基于单比特FFT的Ka频段测控系统抗干扰方法  

Anti-interference Method for Ka-band TT&C System Based on Single-bit FFT

作　　者：谭志鹏 金松坡[1] 刘宇 王鹏毅[1] TAN Zhipeng;JIN Songpo;LIU Yu;WANG Pengyi(The 54 th Research Institute of China Electronics Technology Group Corp.,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第54研究所,石家庄050081

出　　处：《计算机测量与控制》2025年第4期57-66,共10页Computer Measurement &Control

基　　金：国家自然科学基金(U22B200288)。

摘　　要：天基信息是获取战场情报的重要来源,为了保证数据快速落地,地面测控设备正朝着机动化、小型化方向发展;针对Ka频段测控系统抗窄带干扰消耗资源大、运算复杂的问题,提出一种基于单比特运算的抗干扰算法;首先,该算法采用单比特量化采样和单比特FFT运算,减小了FFT过程中运算量;其次,该算法对运算过程中的旋转因子进行量化投影,进一步简化了单比特FFT的运算过程,使算法可以通过单比特数加减运算实现;最后,时频联合进行处理,根据干扰频点和强度确定适合的陷波器消除干扰;通过性能仿真和样机验证,证明该算法与传统频域抗干扰算法相比,在保证抗干扰性能的同时,硬件资源消耗量大幅减少,有效减少了抗干扰过程的资源消耗和运算复杂度。Space-based information is an important source for obtaining battlefield intelligence.To ensure rapid data delivery,ground tracking and control equipment is developing towards motorization and miniaturization.In response to the high resource consumption and complex computations of Ka-band tracking and control systems in resisting narrowband interference,an anti-interference algorithm based on single-bit operations is proposed.Firstly,this algorithm employs single-bit quantization sampling and single-bit FFT operations,reducing computational complexity during FFT process.Secondly,it quantifies the projection of rotation factors during operation process,further simplifying single-bit FFT operation,and implementing the algorithm through addition and subtraction of single-bit.Finally,this algorithm performs time-frequency domain joint processing,and determines appropriate notch filter based on interference frequency and intensity to eliminate interference.Through performance simulation and prototype verification,it is demonstrated that compared with traditional frequency-domain anti-interference algorithms,this algorithm significantly reduces hardware resource consumption while maintaining anti-interference performance,effectively reducing resource consumption and computational complexity during anti-interference process.

关 键 词：KA频段 时频结合 噪声加扰 单比特FFT 旋转因子量化 

分 类 号：TP802.6[自动化与计算机技术—检测技术与自动化装置]