A Channel Estimation Method for Long Code CDMA Communication Systems
Yuelei Xie · Journal of Guilin University of Electronic Technology · 2004
In the long code CDMA communication system,due to the use of time varying spread code in the multi-path,the channel estimation is more difficult,but the design of the multi-user detectors usually needs to be based on the knowledge of the channel.This paper constructed a long code CDMA communication model and a multi-path frequency-selective fading channel FIR filter model by the channel estimation of LC _ CDMA.Based on the model,this paper proposed a channel estimation algorithm by linear neural networks for noise subspace and analyzed the algorithm performance by a computer simulation.To multi-user detection,this paper also proposed a multi-user detector for long code CDMA based on the channel estimation.