查询词典 modulation

Two familiar link adaptation schemes, adaptive modulation and coding and automatic repeat request, are investigated in this paper.

自适应链路技术则是克服信道衰落提高链路性能的关键方案之一。

This model can provide the good base of adaptive modulation and coding and automatic repeat request as well as dynamic resource allocation.

首先分析了正交频分复用技术频域信道统计特性，说明了Nakagami-m分布能更好地描述衰落信道；然后针对高速移动及OFDM信号传输的特点，采用状态持续时间相等法建立了OFDM频域信道有限状态马尔可夫模型，分别给出了计算持续时间、状态门限及状态数、转移概率、状态差错率的一般方法及m=0.5\1\2典型值的闭式解，该模型能为自适应模型控制、混合自动重传请求 HARQ、动态资源分配等技术提供良好的基础。

Adaptive Modulation and Coding and Hybrid Automatic Repeat reQuest are two main link adaptation techniques. Along with the higher demands of data rate and quality of service, the system performance can be well improved by employing AMC and HARQ.

链路自适应技术能有效地提高数据传输速率和频谱利用率，是目前和未来移动通信系统的关键技术之一，自适应调制编码AMC和混合自动请求重传HARQ是其中两种主要的链路自适应技术。

The scheme is scheduled through combining multi-level adaptive modulation and coding with hybrid automatic repeat request protocol.

该方案利用自适应编码调制技术和混合自动重传技术交互协作，使发射端可以根据反馈的延时信息自适应调节调制模式，选择发射权以及自动重传数据。

The High Speed Uplink Packet Access technology includes Adaptive Modulation and Coding, Hybrid Automatic Repeat Request, and Node B fast scheduling. It also solves the problem of sharing the uplink channel resources for User Equipment.

为了改善上行性能，高速上行分组接入主要考虑的技术包括自适应调制编码、混合自动重传、节点B快速调度，以及用户终端如何共享上行信道资源，同时包括增加增强的媒体访问控制实体，对协议进行增强和优化。

The High Speed Uplink Packet Access technology includes Adaptive Modulation and Coding, Hybrid Automatic Repeat Request, and Node B fast scheduling. It also solves the problem of sharing the uplink channel resources for User Equipment. Moreover, it has Medium Access Control protocol entities (MAC-e and MAC-es) to enhance and optimize the protocol.

为了改善上行性能，高速上行分组接入主要考虑的技术包括自适应调制编码、混合自动重传、节点B快速调度，以及用户终端如何共享上行信道资源，同时包括增加增强的媒体访问控制实体，对协议进行增强和优化。

This paper proposes a non-linear adaptive filtering method based on analyzing the performance of the conventional adaptive methods in the cases of that the NBI can be modeled as a single tone,an autoregressive stochastic process or narrow band BPSK digital modulation signals.

在分析线性自适应滤波抑制单频干扰、自回归过程窄带干扰和窄带BPSK调制信号干扰的性能的基础上，提出了一种非线性自适应波抑制方法。

Moreover the effects of the modulation coefficient and axial magnetic field on the electronic conductance are researched by PIC simulation.

最后使用粒子模拟研究了电压调制系数和聚焦磁场对电子电导的影响。

Furthermore, the azimuth effect can affect the signal modulation and the performance of the tracking system.

此外，方位效应还会影响信号的调制和跟踪的性能。

A system and method for providing overvoltage protection during a pulse width modulation dimming of a liquid crystal display backlight inverter are provided.

提供了一种系统和方法，用于在液晶显示器背光反向器的脉宽调制调光期间提供过压保护。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。