Approach to blind estimation of PN sequence for DSSS signal based on blind identification and blind equalization
基于盲辨识和盲均衡的直扩信号伪码估计方法

In order to solve the problem of blindly estimation of pseudo random PN sequence for direct sequence spread spectrum DSSS signal in multipath channel, on the basis of equivalent combined impulse response of the channel model, this paper proposed a blind estimation algorithm combined blind channel identification and data-reusing blind equalization. This method estimated the equivalent combined impulse response of the channel using blind identification, it estimated the PN sequence using data-reusing blind equalization. Theoretical analysis and simulation results prove that the proposed algorithm can realize accurate blind estimation of PN sequence in multipath channel and low SNR, and show extensive adaptability to a variety of PN sequence including m sequence, Gold sequence and M sequence.