采用平方环实现载波同步信号的提取。
载波同步是无线通信系统中的关键环节。
Carrier frequency estimation is a significant problem in wireless communication.
本文的研究重点在于码辅助载波同步算法。
This dissertation focused on code-aided carrier synchronization algorithm.
实测了载波同步误差对解调器性能的影响。
The effect of the carrier phase error on the demodulator is actually measured.
可以认为该算法是一种高效的载波同步算法。
The algorithm can therefore be considered as an efficient carrier synchronization algorithm.
载波同步是正交频分复用系统的一项关键技术。
Carrier frequency synchronization is one of the key techniques of OFDM system.
数字传输系统的关键在于载波同步和信道均衡。
The key of digital transmission system lies in carrier synchronization and channel equalization.
第四章研究了载波同步和盲均衡的协同设计技术。
Chapter 4 investigates the joint carrier recovery and blind equalization technology.
设计了一种用于通信系统载波同步的新数字锁相环。
A novel all-digital phase locked loop (PLL), applied to the carrier synchronization of communication systems, is designed.
载波同步通常采用一种闭环反馈回路来对载波相位进行跟踪。
Carrier synchronization is implemented by a kind of closed loop with degenerative feedback.
第六章主要介绍了定时同步算法及高阶调制中的载波同步算法。
In chapter 6, it introduces the algorithm of timing recovery and the carrier recovery algorithm in the application of high QAM modulation.
多普勒频移补偿：大的多普勒频移会引起载波同步及伪码捕获性能的下降。
Doppler compensation techniques: the large Doppler frequency offset can case the performance degraded in PN and carrier synchronizing.
OFDM系统基本上有三类同步方式：符号定时同步、载波同步、采样钟同步。
There are three kinds of synchronal modes in OFDM system: symbol timing synchronization, carrier synchronization, sampling-bell synchronization.
载波同步是PS K信号相干解调中的一项关键技术，它直接关系到解调的指标。
Carrier synchronization is a key technique in the coherent -demodulation of PSK signals and it is directly related to the specification of demodulation.
时钟同步和载波同步是接收机的关键问题，传统模拟解调可靠性、稳定性差，调试复杂。
Time synchronization and carrier synchronization are cruxes of receiver. The reliability and stability of traditional analog demodulation are bad, and adjustment is complex.
估计并补偿频偏是为了实现载波同步，估计符号率和校正定时误差是为了实现码元同步。
Estimating and compensating carrier frequency offset are to achieve carrier frequency synchronization. Estimating symbol rate and correcting timing error are used to synchronize symbol.
针对这一问题，该文将OQPSK信号的平方谱与载波同步环路相结合设计了改进算法。
To resolve this problem, this paper designs an improved algorithm based on the power spectrum of OQPSK signal and the feedback structure.
本文对这两个特征下载波同步的两个方面——载波频率参数估计与环路参数设计进行了分析。
The estimation of carrier frequency and design of loop parameters are analyzed in this thesis when the two characteristics are considered.
最后给出了一种用FPGA与DSP组成的硬件平台实现软件无线电接收机载波同步环路的方案。
Finally, the paper gives out a scheme of digitized carrier synchronization loop for software defined radio receiver which is based on the hardware platform composed of FPGA and DSP.
文章介绍了HSP50210的主要性能特点和基本工作原理，重点分析了他的载波同步环及码元同步环。
It emphatically analyses carrier synchronization loop and code synchronization loop of HSP50210, and presents its application in software radio system.
有关OFDM的关键技术，如载波同步、信道估计、相位噪声等，在理论和实践方面均取得了很显著的成果。
Significant results in the key technologies of OFDM, such as carrier synchronization, channel estimation, phase noise and so on have achieved in theory and practice.
本论文的主要工作是针对OFDM和MIMO - OFDM系统中的载波同步理论和分集同步方法的研究。
In this dissertation, research work mainly focus on theory and technique of carrier frequency synchronization in MIMO-OFDM systems with diversities.
重点研究载波同步方法，设计电路及参数，仿真同步性能，并在现场可编程门阵列(FPGA)上实现同步电路。
We focus on the carrier synchronization method, the circuit and its parameters design, the performance simulation and the circuit implementation in Field Programmable Gate Array (FPGA).
针对极低信噪比高动态条件下载波同步问题，采用锁频环（FLL）和锁相环（PLL）相结合的方法来实现载波跟踪。
To the question of Carrier Synchronization with low signal-to-noise ratio (SNR) and High Dynamic , using the method of combining FLL with PLL to actualize the carrier tracking.
第四章在FPGA平台上实现载波同步单元电路，并给出了实现后的FPGA资源消耗、寄存器传输逻辑(rtl)原理图。
In chapter 4, the circuit of the carrier synchronization unit is implemented on FPGA, the Resistor Transistor Logic (RTL) schemes are presented.
对环路中的各部件参数等进行了设计与仿真，建立了环路的动态仿真模型，验证了算法的正确性，并且得到了数字化载波同步环路设计的一些经验值。
Then we validate the algorithm's correctness by establishing a dynamic simulation model of the loop, in which we obtained some experiential values of certain parameters.
该方法使用了时频同步跟踪环路，从数据子载波提取相位误差，并利用频域插值补偿多个用户的估计频偏。
The system uses time-frequency tracking loops to extract phase errors from data subcarriers with frequency interpolation to compensate for the estimated carrier frequency offsets.
由于该系统降低了每个子载波上的数据速率，扩频序列更容易同步。
Furthermore, this system lowers the data rate of each carrier branch, so it is easier to make PN sequence synchronized.
色同步信号是为了在接收端恢复与发送端被抑制掉的色副载波同频同相的载波而设置的。
Color synchronous signal is setup to resume subcarrier color signal as same frequency and phase in receive end, which is suppressed in send end.
色同步信号是为了在接收端恢复与发送端被抑制掉的色副载波同频同相的载波而设置的。
Color synchronous signal is setup to resume subcarrier color signal as same frequency and phase in receive end, which is suppressed in send end.
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