adjacent channel interference

Reflection and scattering of ultrashort wave from stray Es ionosphere may probably arise co & channel or adjacent channel interference not only in wave band of TV I , but also in FM .

Es杂散电离层对超短波的反射和散射传播，不仅在电视Ⅰ波段，而且在调频波段都有可能产生同、邻频干扰。

In order to realize practice-oriented initialization , selection , crossover , mutation and adjustment processes , we take advantage of the genetic algorithms to encode cells and their frequency needs and use adjacent channel interference between cells as a fitness function .

本文中遗传算法对小区及其频点需求进行编码，以小区之间同邻频干扰和作为适应度函数，实现了面向实际应用的初始化、选择、交叉、变异和调整等过程。

The tests show that , adjacent channel interference has been greatly improved .

经测试表明，邻信道干扰有较大的改善。

An Efficient Simulator for Satellite Communications with Adjacent Channel Interference

有旁频干扰的数字卫星通信系统计算机模拟程序的一些技巧

The mathematical models of co-channel , adjacent channel interference among the duplex mobile communication systems

双工移动通信系统间的同波道、邻道干扰模型

Research on First Adjacent Channel Interference in FM IBOC DAB

FMIBOCDAB系统第一邻频道干扰研究

The notch filter proposed is used to attenuate the adjacent channel interference in the Loran-C receiver .

本文设计的陷波器用于衰减罗兰C接收机的邻道干扰，而且其调谐是在微机管理下处自动进行的。

The elimination of the adjacent channel interference solves the problem which is inevitable in actual application of the transient detecting method .

将这一方法应用于瞬态检测实验系统，取得了预期的效果，解决了瞬态检测理论在实际应用中所遇到的关键问题。

In the wireless communication systems , the nonlinearity of high power amplifier ( HPA ) cause spectral spreading and adjacent channel interference .

在无线通信系统中，高功率放大器因其具有非线性特性，会导致频谱再生和邻道干扰等问题。

Firstly , in the research of adjacent channel interference from the LTE system to the digital broadcasting television system , an improved simulation method is proposed .

首先，在LTE系统干扰数字广播电视系统的仿真研究中，本文提出了一种改进型仿真方法。

RF power amplifiers is a indispensable module in modern communication systems , its inherent nonlinear characteristics would lead to signal distortion and adjacent channel interference .

射频功率放大器是现代通信系统中不可缺少的重要模块，其固有的非线性特性会导致信号失真与邻道干扰。

Adjacent channel interference when two or more carrier channels are placed too close together in the frequency spectrum , they interfere with each other and mess up each other 's conversations .

邻道干扰频谱中，当两个或两个以上的载波信道相隔太近，他们将互相干扰并影响对方信道的会话。

As one of the strongest nonlinear devices , power amplifiers affect the communication systems directly , whose nonlinear distortions result in spectrum expansion and adjacent channel interference , then worsen the bit error rate .

功率放大器（PA）是通信系统中非线性最强的器件之一，其非线性失真将导致频谱扩展而干扰邻道信号并恶化误码率。

Since the envelope of modulated signal fluctuates , unwanted intermodulation distortions generated when the signal is amplified by the nonlinear RF power amplifiers . The intermodulation distortions will lead to severely inter-symbol interference and adjacent channel interference .

但包络变化的调制信号经过非线性射频功率放大器后会产生互调失真，造成严重的码间干扰及邻近信道干扰。

For implement of wide band modulation , multi-carries and elimination of adjacent channel interference to satisfy BER requirement in WCDMA system , which is most popular in 3G technology , the linearity requirement of the base station power amplifier becomes tighter . index ;

以WCDMA为代表的第三代移动通信技术，为实现宽带调制、多载波应用，同时减小邻信道干扰以满足通信系统的误码率要求，对基站发射机功放的线性指标要求苛刻。

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 .

行波管功率放大器（TWTA）是卫星通信星载系统中重要的高功放元件，TWTA的非线性特性会使多载波信号产生交调成份，导致交调失真、邻道干扰，影响通信系统的性能。