Here, we introduce OFDM technology.
在此，我们引入OFDM技术。
Synchronization is basic technology of OFDM system.
同步是OFDM系统的基本技术。
This paper presents a low-voltage PLC system based on OFDM.
这篇文章介绍了一种基于OFDM的低压电力线载波通信系统。
Recently, MIMO-OFDM technology has become a research hotspot.
目前，MIMO - OFDM技术已成为国内外研究热点。
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。
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。
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。
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。
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。
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 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。
Then, the phase estimator can further determine the phase of frequency response of OFDM channel.
此后，相位估计机可以进一步对OFDM信道的相频响应进行估计。
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。
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 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。
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。
Finally, this dissertation proposes a low complexity adaptive modulation scheme for VBLAST-OFDM system.
最后，提出了一种低复杂度的VBLAST - OFDM系统自适应调制方案。
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。
A new frame synchronization scheme in orthogonal frequency-division multiplexing (OFDM) system was proposed.
提出了正交频分复用(OFDM)系统中一种新的帧同步算法。
In this paper, subcarrier pair selection and power allocation in broadband OFDM relaying system is addressed.
该文研究宽带OFDM中继系统的最优中继子载波对选择和功率分配。
The maximum Doppler frequency shift is an important parameter which affects the performance of the OFDM system.
在OFDM系统中，影响其性能的一个重要参数就是最大多普勒频移。
By using new DSTBC in OFDM communications system channel estimation is nto necessary and coding gain is gotten.
通过在OFDM通信系统中应用新型差分空时分组码（DSTBC），获得编码增益，无需信道估计。
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。
Orthogonal frequency division multiplexing (OFDM) is a new modulation method for broadband mobile communications.
正交频分复用(OFDM)是为宽带移动通信而提出的新型调制技术。
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。
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