电子与信息学报
電子與信息學報
전자여신식학보
JOURNAL OF ELECTRONICS & INFORMATION TECHNOLOGY
2013年
3期
32-36
,共5页
李风从%赵宜楠*%乔晓林
李風從%趙宜楠*%喬曉林
리풍종%조의남*%교효림
雷达系统%波形设计%无约束优化%旁瓣抑制%相位编码
雷達繫統%波形設計%無約束優化%徬瓣抑製%相位編碼
뢰체계통%파형설계%무약속우화%방판억제%상위편마
Radar system%Waveform design%Non-constrained optimization%Range sidelobe suppressing%Phase code
该文提出在特定的距离旁瓣区间具有极低相关幅值的恒模波形设计方法.该类波形可应用于具有发射自适应能力的雷达、声呐和通信系统,以抑制距离旁瓣遮蔽和多路径等干扰.该文使用0-1加权的积分旁瓣电平构造目标函数,将波形设计转化为无约束优化问题.针对目标函数的特点,基于功率谱拟合的思想提出了初始点选择算法,推导了目标函数梯度和Hessian矩阵的解析表达式,并利用子空间信赖域算法求解该优化问题,提高了优化过程的计算效率.计算机仿真表明,对于连续区间和多个离散点的距离旁瓣抑制,均能提供较好的效果.
該文提齣在特定的距離徬瓣區間具有極低相關幅值的恆模波形設計方法.該類波形可應用于具有髮射自適應能力的雷達、聲吶和通信繫統,以抑製距離徬瓣遮蔽和多路徑等榦擾.該文使用0-1加權的積分徬瓣電平構造目標函數,將波形設計轉化為無約束優化問題.針對目標函數的特點,基于功率譜擬閤的思想提齣瞭初始點選擇算法,推導瞭目標函數梯度和Hessian矩陣的解析錶達式,併利用子空間信賴域算法求解該優化問題,提高瞭優化過程的計算效率.計算機倣真錶明,對于連續區間和多箇離散點的距離徬瓣抑製,均能提供較好的效果.
해문제출재특정적거리방판구간구유겁저상관폭치적항모파형설계방법.해류파형가응용우구유발사자괄응능력적뢰체、성눌화통신계통,이억제거리방판차폐화다로경등간우.해문사용0-1가권적적분방판전평구조목표함수,장파형설계전화위무약속우화문제.침대목표함수적특점,기우공솔보의합적사상제출료초시점선택산법,추도료목표함수제도화Hessian구진적해석표체식,병이용자공간신뢰역산법구해해우화문제,제고료우화과정적계산효솔.계산궤방진표명,대우련속구간화다개리산점적거리방판억제,균능제공교호적효과.
A method of designing constant modulus waveforms with ultra-low range sidelobe in specified intervals is presented. This kind of waveform can be used in radar, sonar, and communication systems with transmit adaptivity to suppress range sidelobe masking and multipath interferences. The 0-1 weighted integrated sidelobe level is used to construct the objective function, and the waveform design issue is modeled as a non-constrained optimization issue. According to the characteristics of the objective function, an initial waveform design algorithm based on power spectrum approximation is proposed. The analytical forms of objective function gradient and the Hessian matrix are derived and the subspace trust region algorithm is used, thus the computation burden of solving this optimization issue is reduced. Finally, the numerical simulations demonstrate that the proposed method can suppress successive and discrete intervals of range sidelobes effectively.