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- Code frequency offset 码频频偏
- 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。
- 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。
- 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。
- A new code acquisition method based on phase difference correction of FFT is presented to solve the problem of long code acquisition time in high dynamic DSSS receivers having large frequency offset. 针对大频偏下高动态直扩接收机伪码捕获时间长的问题,提出了一种新的基于FFT相位精确估计频偏的改进方法。
- 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。
- In computer network communication, adopted the error- check control methods to reduce the error code frequency of data transmission commonly. The CRC (Cyclic Redundancy Check) method is the best one of them. 循环冗余码校验CRC是计算机网络通信中最常采用的数据校验方法之一,CRC方法能够很好地降低数据传输的误码率。
- 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。
- The paper studies the effects of timing synchronization and frequency offsets to the error code ratio of an orthogonal frequency division multiple access (OFDMA) system. 文章对频率偏移、系统同步性对OFDMA系统误码率等的影响进行了研究。
