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Lagrange

于 2021-03-14 发布

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下载积分: 1 下载次数: 3

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代码说明：

说明：拉格朗日插值卫星精密星历（包含主函数及非滑动式及滑动式插值脚本，脚本请按实际情况进行修改后使用）(Lagrange interpolation satellite precise ephemeris(including main function and non sliding and sliding interpolation scripts. Please modify the script according to the actual situation ))

文件列表：

Lagrange\Lagrange.m, 542 , 2020-05-23
Lagrange\UntitledF.m, 5756 , 2020-07-25
Lagrange\UntitledH.m, 6515 , 2020-07-25
Lagrange, 0 , 2020-08-06

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kalman
Carrier-phase synchronization can be approached in a general manner by estimating the multiplicative distortion (MD) to which a baseband received signal in an RF or coherent optical transmission system is subjected. This paper presents a unified modeling and estimation of the MD in finite-alphabet digital communication systems. A simple form of MD is the camer phase exp GO) which has to be estimated and compensated for in a coherent receiver. A more general case with fading must, however, allow for amplitude as well as phase variations of the MD. We assume a state-variable model for the MD and generally obtain a nonlinear estimation problem with additional randomly-varying system parameters such as received signal power, frequency offset, and Doppler spread. An extended Kalman filter is then applied as a near-optimal solution to the adaptive MD and channel parameter estimation problem. Examples are given to show the use and some advantages of this scheme.

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Lagrange

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