Channel estimation using the parallel pilot channel in cdma2000 systems was investigated.The fractal theory was applied to describe multipath fading channels

and a novel channel estimation scheme using fractal filter in the sense of minimum mean square error (MMSE) was presented.It is demonstrated by computer simulations that the proposed method can estimate the channel parameters more accurately and track the changes of channel conditions self-adaptively in both rapid and slow terminal moving cases.The performance of the Rake receiver is improved notably.The results also show that the fractal model can describe multipath fading more effectively compared to the conventional statistical models.