一种相控阵雷达搜索参数设计策略

doi:10.7527/S1000-6893.2022.28124

Abstract

Abstract:

To reach the largest detection range when detecting hypersonic targets with phased array radar， a search parameter optimization strategy is implemented based on the enhanced alert-confirm detection method. Firstly， the needs for search parameters optimization are highlighted in light of target characteristics and principles of radar. The fundamentals of alert-confirm detection are examined， and the calculation method for frame time of the mean appearance rate of new target in the search volum is given. Secondly， the dwell time， false alarm probability of alert detection and confirm detection for each position are taken as optimization variables， and the objective function is the farthest detection range. Following this， the procedures for the solution are provided. Finally， simulation is employed to confirm the viability of the proposed approach. The simulation results demonstrate that the proposed technique may achieve a greater detection range with a shorter frame time under the twin limitations of the total false alarm probability and the maximum dwell time permitted for each position. When the tracking load is the same， the proposed technique performs better than the uniform search method and the alert-confirm detection method.

Key words: phased array radar, hypersonic target, alert-confirm detection, frame time, cumulative detection range

CLC Number:

V412.1

Jiancheng ZHENG, Zhiguo QU, Xiansi TAN, Zhihuai LI, Gang ZHU, Chenlong YU. Design of search parameters for hypersonic target detection by phased array radar[J]. Acta Aeronautica et Astronautica Sinica, 2023, 44(16): 328124-328124.

Figures/Tables 16

Fig.1

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Table 1

Pseudocode of optimization method

输入：最大波束驻留数 $N t$ ，总虚警概率 $P f a$

输出：累积探测概率为0.95时的距离 $R 95$

1 $P f a 1 ← P f a 1, m i n : Δ P f a 1 : P f a 1, m a x$

2 for $N 1 ← 1 : N t$ do

3 $T d 1 ← N 1 T r$ ；

4 $j ← 0$ ；

5 while $P f a 1 < P f a 1, m a x$ do

6 $P f a 1 ← P f a 1, m i n + j Δ P f a 1$ ；

7 根据式（9）计算 $P f a 2$ ；

8 for $N 2 ← 1 : N 2$ do

9 $T d 2 ← N 2 T r$ ；

10 if $N 1 + N 2 < N t$ then

11 根据式（7）计算帧时间 $t f$ ；

12 if $t f ≤ T s / 2$ then

13 根据搜索雷达方程计算信噪比；

14 根据式（4）分别计算 $P d i$ ；

15 $P c ← 0.95$ ，根据式（8）求解 $R 95$ ；

16 end if

17 end if

18 end for

19 $j ← j + 1$ ；

19 end while

20 end for

Table 1

Fig.5

Table 2

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

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References 20

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参数项目	参数值
系统等效噪声温度/K	913
脉冲重复周期/ms	8
功率孔径积/（kW·m²）	2 400
最大探测距离/km	800
系统损耗/dB	17
波位个数	80

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Design of search parameters for hypersonic target detection by phased array radar

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