Channel Estimation for Inverse Power Control in Wireless Communication Networks

Inverse power control can be used in several applications. However, it has a severe problem in the original design. That is, the receiver has to estimate channel parameters only using receive signal and original transmission data signal. But the transmitter has an adjustable power control gain located between the original transmission data signal and the channel gain. The power control gain affects the estimation result. Previous studies use two adaptive filters. One is at the receiver and the other at the transmitter. In this study, an adaptive channel estimation algorithm is proposed for inverse power control. There is only one adaptive filter in the overall power control system. Through this method, the convergent rate of the overall power control system can be improved. Meanwhile, the channel model in previous studies is restricted to time-invariance. In this paper, we focus on the time-varying channel. Numerical simulation is provided to compare the performance of the algorithm with existing methods.