Phase continuous signal switching method and test system
A signal switching and testing system technology, applied in the field of satellite navigation, can solve the problems of signal interruption, signal phase jump, phase continuity cannot be guaranteed, etc., to achieve the effect of eliminating phase jump, improving test efficiency and accuracy, and eliminating signal interruption
Active Publication Date: 2021-01-12
CHANGSHA TECH RES INST OF BEIDOU IND SAFETY CO LTD
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Problems solved by technology
However, there are short signal interruptions or signal phase jumps in both solutions, which cannot guarantee the continuity of the phase, which will have an adverse impact on the test.
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[0025] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of the invention, not an embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0027] The following introduces an embodiment of a phase continuous signal switching method provided by the present invention, such as figure 1 A schematic flow diagram of the method of this embodiment is shown, incl...
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The invention relates to the field of satellite navigation, and provides a phase continuous signal switching method which comprises the following steps: at the moment, a first antenna transmits a signal, and a second antenna does not transmit the signal, and the moment is the starting moment of signal switching; at the moment, the first antenna and the second antenna transmit signals at the same time, the signals transmitted by the first antenna and the second antenna are generated by adopting a common time-frequency reference, the signal transmitting power of the first antenna is decreased until the first antenna is turned off along with the increase of time, and the signal transmitting power of the second antenna is increased until the second antenna reaches target power along with the increase of time, wherein the time is the end time of signal switching; and at the moment, the first antenna does not transmit signals, and the second antenna transmits signals, so that the problem ofsignal interruption or phase mutation caused by the influence of different signal incoming directions in a real environment on the tested terminal by switching the positions of the transmitting antennas of the satellite navigation signals in a test environment is solved.
Description
technical field [0001] The invention relates to the field of satellite navigation, in particular to a phase-continuous signal switching method and a testing system. Background technique [0002] In the darkroom environment with multiple transmitting antennas, with the movement of the simulated satellite and / or carrier, the elevation angle and azimuth angle of the satellite relative to the carrier change. Switch between different antennas to test the impact of the terminal under test with a more realistic navigation signal. [0003] The switching process of satellite navigation signal antennas in different installation positions is generally realized in two ways: 1) Each antenna is connected to a navigation signal source, and different signal transmissions are realized by controlling the switch of the navigation signal source; 2) Switching is realized through a radio frequency switch . However, there is a short signal interruption or a phase jump of the signal in both solut...
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IPC IPC(8): G01S19/42G01S19/13
CPCG01S19/13G01S19/423
Inventor刘春阳刘志俭聂莹陈茁
OwnerCHANGSHA TECH RES INST OF BEIDOU IND SAFETY CO LTD