Method for determining satellite navigation signal quality evaluation parameters

A satellite navigation signal and quality evaluation technology, applied in the field of satellite navigation, can solve problems such as inability to evaluate related losses, S-curve offset, low evaluation accuracy, and inability to evaluate special types of navigation signals, so as to meet the requirements of payload testing and indicators Wide coverage effect

Active Publication Date: 2013-09-04
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

[0007] However, the following problems exist in the evaluation of navigation signal quality through the above three methods: (1) Only general spread spectrum signals, such as BPSK, QPSK, etc. can be evaluated, and special types of navigation signals, such as AltBoc, TMBOC, etc. cannot be evaluated
(2) The evaluation accuracy is low, which can only meet the needs of monitoring navigation signals broadcast by satellites, but cannot meet the needs of navigation satellite payload testing; (3) It can only evaluate some index items, and cannot evaluate related losses, S-curve offsets, etc. technical indicators

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  • Method for determining satellite navigation signal quality evaluation parameters
  • Method for determining satellite navigation signal quality evaluation parameters
  • Method for determining satellite navigation signal quality evaluation parameters

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Embodiment Construction

[0060] Satellite navigation signal quality evaluation parameters include Gabor bandwidth, vector error magnitude EVM, magnitude error, phase error, pseudo code consistency, phase deviation, correlation loss, S-curve offset and delay stability;

[0061] Such as figure 1 As shown, the method for determining the satellite navigation signal quality evaluation parameters provided by the present invention, the specific steps are as follows:

[0062] (1) Set the sampling frequency f s, using the satellite navigation signal to generate a clock source, generating a sampling clock signal and a second pulse signal, performing homologous sampling on the satellite navigation signal, and obtaining a sampled navigation signal;

[0063] The same-source sampling described in step (1) includes the following steps:

[0064] (a) Using a frequency synthesizer and the clock source generated by using the navigation signal, generate the frequency described in step (1) as f s Sinusoidal signal;

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Abstract

The invention provides a method for determining satellite navigation signal quality evaluation parameters. The satellite navigation signal quality evaluation parameters comprise Gabor bandwidth, error vector magnitude (EVM), amplitude error, phase error, pseudo-code consistency, phase deviation, phase loss, S curve offset and delay stability. By changing an ideal pseudo-code generating mode, common spread spectrum signals such as binary phase shift keying (BPSK) and quadrature phase shift keying (QPSK) can be evaluated, various special navigation signals such as binary offset carrier (BOC), alternate binary offset carrier (AltBoc), time division alternate binary offset carrier (Td-AltBoc) and time multiplexed binary offset carrier (TMBOC) can be evaluated; and by the high-precision evaluation of pseudo-code phase and carrier phase, each evaluation item of the navigation signals can be highly precisely evaluated, and the requirement on navigation satellite effective load testing can be met.

Description

technical field [0001] The invention relates to a method for determining satellite navigation signal quality evaluation parameters, and belongs to the technical field of satellite navigation. Background technique [0002] In the development process of the navigation satellite payload, in order to verify the correctness of the navigation signal and investigate the distortion introduced by the signal generation process, a method for evaluating the quality of the satellite navigation signal is needed; Navigation signal quality also requires a navigation signal quality assessment method. [0003] At present, the following methods can be used to evaluate the quality of satellite navigation signals: [0004] Method 1, using a general-purpose vector signal analyzer; [0005] Method 2, using a hardware or software receiver; [0006] Method 3, using the method of baseband signal acquisition. [0007] However, the following problems exist in the evaluation of navigation signal qua...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/20
Inventor 苏哲徐启炳韩虹王磊陶晓霞
Owner XIAN INSTITUE OF SPACE RADIO TECH
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