A mobile communication satellite multi-beam carrier-to-interference ratio ground test system and method
A communication satellite, ground testing technology, applied in transmission systems, radio transmission systems, transmission monitoring and other directions, can solve problems such as can not be considered, C/I can not completely describe the system performance, to improve timeliness, improve testing The effect of efficiency
Active Publication Date: 2020-08-14
XIAN INSTITUE OF SPACE RADIO TECH
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0009] Since the beam test cannot take into account the intermodulation in the active device when multiple carriers in multiple beams using the same frequency work simultaneously, the C / I given by this method generally cannot fully describe the performance of the system
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0062] The multi-beam load of a mobile communication satellite is as follows: figure 2 As shown, the system has 109 beams, 64 feeds are used for sharing transmission and reception through a duplexer, 109 beams implement 30MHz 7-color multiplexing, and each frequency is multiplexed 15 to 16 times.
[0063] Using the system proposed by the present invention, according to the method of the present invention, the C / I of all beams is tested, and the minimum C / I in the service area of all beams is counted.
[0064] After calculation, when the phase-shifting and attenuation components of the transmitting antenna simulator meet the requirements of the amplitude and phase accuracy: ±0.5dB, ±10 degrees, and the attenuation range of the attenuator is 0-35dB, the main lobe error of the beam is less than 0.01dB, and the side lobe error is less than 0.01dB. 1dB@30dBc (that is, the error of the sidelobe 30dB lower than the main lobe level is about 1dB, and the error of the sidelobe level o...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a ground testing system and method for testing the multi-beam carrier-to-interference ratio of a mobile communication satellite. The system comprises a power supply, a control module, a multi-channel signal source, a transmitting antenna simulator and a frequency spectrograph; the power supply supplies power to the control module, the multi-channel signal source, the transmitting antenna simulator and the frequency spectrograph; the multi-channel signal source provides a testing signal for a tested part; the transmitting antenna simulator realizes simulation of response of a reflector and a feed source in a large multi-beam antenna on a signal; the control module controls phase-shifting and attenuation parameters of phase-shifting and attenuation components in the transmitting antenna simulator; and the frequency spectrograph is used for reading the output test signal level. Mainly for the load of the mobile communication satellite using the large multi-beam antenna, the transmitting antenna simulator simulates response of the feed source and the reflector in the large multi-beam antenna, so that ground testing of the carrier-to-interference ratio of the multi-beam load of the mobile communication satellite can be realized.
Description
technical field [0001] The invention relates to a mobile communication satellite multi-beam load beam carrier-to-interference ratio ground test system and method, which are suitable for the mobile communication satellite multi-beam load beam carrier-to-interference ratio ground test and belong to the mobile communication satellite payload technical field. Background technique [0002] The multi-beam load based on reflector multi-beam antenna is the core technology of geostationary mobile communication satellites. The multi-beam load includes transponders, beamforming equipment, feed arrays, and large-aperture antennas. The size of large-aperture antennas can reach ten meters or several ten meters, such as figure 2 shown. [0003] In order to improve the utilization efficiency of frequency resources, frequency multiplexing technology is generally used, and 7-color multiplexing and 4-color multiplexing are commonly used. [0004] Due to the existence of sidelobes in beams, t...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0404H04B7/0408H04B7/155H04B17/336
CPCH04B7/0404H04B7/0408H04B7/155H04B17/336
Inventor 陈博崔兆云周兰兰黄齐波李荣军骆陶君王无兔陈明章李殷乔柴源南冰
Owner XIAN INSTITUE OF SPACE RADIO TECH