移动通信中适用于高车速环境的精确Doppler频移与信噪比联合估计算法
发布时间：2019-01-20 09:50
【摘要】：车载移动通信中信噪比与Doppler频移对通信质量有重要影响.本文探究了基于迭代自相关函数的Doppler频移估计算法,指出其在高车速环境下估计误差较大,提出了一种插值改进方法以改善高车速时的Doppler频移估计.最后根据迭代Doppler频移估计在不同迭代环节具有不同估计误差这一特性,提出了基于Doppler频移估计误差比的信噪比估计算法.计算机仿真结果表明,所提出的算法在一般通信系统的工作信噪比与车速范围内均有较好的估计性能,最高仿真车速达到了300 km/h.
[Abstract]:The signal-to-noise ratio (SNR) and Doppler frequency shift have an important effect on the communication quality in vehicular mobile communication. In this paper, the Doppler frequency shift estimation algorithm based on iterative autocorrelation function is studied. It is pointed out that the estimation error is large in high speed environment. An improved interpolation method is proposed to improve the Doppler frequency shift estimation at high speed. Finally, according to the characteristic that iterative Doppler frequency shift estimation has different estimation errors in different iterations, a signal-to-noise ratio estimation algorithm based on Doppler frequency shift estimation error ratio is proposed. The computer simulation results show that the proposed algorithm has good estimation performance in the operating signal-to-noise ratio (SNR) and the speed range of the general communication system, and the maximum simulation speed is up to 300 km/h..
【作者单位】： 浙江工业大学信息工程学院;
【基金】：国家自然科学基金(批准号:61471322)资助项目
【分类号】：TN929.5;U463.67
本文编号：2411925
[Abstract]:The signal-to-noise ratio (SNR) and Doppler frequency shift have an important effect on the communication quality in vehicular mobile communication. In this paper, the Doppler frequency shift estimation algorithm based on iterative autocorrelation function is studied. It is pointed out that the estimation error is large in high speed environment. An improved interpolation method is proposed to improve the Doppler frequency shift estimation at high speed. Finally, according to the characteristic that iterative Doppler frequency shift estimation has different estimation errors in different iterations, a signal-to-noise ratio estimation algorithm based on Doppler frequency shift estimation error ratio is proposed. The computer simulation results show that the proposed algorithm has good estimation performance in the operating signal-to-noise ratio (SNR) and the speed range of the general communication system, and the maximum simulation speed is up to 300 km/h..
【作者单位】： 浙江工业大学信息工程学院;
【基金】：国家自然科学基金(批准号:61471322)资助项目
【分类号】：TN929.5;U463.67
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1 李根深;基于移动通信的警车指挥系统终端机设计[D];吉林大学;2014年
，本文编号：2411925
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