The OFDM is sensitive to the synchronization of the OFDM symbol and the carriers' frequency excursion.
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。
A symbol timing algorithm for orthogonal frequency division multiplexing (OFDM) systems with the cyclic prefix under wireless channels is proposed.
提出了一种新的无线信道下基于循环前缀的正交频分复用系统符号定时同步算法。
The most critical causes yielding the ISI as well as ICI are symbol timing and carrier frequency offset which are occurred in the OFDM receiver.
而产生ISI和ICI的主要原因是在OFDM系统接收端产生的符号定时偏差和载波频率偏差。
As one of the most crucial technique of OFDM, synchronization technique includes carrier frequency synchronization and symbol synchronization.
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。
It can waken the multipath effect availably, eliminate symbol interference and fight against frequency select fading. Moreover, the channel utilization rate is high.
他能有效地对抗多径效应，消除符号间干扰，对抗频率选择性衰落，而且信道利用率高。
A new symbol timing and carrier frequency synchronization scheme applicable to orthogonal frequency division multiplexing (OFDM) system was presented.
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 novel symbol synchronization and carrier frequency offset estimation method is presented for 39-tone OFDM systems.
针对短波39音OFDM系统，提出了一种新型的符号同步和载波频偏估计方法。
Various existing synchronization algorithm to estimate symbol timing offset and carrier frequency offset can be classified into blind and pilot-aided methods and algorithm based on cyclic prefix.
目前，估计载波频率偏差和符号定时偏差的算法主要有数据辅助的方法和非数据辅助的方法以及基于循环前缀的算法。
We describe the synchronization technique in several keys including symbol timing, carrier frequency offset estimation and sampling clock offset estimation.
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。
The COFDM modulation part is made up of blocks partition, COFDM symbol forming, DQPSK symbol mapping, frequency interleaving, difference modulation and COFDM modulation and so on.
实现不同帧之间的比特交织等。COFDM调制部分包括块划分及COFDM符号形成、DQPSK符号映射、频率交织、差分调制及COFDM调制等环节。
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。
The research contents mainly consist of symbol rate estimation, carrier frequency offset estimation, modulation recognition and blind demodulation.
研究内容主要包括：符号率估计、载波频偏估计、调制方式识别以及盲解调等。
There are two main aspects about OFDM synchronization technologies: symbol timing synchronization and carrier frequency synchronization.
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。
Due to the obvious impact of frequency offset on PN sequences, based on the FH sequence, a symbol synchronization scheme with a conjugate symmetric training sequence is proposed.
针对频偏对PN序列相关性影响比较明显的问题，提出了一种利用FH序列构造的具有共轭对称性质的训练序列进行符号同步的方案。
In this paper, a new frequency and symbol synchronization algorithm for OFDM systems is proposed.
提出了一种正交频分复用(OFDM)系统的频率和时间同步算法。
By means of a symbol of operation, the new analytical expressions of the frequency equation and the modal function of lateral vibration of a beam with lumped masses were derived.
引入运算符号，导得带任意个集中质量的梁弯曲振动频率方程和振型函数新的解析表达式。
Estimating and compensating carrier frequency offset are to achieve carrier frequency synchronization. Estimating symbol rate and correcting timing error are used to synchronize symbol.
估计并补偿频偏是为了实现载波同步，估计符号率和校正定时误差是为了实现码元同步。
Then influences of frequency offset and observation interval on symbol timing recovery system under this circumstance were studied.
针对这一特点，研究了加入卡尔曼滤波后频偏及观测时间长度对定时系统性能的影响。
Each symbol flashed with a different frequency so that the researchers could tell from the evoked electrical potentials in the brain to which symbol the participants were attending.
每个标志闪烁的频率都不同，因此够根据大脑中的稳态视觉诱发电位，研究者们能就可以知道参与者关注了哪一个标记。
An improved algorithm for symbol synchronization and symbol decision are proposed. Their performance at different level of SNR and frequency offset are discussed by simulations.
本文提出了一种改进的码元同步算法和改进的码元判决算法，通过仿真分析了它们的抗噪声和抗频偏性能。
Symbol timing and carrier frequency offset will significantly degrade the performance of OFDM(Orthogonal Frequency Division Multiplexing)receiver.
符号、载波偏移严重影响着正交频分复用（OFDM）接收系统的性能。
Paper, some of the symbols is as follows: Fc is carrier frequency, Fd for the symbol rate, Fs is sampling frequency.
文中部分符号如下：Fc为载波频率，Fd为符号率，Fs为信号采样频率。-。
In modern shortwave communication systems, the channels are mostly frequency-selective, multipath transmission causes the coherent attenuation and symbol interference.
现代短波通信系统，其信道大多数具有频率的选择性，多径传输产生了信号的相干衰落与符号干扰。
Timing offset causes inter-symbol interference, and frequency offset would destroy the orthogonality between subcarriers, causing ICI, which lead to a sharp decline in overall system performance.
定时偏差会导致码间干扰，频率偏差会破坏子载波间的正交性，引起子载波间干扰，从而使系统整体性能急剧下降。
At last, this paper analyses the delay correlation properties of 2fsk signal, and proposes a new algorithm for symbol synchronization, which shows better performance when frequency offset exists.
最后，从抗频偏的角度出发，通过分析2fsk信号的延迟相关特性，给出了一种码元同步算法，具有良好的抗频偏性能。
This paper chiefly studies joint symbol timing and carrier frequency synchronization.
本文主要研究载波和符号定时的联合同步。
This paper chiefly studies joint symbol timing and carrier frequency synchronization.
本文主要研究载波和符号定时的联合同步。
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