一种新的基于快速功控的多普勒估计

A new Doppler estimator based on fast power-control

针对采用快速功控的移动通信系统提出了一种简便的多普勒估计方法。该方法利用功控后的接收信号电平的平稳性与最大多普勒频移有密切关系这一特点,通过测量接收信号电平的平稳性估计多普勒频移。文中在单径瑞利衰落信道条件下对这一方法进行了仿真验证,并同文献中提出的COV方法进行了比较,仿真结果表明在信道变化不是太快时本方案有较好的估计精度。

A new simple Doppler estimator for mobile communication systems with fast power-control is proposed. Based on the fact that the faster channel variation leads to greater received power fluctuation,the scheme estimates the Doppler shift by measuring the fluctuation of the received signal power. The performance of the new scheme is simulated under single path Rayleigh fading channels and is compared with COV estimator. The results indicate that the new estimator has an acceptable estimation accuracy when the channel variation is not too fast.