Channel Estimation of Chirp Spread Spectrum System Based on Modified Forth-Order Cumulant TLS-ESPRIT Algorithm
Yongning Zhuo · Communications technology · 2010
A forth-order cumulant TLS-ESPRIT algorithm based on fast pseudospectral modification is proposed in this paper.This algorithm adequately uses data information of the forth-order cumulant matrix,could not only estimate the multipath time delay accurately,but also identify and eliminate the fake multipath effectively.Thus the estimation of multipath amplitude based on the estimation of multipath time delay becomes more reliable.For the setting-up of key parameters in simulation design and engineering application,this paper lists the three relations which these parameters should obey.Finally,both a simulation on the algorithm in the propagation circumstance of IEEE802.15.4a channel and a comparison with forth-order cumulant TLS-ESPRIT algorithm and pseudospectral search algorithm are done.