An Improved Channel Estimation Method of TD-SCDMA System

B.Steiner channel estimation algorithm is commonly used in TD-SCDMA system, The algorithm is simple. However, due to the impact of background noise Makes the channel impulse response of the amplitude and delay relative to the true value have the error, reducing the system performance. Based on the B.Steiner channel estimation algorithm a channel estimation algorithm for using threshold value processing the channel impulse response has been proposed. The algorithm can effectively reduce the doppler frequency shift and noise. This article discusses the channel estimation based training sequence In the TD-SCDMA system. The mathematical model of the channel estimation is given, And describes the composition of the training sequence, the simulation model of the Channel estimation is given. using joint detection technology to simulation the channel estimation method. Experimental results showed that, based on training sequence channel estimation algorithm is close to the true value, Can significantly improve system performance. And reached the standard call.