Title :
Direct path and multipath cancellation with discrete distribution structure in passive radar
Author :
Ducheng Wu ; Liang Shen ; Jinquan Xie ; Cen Qian
Author_Institution :
Inst. of Commun. Eng., PLA Univ. of Sci. & Technol., Nanjing, China
Abstract :
The Direct path and multipath interference (DPI and MPI) Cancellation is a crucial issue in the passive radar. In this paper, two improvements have been done in NLMS algorithm. One is to estimate the values and distribution of DPI and MPI roughly, and then remove them from the echo signal before filtering. The other one is to vary the step size of NLMS according to the cross correlation function of the reference signal and the output signal of the adaptive filter. The performance of the improved algorithm in passive radar DPI and MPI Cancellation is reported. The computer simulation results show that the algorithm has a faster convergence rate and a smaller steady state error.
Keywords :
interference suppression; least mean squares methods; multipath channels; passive radar; adaptive filter; cross correlation function; direct path cancellation; direct path interference; discrete distribution structure; echo signal; multipath cancellation; multipath interference; output signal; passive radar; reference signal; step size; NLMS algorithm; direct path and multipath interference; distribution; passive radar; step size;
Conference_Titel :
Computer Science and Network Technology (ICCSNT), 2012 2nd International Conference on
Conference_Location :
Changchun
Print_ISBN :
978-1-4673-2963-7
DOI :
10.1109/ICCSNT.2012.6526325
