1) large Doppler offset
大多普勒偏移
1.
Aiming at the acquisition problem of direct sequence spread-spectrum(DSSS) signals with large Doppler offset,a new method based on fast Fourier transform(FFT) is proposed.
针对具有大多普勒偏移的直接序列扩频信号捕获问题,提出一种基于快速傅里叶变换(FFT)的多普勒和伪码分别并行搜索的捕获新方法。
3) maximum Doppler frequency
最大多普勒频移
1.
The maximum Doppler frequency shift is an important parameter which affects the performance of the OFDM system.
在OFDM系统中,影响其性能的一个重要参数就是最大多普勒频移。
4) large Doppler frequency shifting
大多普勒频移
1.
To actualize carrier-frequency capture under extremely low signal-to-noise ratio(SNR) and large Doppler frequency shifting, a method is proposed, which bases on bispectrum estimation using time-domain extraction and down converter.
针对极低信噪比大多普勒频移条件下载波提取问题,提出了一种基于AR模型双谱估计的下变频时域抽取载波提取方案,并在此基础上提出了分通道的改进方案,以及对其进行了MATLAB仿真。
5) Maximal Doppler Doppler shift estimation
最大多普勒频偏估计
6) Doppler shift
多普勒频偏
1.
Doppler shift estimation and pre-compensation of satellite communication;
卫星通信中多普勒频偏的预校正
2.
Several Doppler shift estimators, including mean logarithm envelope difference(MLED) method, auto-correlation function (ACF) method, zero crossing rate (ZCR) method and mean square phase difference (MSPD) method are discussed and compared.
针对几种多普勒频偏估计方法,分别为对数包络法、自相关函数法、各阶电平通过率法和均方相位差分法,在理论上分析了瑞利信道中它们的估计原理和估计偏差,说明了这些估计方法各自的适用场合。
3.
DFT-Code acquisition method can estimate Doppler shifts while searching PN phase.
DFT伪码捕获算法在进行伪码搜索的同时估计多普勒频偏,为了满足捕获精度要求,需要增加DFT点数,但随着运算点数的增加硬件实现难度成倍增长。
补充资料：大多
1.大部分;大多数。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条