脉冲星特征频率信号的到达时间处理方法

doi:10.7527/S1000-6893.2021.26185

Abstract

Abstract:

Pulsar navigation is the most potential technology for autonomous management of the satellite in deep space exploration. However， the extremely low flux of pulsar signals limits the signal-to-noise ratio， and challenges high precision navigations. Only breakthrough is achieved in pulsar signal processing can the miniaturization of pulsar navigation system be solved and realized. In this paper， we analyze the problems in pulsar navigation， discuss the route of application for pulsar navigation， and propose a possible scheme for pulsar navigation systems. The Cramer-Rao Bound of the proposed scheme is analyzed and the scheme is demonstrated in simulations using the data of Crab Pulsar. Simulation result shows that the proposed pulsar signal processing scheme can achieve positioning accuracy of 3 km in the direction of Crab Pulsar vector， which is accordance with theoretical expectation.

Key words: pulsar navigation, deep space exploration, lightweight design, miniaturization, pulsar signal processing

CLC Number:

V324.2⁺4

Guodong XU, Danlei ZHANG, Zhendong XU. Arrival time processing method of pulsar characteristic frequency signals[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023, 44(3): 526185.

Figures/Tables 15

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References 26

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光子计数	计数	比例/%
0	16 163 413	60.542 23
1	8 050 318	30.153 54
2	2 114 034	7.918 40
3	330 273	1.237 08
4	36 395	0.136 32
5	3 126	0.011 71
6	185	0.000 69
7	7	0.000 03

序号	脉冲星编号	能流密度（以光子计）/（ph·cm^-2·s^-1）	能流密度（以能量计）/（10^-16J·cm^-2·s^-1）
1	J0534+2200	1.54	9.93
2	J0419+5559	5.98	38.70
3	J1009-5817	3.59	23.20
4	J1013-4504	2.01	13.00
5	J1550-5628	1.80	11.60
6	J1645-4536	1.50	9.68
7	J1654-3950	5.39	34.90
8	J1719-2501	48.90	316.00
9	J1718-4029	4.19	27.10
10	J1733-3113	2.69	17.40
11	J1742-2746	9.08	58.80
12	J1744-2844	38.00	246.00
13	J1747-2633	1.20	7.74
14	J1748-2828	1.92	12.40
15	J1752-3137	4.22	27.30
16	J1801-2504	3.74	24.20
17	J1801-2031	2.10	13.60
18	J1806-2435	1.48	9.57
19	J1814-1709	1.05	6.78
20	J1816-1402	2.10	13.60
21	J1858+2239	1.80	11.60
22	J2144+3819	1.35	8.71
23	J0501+1146	14.40	93.20

谐波频率编号	信噪比/dB	定位偏差/km
1	5.04	10.876
2	5.57	7.126
3	5.74	8.532
5	4.27	1.781

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Arrival time processing method of pulsar characteristic frequency signals

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