TWTA ( Traveling-wave tube amplifier) is one of the most important HPA components in satellite communication system. The nonlinear feature of TWTA results in the creation of intermodulation, which can cause intermodulation distortion, adjacent channel interference, and affects the performances of communication system.

This paper discusses three types of interference: spurious emission, intermodulation and block distortion. It also innovates fractional frequency reuse from physical layer and data link layer.

本文讨论了三种主要的干扰类型&杂散干扰、互调干扰和阻塞干扰，并结合物理层与数据链路层对规避干扰的分数频率复用法进行了创新。

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It is pointed out that the intermodulation distortion and gain compression of SIT are mainly caused by the nonlinearity of transconductance G_m, then by those of gate-source capacitance C_ ( gs) and drain conductance G_d in order.

指出引起SIT互调失真和增益压缩的主要原因是跨导G m的非线性，其次是栅源电容C（gs）的非线性变化和漏电导G d的非线性变化的作用。

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Moreover, it can transmit data at a high speed in the frequency selective fading channel. However, one problem of OFDM lies in the big Peak-to-Average Power Ratio ( PAPR), which leads to intermodulation distortion of OFDM signals and degradation of systematic functions.

然而，OFDM系统中最主要的问题之一在于OFDM信号的峰值平均功率比（PAPR）很大，容易导致OFDM信号的交调失真和系统性能的下降，这就限制了OFDM技术的广泛应用。

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Based on the analytic expressions of the IM products, intermodulation distortion ( IMD) sweet-spot and its dependencies on Taylor series coefficients, gate bias, drain bias, temperature, input signal levels and loads are analyzed.

根据二阶和三阶互调失真表达式，分析了互调失真抵消效应及其对泰勒级数系数的本征依赖性和对栅极偏置、漏极偏置、工作温度、输入信号功率大小及负载阻抗的外部依赖性。

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The intermodulation distortion and SNR of both the conventional Intensity Modulation ( IM) system and a novel Standing Wave Acousto-Optical Modulation ( SWAOM) system were demonstrated theoretically and experimentally in this paper.

本文从理论与实验上论证了光纤通讯光强调制（IM）和新型驻波声光调制（SWAOM）系统中的互调制信号失真与畸变以及信噪比。

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The waveform distortion is caused by the nonlinearity of the amplifier circuit, so it is often called as nonlinearity distortion. The nonlinearity distortion also include harmonic distortion and intermodulation distortion.

波形失真又称非线性失真，它是由放大电路的非线性引起的，非线性失真又包括谐波失真和互调失真。

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With the widely development of high power and multi-channel communication systems, intermodulation distortion created by passive devices can not be neglected anymore, it makes serious influence on capacity and quality of communication systems.

随着大功率、多信道无线通信系统的广泛应用，系统中无源器件产生的互调失真已变得不可忽视，严重影响了通信系统容量和质量。

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The AM-AM and the AM-PM bring distortion, which will cause intermodulation distortion. So that the adjacent channel will has a certain degree of interference.

对功率放大器来讲，AM-AM、AM-PM特性带来的失真会造成互调失真，从而使得相邻信道受到一定程度的干扰。

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The dissertation also shows some methods used for charactering nonlinearity of devices, such as AM-AM, AM-PM, Intermodulation Distortion and Third-order Intercept Point.

同时也介绍一些表征器件非线性特性的方法，如AM-AM、AM-PM、交调失真以及三阶截交点等理论。

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Because CDMA, OFDM signal is made up of the hundreds and thousands signals, the signal has nonconstant envelope, the amplifier results in intermodulation distortion products.

由于CDMA、OFDM信号等由数百个、数千个载波信号组成，它们的信号具有非恒定的包络，放大器产生互调失真。

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The advantage of class A2, AB2, or B2 is the complete lack of" blocking distortion", or transient intermodulation distortion.

的优势，一流的素A2，AB2型，或B2是完全没有“阻断失真”，或瞬态互调失真。

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Adopting Volterra-series, we analyzed the intermodulation distortion and gain compression behaviors of a SIT microwave power amplifier, in which three main nonlinear sources are included.

采用Volterra级数法，分析了包含三种主要非线性源的SIT微波功放的互调失真和增益压缩特性。

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Meantime this modified polynomial predistortion is implemented in the design of the PAs. And the simulation results show good performance in the reduction of the intermodulation distortion.

同时，还将改进后的多项式预失真技术应用于功放设计中并进行了仿真，仿真结果显示改进后的RLS多项式预失真算法对交调失真的抑制依然有非常好的效果。

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Modulated signals with varying envelop will generate intermodulation distortion which can not be eliminated by filter when those signal pass the RF power amplifiers.

由于这些线性调制技术具有非恒定包络的特点，当调制信号通过射频功率放大器后将产生互调信号失真，而这种互调产物无法用滤波去除。

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The SPEC-4 actually had lower total harmonic distortion and lower intermodulation distortion than its more expensive brother.

在SPEC-4实际上有较低的总谐波失真低于其更昂贵的兄弟互调失真。

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Project research and implement about troubleshooting intermodulation distortion of Wushan station in Jing-Guang microwave wireless line

消除京广微波干线乌山站互调干扰的方案研究与实施

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Intermodulation Distortion of TV Signal in Band-Limited FM Channels

电视信号通过带限调频信道后的互调失真

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The intermodulation distortion and envelope domain characterization technology are very important concepts of LSNA technology.

而互调失真表征技术和包络域表征技术是其中非常重要的概念。

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How to cancel carrier and detect the intermodulation distortion signal of power amplifier will be discussed.

探讨如何进行射频载波抵消以及检测放大器互调失真信号。

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IDENTIFICATION OF DISTURBANCE OF DIGITAL DEFORMATION OBSERVATIONS Intermodulation Distortion Character Identify

数字化形变观测干扰识别

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