CAJ | 학술논문

直接序列扩频信号具有低功率谱密度发射的隐蔽性、抗干扰能力强、低检测率等特点，因此对直扩信号进行干扰将非常困难。为达到良好的干扰效果，必须保证干扰信号经接收机解扩后的干扰功率足够大。针对直扩系统扩频码本身的特点，建立了数学模型，从理论上推算出在干扰信号输入功率一定的情况下，接收机末端干扰信号输出功率与相对带宽的关系，即存在一个最佳相对带宽，使得干扰信号输出功率最大，进而保证了最优干扰效果。
직접서렬확빈신호구유저공솔보밀도발사적은폐성、항간우능력강、저검측솔등특점，인차대직확신호진행간우장비상곤난。위체도량호적간우효과，필수보증간우신호경접수궤해확후적간우공솔족구대。침대직확계통확빈마본신적특점，건립료수학모형，종이론상추산출재간우신호수입공솔일정적정황하，접수궤말단간우신호수출공솔여상대대관적관계，즉존재일개최가상대대관，사득간우신호수출공솔최대，진이보증료최우간우효과。
The jamming implementation is difficult for Direct-Sequence Spread-Spectrum ( DSSS) signal because of its character-istics such as low-power spectrum density transmission invisibility,high anti-jamming capability,low probability of detection (LPD), etc.In order to realize better jamming effect,it must ensure that the power of jamming signal de-spreaded by receiver is high enough. Based on the characteristics of the spread-spectrum code of DSSS system,this paper builds a math model,and calculates the relation be-tween the output power of signal at the end of receiver and relative bandwidth under a certain input power of jamming signal.This is to say,there is an optimal relative bandwidth,which makes the highest output power of jamming signal,and can ensure an optimal jamming effect.