车载动中通信标跟踪的广义延拓逼近算法

发布时间：2018-04-09 04:07

本文选题：动中通系统　切入点：载波频率跟踪　出处：《西安电子科技大学学报》2017年04期

【摘要】：为了提高车载动中通系统对卫星信标信号的频率跟踪精度,提出了利用一元广义延拓逼近实现锁频环鉴频器的算法.该算法通过对卫星信标信号功率谱样点域进行单元划分,在保证样点域节点处满足插值条件的前提下,实现单元域内的最佳拟合,能够有效地提升整域内的逼近精度.通过对亚洲3s卫星信标信号的静态和动态跟踪,证实该算法具有很好的动态跟踪性能,在40ms积分时间内,可使频率跟踪误差限制在±2Hz以内,有效地提升了载波频率跟踪环路的跟踪精度.一元广义延拓逼近频率跟踪算法的数学模型稳健,复杂度低,在保证动态性能和较高跟踪精度的前提下,具有很好的可实现性.
[Abstract]:In order to improve the accuracy of frequency tracking of satellite beacon signals by vehicle moving midway system, an algorithm of frequency locked loop frequency discriminator based on univariate generalized continuation approximation is proposed.By dividing the power spectrum sample domain of the satellite beacon signal into units, the algorithm realizes the best fitting in the unit domain on the premise that the node in the sample domain satisfies the interpolation condition, and can effectively improve the approximation accuracy in the whole domain.Through static and dynamic tracking of 3s satellite beacons in Asia, it is proved that the algorithm has good dynamic tracking performance, and the frequency tracking error can be limited to 卤2Hz within the 40ms integral time.The tracking accuracy of carrier frequency tracking loop is improved effectively.The mathematical model of the one-variable generalized continuation approximation frequency tracking algorithm is robust and low complexity. It has good realizability on the premise of ensuring the dynamic performance and high tracking accuracy.
【作者单位】：中国科学院国家天文台;中国科学院大学;广西精密导航技术与应用重点实验室;
【基金】：国家自然科学基金资助项目(11603041) 广西精密导航技术与应用重点实验室资助项目
【分类号】：TN927.2

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