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首页> 外文期刊>Electrical Engineers - Part III: Radio and Communication Engineering, Journal of the Institution of >Non-Linear Distortion in Transmission Systems
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Non-Linear Distortion in Transmission Systems

机译：传输系统中的非线性失真

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The problem of the distortion noise generated by a signal in its transmission through one or more non-linear devices is analysed. This subject has become of increasing importance in connection with the development of the transmission of different types of signals on a multi-channel basis through a common network, e.g. modulator, amplifier or transmitter. The provision of such networks is now of frequent occurrence, and in order that economic and satisfactory designs may be obtained it is essential to be able to determine precisely the effect of non-linearity and also the limiting linearity requirements, preferably in a form which can be readily comprehended and applied by designers. The problem has been considered to be very complex, and existing literature is both scanty and involved. This paper presents a simple solution, which is capable, in general, of immediate application to any type of complex signal (e.g. speech, music, television, voice-frequency telegraphy or thermal noise) covering any frequency band or frequency allocation. The results are presented to the designer in the form of the limiting levels of the various harmonics of a single tone, which levels must not be exceeded if the noise power from the non-linear device in any specified frequency band is not to exceed a predetermined value. The differences in the linearity requirements of a single amplifier and of a repeatered system are demonstrated. Provided the input/output characteristic of the network can be expressed as a single-valued power series independent of the frequency in the working band, the results obtained should cover with adequate accuracy the design of all types of transmission systems.
机译：分析了信号在通过一个或多个非线性设备传输时产生的失真噪声问题。与通过公共网络（例如，无线网络）以多信道为基础发展不同类型的信号的传输相关的主题变得越来越重要。调制器，放大器或发射机。现在经常提供这种网络，并且为了获得经济和令人满意的设计，至关重要的是能够精确地确定非线性的影响以及极限线性要求，优选地以能够容易被设计师理解和应用。该问题被认为是非常复杂的，并且现有文献既少又涉及。本文提出了一种简单的解决方案，该解决方案通常能够立即应用于覆盖任何频带或频率分配的任何类型的复杂信号（例如语音，音乐，电视，语音电报或热噪声）。结果以单一音调的各种谐波的极限电平的形式呈现给设计者，如果非线性设备在任何指定频带内的噪声功率不超过预定值，则不得超过该极限电平值。演示了单个放大器和转发器系统线性要求的差异。如果网络的输入/输出特性可以表示为与工作频带中的频率无关的单值功率序列，则获得的结果应足够准确地涵盖所有类型的传输系统的设计。

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