These hindered the widespread use of OFDM system more prospects.
这些阻碍了OFDM系统更加广泛的运用前景。
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。
Joint ML block semi-blind channel estimation is applied to OFDM system.
将联合最大似然分组半盲估计算法应用于正交频分复用系统。
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。
One of the major drawbacks of the OFDM system is the high peak-to-average power ration (PAPR).
正交频分复用(OFDM)系统的一个主要缺点是峰均功率比(PAPR)过高。
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。
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。
An adaptive subcarrier allocation algorithm for multiuser OSTBC-OFDM system is discussed in this paper.
研究了基于正交空时分组码的多用户OFDM系统的自适应子载波分配算法。
Channel estimation is researched for OFDM system in low-voltage power line communication in this paper.
本文主要研究基于OFDM的低压电力线通信信道估计算法。
The main contents of the paper are some channel estimation and equalization methods in MIMO-OFDM system.
本文研究的主要内容是MIMO-OFDM系统的信道估计和均衡技术。
This paper mainly conducts research on the application of LDPC-OFDM system in wireless data transmission.
本文研究了LDPC - OFDM系统用于无线数据传输中的具体实现问题。
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。
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。
In this way, the ICI and "error floor" in traditional OFDM system are removed, and the performance is enhanced.
该接收技术可以有效去除传统的OFDM系统中的载波间干扰，消除误码的地板效应，提高了系统性能。
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。
On the base of analysis of power line channel and OFDM system, research is focused on the channel estimation algorithm.
在对电力线和OFDM系统分析的基础上，重点研究了信道估计算法。
The estimation of the coarse frequency offset and timing is one of the key technology in the uplink multiuser OFDM system.
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。
Allocation of antennas and subcarriers is one of most important issue for multiuser MIMO-OFDM system radio resource management.
天线与子载波分配是多用户MIMO - OFDM系统无线资源管理中的重要内容。
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。
The paper researches the base station testing technology and analyses the MIMO-OFDM system theory and LTE base station testing items.
因此开展MIMO-OFDM的基站测试系统研究具有重要的理论意义和实用价值。
In view of orthogonality between subcarriers of OFDM system, effect of the finite order of digit shaping filter is discussed in this paper.
从OFDM系统子载波正交性要求出发，讨论了数字成形滤波器阶数有限效应。
Study shows the simplified implementation scheme is applicable in hardware implementation of MIMO-OFDM system timing synchronization algorithm.
研究表明，简化实现方案可以用于MIMO - OFDM系统定时同步算法的硬件实现。
There are three kinds of synchronal modes in OFDM system: symbol timing synchronization, carrier synchronization, sampling-bell synchronization.
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。
An optimization algorithm for impulsive noise mitigation in OFDM system is proposed based on the analysis of output SNR of blanking nonlinearity.
该文在消隐非线性输出snr分析的基础上，提出了OFDM系统脉冲噪声处理的阈值优化算法。
But because of the sensitivity to the carrier frequency-offset, very small frequency offset will destroy the performance of the OFDM system, badly.
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。
To reduce the impact of carrier frequency offset in OFDM system, this thesis designs a new carrier frequency offset estimation scheme for OFDM system.
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。
The OFDM system has a major disadvantage that high peak to average power ratio (PAPR) can cause nonlinear distortion in the high power amplifier (HPA).
OFDM系统的一个主要缺陷就是峰平比过高引起的高功率放大器(HPA)的非线性失真。
Based on the multiuser OFDM system model and the user fairness, this paper designed the objective function of the adaptive resource allocation problem.
通过对多用户OFDM系统模型的分析，结合对用户公平性的考虑，给出了该系统中自适应资源分配问题的目标函数。
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