}, keywords={Spread spectrum signal Iterative detection Desired signal interference cancellation}, doi={10.1007/978-3-642-30493-4_13} }- Taofu Mo
Zhanghong Hao
Youxi Tang
Year: 2012
Iterative DS-CDMA Anti-interference Technique Based on Interference Power Cognition
WICON
Springer
DOI: 10.1007/978-3-642-30493-4_13
Abstract
In the additive white Gaussian noise channel, an iterative anti-interference method based on interference power cognition is proposed, where the interference is broadband digital modulation signal and desired signal is direct sequence spread spectrum(SS) signal. The power ratio of SS signal and interference is detected by cognitive method, and threshold value is calculated meanwhile. After that, the order of iteration is chose based on power ratio and threshold, if the ratio is bigger than threshold, the SS signal is detected first, or vice versa. Result shows the BER performance is improved by using proposed method, the performance is improved from 4e-3 to 1e-4 by using the proposed method, when the spread gain is 63, the SNR is -5dB, and the SIR is -12dB.
