distortion n. 1.歪扭,扭曲。 2.【电学】(信号、波形等的)失真;【物理学】(透镜成像产生的)畸变;【医学】扭转,变形。 3.窜改,歪曲,曲解。 a gross distortion of the news 大肆歪曲的报道。 frequency distortion 【无线电】频率失真。 undergo a sudden distortion (脸等)突然变形。 adj. -al
modulation n. 调整,调节;(声调的)抑扬,变化;【音乐】转调,变调;【无线电】调制。 amplitude modulation 振幅调制,调幅。 frequency modulation 频率调制,调频。 overmodulation 过(度)调(制)。
Measurements of the electrical properties of transmitting tubes - methods of measuring the inter modulation distortion of a three tone signal 发射管电性能测试方法三音互调失真的测试方法
Measurements of the electrical properties of transmitting tubes - measuring methods of dual tone inter - modulation distortion of linear amplifier tubes 发射管电性能测试方法线性放大管双音互调失真的测试方法
For lfm signal , we demonstrate the method of employing hamming weighting , spectrum correcting and phase modulation distortion 对线性调频信号的旁瓣抑制介绍了经典海明窗加权处理方法、频谱修正以及相位预矫正几种方法。
Results are given for a series of two - tone inter - modulation distortion measurements . it is shown that a 25 db improvement in the inter - modulation margin can be achieved 实现了一个890 915mhz的功率放大器的前馈线性化试验,其双音法测试结果表明,放大器的线性度提高了约25db 。
Results are given for a series of two - tones inter - modulation distortion measurements and the im3 is 48dbc . it is shown that a 24db improvement in the inter - modulation margin can be achieved when the amplifier ’ s output is 49dbm . and the efficiency of the whole system is 27 . 8 % 经双音测试证明,本系统在输出总功率为49dbm时,三阶互调产物抑制比为48dbc ,较未加入线性化系统前改善了24dbc ,此时系统总效率为27 . 8 % 。
Second , based on the theory of synthetic discriminant function , several sub - reference images were synthesized to form the reference image base to realize rotation distortion - invariant recognition , which also solved the ill - problem of synthesizing a single reference image with the whole training distorted images and made the pose estimation easier . third , the phase - encoding and amplitude modulation distortion - invariant jtc for multi - target recognition were described 其次,论文采用综合识别函数方法构成子参考图像,建立参考图像库的方法解决了目标旋转畸变不变的识别问题,克服了由大量训练图像合成单幅参考图像时,高频信息损失严重的病态问题,并可实现对真实目标旋转姿态的估计。