| 伪码-线性调频复合信号的参数估计 |
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| 引用本文： | 刘勇,张国毅,胡鑫磊.伪码-线性调频复合信号的参数估计[J].航天电子对抗,2014(4):22-25. |
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| 作者姓名： | 刘勇 张国毅 胡鑫磊 |
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| 作者单位： | 空军航空大学信息对抗系,吉林长春130022 |
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| 摘 要： | 针对伪码随机二相编码-线性调频复合信号的参数估计问题,提出了基于解线调与相位差分的盲估计方法。首先对信号进行平方,消除相位调制,然后用解线调估计出调频斜率,用重构的线性调频信号消除复合信号中的线性调频成分,用平滑的功率谱估计出起始频率,最后采用改进的相位差分进行码元宽度的估计与伪码序列的恢复。仿真结果验证了方法的有效性。
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| 关 键 词： | 伪码随机二相编码-线性调频(PRBC-LFM) 解线调 相位差分 |
Parameter estimation of reconnaissance signal combined PN and LFM |
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| Liu Yong,Zhang Guoyi,Hu Xinlei.Parameter estimation of reconnaissance signal combined PN and LFM[J].Aerospace Electronic Warfare,2014(4):22-25. |
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| Authors: | Liu Yong Zhang Guoyi Hu Xinlei |
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| Institution: | (Department of Information Countermeasures ,Aviation University of Air Force, Changehun 130022 ,Jilin, China) |
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| Abstract: | A parameter estimation algorithm is proposed to blindly estimate reconnaissance signal combined PRBC and LFM,based on dechirp and phase difference.Firstly,the square of the received signal is computed to eliminate the phase modulation.Then,dechirp is adopted to obtain chirp rate which is used to reconstruct signal to eliminate the LFM portion of received signal.And then,the initial frequency is estimated by smoothing the power spectrum.Finally,improved phase difference is used to estimate the width of the symbol and recover the pseudo-code sequence.The results of simulation show the effectiveness of this algorithm. |
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| Keywords: | pseudo-random binary phase code and linear frequency modulation dechirp phase difference |
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