卫星导航系统点波束功率增强信号参数优化设计

doi:10.12305/j.issn.1001-506X.2021.10.30

Abstract

Abstract:

It is an effective measure to improve the anti-jamming performance of navigation signals that navigation satellites transmit spot beam power enhancement signals for specific regions. In view of the narrow beam width and variable direction of the spot beam power enhancement signal, the effects of working parameters such as power enhanced amplitude, half-beam angle and sweep angle on the coverage performance are studied. The analysis results show that when the amplitude of power enhancement varies from 0 to 20 dB, the equivalent noise ratio increases linearly and has the best enhancement effect. When the half-beam angles of geosynchronous earth orbit (GEO)/inclined geosynchronous earth orbit (IGSO) and medium earth orbit (MEO) satellite antenna are 0.86° and 1.31° respectively, the 20 dB power enhancement amplitude can be achieved with the corresponding radius of 542 km and 494 km. When the sweep angles of GEO/IGSO and MEO satellite antenna are 7.79° and 11.90° respectively, the maximum coverage radius reaches 9 046 km and 8 538 km.

Key words: satellite navigation system, power-enhanced technology, spot beam

CLC Number:

P228

Zhicheng LYU, Pengpeng LI, Lixun LI. Optimization design of satellite navigation system spot beam power enhancement signal parameters[J]. Systems Engineering and Electronics, 2021, 43(10): 2954-2960.

Figures/Tables 11

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References 25

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接收灵敏度/dBHz	干扰信号容限/dBm
接收灵敏度/dBHz	信号未进行功率增强	信号功率增强20 dB
20	-80.2	-60.2
25	-85.2	-65.2
30	-90.3	-70.3
35	-97.3	-75.3
40	-130.0	-80.3
45	-	-85.4

功率增强幅度/dB	伪码测量精度/cm
功率增强幅度/dB	功率增强信号	非功率增强信号
0	47.56	47.56
10	41.59	47.70
20	37.84	48.90
30	36.32	54.50
40	36.07	68.21
50	36.04	102.15

θ/(°)	φ/(°)		γ/(°)		$\overline{AP}$/km		S_{$\overline{{\rm{APB}}}$}/10⁸ km²
θ/(°)	GEO/IGSO	MEO	GEO/IGSO	MEO	GEO/IGSO	MEO	GEO/IGSO	MEO
0	8.65	13.21	81.35	76.79	9 046	8 538	2.17	1.97
5	8.61	13.16	76.39	71.84	8 494	7 988	1.95	1.76
10	8.51	13.01	71.48	66.99	7 949	7 449	1.74	1.55
15	8.35	12.76	66.65	62.24	7 411	6 921	1.53	1.36
20	8.12	12.40	61.88	57.60	6 880	6 404	1.34	1.18
25	7.83	11.96	57.17	53.04	6 356	5 898	1.16	1.07
30	7.48	11.42	52.52	48.58	5 839	5 402	0.99	0.86

G/dB	α/(°)		$\overline{AP}$/km		S_{$\overline{{\rm{APB}}}$}/10⁸ km²
G/dB	GEO/IGSO	MEO	GEO/IGSO	MEO	GEO/IGSO	MEO
0	8.61	13.16	8 494	7 988	1.95	1.76
5	4.84	7.39	3 258	2 986	0.33	0.28
10	2.72	4.15	1 745	1 592	0.095	0.079
15	1.53	2.34	968	882	0.029	0.024
20	0.86	1.31	542	494	0.009 2	0.007 7
25	0.48	0.74	304	277	0.002 9	0.002 4
30	0.27	0.42	171	156	0.000 92	0.000 76

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Optimization design of satellite navigation system spot beam power enhancement signal parameters

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