基于三角多项式拟合的RCS数据实现研究
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摘要
为了利用实测的RCS数据对回波脉冲进行幅度调制产生逼真的雷达目标回波,采用正交多项式拟合及三角多项式拟合法将提取RCS数据拟合成为一个多项式函数或包含正余弦的三角函数,运用CORDIC算法使这些数据集成于DSP等芯片用于回波幅度调制,最后应用Matlab软件对2种拟合方法从数值和直方图进行仿真比较.仿真结果表明:三角多项式拟合方法能高精度地拟合RCS数据,对RCS数据的硬件实现及雷达目标回波模拟有一定的参考价值.
In order to simulate the radar target echoes more approaching to the reality by implementing the amplitude modulation of echo pulses with the field-measured RCS data,this paper is to extract the RCS data,fit them into a polynomial function or the sine or cosine trigonometric functions using the methods of orthogonal polynomial fitting and trigonometric polynomial fitting,and integrate them into the DSP and other chips using the CORDIC algorithm,used for echo amplitude modulation.Finally,simulation is performed by Matlab,for the comparison of those two fitting methods in terms of their values and histograms.It is shown that the trigonometric polynomial fitting method can fit the RCS data more accurately,which can be a certain reference for the hardware implementation of RCS data and simulation of radar target echoes.
In order to simulate the radar target echoes more approaching to the reality by implementing the amplitude modulation of echo pulses with the field-measured RCS data,this paper is to extract the RCS data,fit them into a polynomial function or the sine or cosine trigonometric functions using the methods of orthogonal polynomial fitting and trigonometric polynomial fitting,and integrate them into the DSP and other chips using the CORDIC algorithm,used for echo amplitude modulation.Finally,simulation is performed by Matlab,for the comparison of those two fitting methods in terms of their values and histograms.It is shown that the trigonometric polynomial fitting method can fit the RCS data more accurately,which can be a certain reference for the hardware implementation of RCS data and simulation of radar target echoes.
引文
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[2]鲍庆龙,湛蓝,陈曾平.基于实测数据的宽带雷达回波半实物仿真方法[J].航天电子对抗,2009,25(2):45-47.
[3]秦敬喜,胡磊,周剑雄,等.基于三维散射中心模型的一维距离像识别[J].雷达科学与技术,2009,7(1):46-51.
[4]马士超,王贞格.基于DSP的三角函数快速计算[J].计算机工程,2005,31(22):12-14.
[5]黄培康,殷红成,徐小剑.雷达目标特性[M].北京:电子工业出版社,2005:68-78.
[6]彭引,李坤琼.正交多项式拟合法[J].重庆职业技术学院学报,2007,16(5):158-159.
[7]陈晓江,黄樟灿.数值分析[M].北京:科学出版社,2010:51-56.
[8]李庆扬,王能超,易大义.数值分析[M].北京:清华大学出版社,2008:68-72.
[9]陈振勋,辛小龙,贺瑞缠.三角多项式拟合方法与地震数据分析[J].应用科学技术,2010(9):118-119.
[2]鲍庆龙,湛蓝,陈曾平.基于实测数据的宽带雷达回波半实物仿真方法[J].航天电子对抗,2009,25(2):45-47.
[3]秦敬喜,胡磊,周剑雄,等.基于三维散射中心模型的一维距离像识别[J].雷达科学与技术,2009,7(1):46-51.
[4]马士超,王贞格.基于DSP的三角函数快速计算[J].计算机工程,2005,31(22):12-14.
[5]黄培康,殷红成,徐小剑.雷达目标特性[M].北京:电子工业出版社,2005:68-78.
[6]彭引,李坤琼.正交多项式拟合法[J].重庆职业技术学院学报,2007,16(5):158-159.
[7]陈晓江,黄樟灿.数值分析[M].北京:科学出版社,2010:51-56.
[8]李庆扬,王能超,易大义.数值分析[M].北京:清华大学出版社,2008:68-72.
[9]陈振勋,辛小龙,贺瑞缠.三角多项式拟合方法与地震数据分析[J].应用科学技术,2010(9):118-119.
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