Modulation format of signal has become a key technique to enhance the transmission capability of system in the long-distance system. 在超长距离传输时,信号调制格式是可提高系统传输性能的一项关键技术。
By applying the chaos mapping into the UWB-IR was applied and proposed a novel module for chaos modulation and demodulation was proposed, which enhances both the capability of anti-detecting and the capability of anti-intercepting of the UWB-IR. 通过将混沌映射应用于UWB-IR,并提出了一种新的混沌编解码模块,进一步增强了UWB-IR的抗检测能力和抗截获能力。
As a multiplexing spectrum modulation technique, Hadamard transform ( HT) provides three~ advantages: the capability of multiplexing simultaneous detection, the ability of multiplexing imaging and the suitability of data transformation. 阿达玛变换(HT)作为一种多通道光谱调制技术,具有多通道同时检测能力、多通道成像能力以及适用于数据处理等优点。
All kinds of amplitude modulation capability if one signal is carrier wave and the other is modulation wave; 如果把其中一路作为载波信号,另一路作为调制波,就能实现各种各样的调幅波;
The results show that these factors significantly affect the cathode emission characteristics and its modulation capability and that they are of technological interest in FED optimization. 计算结果显示阴极发射特性和栅极调制能力与上述电参数和结构参数关系密切,从而为优化设计这种显示器件提供了方向。
Fluid pulse code modulation ( PCM) and pulse-width modulation ( PWM), owing to their structural simplicity, operational reliability and strong anti-interference capability, have become a choice of priority in the direct control of hydraulic or pneumatic pressure systems by computers. 流体脉码调制(PCM)与脉宽调制(PWM)数字控制技术,因具有结构简单、工作可靠和抗干扰能力强等优点,已成为计算机直接控制液压或气压系统的重要选择方式。
Our research group had made a practical sample of analyzer, MDA-1. Now more research and development for Modulation Domain Pulse Analyzer ( MDPA-1) which is higher capability than MDA-1 are going on. 本教研室在成功地研制出了第一代调制域分析仪实用化样机MDA-1的基础上,进一步开发和研制了性能更加完善的商业样机调制域脉冲分析仪MDPA-1。
The technology of modulation and demodulation is the key of the Software Radio system and it determines the capability of the system. 而调制解调技术在软件无线电系统中占据着非常重要的地位,它的优劣决定了系统的性能,是软件无线电的关键所在。
It has the advantages of fine frequency resolution, short frequency conversion time, wide modulation bandwidth and controlling facility, and has capability of generating the different waveforms. 它具有频率分辨率高(可达uHz)、频率转换时间短(可达ns)、输出频率带宽很宽、程控灵活等优点,并具有产生多种常用波形的能力。
This paper presents computer simulation models of amplitude modulation ( AM) noise of radar transmitter leakage and phase modulation ( PM) noise of clutter in main lobe, it gives a analysis of the effect of LO AM/ PM noise to the capability of radar detector. 分析了本振调相、调幅噪声对相参雷达系统探测性能的影响,给出了主杂波环境下雷达发射机调相噪声以及发射机泄漏的调幅噪声的数字仿真模型。
With frequency and phase modulation capability; 具有频率、相位的调制能力;
Due to low amplitude fluctuation and excellent frequency and amplitude modulation capability, diode lasers have been excellent light sources for investigating absorption spectra of atoms and molecules especially in the wavelength region of the near infrared, which coincides with most atomic and molecular transitions. 由于半导体激光器功率稳定、波长连续可调,尤其在近红外波段,其波长覆盖了大多数原子/分子的跃迁谱线,因此半导体激光器已成为原子/分子吸收光谱测量中的一种很好的光源。
Space Time Coding combining diversity, coding and modulation, can effectively resist multipath fading in the channel and improve the capability of the system, so it will probably become the key technology of the 3rd generation of mobile communication system. 空时编码技术综合考虑分集、编码和调制,能有效对抗信道中的多径衰落和提高系统容量,必将成为第三代移动通信系统中的关键技术。
The new modulation format is one of the key technologies of 40Gb/ s system because of its capability in mitigating transmission impairments. 新型调制格式可有效抑制传输损伤的影响,因此成为40Gb/s系统的关键技术之一。
The algorithm takes advantages of the anti-fading capabilities in both OFDM and star-QAM modulation and demodulation, and provide valuable information and for further studying the potential capability in higher-order modulation-demodulation anti-fading technologies and theories. 3. 我们的算法将OFDM和星型QAM调制解调技术的抗多径衰落能力融合在一起,为进一步挖掘高阶调制解调抗衰落的潜力提供了理论依据。
The code modulation formats, as one of the key technologies studied in high-speed optical fiber communication systems, can effectively reduce the transmission impairments, enhance the anti-dispersion and anti-nonlinear-effect capability and improve the transmission performance and spectrum efficiency. 码型调制格式作为高速光传输系统研究的关键技术之一,可以有效地降低传输系统的传输损伤,提高系统的抗色散能力和抗非线性效应能力,改善高速光通信系统的传输性能和频谱效率。
The system adopts FSK signal as modulation and DFT as demodulation. And the capability of noise rejection of DFT is discussed. 本系统采用频移键控,用作DFT的方式解调,本文对抗噪性能进行了分析。
Due to high power factor, sinusoidal alternating current and energy with the capability of bidirectional transmission, a pulse width modulation ( PWM) rectifier has become a major development trend of rectifier. 脉冲宽频调制PWM(Pulsewidthmodulation)整流器以功率因数高、网侧电流正弦化、能量可双向传输,已成为整流器发展的必然趋势。
A variety of modern modulation/ demodulation techniques are seeking stable capability of high-speed rate to satisfy the urgent requirement of vast communication data in the digital era of information. 在数字化时代对巨大信息量传输的迫切需求下,各种现代调制解调技术都在追求可靠的高速数据传输。
Compared to traditional light sources, LEDs not only have less power consumption, longer life, smaller size, better for environmental protection, but also possess advantages of shorter response time and much better modulation capability. 与传统照明光源相比,LED光源不仅功耗低、尺寸小、使用寿命长、绿色环保,更具有响应时间短、调制性能好等优点。
However, high transmission rate would cause damage on the quality of the signal, such as dispersion, non-linear effects and so on. Advanced modulation format is one of the key technologies of 40Gbit/ s system because of its capability in mitigating transmission impairments. 但是,随着传输速率的提升,系统的色散、非线性效应等问题对信号的影响也更加严重。高级光调制格式可以有效地抑制这些传输损伤的影响,成为40Gbit/s系统的关键技术之一。
Spread spectrum communication ( SSC) is superior-performance modulation theories and new technology, which is to improve the reliability of the information transmission. As its biggest characteristic is strong anti-jamming capability, it is widely used in military anti-jamming communication and mobile communications. 扩频通信能有效地提高信息传输的可靠性,它是一种性能优越的调制技术,最大的特点是抗干扰能力强,广泛应用于军事抗干扰通信以及移动通信中。