| 摘要: |
| 为了解决船载外测设备采样数量大的问题，船中心机必须对外测数据进行实时预处
理，适当压缩后才能向外发送。将多项式拟合的方法应用到外测数据的实时压缩算法之
中，通过建立一组正交多项式基，运用最小二乘法估计得到拟合点的平滑公式，在综合分析
多项式截断误差和随机误差的基础上总结得出最佳压缩多项式次数和采样点数。理论分析和
实例仿真结果均表明，该方法达到了良好的压缩和滤噪的效果，能够在比较高的精度范围内
体现数据的真实曲线特征。 |
| 关键词: 航天测量船 外测数据 多项式拟合 数据压缩 滤噪 |
| DOI： |
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| 基金项目: |
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| Application of Polynomial Fitting in Real-time Compressing Algorithm for Outer-trajectory Measurement Data of TT&C Ship-borne Equipment |
| WU Jin-mei,HU Shang-cheng,LING Xiao-dong |
| (China Satellite Maritime Tracking and Control Department,Jiangyin 214431,Chi
na) |
| Abstract: |
| In order to save storage space and improve transport efficiency from huge of dyn
amic data of TT&C ship-borne trajectory measurement equipment, the ship-b
orne central computer must reprocess and compress the data. An algorithm based
on polynomial fitting for real-time trajectory data compression is proposed in this paper. A series of orthogonal polynomial basis are presented and th
e
smoother formula of output point with the least square filtering is applied. Wh
en the truncation error and random error are considered simultaneously, the best
filter is obtained .Computational results show the novel algorithm is a promise
d compression and noise filtering method. |
| Key words: space TT&C ship outer-trajectory measurement data polynomial fitting data compressing noise filtering |
《电讯技术》编辑部 