一种改进的Smart AGC扩频干扰抑制技术  

Improved Smart AGC Interference Suppression in Spectrum Spreading

作　　者：赖平[1] 陆锐敏 沈俊 马世旺[1] 

机构地区：[1]解放军理工大学通信工程学院 [2]南京电讯技术研究所 [3]海军92261部队

出　　处：《现代军事通信》2014年第1期27-30,共4页

摘　　要：针对现有SmartAGC干扰抑制技术对噪声和杂波干扰处理能力不足，对强干扰信号检测跟踪不准的缺点，文中提出一种改进的SmartAGC扩频干扰抑制技术。该技术在包络检波模块中，利用分段三次Hermite插值多项式拟合曲线法获取原始信号包络，其包络比用希尔伯特变换法得到的更加平滑，并通过包络滤波算法对信号进行修正，消除幅度噪声和杂波干扰带来的影响。仿真结果表明改进的SmartAGC技术用于直接序列扩频系统可以明显提高系统抗干扰的性能。Due to the poor capacity to reduce noise and clutter waveforms, present Smart AGC interference suppression technology used in spectrum spreading can＇t exactly detect or track strong interference. To solve these problems, an improved Smart AGC technology is proposed. In the module of envelope detec- tion, we use a polynomial curve fitting method of piecewise cubic Hermite interpolation to get the original signal＇s envelopes, which is much smoother than the Hilbert transform method. Then we modify the sig- nal＇s envelopes through envelope filtering algorithm to remove the impacts of range noise and clutter wave- forms. Simulation result shows that DSSS combined with improved Smart AGC can significantly improve the performance of anti-jamming in the system.

关 键 词：SMART AGC 包络检波 HERMITE插值 直接序列扩频 干扰抑制 

分 类 号：TN914.42[电子电信—通信与信息系统]