SHI Yangchun, WU Longsheng, LIU Youbao. Interference Suppression Based on Wavelet Packets Transform and BP Neural Network for DSSS System[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2011,50(5):15-20.
SHI Yangchun, WU Longsheng, LIU Youbao. Interference Suppression Based on Wavelet Packets Transform and BP Neural Network for DSSS System[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2011,50(5):15-20.DOI:
a transform domain information signal identify (TISI) algorithm is proposed,based on two improved algorithms: Power distributing predominance wavelet packets transform (PDP-WPT) and extend BP neural network (EBPNN). Firstly
PDPWPT is proposed to track the interference signal effectively
improving the convergence rate of this algorithm. Secondly
the information signal can be identified from transform domain coefficients by self-adaptive EBPNN
which has simple structure and enhanced numerical robustness. Based on the math model of the TISL
the formulas for ISR suppression
SNR loss and BER are deduced. Results show that TISI can improve the ISR suppression by 43.8% and 20.8%
reduce the SNR loss by 62.5% and 348% separately compared with traditional algorithms in the condition of same interference input.