一种信道估计平均长度动态调整的新方法

A New Scheme for Adjusting the Estimated Average Length of Channel

提出了利用相干Rake接收机原理,估计出有效到达径的信道估计参数及其包络信号;统计有效到达径包 络信号的电平通过率,并由此估计出信道的多普勒频偏.利用多普勒频偏与最优信道估计平均长度的关系,动态地 调整信道估计平均长度,使整个相干接收机的性能在不同的移动速度下均能获得较好的估计性能.

The author proposes that the channel coefficient of the effective arriving path can be estimated with the Rake coherent receiver. By calculating the level cross rate (LCR) of the envelope , the Doppler - shift is estimated. The observation length is then adjusted dynamically with the help of the connection between the Doppler - shift and the optimal observation length, enabling the whole receiver to obtain better performance in variant velocities.