Carrier frequency offset is one of the key problems in OFDM system.
载波频率偏移是OFDM系统实现的关键问题之一。
Carrier frequency synchronization is one of the key techniques of OFDM system.
载波同步是正交频分复用系统的一项关键技术。
Bit and subcarrier dynamic allocation technique is one of the key techniques in OFDM.
比特和子载波动态分配技术是OFDM的关键技术之一。
It's important that how to manage resources to improve the OFDM systems 'performance.
在OFDM系统中，如何对系统资源进行有效的管理，对提高系统性能具有非常重要的作用。
One of biggest superiorities of OFDM is that it can do simple frequency domain equalize.
可以进行简单的频域均衡是OFDM最大的优势之一。
A scheme is presented for OFDM digital signal and am signal to transmit at the same band.
提出了一种将基于OFDM的数字信号和AM信号在同频带内传输的方案。
The OFDM software algorithm and physical implementation technique for powerline is developed.
本文给出了电力线OFDM 系统的软件算法和物理实现技术。
Next, LS scheme is also applied on the regular pilot tones which are inserted OFDM data symbol.
接下来，用LS估计插在OFDM数据符号中规则的导频符号。
But OFDM is very sensitive to synchronization error, especially the symbol synchronization error.
但是OFDM对同步误差十分敏感，特别是符号同步误差。
When the adaptive modulation is applied in the OFDM system, there are lots of problems to be solved.
本文围绕自适应调制技术在OFDM系统中的应用涉及的技术问题展开研究。
Channel estimation is the key technique to implement OFDM system, and is also the hotspot of research.
信道估计是实现OFDM系统的关键技术之一，也是目前研究热点。
The OFDM is sensitive to the synchronization of the OFDM symbol and the carriers' frequency excursion.
OFDM系统存在对数据符号同步和载波频率偏移极为敏感的问题。
For pulse shaping OFDM systems for doubly dispersive channels, such a setup is in general not optimal.
对于双弥散信道的OFDM系统，这种设计的脉冲成形一般不是最理想的。
OFDM can simplify the base-band processing unit of the receiver greatly and can increase the data rate.
OFDM可以使接收机中的基带处理单元大大简化，并且可以提高数据速率。
The timing synchronization algorithm of training symbols for the OFDM systems is an old timing algorithm.
OFDM系统的训练符号定时同步算法是一种传统的定时算法。
In this paper, the key techniques of OFDM systems, such as equalization and channel estimation are studied.
本文主要研究了OFDM的信道估计和均衡等关键技术。
In this thesis, we adopt the bandwidth-efficient OFDM system, which can adjust efficiency of bandwidth usage.
在本论文中，我们采用高频宽效率的正交分频多工调变系统。
A short introduction to the principle of OFDM and definition of PAPR, its statistical description are presented.
首先简要介绍了OFDM的原理，PAPR的定义及其统计描述。
This paper investigated the timing and frequency offset estimation algorithm of OFDM burst transmission systems.
本文研究OFDM分组传输系统的符号同步与频偏估计算法。
But OFDM is very sensitive to frequency offset and phase noise, so synchronization is the key problem for OFDM system.
但是OFDM技术对频率偏移和相位噪声很敏感，所以同步是OFDM系统中的关键问题。
One of the key problems in OFDM system design is that OFDM system has high requirements about carrier synchronization.
而OFDM系统设计中的难点之一就是OFDM系统对载波频率同步的精度要求特别高。
The effect of finite rate feedback in multiple-antenna OFDM systems on communication performance is discussed in this paper.
讨论了多发射天线OFDM系统中有限比率反馈对通信系统误码率的影响。
Though OFDM is an excellent broad band transmitting technique, it's weakness is fatal, that it is sensitive to error signals.
虽然OFDM是一种优良的宽带传输技术，但是它也存在致命的弱点，那就是它对误差比较敏感。
This paper presents two methods for time domain synchronization, a key problem of OFDM, and prospects the application of OFDM.
时域同步是OFDM系统中的关键问题，论述了时域同步的两种方法，并简要展望了OFDM的应用前景。
We propose new carrier frequency acquisition and channel estimation algorithms based on the time-domain analysis of OFDM system.
本文根据OFDM系统特点，分析了OFDM系统的时域载波频率捕获和信道估计方法。
OFDM is precisely because of its anti-interference capability features and become the core technology of wireless communications.
OFDM技术正是由于其抗干扰能力强的特点，成为了当今无线通讯的核心技术。
Why DSL can be called a wide band technology is because it exploits OFDM which represents Orthogonal Frequency Division Multiplexing.
DSL技术之所以能够被称为宽带技术，主要是由于它的复用方式是OFDM。
The tradeoff between performance and complexity must be taken into account in channels estimation algorithm of wireless OFDM systems.
无线OFDM系统中基于导频辅助的信道估计必须折衷考虑算法性能与算法复杂度。
As one of the most crucial technique of OFDM, synchronization technique includes carrier frequency synchronization and symbol synchronization.
同步技术是OFDM最关键的技术之一，它包括载波频率同步和符号同步。
As one of the most crucial technique of OFDM, synchronization technique includes carrier frequency synchronization and symbol synchronization.
同步技术是OFDM最关键的技术之一，它包括载波频率同步和符号同步。
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