但是OFDM技术有众所周知的缺点：对定时偏差和频率偏差十分敏感。
However, there are well-known shortcomings of OFDM technology: the timing offset and frequency offset is very sensitive.
文中分析了同步偏差即定时偏差和载波恢复相差对MPAM和MQAM接收性能的影响。
The influences of timing offset and carrier phase offset on the performances of MPAM and MQAM are analyzed.
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.
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.
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.
定时器最小定时引起的同步偏差已有众多学者研究，信号周期飘移下的同步采样则较少有人涉足。
Synchronous deviation caused by limitation of the timer has already been studied by numerous scholars, however, Synch-sampling in the instance of signal cycle instability has been less discussed.
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.
结论在进行合并高度近视的POAG视野结果判定时要依靠模式偏差概率图。
Conclusion Pattern deviation probability plots is an important favor for judgement of the visual field changes in POAG with high myopia.
结果表明，用本法对实际茶叶样品测定时，相对标准偏差小于4 ％，回收率为94．5％-101．8％。测定茶叶标准样品时结果与标准值相符。
The results indicated that the relative standard deviation is less than 4% and the recovery is in the range of 94. 5%-101. 8% by this method.
那些乐声不拘泥于传统格调时间的要求，或者只是在相隔一定时间偏差演奏，这只是爱好问题。
Whether the sound is timeless or just stuck I a time warp is a matter of taste.
那些乐声不拘泥于传统格调时间的要求，或者只是在相隔一定时间偏差演奏，这只是爱好问题。
Whether the sound is timeless or just stuck I a time warp is a matter of taste.
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