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- Carrier frequency offset is one of the key problems in OFDM system. 摘要载波频率偏移是OFDM系统实现的关键问题之一。
- The results indicate that frequency offset can be obtained robustly. 海量实验数据证明,对应的数据是鲁棒的。
- The simulation for QPSK shows that the algorithm can estimate the carrier phase and frequency offset accurately and reduce the system BER effectively. 结果表明，用该算法可以精确估计载波相位和频差，有效地降低系统的误码率。
- The ways of estimating the frequency offset and Doppler spread width in WCDMA system are studied in this paper. 本文主要研究了WCDMA(宽带码分多址)系统中频偏和最大多普勒频偏的估计方法。
- It has previously been shown that PCC substantially reduces the sensitivity of OFDM to carrier frequency offset. PCC能够显著地降低OFDM对载波频偏的敏感性。
- A novel scheme of estimating the carrier frequency offset in CDMA system with the continuous pilot channel is proposed. 摘要本文针对存在载频频偏的CDMA系统，提出了一种新的估计该固有频偏的方法。
- A new frequency offset and channel estimation joint algorithm for OFDM system is proposed. 摘要针对正交频分复用系统提出一种新的频偏与信道联合估计的算法。
- Based on the fixed sampling interval technique, an improved phasor computing algorithm is proposed to correct the errors caused by DFT in the presence of frequency offset. 推导出一种在定间隔采样基础上能够有效消除非额定频率下离散傅里叶变换(DFT)算法产生的频率泄漏影响的相量校正算法。
- Then the phase trajectory is estimated based on MMSE criterion, and the frequency offset and initial phase can be achieved. 在此基础上，基于MMSE准则计算载波相位的轨迹，得到频差和初始相位。
- OFDMA inherits from OFDM the weakness of being sensitive to synchronization errors, especially to carrier frequency offset(CFO). OFDMA系统继承了OFDM对同步误差敏感的缺点，尤其是对载波频率偏移(CFO)。
- In this thesis, a joint symbol timing and carrier frequency offset estimator is proposed for orthogonal frequency division multiplexing (OFDM) systems. 中文摘要本论文里，我们提出了一个应用在正交分频多工系统中的符元时间与载波频率误差估测器。
- By mitigation with the aid of time-frequency interleaving, we develop effective frequency offset estimation under interference in this thesis. 这篇论文，主要是在利用时频交错的协助，发展出在干扰环境下有效的频率偏估测方法。
- If the frequency offset is large enough, the traditional PLL cannot be locked.Such situation would lead to the system corruption. 当频差较大时，接收端用于载波恢复的锁相环路无法锁定，导致系统不能正常工作。
- This paper presents a structure based on noncoherent-SPRT algorithm for the sequence acquisition under large frequency offset and low signal to noise ratio in DS/SS systems. 该文研究大频偏低信噪比情况下DS/SS系统中的序列捕获问题,介绍了一种基于非相干序贯检测算法的捕获结构。
- In this paper, three Data-Aided (DA) open-loop frequency offset estimation algorithms-Kay, Fitz, and Luise and Reggiannini(L &R) algorithms - are analyzed. 分析了基于最大似然准则的3种典型数据辅助(DA)开环频偏估计算法:Kay算法、Fitz算法和L &R算法。
- It is required that the length of each hop is at least 80 symbols to achieve effective timing error and frequency offset estimation as to demodulate the signal without any delay. 仿真结果表明每跳要传输80比特以上，才能够完成位定时与载波同步并实时解调。
- Frequency offset is captured by utilizing the repetition structure of training frame and eliminating the channel impulse response influence and the time error influence. 算法利用训练帧结构的循环重复性特点，剥离信道的影响和定时偏差的影响，完成频偏的捕获。
- In order to avoid such problems as symbol sliding, phase shift of pseudorandom noise code and carrier phase offset, an improved method of frequency offset estimation is proposed. 摘要为避免采样频率偏差给卫星导航接收机带来的符号位滑动、伪随机噪声码相位移动和载波相位偏差等问题，提出了一种改进的频率偏差估计方法。
- Simulation results show that the accuracy of timing synchronization and the estimate range of the frequency offset outperform those of the other available methods. 仿真结果表明所提方法的符号同步偏移估计精度和频偏估计范围均优于已有的同步方法。
- Based on the timing synchronization, the PN weighted factor in the training symbol is removed, and the renewed training symbol is used to estimate the frequency offset. 在符号同步的基础上，利用消去新训练符号中伪随机加权因子的数据序列进行频偏估计。
