Hardware-based adaptive general parameter extension in W-CDMA power control

An adaptive general parameter (GP) extension to polynomial FIR predictors is proposed for Rayleighdistributed fading signal prediction. The GP-extended FIR predictor has been implemented on Altera’s programmable logic devices, and its performance has been simulated with varying bit widths. The hardware implementation takes advantage of the characteristic properties of programmable logic devices. This results in decreasing the required number of logic gates and in increasing the maximum sampling rate of the predictor. The proposed adaptation can be regarded as the simplest form of adaptive filtering, and is shown to yield improved filtering performance at a low computational cost. A promising application is to use the GP-extended FIR filter in predicting the received transmission power in a WCDMA mobile communications system.