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首页> 外文会议>Consumer Electronics, Communications and Networks (CECNet), 2012 2nd International Conference on >An algorithm for Doppler shift and Doppler rate estimation based on pilot symbols
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An algorithm for Doppler shift and Doppler rate estimation based on pilot symbols

机译：基于导频符号的多普勒频移和多普勒速率估计算法

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摘要

To achieve fast carrier synchronization in low SNR circumstances for burst transmission satellite mobile communication systems, we present a joint-estimation algorithm for Doppler shift and Doppler rate based on pilot symbols. The algorithm selects finite Doppler rate test values, figures out several sets of Doppler shift and Doppler rate using existing low-complexity frequency estimation algorithm, and gets the final estimation result according to ML criterion. The simulation results show that this algorithm has low SNR threshold, and its estimation performance is close to Cramer-Rao Lower Bound (CRLB). The algorithm's computational complexity is much lower than ML algorithm, and it is very suitable for practical application.
机译：为了在突发传输卫星移动通信系统的低SNR情况下实现快速载波同步，我们提出了一种基于导频符号的多普勒频移和多普勒速率联合估计算法。该算法选择有限的多普勒速率测试值，使用现有的低复杂度频率估计算法找出多组多普勒频移和多普勒速率，并根据ML准则获得最终的估计结果。仿真结果表明，该算法具有较低的SNR阈值，其估计性能接近Cramer-Rao下界（CRLB）。该算法的计算复杂度远低于ML算法，非常适合实际应用。

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