摘要
在Mobile WiMAX OFDMA系统下,研究了线性插值、二阶多项式插值和三次样条插值等几种经典的内插拟合的信道估计方法,仿真发现它们不能很好地支持高速移动性,基于分段线性插值算法提出了一种改进方法。在ITUVA60和Va120信道环境下,对这几种内插算法的误比特率和均方误差性能进行了仿真。仿真结果证明,在高速移动环境下,提出的改进方法要比其他几种算法的性能要好。
In this paper,we study channel estimation methods with various curve fitting techniques including linear interpolation,second polynomial interpolation and spline cubic interpolation for Mobile WiMAX OFDMA system and find that they cannot support high mobility adequately.We propose an improved channel estimation method,which is based on piecewise linear estimation.Under ITU VA60 and VA120 channel circumstance,the performance of bit error rate and mean squared error is compared and we find that the proposed method has better performance than others at higher speeds.
出处
《无线电工程》
2009年第7期20-22,共3页
Radio Engineering
