片语

carrier r frequency equipment载频设备

carrier-frequency hologram载频全息图

chaotic carrier fundamental frequency混沌载波基频

carrier-frequency range载频范围英语

Carrier-Frequency Extraction载频提取

carrier r frequency generator载频发生器

carrier wave frequency载波频率

carrier r frequency cable载频电缆

carrier jumping frequency载波跳频

英汉例句

• the acquisition process has to search both carrier frequency doppler shift and pn code phase, so the whole acquisition process is a two-dimensional search process.

  扩频信号的捕获，既要完成载波频率的捕获，又要完成伪码相位的捕获，是一个二维的捕获过程。

• at a repetition rate nearly equal to the carrier frequency of the reticle system, the jamming source will disturb the target's signal received by the seeker, and make the seeker lose the target.

  而重复频率近似等于调制盘系统调制波形载频的光脉沖会干扰导引头接收到的目标信号，使导引头失去目标。

• using the planar search, code start point and carrier frequency were reached at the same time.

  采用了二维联合搜索的快速算法，同时捕获扩频信号的载频和码起点。

• for multiple-antenna ofdm systems, a clock frequency offset detection algorithm is presented. the algorithm can work before carrier frequency offset compensation.

  针对多天线ofdm系统提出一种可用于频率选择性衰落信道的时钟频偏估计算法，这种算法可以在存在载波频偏的情况下工作。

• output signal can be internal or external low-frequency sine am or fm signal, so that the carrier frequency output voltage to decay to below 1 v microcontroller.

  输出信号可用内部或外加的低频正弦信号调幅或调频，使输出载频电压能够衰减到1微伏以下。

• the most important section of carrier recovery subsystem is carrier frequency synchronization.

  载波频率同步是载波恢复的重要环节之一。

• the orthogonal multicarrier modulation, which is the main character of ofdm, determines that it is very sensitive to both timing synchronization error and carrier frequency offset.

  ofdm系统自身的正交多载波调制特点，决定了其对定时误差和载波频率偏差十分敏感。

• a new method to estimation the carrier frequency in direct sequence spread spectrum(ds/ss) is proposed.

  在直接序列扩频（ds/ss）通信系统中，提出了一种简单的长码周期检测方法。

• these variables are carrier frequency off-set value, pre-emphasis factor, weighting factor, video spectral distribution and nominal peak to peak frequency deviation.

  这些变量是载频差、预加重因子、加权因子、视频频谱分布以及标称峰-峰频偏。

• doppler effect causes not only carrier frequency offset, but also symbol expansion or compression for wideband acoustic communication signal.

  多普勒不仅造成宽带水声通信信号的载波频率偏移，而且引起码元符号的展宽或压缩。

• cross-zero is a classical analytic method of modulate-domain which has good effect on the carrier frequency signal, linear frequency modulation signal and fsk signal.

  过零检测法是一种经典的调制域分析方法，它原理简单，计算方便，对单载频、线性调频和fsk信号有着较好的效果。

• carrier frequency offset estimation is one of key technologies in digital relay satellite systems.

  载波频偏估计是数字中继卫星通信系统中的一个关键技术。

• 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。

• the system uses time-frequency tracking loops to extract phase errors from data subcarriers with frequency interpolation to compensate for the estimated carrier frequency offsets.

  该方法使用了时频同步跟蹤环路，从数据子载波提取相位误差，并利用频域插值补偿多个用户的估计频偏。

• lastly, the jamming effectiveness is emphatically analyzed in the presence of bit error, bit width error and carrier frequency error.

  最后分析了干扰信号在存在误码、码元宽度误差以及载频误差情况下的干扰效果。

• carrier frequency offset is one of the key problems in ofdm system.

  载波频率偏移是ofdm系统实现的关键问题之一。

• being different from tdd system, the behavior of up and downlink in fdd system is not so identical because of the difference of carrier frequency between uplink and downlink.

  与tdd系统不同，fdd系统由于存在上下行链路间的频差，使上下行无线信道的性能差异很大。

• then the influence of carrier frequency error on code loop and influence of code phase error on carrier loop in different noise are discussed in simulation.

  利用计算机仿真方法详细分析不同噪声环境下，载波频差对码跟蹤环路输出、码相位差对载波跟蹤环路等因素的影响；

• the former is used to achieve the fine estimation of the carrier frequency while the later is used to achieve the fine estimation of the code delay of the prn code.

  载波跟蹤环用于对接收信号的载波频率进行精确跟蹤，而码跟蹤环是用于实现伪随机码延时的精确对準。

• this thesis deals with the algorithms of carrier frequency offset and phase error for mpsk signal.

  本文主要研究mpsk信号的载波频偏和相位误差的估计和恢复算法。