...（自然科学版、英文版） 关键字: XFAST；长码直捕；参数优化；多普勒；载噪比[gap=766]Key words: XFAST; long code acquisition; optimization of coefficients; Doppler; carrier to noise ratio..
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long code fast acquisition 长码快速捕获
A new code acquisition method based on phase difference correction of FFT is presented to solve the problem of long code acquisition time in high dynamic DSSS receivers having large frequency offset.
针对大频偏下高动态直扩接收机伪码捕获时间长的问题，提出了一种新的基于FFT相位精确估计频偏的改进方法。
This paper proposes an extended RLC(Run Length Code)data acquisition method. The detected signal has the feature of long time lasting and transienting characteristic waveforms.
针对被检测信号具有长时间域、瞬变特征波形的时域位置不确定等特点，提出一种扩展游程编码数据采集方法。
The paper discusses the acquisition and tracking of the PN code and the tracking of the carrier in high dynamic range , low SNR and long PN code.
讨论了高动态、低信噪比、长伪码序列扩频信号的伪码捕获、跟踪、载波跟踪与数据解调方法。
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