实测结果表明,这种无变压器环形相位调制器能较好地抑制载波。
The test result indicates that the phase modulator without transformer can suppress the carrier wave.
偶次分谐波混频可有效地抑制载波泄漏、二次混频失真及本振噪声,是提高调制器精确度及直接解调器动态范围的有效技术。
In this paper, we discuss even subharmonic mixing technique which can suppress carrier leakage in microwave direct modulator, or suppress IM2…
振幅调制分为4种方式:AM(普通调幅)、DSB(抑制载波双边带调幅)、SSB(单边带调幅)、VSB(残留边带调幅)。
Amplitude modulation is divided into 4 ways: am (amplitude), DSB (bilateral with carrier suppression modulation), SSB (single sideband modulation), VSB (VSB).
色同步信号是为了在接收端恢复与发送端被抑制掉的色副载波同频同相的载波而设置的。
Color synchronous signal is setup to resume subcarrier color signal as same frequency and phase in receive end, which is suppressed in send end.
这可保证,每一路混响器得到相同直流水平的基带信号,并获得最好的载波抑制。
This ensures that the baseband signals will reach each mixer with the same DC reference, yielding the best carrier suppression.
文中探讨几种载波泄漏抑制技术,简述其工作原理,并提供实例。
In this paper, we discuss some carrier-leakage suppression techniques, theories and present some design examples.
提出了一种改进的光载波抑制产生光毫米波的方法。
A novel scheme for optical millimeter (mm)-wave generation with optical carrier suppression(OCS) modulation by external modulator in a radio-over-fiber (ROF) system was proposed.
与传统的光学相位差放大方法相比,数字法相位差放大对实验装置要求较低,并且具有易于抑制噪声、载波因子可调等优点。
The method does not need an excellent test setup, and is more easy than conventional optics methods to restrain noise and adjust carrier parameter.
然后采用对基带信号的数字预补偿方法来抑制镜像频率和载波泄漏,从而达到应用的目的。
Then we perform digital pre-compensation method, which can be used in the processing of base band signal to reject image frequency and protect carrier leak to meet the application purpose.
该方法利用DFT迭代算法来重构虚载波的频域信道状态信息,通过时域滤波方法来抑制噪声。
The channel status information was reconstructed by the new algorithm according to a DFT iterative algorithm. Then the channel noise was suppressed by time domain filter methods.
该文考虑空时分组码多载波码分多址(MC-CDMA)系统的盲干扰抑制。
This paper considers blind interference suppression for a space-time block coded MultiCarrier CDMA (MC-CDMA) system.
由于发射器的载波泄漏会对线性度造成影响,论文提出了使用7位电流型DAC来校正上调制器的输出直流失调来提高载波抑制。
To prevent the carrier leakage caused by DC-offset, the 7-bits DAC is inserted to cancel this dc-offset.
子载波调制矢量包括信息元分量和抑制元分量。
The modulating vectors for the subcarriers consist of the information-bearing components and the reduction components.
其思路是将信号先通过单边带调制,将较低频率调制到需要的频率范围;然后采用对基带信号的数字预补偿方法来抑制镜像频率和载波泄漏,从而达到应用的目的。
Then we perform digital pre-compensation method, which can be used in the processing of base band signal to reject image frequency and protect carrier leak to meet the application purpose.
在GPS信号中载波是完全抑制的,尽管接收的GPS频谱中不含载波分量,但它是能够恢复的。
The carrier component presented in GPS signal is completely suppressed. Even though the spectrum of the received GPS signal does not contain a carrier component, it is possible to reconstruct one.
在GPS信号中载波是完全抑制的,尽管接收的GPS频谱中不含载波分量,但它是能够恢复的。
The carrier component presented in GPS signal is completely suppressed. Even though the spectrum of the received GPS signal does not contain a carrier component, it is possible to reconstruct one.
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