This dissertation investigates the topic of time and frequency synchronization for OFDM and MIMO-OFDM systems.
准确的时间同步和精确的频率同步是OFDM系统和MIMO OFDM系统正常工作的前提。
However OFDM and MIMO OFDM systems are very sensitive to time and frequency synchronization errors, especially the frequency synchronization error.
但OFDM系统和MIMO OFDM系统对时间和频率同步误差很敏感，特别是频率同步误差。
A new time and frequency synchronization method based on frequency domain correlation for an Orthogonal frequency Division Multiplexing (OFDM) system is presented.
该文根据频域相关的原理，提出了一种新的用于无线移动信道下的正交频分复用(OFDM)系统的时频同步算法。
However, the cell search including time and frequency synchronization, and cell id identification is one of the most important issue that must be deal with for any OFDM cellular systems.
然而系统的时频同步与小区搜索的接入过程是任何OF DM蜂窝系统必须解决的首要问题。
A feasible scheme using PAL TV signal for proceeding active time and frequency transfer and synchronization is described in this paper.
本文介绍了利用PAL制电视信号进行有源电视时间频率传递与同步的一种可行的方案。
Triggering time synchronization error model is derived, and based on phase noise model of frequency source, random synchronization error is considered.
本文建立了触发时间同步误差模型，结合频率源相位噪声模型，初步分析了随机型时间同步误差对成像的影响。
A more precise estimation method of the Zero Doppler Time has been improved, and the frequency synchronization is achieved.
文章改进了零多普勒时间的估计方法，提高了其估计精度，从而较好地实现了频率同步。
A phase error model, in which the time synchronization error, frequency synchronization error and motion error are considered, reveals the sources of phase errors.
同步以及运动误差会引入相位误差，本文中提出了相位误差模型。
The time synchronization and carrier frequency offset estimation can be achieved simultaneously.
该算法能够同时实现时间同步与频偏估计。
The prerequisites of normal work of OFDM system are the precise time synchronization and the accurate frequency synchronization.
精确的时间同步和准确的频率同步是OFDM系统正常工作的前提条件。
The phase detecting error caused by local oscillator frequency drift and non-synchronization of measurement signal and gate signal is eliminated and the measurement speed is improved at the same time.
该方法可以有效的消除因本振信号频率漂移及闸门信号与被测信号的非同步引起的测相误差，同时提高了测量速度。
The frequency domain electric transmitter and receiver synchronization electrocircuit has been designed. It is concluded that the GPS time synchronization is feasible in this instrument.
设计了在频率域电法勘探中发送机与接收机GPS时间同步电路，实现了多频激电仪接收机与发送机的精确时间同步进行高精度相位测量。
This radar use FMICW signals, time synchronization consists of pulse synchronization and frequency-modulation synchronization.
该雷达采用调频中断连续波(FMICW)信号，时间同步包括调制脉冲的同步和调制频率的同步。
Next, minimum mean square error (MMSE) filters are applied to the received signal to recover single user signal wave thus implementing user separation and frequency synchronization at the same time.
然后，对接收到的信号应用最小均方误差滤波恢复单用户信号波形，从而同时实现了多用户信号分离及频率同步；
Next, minimum mean square error (MMSE) filters are applied to the received signal to recover single user signal wave thus implementing user separation and frequency synchronization at the same time.
然后，对接收到的信号应用最小均方误差滤波恢复单用户信号波形，从而同时实现了多用户信号分离及频率同步；
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