OFDM system performance is more sensitive to frequency offset and timing error than single-carrier systems. OFDM系统中频偏和定时误差的存在,对系统性能有很大的影响。
New algorithm was adopted to offset the error caused by leakage current sensor. 采用新算法,克服了漏电流传感器本身的误差,以及传感器漂移带来的影响。
Performance analysis on the spatially correlated multiuser MIMO-OFDM systems in the presence of carrier frequency offset and channel estimation error; 提出了一种基于功率谱叠加的交织正交频分多址系统上行链路载波频偏和定时同步联合估计算法。
The reasons for inducing quadrature error and offset error are analyzed and the expressions of quadrature error and offset error are induced. 分析了正交误差和失调误差产生的原因,推导了正交误差和失调误差的表达式。
The actual airborne and satellite remote sensing imaging device, because of their own imaging principles and imaging platform jitter, is applied remote sensing image sub-pixel offset error. 实际的机载和星载遥感成像仪,由于自身成像原理和成像仪平台抖动原因,出现了遥感图像亚像素偏移误差。
Channel mismatches errors include offset error, gain error and time error. 通道失配误差包括偏置误差、增益误差和时间误差。
The current definition being parsed is { 0}. The stream offset where the error occured is { 1}. 当前正在对定义{0}进行语法分析。出现错误的流偏移量是{1}。
On the base of Elastic Mechanics, theory of offset error is founded through analyzing the main origin of error and its amenability in the course of experiment. 通过分析模拟试验过程中的主要误差来源及其可控性,以弹性力学为基础,建立了相似材料模拟试验的误差补偿理论。
Without a large number of precision reference voltages and with the consideration of matching problems, a BIST approach is proposed to test the parameters of DAC, which includes offset error, gain error, differential nonlinearity error, and integral nonlinearity error. 利用所提出的测试架构测试并计算了DAC的四个静态参数:偏移误差、增益误差、差分非线性误差和积分非线性误差,使其测试的精度在0.20LSB以下。
Discussion on Aligning Cutting Tool and Calculating Offset Error of Cutting Tool of Economical CNC Lathe 经济型数控车床的对刀及刀偏的计算方法探讨
Blind Estimation of Frequency Offset and Symbol Timing Error 频率偏移和符号定时误差的盲估计方法
Testing the Dynamic Offset Error of High Speed Analog to Digital Converter Using the Bispectrum Method 高速模数转换器动态偏置误差检测的双谱方法
Based on the focus pre-search a method is presented to measure the characteristics of the traverse focus error detection system: focus offset, focus error sensitivity and linear range. 利用聚焦预搜索原理,测量出小机芯离焦检测系统特性的关键参数:离焦偏置、离焦灵敏度和线性区范围。
Secondly, we use bispectrum to analyze the dynamic offset error of high speed ADC, point that the bispectrum method can greatly reduce the effect of the noise floor on the offset error testing, and improve the testing sensitivity and accuracy. 提出了利用双谱分析高速ADC动态偏置误差的方法。同时,指出双谱方法可以明显地减小ADC噪声本底对微小偏置误差测量的影响,提高测量的灵敏度和精度。
To improve the accuracy of the solution, an associated neural network using Kalman filter is used to compensate for the offset error. 为提高正解结果精度,引进辅助网络,运用Kalman滤波器进行误差补偿,并给出了并联机器人的仿真实例。
On the basis of key rock strata theory, transferring rock beam structure and the law of the overlying strata displacement and the surface subsidence theory, we deduced offset error formula. 以关键层理论、传递岩梁理论以及采场上覆岩层及地表移动规律理论为基础,推导出岩梁抗弯刚度的误差补偿公式。
The result shows that the lateral offset error of the sub-reflector is fallen distinctly by the compensation. 误差补偿后的计算结果表明,副面横偏误差得到了大幅度的减小。
After attaining synchronization, the phase offset due to frequency offset estimation error is tracked with a phase locked loop. 同步捕获后则通过锁相环技术跟踪长突发的同步变化。
Mathematical derivation proves that the reference makes the offset of position error more small, and accords with the running condition of practical fixation, which is more ideal. 应用数学演绎推理法证明了这种基准使位置误差偏移值最小,又符合实际装配工作条件,比较理想。
Effects of OFDMA system performance caused by frequency offset and synchronization error 频率偏移和同步误差对OFDMA系统性能的影响
The effects of OFDM synchronization errors, such as carrier offset, sample error and symbol timing error, are analyzed. 分析了载波同步、采样同步和符号定时同步对系统性能的影响。
However, OFDM system is so sensitive to frequency offset, timing error and phase noise that a tiny synchronization offset may lead to the deterioration of the BER ( Bit Error Rate) performance of system, even communication failure. 然而,OFDM技术对载波频率偏差、符号定时误差和相位噪声相当敏感,较小的同步误差即会导致系统的误码性能恶化,甚至于通信失效。
The offset and gain error correction are relatively simple, but the time-skew error correction is very difficult. 偏置误差和增益误差的消除相对简单,而时间相位误差的修正非常困难。
Through in-depth analysis of the causes of ripple, find out that the main factor affecting the ripple is the input offset voltage of error amplifier circuit in the prior to circuit. And by theoretical calculation the optimal value of the input offset voltage is obtained. 通过深入分析纹波产生的原因,指出影响纹波的主要因素是前向电路中误差放大电路的输入失调电压,并通过理论计算获得了输入失调电压的最优值。
The algorithm uses observation window in order to reduce the frequency offset error, in which average of every frequency offset estimation values of three symbols is obtained during frequency offset estimation. 改进的算法对连续三个符号进行ML估计,在进行频偏估计时,通过使用观察窗,在窗口内对频偏估计值进行均值运算,对频偏估计值误差进行矫正。
Based on the FO estimate, we derive the linear minimum mean square error ( LMMSE) channel estimator and analytically investigate the effect of frequency offset estimation error on the mean square error ( MSE) performance of the channel estimator. 2. 根据频偏估计值,推导了最小均方误差信道估计器,分析了频偏估计误差对信道估计器的性能影响。
The test result demonstrates that the system shows an offset error, but the linearity is quite well. 测试结果表明,系统存在失调误差,但表现出很好的线性度特性。
And also established the improved direct torque segmentation control simulation model, detailed analysis shows that the model integrator can effectively suppress the DC and DC offset error. 建立了分段改进直接转矩控制方式的仿真模型,经过分析,新型积分器能有效的抑制直流分量和直流偏移误差。
Offset error of speed, but will also affect the reflection characteristics of the bottom stratum. 偏移速度有误差时,还会影响下方地层的反射特征。
Two equivalent signal models with frequency offset and timing error are given, and then a joint estimation method is derived. 首先推导了两个包含频偏和定时误差的等效系统模型,然后基于这两种系统模型提出了一种联合定时误差、频偏和信道的估计方法。