Research on TD-SCDMA system channel estimation of imperfect synchronization
Huang Yu · Application of Electronic Technique · 2008
In this paper, channel estimation in uplink TD-SCDMA system with imperfect synchronization is analyzed from both theory and simulations. The analysis shows that the left (or right) shift of user's arrive time will result in a circular shift of its actual channel impulse response(CIR) with corresponding direction. Simultaneously, it also will produce a fixed interference, which is similar as white Gaussian noise, which adding on the CIR of every active user in the channel. Then simulation at the end of the paper proves these conclusions, and shows that the different shift direction will cause different impact on joint detection performance.