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.
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.
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).
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.
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…
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.
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.
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