frequency carrier shift的意思|示意

A form of frequency modulation in which the carrier frequency is shifted between a mark frequency and a space frequency in response to the impressed intelligence signal (frequency-shift keying).

频率调制的一种方式，其中载波频率在标志频率和场频率之间移动，以响应外加的情报(数据)信号。

The carrier phase shift technique based parallel back-to-back PWM converter is used on the direct-drive wind power system, with a switching frequency as low as 1 kHz.

直驱型风力发电系统需要全功率变流器，在现有器件功率水平以及开关频率等诸多因素制约下，变流器直接并联的方式具备结构简单、模块化设计、易扩展的优点。

But both of them are sensitive to carrier frequency shift, further, they have comparative BER under AWGN and Doppler shift environment.

但两者都对载波频率偏移敏感，且在AWGN和多普勒频移环境下表现相当。

According to P-code features of large Doppler frequency shift and long code period, the method that shortens the scope of carrier frequency search is studied.

针对P码多普勒频移大、周期长的特点，本文探讨了缩短载频搜索范围的方法。

Time-selective Rayleigh fading of channels is caused by Doppler shift and carrier frequency offset.

接收端的高速运动或者载频的偏移，会引起信道的时间选择性衰落。

About GPS receiver, the research importance is high-dynamic receiver. The key is to solve the Doppler frequency shift caused by the high-speed movement of carrier.

在GPS接收机中，目前研究的重点是高动态环境下的接收机，其关键是解决载体高速运动给GPS接收机附加的多普勒频移问题。