频谱元件，载波频率。可指定频率类型。
Frequency spectrum element, carrier frequency. Frequency type can be specified.
频谱元件，载波频率。
OFDM的主要缺点是对载波频率偏差很敏感。
One of the principal disadvantage of OFDM is sensitivity to frequency offset.
自动载波频率跟踪部分的设计分了两个主要阶段。
The automatic carrier frequency tracking scheme is accomplished by two steps in our system.
载波频率偏移是OFDM系统实现的关键问题之一。
Carrier frequency offset is one of the key problems in OFDM system.
最后用这些变量调节本地振荡频率，以跟踪载波频率。
Finally, these judged variables adjust the local oscillating frequency to track the carrier frequency by NCO.
在载波频率已恢复的情况下给出了IQ正交分量的解调算法。
The demodulation algorithm for IQ components is given under condition that the carrier is recovered.
信道n（n为0...78）使用的载波频率为2402+nMHz。
Channel n (where n is 0...78) uses a carrier frequency of 2402+n MHz.
对于多载波系统，载波频率的偏移会导致子信道之间产生干扰。
The offset of carrier frequency can cause interference between subchannels in a multicarrier system.
本文介绍采用8031单片微机实现探鱼仪脉冲载波频率的测量。
This paper introduces the measurement of fish-Finder's pulse modulating frequency with the 8031 single chip computer.
文中提出了一种低复杂度的同步估计，来实现载波频率捕获和跟踪。
In this paper, a novel frequency synchronization estimation algorithm is provided to achieve carrier frequency capture and tracking.
OFDM系统存在对数据符号同步和载波频率偏移极为敏感的问题。
The OFDM is sensitive to the synchronization of the OFDM symbol and the carriers' frequency excursion.
其次对OFDM系统的定时同步算法和载波频率同步算法进行研究。
Secondly, the timing synchronization algorithm for OFDM systems and frequency synchronization algorithm were researched.
符号定时同步技术，载波频率同步技术和采样钟同步技术等几个方面。
We describe the synchronization technique in several keys including symbol timing, carrier frequency offset estimation and sampling clock offset estimation.
该方法的特点是所用设备简单，载波频率稳定和无相位误差积累影响。
The advantages of this system are that the equipment used is simple, that the carrier frequency is stable and that no affects of phase-error accumulation exist.
OFDM系统有两个方面的同步要求，符号定时同步和载波频率同步。
There are two main aspects about OFDM synchronization technologies: symbol timing synchronization and carrier frequency synchronization.
研究了MPSK信号载波频率的估计方法，采用三种算法进行载频估计。
The methods to estimate the carrier frequency of MPSK signals are researched.
同步技术是OFDM最关键的技术之一，它包括载波频率同步和符号同步。
As one of the most crucial technique of OFDM, synchronization technique includes carrier frequency synchronization and symbol synchronization.
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。
But both of them are sensitive to carrier frequency shift, further, they have comparative BER under AWGN and Doppler shift environment.
每个元素的信号波形可以改变：横向和纵向的频率，水平，阶段，副载波频率。
Each element of the signal waveform can be altered: Horizontal and Vertical frequencies, Level, Phase, and Subcarrier frequency.
本论文以某电子研究所研究项目为背景，主要研究了扩频信号载波频率捕获问题。
Based on a research institute of electronic technology 'project about TDRSS, in this thesis, carrier wave frequency acquisition of spread spectrum signal is studied and implemented.
针对正交频分复用(OFDM)系统提出了一种新的符号定时和载波频率同步算法。
A new symbol timing and carrier frequency synchronization scheme applicable to orthogonal frequency division multiplexing (OFDM) system was presented.
提出了一种新的正交频分多路（OFDM）传输系统定时和载波频率捕获联合算法。
This paper describes a novel joint acquisition algorithm of timing and carrier frequency for burst orthogonal frequency division multiplexing (OFDM) transmission system.
在通信系统中，接收机的同步要求精确地估计一些参数，比如载波频率和相位偏移。
In communication systems, the synchronization of the receiver requires to accurately estimate a number of parameters such as the carrier frequency and phase offset.
它直接对接收信号的相角进行处理，以完成载波频率的快速捕获和载波相位的跟踪。
It directly processes the phase of the received signal and realize fast capture of the carrier frequency and keeping the carrier phase.
在信号的中频数字接收过程中，数字下变频、载波频率与相位跟踪是设计的关键所在。
In the process of signal digital intermediate-frequency received, digital down convertion, frequency tracking of carrier and phase locked loop are the keys.
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。
Doppler effect causes not only carrier frequency offset, but also symbol expansion or compression for wideband acoustic communication signal.
本文根据OFDM系统特点，分析了OFDM系统的时域载波频率捕获和信道估计方法。
We propose new carrier frequency acquisition and channel estimation algorithms based on the time-domain analysis of OFDM system.
而OFDM系统设计中的难点之一就是OFDM系统对载波频率同步的精度要求特别高。
One of the key problems in OFDM system design is that OFDM system has high requirements about carrier synchronization.
而OFDM系统设计中的难点之一就是OFDM系统对载波频率同步的精度要求特别高。
One of the key problems in OFDM system design is that OFDM system has high requirements about carrier synchronization.
应用推荐