然后利用最大似然原则得到频偏估计。
Also the frequency offset was estimated based on maximum likelihood (ML) principle.
该算法能够同时实现时间同步与频偏估计。
The time synchronization and carrier frequency offset estimation can be achieved simultaneously.
将跟踪到的频偏补偿后，提高了系统解调性能。
Demodulation performance of OFDM systems can be improved after CFO is compensated.
多普勒频偏一直是卫星通信中不可忽视的消极因素。
Doppler frequency offset is always the passive factor that cant be neglected in satellite communication.
研制的宽频偏线性压控晶体振荡器取得了较好的结果。
A developed linear VCXO with wide frequency deviation has acquired better results.
频偏跟踪是影响到OFDM系统性能的关键技术之一。
Frequency offset tracking is one of the key technologies that affect OFDM systems' performance.
提出一种针对多用户交织OFDM载频偏移估计的算法。
This paper proposes a carrier frequency offset estimation algorithm for interleaved multi-user OFDM.
本文研究OFDM分组传输系统的符号同步与频偏估计算法。
This paper investigated the timing and frequency offset estimation algorithm of OFDM burst transmission systems.
在卫星移动通信中，多普勒频偏是一个不能忽视的消极因素。
In satellite mobile communications, Doppler frequency offset is a negative factor that couldn't be neglected.
随着频偏的增大，自适应频率估计的偏差和方差也随之增大。
With frequency bias increasing, estimated bias and variance of adaptive frequency estimator (AFE) enlarge.
新算法可实现的最大载波频偏获取范围是整个信号带宽的一半。
The maximum acquisition range can be up to one half of overall signal bandwidth.
上行链路中的粗频偏及定时估计是多用户OFDM系统的关键技术之一。
The estimation of the coarse frequency offset and timing is one of the key technology in the uplink multiuser OFDM system.
分析了现有的基于循环前缀的最大似然估计算法及其对频偏估计的跟踪。
Secondly, The ML algorithm based on CP in being and its tracking performance are analyzed.
载波恢复中高精度的频偏检测与跟踪是高性能锁相位环路实现的必要条件。
High precise measuring and tracking of carrier frequency-deviation is necessary to the realization of a high performance phase locked loop in carrier recovery.
研究表明，新算法的性能基本不受载波频偏的影响，且具有很强的抗噪特性。
The study shows that the new algorithm is not affected by carrier frequency offset basically, and has strong characteristic of resisting noise.
本文还研究了参数统计方法在估计通信信号的载波频偏和码元速率中的应用。
This dissertation also does research on the application in estimation of communication signals' carrier offset and symbol rate with the parametric statistical method.
针对短波39音OFDM系统，提出了一种新型的符号同步和载波频偏估计方法。
A novel symbol synchronization and carrier frequency offset estimation method is presented for 39-tone OFDM systems.
本文给出了在环形光纤外腔光反馈之下半导体激光器频偏特性的小信号分析理论。
In this paper a complete small signal analysis for semiconductor laser frequency chirping in the presence of optical fiber ring feedback is presented.
研究表明，该算法既能在AWGN信道中也能在多径衰落信道中完成频偏跟踪工作。
The study shows that the algorithm can complete frequency offset tracking in AWGN channel and multipath fading channel.
结果表明刻蚀气体的组分和射频偏压对刻蚀速率有较大影响，而气体流量影响不大。
The results show that the etching rate depends strongly on plasma composition and the RF bias voltage, but rather weakly on the gas flow rate.
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。
The ways of estimating the frequency offset and Doppler spread width in WCDMA system are studied in this paper.
本文分析了数字锁相环路的寄生频偏，它是现代通讯系统中频率合成器的重要指标之一。
This paper gives an analysis of parasitic frequency deviation in the digital phase locked loop, which is one of the important specifications of modern communication systems.
但是，OFDM对载波频偏非常敏感，很小的载波频偏都会严重影响OFDM系统性能。
But because of the sensitivity to the carrier frequency-offset, very small frequency offset will destroy the performance of the OFDM system, badly.
理论分析和仿真表明该算法在保证估计精度的同时，可显著降低大频偏估计的计算复杂度。
Numerical analysis and simulations show that this algorithm reduces the computational complexity significantly for the estimation of large frequency offset while maintains a good performance.
本文主要研究适用于突发OFDM传输系统的同步技术，包括定时、频偏估计和信道估计。
The synchronization techniques for burst packet transmission mode OFDM systems is studied, including timing, frequency offset estimation and channel estimation.
提出一种适应于在加性高斯白噪声信道(AWGN)下遥测系统的多普勒频偏盲估计算法。
The blind estimation algorithm of Doppler frequency suitable for telemetry systems involving additional white Gaussian noise (AWGN) channels is proposed in this paper.
推导并分析了频偏、相偏对通信系统的影响，提出了一种新的基于伪频偏概念的载波恢复算法。
The influences of frequency offset and phase offset on communications are discussed, and then a novel algorithm for recovering the carrier based on the false frequency offset is presented.
提出了一种基于功率谱叠加的交织正交频分多址系统上行链路载波频偏和定时同步联合估计算法。
A joint blind estimation method based on spectrum overlap for uplink interleaved orthogonal frequency division multiple access carrier frequency offset and timing synchronization is proposed.
对于整数频偏估计，分析了一种基于序列自相关的算法，并将该算法推广应用到频率选择性信道中；
For integer frequency offset estimation, we analyze a sequence auto-correlation based algorithm, and extend the algorithm into frequency selective channel case.
为了减小正交频分复用系统受频率偏差的影响，在OFDM系统中设计了一种新的载波频偏估计算法。
To reduce the impact of carrier frequency offset in OFDM system, this thesis designs a new carrier frequency offset estimation scheme for OFDM system.
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