carrier-free meaning in English
无载流子的，无载波的
无载体的, 不含载体的
Examples
- The main mission of this subject is to research and accomplish a digital signal process algorithm of carrier - free pulse ground penetrating radar ( gpr )
本课题的任务是无载频脉冲探地雷达信号处理算法的研究与实现。 - What i have done in this subject include : 1 . consult the reference about gpr and appreciate the general theory of gpr ; 2 . analyze the signal model of carrier - free pulse ground penetrating radar and the feature of each part of radar echo data
本人的主要工作包括： 1 .查阅探地雷达资料，了解探地雷达基本原理； 2 .分析无载频脉冲探地雷达回波数据信号模型及各信号分量特征； 3 .研究并完成信号处理算法，即杂波抑制和合成孔径处理两部分算法； 4 .实测数据进行仿真，验证算法效果并分析仿真结果。 - The potential applications of amr include both civil and military communication , especially non - cooperative communications and communication confrontation , such as identifying signals , supervising signals , distinguishing interference , electronic confrontation , analyzing military threat , etc . on the basis of our analysis to the existing research on feature abstraction , the related feature abstraction methods are optimized in this paper , resulting several effective methods such as the feature abstraction based on transformation domain , stepped voltage level analysis , normalized carrier - free spectral energy analysis , squared signal and fourth powered signal analysis , etc . both the decision theory based on recognition algorithms and the artificial neural network ( ann ) based on recognition algorithms is analyzed , and the former is selected as it is more appropriate for this research
调制类型的自动识别广泛应用于民用通信与军用通信，尤其是对于非合作性通信、通信对抗，比如：信号确认、信号监控、干扰辨识、电子对抗、软件无线电、电子救援、通信对抗、军事威胁分析等。本论文在分析现有研究的基础上，借鉴了已有的特征提取方法，对相关调制类型特征提取方法进行了优化，使用了一些有效的方法，如基于变换域特征提取方法、梯层电平分析方法、剔除载波后的归一化频域能量分析方法、信号平方后的频谱分析方法、信号四次方后的频谱分析方法等。通过对基于决策理论和基于人工神经网络两种识别算法进行分析，本论文选择了较适合的基于决策理论的识别算法。 - The novel vertical carrier - free linear cluster system phoebus for the economical deposition of amorphous and microcrystalline silicon light absorbers by pecvd ideally combines the strengths of proven vacuum production platforms to precisely focus on the needs of solar cell producers : process stability , productivity , yield , footprint , costs of ownership
新的立式无载体线团系统”菲波斯” ( phoebus ) ,以pecvd方法经济地镀膜无定形的和微晶硅吸光体,理想地结合各种证明可靠的真空生产平台的优点来精确的聚焦于满足太阳能电池生产者的需求:工艺的稳定性,生产效率,合格产量率,占地面积和拥有运营的总成本