多普勒频移

• The characteristic of the time - variety channel may be represented by rayleigh fading and doppler frequency shift
  这种信道的时变特性可用瑞利衰落和多普勒频移来表征。
• Besides amplitude , phase and doppler frequency , polarimetric information is the fourth characteristic in the radar echo
  雷达回波信号中,除幅度、相位和多普勒频移外,还存在第四特征? ?极化信息。
• 2 . based on watterson model , this paper concentrates on the realization of doppler shift and doppler spread based on dsp
  2 .针对watterson信道模型,着重研究了多普勒频移与多普勒扩展在dsp中的实现方法。
• According to the laser gain change is linear related to the frequency shift , the doppler frequency is extracted by the signal processing
  根据激光的增益变化和频率变化成线性关系，可以对信号进行处理求出多普勒频移。
• When the doppler frequency shift is big and the rayleigh fading is serious , it would affect the despread and demodulation algorithm of the signal badly
  当多普勒频移较大,瑞利衰落严重时,将严重影响信号的解扩解调。
• The energy centrobaric method is made use of correcting the doppler spectrum , the simulation predicted value of the target velocity is obtained
  用能量重心校正法对多普勒频移校正，进而得到物体的运动速度的模拟计算值。
• In this paper , analyse the effect of doppler shifting to directing - fmding and the error to the location , and give the method to solve these problems
  本文还分析了多普勒频移对测向的影响和测向误差等因素对定位的影响，并提出了解决方法。
• In addition , the article also proposed two kinds of method to achieve phase difference between echo waves with doppler shift to increase its precision of angle measurement
  此外,文中还提出了信号回波多普勒频移影响下的两种相位差提取方法,以提高短基线干涉仪角度测量精度。
• The statistical performance of the joint estimation method is discussed based on the simulation , and the results show the good performance of the method at low snr . 4
  研究了低信噪比情况下利用时频分析方法进行时延和多普勒频移联合估计的性能，表明联合估计方法的统计性能良好。
• This algorithm can capture and trace the signal with the frequency shift larger than the symbol rate under low e ( subscript b ) / n0 when combining with proper frequency trace algorithm
  该算法结合相应的频率跟踪算法能够在低信噪比条件下实现多普勒频移远大于符号速率的信号捕获与跟踪。