CAJ | 학술논문

正交多相码信号在雷达组网作战和合成孔径雷达抗欺骗干扰中有着重要的作用.提出了一种新的采用超混沌序列产生正交多相编码信号的设计方案.根据雷达系统的性能需求,给出了超混沌序列的相关性优选方法,首次指出求解互相关序列最大集是一个最大团问题,并结合实际给出一种简洁高效的最大团求解算法.仿真结果表明,超混沌正交多相码满足独立同分布,较常规混沌编码复杂度更高(均在1.2以上),码序列众多,经多脉冲相干积累后旁瓣较Frank码有近10 dB的改善.适合于在组网雷达系统和抗干扰环境中的应用.
정교다상마신호재뢰체조망작전화합성공경뢰체항기편간우중유착중요적작용.제출료일충신적채용초혼돈서렬산생정교다상편마신호적설계방안.근거뢰체계통적성능수구,급출료초혼돈서렬적상관성우선방법,수차지출구해호상관서렬최대집시일개최대단문제,병결합실제급출일충간길고효적최대단구해산법.방진결과표명,초혼돈정교다상마만족독립동분포,교상규혼돈편마복잡도경고(균재1.2이상),마서렬음다,경다맥충상간적루후방판교Frank마유근10 dB적개선.괄합우재조망뢰체계통화항간우배경중적응용.
Orthogonal polyphase code signal plays a very important role in netted combat radar system and the electronic counter-countermeasures (ECCM) of synthetic aperture radar (SAR). A new design scheme of generating the signal was proposed using hyper chaotic sequences. Based on the requirement of radar performance, some methods on optimizing the correlation properties of hyper chaotic sequences were introduced, in which that solving the maximal set of cross-correlation is a maximum clique prob-lem was pointed out for the first time and its simple but effective solving method was put forward. The simulated results show that the signal accords with independent identical distribution, has higher com-plexity than conventional chaotic sequences (larger than 1.2), and provides a large number of code se-quences, what's more, the sidelobe level of it is 10 dB lower than that of Frank polyphase code after the coherent accumulation of pulses, which is suitable in netted radar system and ECCM environment.