Journal of Northwestern Polytechnical University Apr. Vol No.2 TBD 张鹏, 张林让针对高脉冲重复频率雷达高速运动弱小目标检测的距离模糊问题, 提出了一种基于动态规划的检测前跟踪

Size: px

Start display at page:

Download "Journal of Northwestern Polytechnical University Apr. Vol No.2 TBD 张鹏, 张林让针对高脉冲重复频率雷达高速运动弱小目标检测的距离模糊问题, 提出了一种基于动态规划的检测前跟踪"

壑雍
5 years ago
Views:

1 Journal of Northwestern Polytechnical University Apr. Vol No. TBD 张鹏, 张林让针对高脉冲重复频率雷达高速运动弱小目标检测的距离模糊问题, 提出了一种基于动态规划的检测前跟踪算法在目标的状态转移方程中, 将目标的实际距离转化为模糊距离和模糊数两个变量, 将解距离模糊问题转换为对模糊距离和模糊数的联合估计问题文中提出的基于动态规划的检测前跟踪算法, 通过最大后验概率估计方法 ( MAP) 联合估计目标的模糊距离多普勒速度和模糊数的变化, 在存在距离模糊的情况下完成了对高速弱小目标能量的积累和检测仿真结果表明, 在多重脉冲重复频率工作模式下, 该算法对高速运动弱小目标具有很好的检测性能高脉冲重复频率, 距离模糊, 模糊数, 动态规划, 检测前跟踪 TN957 A PRT TBD PRF 9 HPRF DPA TBD Hough HPRF 10 TBD TBD 3-5 Deng 5 DP-TBD

2 z k = z p q k p q S 6 TBD p q S = 1 - N r 1 N d 1. 1 z p q k = h p q x k + n p q k E k = 1 7 { k n p q k E k = 0 x珘 k = r r a T k 1 h p q x k n p q k r r a σ h p q X k = I k exp - p Δ r - r k - r 0 + N r Δ r / 1 T R T R / T R / { σ } r x珘 k = 0 1 T R x 珘 k -1 + T R w k exp - q Δ - d - d + N d k 0 dδ d / w k 0 Q T R 8 r 0 d 0 Δ r Δ d σ r σ d r k d k z p k r k = r m k + m k - 1 R u 3 DFT p q r m k R u R u = c / F c F m p z k k x k H 1 = z p q k σ m k 1 M + 1 M = Int R max /R u exp - k + h p x k m k T R / T R 1 w k 5 m k - m k { } σ d ( ) z p q r k = d k Ι 0 ( σ ) 9 k p q x k = r m k d k a T k 4 1 T R T R / m k -1 - m k R u p z p q k x k H 0 = z p q k exp - z p q k x k = 0 1 T R x k σ ( σ ) σ L z k x k H 1 = p z k x k H 1 p z k x k H 0 ( ) z p q Ι 0 ( ) = exp - h p q x k σ σ 11

3 TBD 75 TBD MAP ^X k ^M k = arg maxp X k M k Z k X k M k 5. 1 HPRF z p q 1 HPRF I k +1 x k +1 m k +1 = lnι 0 ( ) - MTD h p q x k HPRF + max lnp x σ k +1 m k +1 x k m k + X k M k HPRF DP-TBD lnp m k +1 m k x k + I k x k m k 13 TBD lnp x k +1 m k +1 x k m k + lnp m k +1 m k x k HPRF K ^x K ^m K = arg maxi K x K m K 14 X K M K. 3 DP-TBD P i = 1 N r 1 N d P i + = 1 N r 1 N d 1 HPRF M ip = 1 N r 1 N d 1 K DP-TBD X ip = 1 N r 1 N d 1 K 1 3 TBD K 1 i K K-1 z p q HPRF1 K HPRF P i n l = lnι 0 ( σ ) - h p q x k σ P i + n l = O 15 M ip n l 1 X ip n l 1 K - 1 HPRF1 K HPRF k K F i P i z p q P i + n l = lnι 0 ( σ ) -. h p q x k + max P σ i n 1 l 1 16 n 1 l 1 S k σ 1

4 76 3 S k = S Δm0 S Δm1 Δm k = m k -1 - m k S Δm0 Δm k = 0 S Δm1 Δm k = 1 M ip n l k X ip n l k P i n l = P i + n l 3 Nd 64 V T v = 3 Ma r 0 = P n l V T km a = 5 3 km 18 km Monte-Carlo /GHz 10 /MHz 5 PRI / μs T R /s 1 Nr 56 Q = 1m /s PRI1 PRI 80 μs 10 μs 1 PRI1 3 PRI TBD K = 6 6 db 3 db 5 PRI K = 6 6

5 TBD 77 4 TBD HPRF TBD HPRF HPRF DP-TBD 1. J Qiang Yong Jiao Licheng Bao Zheng. Study on Mechanism of Dynamic Programming Algorithm for Dim Target Detection J. Journal of Electronics and Information Technology in Chinese Leigh A J. Performance Analysis of a Dynamic Programming Track Before Detect Algorithm J. IEEE Trans on Aerosp and E- lectron Syst Buzzi S Lops M Venturino L. Track-Before-Detect Procedures for Early Detection of Moving Target from Airborne Radars J. IEEE Trans on Aerosp Electron Syst Buzzi S Lops M Ferri M. Track-Before-Detect Procedures in a Multi-Target Environment J. IEEE Trans on Aerosp Electron Syst Deng X Pi Y Morelande M Moran B. Track-Before-Detect Procedures for Low Pulse Repetition Frequency Surveillance Radars J. IET Radar Sonar Navig Boers Y Driessen J N. Multi-Target Particle Filter Track before Detect Application J. IEE Proceedings of Radar Sonar Navig J Wu Sunyong Liao Guisheng Yang Zhiwei. Improved Track-Before-Detect Algorithm for Weak Targets Based on Particle Filter J. Systems Engineering and Electronics in Chinese 8. J Wu Zhaoping Zhu Kairan Su Tao et al. Extended Radar Target Tracking Before Detection Using the Modified Filter J. Journal of Xidian University in Chinese 9. HPRF DPA J Zhang Wei Kong Lingjiang Yang Xiaobo et al. An Improved Dynamic Programming Algorithm of Weak Target Detection for HPRF Radar J. Modern Radar in Chinese 10 Wang N Wang G H Zeng J Y et al. Range Ambiguity Resolving of HPRF Radar Based on Hybrid Filter J. Science China Information Sciences

6 78 3 A Track-Before-Detect Algorithm for High Pulse Repetition Frequency Radar Zhang Peng Zhang Linrang National Laboratory of Radar Signal Processing Xidian University Xi'an China Abstract In this paper a novel track-before-detect TBD algorithm is proposed to detect radar high speed dim target for high pulse repetition frequency HPRF radars with range ambiguity. By considering the ambiguous radial range of the target and range ambiguous number as target states the problem of range ambiguity resolving is converted into the hybrid state estimation problem. We present a DP TBD method for joint maximum a posteriori MAP estimation of the target trajectory in ambiguous range-doppler maps and the corresponding sequence of incremental quantity of range ambiguous number. With the existence of range ambiguity the detection of dim target through the accumulation of corresponding energy is realized by the proposed algorithm. Simulation results and their analysis confirm preliminarily that the proposed method is effective and applicable thus improving the detection performance of radar high speed dim target. Key words algorithms computer simulation conformal mapping cost functions Doppler effect Doppler radar dynamic positioning efficiency equations of state errors flowcharting iterative methods mathematical models matrix algebra probability radar radar tracking state estimation target tracking targets trajectories HPRF high pulse repetition frequency range ambiguity range ambiguous number dynamic programming algorithm track before detect

1 引言

1 引言 P P 第 40 卷 Vol.40 第 7 期 No.7 计算机工程 Computer Engineering 014 年 7 月 July 014 开发研究与工程应用文章编号 :1000-348(014)07-081-05 文献标识码 :A 中图分类号 :TP391.41 摘基于图像识别的震象云地震预测方法谢庭,

Journal of Northwestern Polytechnical University Apr. Vol No.2 TBD 张鹏, 张林让 针对高脉冲重复频率雷达高速运动弱小目标检测的距离模糊问题, 提出了一种基于动态规划 的检测前跟踪

Journal of Northwestern Polytechnical University Apr. Vol No.2 TBD 张鹏, 张林让针对高脉冲重复频率雷达高速运动弱小目标检测的距离模糊问题, 提出了一种基于动态规划的检测前跟踪