The channel estimation algorithms for LTE downlink OFDMA system are introduced in detail.
针对LTE下行OFDMA传输系统介绍了信道估计技术。
In OFDMA systems, Inter-cell interference coordination is a promising approach to solve the problem.
在OFDMA系统中，小区间干扰协调是解决该问题的主流技术之一。
So this thesis is engaged in the research of channel estimation technology for LTE downlink OFDMA system.
因此本文将重点围绕LTE下行OFDMA系统的信道估计技术展开研究。
In OFDMA, closely spaced multiple subcarriers are assigned to different users for parallel data transmission.
在OFDMA中，相临的多个子载波被分配给不同的用户来为用户并行低速传输数据。
Link adaptation transmission is a vital technology for OFDMA system, and it has great effect on the performance.
链路自适应传输是正交频分多址系统关键技术，对提升系统性能起到关键作用。
The invention discloses a dynamic fractional frequency reuse method based on an OFDMA wireless cellular network.
本发明公开了一种基于OFDMA无线蜂窝网络的动态分数频率复用方法。
At last, we explained the MAC scheduling architecture in TDMA mode, and proposed a scheduling scheme in OFDMA mode.
最后介绍了TDMA模式下的MAC层调度实现框架，并指出OFDMA模式下可供参考的调度方案。
Compared with traditional single-user OFDM systems, synchronization technology for OFDMA system are more difficult.
相对于传统单用户的OFDM系统，OFDMA系统的同步技术遇到更大的困难。
OFDMA is based on the idea of frequency-division multiplexing, which is a method to transmit multiple data streams over a channel.
OFDMA是根据频分多路传输系统的思想，这是一种在一个频道上传输多个数据流的方法。
Therefore, this paper study and resolve when and how to allocate the up-down link time resource in TDD OFDMA wireless network.
因此，文中研究解决何时、怎样在时分双工OFDMA无线网络中进行上下行资源的分配。
A packet scheduling algorithm for mixed traffics was proposed in orthogonal frequency division multiple access (OFDMA) systems.
提出了一种基于正交频分多址接入系统的混合业务分组调度算法。
Recently, Orthogonal Frequency Division multiple access (OFDMA) as a new multiple access technology has received a lot of attention.
近年来，正交频分多址接入系统做为一种新的多址接入技术受到了极大关注。
To deal with this problem, in this paper, a novel joint power and subcarrier allocation scheme in uplink OFDMA systems is proposed based on game theory.
针对这一问题，该文提出了一种基于功率效率最优的联合子载波功率分配算法。
The biggest merit of OFDMA is the ability to resist frequency - selective fading, simultaneously can raise the frequency spectrum efficiency effectively.
OFDMA的最大的优点是能够抵抗频率选择性衰落，同时能够有效地提高频谱效率。
The combination of the advantages of VMIMO and OFDMA technique is suitable for the high data rate transmission for the next wireless communication systems.
将VMIMO和OFDMA技术的优势相结合，非常适合下一代无线通信系统对高速数据传输速率的要求。
The transmit power of a data channel, sent using a second radio technology (e. g. , OFDMA), is adjusted based on the transmit power of the reference channel.
基于所述参考信道的传输功率来调整使用第二无线电技术（例如，OFDMA）发送的数据信道的传输功率。
Therefore, the schemes of radio resource management in new generation wireless communication networks based on MIMO/OFDMA are researched in this dissertation.
为此，本论文研究基于OFDMA和MIMO技术的新一代无线通信网络中无线资源管理机制。
In case of single-cell OFDMA system, the study ranges from single user power allocation, multi-user subcarrier scheduling to joint subcarrier and power allocation.
并重点从功率分配和子载波调度方面对OFDMA系统的资源分配进行了研究和仿真。
A new semi-static interference coordination algorithm was proposed and have been simulated and verified. The OFDMA system level simulation platform was introduced.
在研究了多小区OFDMA系统资源分配的基础上，提出了一种新的半静态干扰协调算法并经过仿真验证。
Orthogonal Frequency Division Multiplex Access (OFDMA) is widely used for its characteristics of high data transmission rate and the flexibility of bandwidth allocation.
正交频分复用接入(OFDMA)具有传输速率高，带宽分配灵活等特点。
This paper focuses on carrier frequency offset estimation (CFO) and multiuser interference elimination in uplink OFDMA system based on generalized carrier assignment schemes.
本文针对上行链路任意分配子载波重点研究了载波频偏估计和多用户间干扰消除的方法。
A method to improve transmission efficiency at the edge of cellular OFDMA uplink is proposed, decreasing bit errors by sectors diversity and reducing the number of retransmission.
提供了一种提高蜂窝OFDMA小区边缘用户上行链路传输效率的方法，它利用小区内扇区分集提高误比特率性能，并利用小区间分组分集降低分组重传次数。
Second, considering the disadvantages of present handover algorithms, this paper proposes a new OFDMA handover algorithm: A Coverage-based Handover Algorithm for High-speed Data Service.
其次，本文针对以上切换算法的不足提出了新型的切换算法：基于覆盖延展的高速业务新型切换算法。
Finally the system simulation results show that the proposed algorithm is robust and time efficient, and it is very feasible for OFDMA cellular systems, especially IEEE 802.20 OFDMA systems.
最后的系统仿真结果表明，该算法具有较高的鲁棒性和搜索效率，是适合于IEEE 802.20及其它OFDMA蜂窝系统的高效下行捕获和同步算法。
Focusing on the resource allocation problem in multi-user orthogonal frequency division multiple access (OFDMA) systems, a multi-carrier proportional fair scheduling algorithm, G-PFS, is proposed.
采用遗传算法搜索子载波最优分配方案，对多用户正交频分复用多址接入(OFDMA)系统资源分配问题进行了研究，提出了一种多载波比例公平调度算法G - PFS。
Most of the current OFDMA resource allocation algorithms targets on the spectrum utilization improvement in single system without considering the resource sharing for multisystem in the same area.
现有的OFDMA资源分配算法大都以提高单系统内的频谱利用率为目标，而对于同一区域内多系统间的资源共享问题未加考虑。
Secondly, a novel downlink acquisition and synchronization algorithm for IEEE 802.20 OFDMA system is proposed. The algorithm is composed of downlink frame detection and sector PN code identification.
其次，本文提出一种针对IEEE 802.20 OFDMA工作模式的下行捕获和同步算法，该算法分为下行帧头检测和扇区标识值识别两个步骤。
The second chapter describes the basic principle of the conventional OFDM and establishes a downlink OFDMA system model, which is the basis for researching synchronization technology for OFDMA system.
在第二章介绍了传统OFDM的基本原理，并建立了OFDMA系统的下行链路模型，在此基础上研究OFDMA系统的同步技术。
The second chapter describes the basic principle of the conventional OFDM and establishes a downlink OFDMA system model, which is the basis for researching synchronization technology for OFDMA system.
在第二章介绍了传统OFDM的基本原理，并建立了OFDMA系统的下行链路模型，在此基础上研究OFDMA系统的同步技术。
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