A Real Time Power Control Method for Wireless Mobile Communications System

The conventional power control algorithm always adjust the power after the signal deteriorated, therefore, the performance degradation due to the unknown deep fading can not be avoided. To address this problem, a new real time power control method is proposed in this letter. The method is based on the image of the user´s propagation environment, which is obtained from the imaging technique of the smart antenna array. This visual cognitive way makes the deep fading known to the base station in real time, and consequently which is compensated efficiently. Using both analytical and simulation methods, we find that the proposed method achieves better performance compared with the conventional fixed step power control (FSPC) algorithm. When the signal to interference ratio (SIR) is 9dB, the bit error rate (BER) in the FSPC is 2.627 * 10^-3, whereas, the BER can be 8.051 * * 10^-5 in the proposed method.