传输通道相位失真对非恒包络信号质量的影响分析

doi:10.12305/j.issn.1001-506X.2023.06.02

Abstract

Abstract:

The observation results of the first satellite of the Global Positioning System Ⅲ (GPS Ⅲ) show that its constellation diagram has the characteristic of non-constant envelope. At present, there is little research on non-constant envelope signals in China, and its advantages are not fully utilized in the design of satellite navigation signals. In order to study the performance of non-constant envelope signal after channel distortion, this paper simulates the constant envelope signal and non-constant envelope signal, and constructs the transmission channel phase distortion model, then evaluates and analyzes the signal quality after the simulated signal passes through the distortion model, and finally gives the measured signal results for verification. The research results show that the ranging performance of non-constant envelope signal is better than that of constant envelope signal under the influence of phase distortion.

Key words: satellite navigation signal, non-constant envelope, phase distortion, signal quality assessment

CLC Number:

TN911.6

Qianqian YANG, Chengyan HE, Pengbo WANG, Zibin HAN. Influence analysis of transmission channel phase distortion on the quality of non-constant envelope signal[J]. Systems Engineering and Electronics, 2023, 45(6): 1597-1605.

Figures/Tables 17

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References 31

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信号	信息
信号	调制方式	码长	服务
B1I	BPSK(2)	2 046	公开
B1Cd	BOC(1, 1)	10 230	公开
B1Cp	QMBOC (6, 1, 4/33)	10 230	公开
B1A	-	-	授权

信号	信息
信号	调制方式	码长	服务
C/A	BPSK(1)	1 023	公开
P(Y)	BPSK(10)	6 187 104 000 000	授权
L1Cd	BOC(1, 1)	10 230	公开
L1Cp	TMBOC	1 800×10 230	公开
M	BOC(10, 5)	未公开	授权

仿真信号	支路	SCB/ns	SCS/%
B1恒包络	B1I	0.054	0.087
	B1Cd	0.017	0.128
	B1Cpa	0.014	0.149
B1非恒包络	B1I	0.018	0.029
	B1Cd	0.003	0.105
	B1Cpa	0.002	0.075
L1非恒包络	L1C/A	0.029	0.133
L1非恒包络	L1Cd	0.012	0.147

信号	支路	超标范围	随z增大的变化趋势
B1恒包络	B1I	z＞0.76	递增, z＞1.2, 快速增长
	B1Cd	z＞0.76	递增, z＞0.7, 快速增长
	B1CPa	z＞0.94	递增, z＞0.7, 快速增长
B1非恒包络	B1I	z＞0.70	相对平稳
	B1Cd	z＞0.80	相对平稳
	B1CPa	z＞1.32	相对平稳

信号	支路	超标范围	随z增大的变化趋势
B1恒包络	B1I	z＞1.28	递增, z＞0.5, 快速增长
	B1Cd	未超标	递增, z＞1.0, 快速增长
	B1Cpa	未超标	递增, z＞1.1, 快速增长
B1非恒包络	B1I	未超标	相对平稳
	B1Cd	未超标	相对平稳
	B1Cpa	未超标	相对平稳

Influence analysis of transmission channel phase distortion on the quality of non-constant envelope signal

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信号	支路	SCB超标范围	SCS超标范围
L1非恒包络	L1C/A	z＞0.02	z＞1.20
L1非恒包络	L1Cd	z＞0.40	z＞0.40
B1非恒包络	B1I	z＞0.20	未超标
B1非恒包络	B1Cd	z＞0.80	未超标

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信号	SCB/ns	SCS/%
B1I	0.301	0.342
L1C/A	0.019	0.302
B1Cd	0.106	0.362
L1Cd	0.084	0.293