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.
该算法具有较大的估计载波频率偏差的范围和较高的估计精度。
The algorithm features the large estimation range for carrier frequency deviation and high estimation accuracy.
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。
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.
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。
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.
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。
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.
在上行链路中每个用户由于载波频率偏差而存在潜在的不同步，这样使子载波之间失去正交性，从而在基站接收端产生多用户间干扰。
However in uplink channel, each user has its own frequency offset which leads to a loss of orthogonality among the sub-carriers and multiuser interference at the base station receiver.
在无线移动通信中，接收机的本地振荡频率和载波频率之间往往存在较大的频率偏差，AFC用于克服此频偏。
In wireless communication system, there is a large frequency bias between carrier frequency and local oscillating frequency. AFC is contributed to eliminate it.
为了减小正交频分复用系统受频率偏差的影响，在OFDM系统中设计了一种新的载波频偏估计算法。
To reduce the impact of carrier frequency offset in OFDM system, this thesis designs a new carrier frequency offset estimation scheme for OFDM system.
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。
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。
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.
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