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- 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。
- 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 Design of DPLL for Low SNR Signals with Large Frequency Offset 一种大频偏和低信噪比条件下的全数字锁相环设计
- Symbol Timing Estimation under Large Frequency Offset and Low Signal to Noise Ratio in OFDM Systems 大频偏低信噪比条件下OFDM系统中的符号定时估计
- Large Frequency Offset Estimation Algorithms for Satellite CDMA Baseband Signals 卫星CDMA基带信号的大频偏估计算法
- FPGA Implementation of Baseband Processing Algorithms for Satellite Spread Spectrum Signals with Large Frequency Offset 大频偏卫星扩频信号的基带处理算法的FPGA实现
- large frequency offset 大频偏
- 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。
- 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。
- 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 design of programmable large frequency band-width precise delay apparatus. 可编程宽频带精密延时器设计。
- But there are a lot of questions in DS-CDMA satellite communication system, such as the fading of received signal, the multiple access interference (MAI), large Doppler frequency offset, the CW and narrow band interferences in channel and so on. 但是，在DS-CDMA小卫星通信系统中，亦存在如下问题：如接收信号的衰落、多址干扰(MAI) 、大的多普勒频移、信道中的连续波(CW)及窄带干扰等。
- 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)。
