OFDM systems can work in either continuous mode or burst mode.
OFDM系统可分为连续工作模式和突发工作模式。
Demodulation performance of OFDM systems can be improved after CFO is compensated.
将跟踪到的频偏补偿后，提高了系统解调性能。
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。
A channel estimation method for OFDM systems using rectangular pilot pattern was proposed.
提出一种使用矩形导频图案的OFDM信道估计方法。
The methods propose to utilize the zero padding prefix(ZP) characteristic of ZP-OFDM systems.
提出一种在零前缀正交频分复用（ZP-OFDM）系统中，估计符号定时和载波频偏的算法。
Frequency offset tracking is one of the key technologies that affect OFDM systems' performance.
频偏跟踪是影响到OFDM系统性能的关键技术之一。
In this paper, a new frequency and symbol synchronization algorithm for OFDM systems is proposed.
提出了一种正交频分复用(OFDM)系统的频率和时间同步算法。
A new technique is proposed to cancel the clipping noise on pilot symbols for clipped OFDM systems.
本文针对限幅OFDM系统，提出一种基于导引符号的限幅噪声消除算法。
Capacity of the MIMO-OFDM systems using both space diversity and polarization diversity was analyzed.
结合空间分集和极化分集，对MIMO - OFDM系统中的容量进行研究。
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。
The rules can effectively use multi-user diversity to improve V-BLAST/OFDM systems' performance greatly.
该准则可以有效地利用多用户分集，明显提高V-BLAST/OFDM系统的整体性能。
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。
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。
Synchronization and channel estimation are two key techniques for OFDM systems to ensure its good performance.
为保证其具有好的性能，需要时频同步、信道估计等一系列的关键技术加以支持。
A combined channel estimation method of time-frequency-selective fading channels in MIMO-OFDM systems was proposed.
提出了一种适用于时间频率选择性衰落信道的MIMO - OFDM系统的组合信道估计方法。
A novel symbol synchronization and carrier frequency offset estimation method is presented for 39-tone OFDM systems.
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。
At present, the channel estimation of wireless OFDM systems has been still in the progress of research and exploring.
目前，对于无线OFDM系统的信道估计方法仍处于研究和探索阶段。
This thesis mainly focuses on the time-varying channel estimation methods based on pilot tones in wireless OFDM systems.
本文主要研究了无线OFDM系统中基于导频的时变信道估计方法。
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。
The basic thought is to apply the existing blind source separation (BSS) algorithm to the signal detection in MIMO-OFDM systems.
基本思想是将现有的盲信源分离算法(BSS)应用到MIMO - OFDM系统的信号检测中。
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。
Time-domain equalizer (TEQ) is an effective technique to combat ISI caused by inadequate circular prefix (CP) length in OFDM systems.
在OFDM系统中，时域均衡器用来抵消因循环前缀长度不足而引起的码间串扰。
Based on the key technology research in B3G-TDD systems, Link Adaptation in multi-user OFDM systems are researched in this dissertation.
本文建立在本实验室B3G - TDD系统研究的基础上，主要研究多用户OFDM系统中的链路自适应技术。
On the other hand, adaptive modulation technique can enhance data rate, spectrum efficiency and transmission reliability in MIMO-OFDM systems.
另一方面，对于MIMO - OFDM系统来说，自适应调制技术可以提高系统的数据传输率、频谱效率以及传输的可靠性。
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。
An improved LMS Algorithm is presented in this paper, based on which there is a semi-blind adaptive equalizer of time-variant channel for OFDM systems.
提出了一种改进的LMS算法，使基于该算法的半盲自适应信道均衡器适用于时变信道中OFDM系统。
A Synchronization method and apparatus for the OFDM systems includes three portions of delay conjugate multiplication, phase processing, and edge detection.
一种正交分频多工系统之同步方法与装置，主要包含延迟共轭相乘、相位处理，以及边界侦测三个部分。
In practical OFDM systems, virtual subcarriers are usually used to avoid the transmitted data being distorted by the low-pass filter on the transmitter side.
实际的OFDM系统通常会使用虚拟子载波，以此来避免发送信号受到发送端成形低通滤波器的影响。
This dissertation is concerned with channel estimation in both OFDM and MIMO-OFDM wireless communication systems and adaptive modulation in MIMO-OFDM systems.
本文研究了OFDM和MIMO-OFDM无线通信系统的信道估计技术以及MIMO-OFDM系统的自适应调制技术。
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