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1)  pointed single frequency modulation jamming
指向性单音干扰
1.
Based on of analyzing the principle of QPSK modulation and demodulation,the BERs of three jamming modes used for QPSK are theoretically derived,and these three modes include the continuous noise jamming,single frequency modulation jamming and pointed single frequency modulation jamming.
由于四相位绝对移相键控(QPSK)的调制方式在卫星通信中占有十分重要的地位,详细的分析了QPSK信号的调制与解调原理,并以此为基础,理论推导出用于QPSK干扰的3种干扰方式的误比特率(BER),这三种方式包括:连续噪声干扰,单音干扰以及指向性单音干扰
2)  single tone interference
单音干扰
1.
Performance analysis of delay lock loop in coherent spread-spectrum system with single tone interference;
单音干扰下相干扩频系统早迟门延迟锁定环路性能分析
2.
The new algorithm can not only suppress the single tone interference but also depress the system noise,so it can provide the DSSS system with higher performance gain than the linear prediction algorithm.
该算法在抑制单音干扰的同时降低了噪声对系统性能的影响,因此与线性预测算法相比这一算法为DSSS系统提供了更高的性能增益。
3)  single-tone jamming
单音干扰
1.
The current analysis focuses on the performance of BPSK modulation on 2-dimensional spread spectrum system with single-tone jamming.
针对二进制相移键控调制的二维扩频系统,分析了其抗单音干扰的性能。
4)  single tone jamming
单音干扰
1.
A novel scheme for accurate estimation of single tone jammingparameters in a multi-carrier spread spectrum system;
一种精确估计多载波扩频系统中单音干扰参数的新方法
2.
A novel single tone jamming elimination scheme for multi-carrier spread spectrum system;
多载波扩频系统中单音干扰抵消的新方法
5)  rejecting single-tone jamming
抗单音干扰
1.
A new space-time Rake MMSE receiver based on antenna diversity is proposed and its performance for rejecting single-tone jamming analyzed in this paper.
分析了一种新型的基于天线分集的空时 Rake MMSE接收机在多径衰落信道条件下的抗单音干扰性能。
6)  strong single-frequency-interfere
抗强单音干扰
1.
Techniques of the strong single-frequency-interfere in extremely Low SNR short-wave can offer special anti-single wave interfere technique in condition of bad electromagnetism, finite frequency band and incapable of spread-spectrum technique, to make sure the short-wave can transmit an emergency communication.
短波极低信噪比条件下抗强单音干扰是在极其恶劣的电磁环境下,频带资源有限,扩频技术无能为力时,提供特定的抗单音干扰技术,为保证短波应急通信基本作战信息传递提供前提。
补充资料:指向性


指向性


  物理学术语。发射(或接收)某一频率声波的声源(或声接收器)在其远场中的发射声压(或接收灵敏度)的方向特性。常用指向性图表示。指向性是声源在远场形成波束的方向特性,也是声接收器对入射声波的方向选择特性。它与声源(或接收器)的工作表面形状、大小和声波波长有关。换能器阵列的指向性还与各换能器阵元的振幅、相位有关。在声波束形成和接收指向性形成中,进行最优化设计是声学工程的重要内容之一。
  
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