讨论宽带无线tdma系统中采用的自适应调制技术。
This paper discusses adaptive modulation techniques for TDMA high capacity wireless TDMA communications systems.
自适应调制技术是移动宽带通信系统的核心技术之一。
Adaptive modulation technology is one of the crucial techniques for the mobile broadband systems.
提出了自适应调制技术的多用户MIMO系统的多用户分集。
An adaptive modulation technique for multiuser MIMO systems with multiuser diversity is proposed.
本论文的工作主要是分块传输系统中的自适应调制算法的研究。
Most work in the thesis focus on the research of adaptive modulation algorithms.
自适应调制能提高系统的频谱利用率和改善系统的误码率性能。
Adaptive modulation can improve the system performance with high spectral efficiency.
其次研究了自适应OFDM系统的功率分配及自适应调制算法。
The adaptive power allocation algorithm and modulation scheme for adaptive OFDM systems are studied subsequently.
本文研究了通过改变符号率及调制电平的方法实现的自适应调制系统。
In this paper, an adaptive modulation system controlled by changing the symbol rate and modulation level is proposed.
利用删除卷积码实现自适应调制编码是解决上述问题的一个关键技术。
Adaptive modulation and coding by using convolutional codes is a key technology to solve the above problem.
本文主要研究了OFDM信号识别和OF D M自适应调制技术。
In this paper, the techniques of the OFDM signal identification and adaptive OFDM scheme are studied.
最后，自适应调制被施加到所选择的用户的基础上的BER约束各子信道。
Finally, adaptive modulation is applied to each sub-channel of the selected user based on the BER constraint.
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。
When the adaptive modulation is applied in the OFDM system, there are lots of problems to be solved.
准确的信道估计和高效的自适应调制方案是自适应OFDM技术的两个关键。
The key aspect of adaptive OFDM includes accurate channel estimation and efficient adaptive modulation schemes.
最后，提出了一种低复杂度的VBLAST - OFDM系统自适应调制方案。
Finally, this dissertation proposes a low complexity adaptive modulation scheme for VBLAST-OFDM system.
对其中的关键技术：干扰辨识、自适应调制策略和信道质量估计进行了详细的讨论。
The key technology in it, such as interference discrimination, self-adaptive modulation strategy and channel quality estimation are discussed in this paper particularly.
本文主要研究自适应调制技术的基础：信道估计技术、MQAM信噪比误比特率性能。
This letter mainly deals with the base of adaptive modulating technique: Channel estimation technology and the signal to noise ratio vs. error bit rate performance of MQAM.
仿真表明，自适应调制泄漏法在网络处于劣化模式和非劣化模式时都可以有效地抑制指针调整抖动。
Simulations show that adaptively modulated bit leaking method can reduce the jitter in pointer adjustment effectively in both the normal mode and the degraded mode of SDH network.
针对简单的单用户监测情况，分析并实现了单用户MB - OFDM - UW B自适应调制系统。
As to the simple monitoring environment of single user, this paper mainly analyzed and implemented adaptive modulation in MB-OFDM-UWB system.
仿真结果表明，自适应调制系统可以获得较高的数据吞吐量，而其传输中断率在一定条件下可以保持较低的水平。
Finally, the simulation results show that the adaptive modulation system can theoretically achieve high throughput performance, and low transmission outage probability under certain conditions.
针对全球微波接入互操作性系统中自适应调制编码子载波分配方式，该文提出一种基于多用户分集的资源分配算法。
This paper proposed a resource allocation algorithm based on multiuser diversity based on the subcarrier allocation of adaptive modulation and coding.
移动终端的速度对有效的切换、高效的动态信道分配、自适应调制、功率控制、均衡等无线应用都是必不可少的信息。
The knowledge of the velocity of the mobile terminals is essential in adequate handoff control, efficient dynamic channel assignment, adaptive modulation, power control, equalization, etc.
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。
This dissertation is concerned with channel estimation in both OFDM and MIMO-OFDM wireless communication systems and adaptive modulation in MIMO-OFDM systems.
该模型支持采用自适应调制和编码(AMC)的多速率非理想信道，而AMC在无线网络中是增加有效传输率的关键技术。
The model supports the multi-rate non-ideal channel using adaptive modulation and coding (AMC), which is the key feature in the wireless networks to increase the effective transmission rate.
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。
On the other hand, adaptive modulation technique can enhance data rate, spectrum efficiency and transmission reliability in MIMO-OFDM systems.
最优信号子空间的思想是SC - FDE中设计自适应调制算法的根本基础，在此基础上又提出了序列最优信号子空间的概念。
Optimal signal subspace is the foundation for our adaptive modulation algorithms in SC-FDE. Another new concept is introduced called sequenced optimal signal subspaces.
在此基础上，本文重点研究了LTE中的链路自适应方案，对自适应调制编码（AMC）技术以及混合ARQ算法进行了系统仿真。
This article mainly investigated the link adaptation schemes of LTE system based on this simulation platform, and simulated adaptive modulation and coding (AMC) and Hybrid ARQ schemes in the platform.
但由于其符号映射和检测在时域完成，因此在SC -FDE系统中利用信道状态信息来完成自适应调制，并不像OFDM那样直接。
But SC-FDE cannot finish adaptive modulation utilizing CSI directly like OFDM due to it has to make symbol mapping and detecting in time domain.
从这一点出发，多元正交幅度调制(MQAM)、多载波调制(MCM)及自适应调制技术成为下一代移动无线系统中最有竞争力的几种候选技术。
From this point, M-ary Quadrature Amplitude modulation (MQAM), MultiCarrier modulation (MCM) and adaptive modulation techniques are good candidates in next generation mobile radio system.
实验结果表明，所提出的空频二维自适应调制算法可以在保证系统目标传输速率和目标误比特率的前提下，进一步减小系统所需要的平均发射功率。
The simulation results show that the proposed algorithm can reduce the overall transmission power further while the target transmission rate and bit error rate are met.
实验结果表明，所提出的空频二维自适应调制算法可以在保证系统目标传输速率和目标误比特率的前提下，进一步减小系统所需要的平均发射功率。
The simulation results show that the proposed algorithm can reduce the overall transmission power further while the target transmission rate and bit error rate are met.
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