Immediately after you switch from bulk - logged to full recovery , back up the log . this fully protects your data and enables point in time recovery 从大容量日志恢复切换到完整恢复时,为了全面保护您的数据以及在enterprise edition中启用时点恢复,请在切换后立即备份日志。
As a part of adas , author have designed , drew up and implemented signal processing hardware equipments and a code timing recovery circuit based pci interface 本课题是便携式遥测跟踪接收系统的一部分,主要完成的是遥测跟踪接收系统信号处理硬件平台的设计与实现,以及基于pci接口的位同步器的设计与实现。
You can either use a copy of your backup image and roll it forward to the time right before the table was dropped point - in - time recovery , or you can restore a logical backup through the exp utility 您可以使用备份映射的副本,并将它前滚至删除表之前的某个时间点(时间点恢复) ,或者您可以通过exp实用程序恢复逻辑备份。
These results prove that the design method has great affection to reduced timing jitter . at the same time , simulate the convergence characteristic of timing recovery loop which is added prefilter when the input qam 同时还仿真了加预滤波器后定时恢复环路在有载波误差、交叉串扰情况下的收敛情况,证明了所设计定时恢复环路是正确的。
When a user drops a table in db2 udb , you can either do a database level point - in - time recovery , rolling forward to the point before the table is dropped ; or , better still , use a table space level roll forward operation 当用户删除db2 udb中的表时,您可以执行数据库级时间点恢复,前滚至删除表之前的时间点;或者最好仍然使用表空间级的前滚操作。
Design the parameter of timing recovery loop . simulate the convergence of timing recovery loop . these results prove that gardner algorithm can converge even if the input qam signal existing the carrier error and intersymbol interference 设计了环路各个部分的参数,仿真了定时恢复算法的收敛情况,证实了gardner算法在有载波相位误差、交叉串扰情况下仍能够很好收敛。
Chapter 7 introduces and analyzes some timing error detection and feed - forward timing recovery algorithms for gmsk signal . the auto - correlation method is improved by using a post - filter . simulation results show that the improved method has better estimation accuracy 首先分析比较了常见的gmsk符号同步的定时误差检测器算法和前向定时参数估计算法,并用后滤波的方法对定时参数估计的自相关法提出了改进,提高了算法的估计精度。
After introduction of the whole fpga design of b3g downlink , chapter four schemed out every function module such as time synchronization , frequency synchronization , timing recovery , last frame detect , ofdm demodulation and rocket i / o interface etc . lots of structure schemes and simulation waves were presented 主要包括时间同步模块、频率粗同步模块、频率精同步模块、定时恢复模块、尾帧检测模块、 agc / afc辅助模块、 ofdm解调模块和rocketi / o接口模块等。
Chapter three provides synchronization algorithms in dvb - t cofdm receiver , including symbol timing recovery , carrier frequency error estimation and sampling timing recovery . chapter four introduces some channel estimation algorithms based on interpolation in dvb - t receiver . five estimators are compared , in terms of mean - squared error both in rayleigh channel and ricean channel 第三章首先讨论了由于载波频率偏差、符号定时偏差和采样定时偏差对ofdm系统所造成的影响和干扰,然后针对dvb - t系统的cofdm接收机方案,分别给出了符号定时同步、频率同步以及采样钟同步的实现算法,并对它们的性能进行了分析仿真。
Design a kind of sub - optimum digital prefilter . through the simulation of timing recovery loop which is n ' t added prefilter and which is added prefilter , discuss the convergence characteristic and compare the relation between timing jitter and signal to noise ratio , the relation between timing jitter and noise bandwidth of loop , the relation between symbol error ratio and signal to noise ratio 通过对加预滤波器后的定时恢复环的仿真,讨论了环路的收敛情况,比较了所设计的数字预滤波器和无预滤波器时环路定时抖动与信噪比、定时抖动与环路噪声带宽、误码率与信噪比的数量关系,证实所设计的数字预滤波器对减少定时抖动非常有效。