In this paper, the techniques of the OFDM signal identification and adaptive OFDM scheme are studied.
本文主要研究了OFDM信号识别和OF D M自适应调制技术。
The key aspect of adaptive OFDM includes accurate channel estimation and efficient adaptive modulation schemes.
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 adaptive power allocation algorithm and modulation scheme for adaptive OFDM systems are studied subsequently.
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 performance of BER of the proposed SC-FDE system overcomes adaptive OFDM system with one bit per subcarrier CSI feedback in the same conditions.
与一比特信道状态信息回馈的自适应OFDM比较，自适应SC-FDE系统误码性能更好。
This thesis focuses on adaptive OFDM and adaptive SC-FDE with low feedback channel state information (CSI), that is, how to carry out adaptive transmission by using limited CSI.
本文研究了低回馈信道状态信息的自适应OFDM和SC - FDE系统，即利用有限的信道状态信息实现自适应传输。
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。
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。
The paper presents an efficient digital adaptive method compensating for nonlinear distortions caused by a high-power amplifier (HPA) in orthogonal frequency division multiplexing(OFDM) system.
本文提出了一种用于正交频分复用（OFDM）系统中由大功率放大器引起的非线性失真的有效的数字自适应补偿方法。
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。
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。
A novel adaptive channel estimation method for OFDM communication system is proposed.
提出了OFDM通信系统中一种新型自适应信道估计方法。
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。
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。
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。
Based on the adaptive antenna and OFDM technology, a new adaptive beamforming algorithm and the optimum array weight vector were obtained.
基于自适应天线与OFDM技术，提出一种新的自适应波束成形算法，获得了最佳的阵列加权系数。
For the OFDM system, a scheme of combining space-time code with the adaptive power control technology is proposed with simulation results, which increases the diversity gain and the adaptive gain.
对OFDM系统提出将空时编码与自适应功率控制技术相结合，给出了仿真结果，提高了分集增益和自适应增益。
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.
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。
We distribute proper bit and power for each spread branch by using adaptive allocation ideas in OFDM for reference.
该算法借鉴OFDM系统中自适应分配算法的思想，为各个扩频支路确定合适的比特数目和发射功率。
As to the simple monitoring environment of single user, this paper mainly analyzed and implemented adaptive modulation in MB-OFDM-UWB system.
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。
In this paper, a novel power allocation and adaptive modulation method is proposed on the basis of the combination of MIMO and OFDM technology.
本文在已知信道状态信息的前提下，将MIMO和OFDM技术相结合，提出了一种新的MIMO - OFDM系统的功率分配和自适应调制方法。
To improve system capacity and performance, MIMO, OFDM and adaptive transmission technology are broadly researched.
为了提高系统容量和性能，人们对MIMO技术、OFDM技术以及自适应传输技术展开了广泛的研究。
This thesis introduces the basic principle and key technologies of adaptive TCM based on OFDM system.
本文对OFDM中的自适应TCM的基本原理及其关键技术进行了分析。
M-OFDM system of adaptive bit load and power distribution, the running OFDM.
OFDM系统的自适应比特加载和功率分配程序，运行OFDM。
Furthermore, we propose an adaptive subcarrier re-allocation algorithm for the OFDM-based system. The algorithm could allocate all subcarriers flexibly by the greatest extent.
提出了基于OFDM系统的自适应子载波重分配算法，该算法能够最大程度地灵活分配所有子载波。
Furthermore, we propose an adaptive subcarrier re-allocation algorithm for the OFDM-based system. The algorithm could allocate all subcarriers flexibly by the greatest extent.
提出了基于OFDM系统的自适应子载波重分配算法，该算法能够最大程度地灵活分配所有子载波。
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