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Intermediate frequency equivalent low-earth-orbit satellite mobile channel simulator with channel switching control

A channel switching, low-orbit satellite technology, applied in the field of satellite communications

Inactive Publication Date: 2009-11-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that there is no low-orbit satellite mobile communication channel simulator that can approach the real channel conditions to the greatest extent, the present invention proposes a medium-frequency equivalent low-orbit satellite mobile channel simulator with channel switching control

Method used

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  • Intermediate frequency equivalent low-earth-orbit satellite mobile channel simulator with channel switching control
  • Intermediate frequency equivalent low-earth-orbit satellite mobile channel simulator with channel switching control
  • Intermediate frequency equivalent low-earth-orbit satellite mobile channel simulator with channel switching control

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specific Embodiment approach 1

[0009] Specific implementation mode one: combine figure 1 Describe this embodiment, the uplink channel emulator of the intermediate frequency equivalent low-orbit satellite mobile channel emulator with channel switching control in this embodiment includes an uplink channel switching control part 11, an uplink emulation control agent part 12 and six uplink channel fading characteristic simulation parts 13;

[0010] The three input terminals of the uplink channel switching control part 11 are user terminal signal input terminals, and the six signal output terminals of the uplink channel switching control part 11 are respectively connected to the signal inputs of the six uplink channel fading characteristic simulation parts 13 The signal output terminals of the six uplink channel fading characteristic simulation parts 13 are satellite beam output terminals; the simulation signal output terminals of the uplink simulation control agent part 12 are simultaneously connected to the in...

specific Embodiment approach 2

[0014] Specific implementation mode two: combination image 3 Describe this embodiment, the difference between this embodiment and specific embodiment one is that the uplink channel switching control part 11 includes a three-input and six-out channel switching matrix 111 and an uplink FPGA control module 112;

[0015] The three-input and six-out channel switching matrix 111 includes three microwave splitters 31, six three-choice selectors 32 and control IO ports 33; One input end of the selector 32 is connected, and the output ends of six three-choice one selectors 32 are six output ends of the three-input and six-out channel switching matrix 111, which are six signal outputs of the uplink channel switching control part 11 Terminal; Control IO port 33 has six groups of control terminals of three selectors, and the control terminal of each group of three selectors has three ports, and controls the control of six groups of three selectors of IO port 33 terminal is respectively ...

specific Embodiment approach 3

[0017] Specific implementation mode three: combination Figure 5 Describe this embodiment, the difference between this embodiment and the specific embodiment is that the uplink channel fading characteristic simulation part 13 includes an analog / digital conversion module 51, a digital signal processing module 52 and a digital / analog conversion module 53;

[0018] The signal input end of the uplink channel fading characteristic simulation part 13 is the input end of the analog / digital conversion module 51, and the signal output end of the uplink channel fading characteristic simulation part 13 is the output end of the digital / analog conversion module 53;

[0019] The digital signal processing module 52 includes a Hilbert filter 521, a fast memory 522, a frequency shift parameter module 523, a synchronous dynamic random access memory 524, a universal asynchronous transceiver transmission module 525, a delay parameter module 526, and a fading parameter module 527 , noise power con...

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Abstract

An intermediate frequency equivalent low-earth-orbit satellite mobile channel simulator with channel switching control relates to the field of satellite communication. The invention settles the problem that no low-earth-orbit satellite mobile communication channel simulator which maximumly approaches the real channel does not exist at present. The intermediate frequency equivalent low-earth-orbit satellite mobile channel simulator with channel switching control is composed of an uplink channel simulator and a downlink channel simulator. Three input ends of the uplink channel switching control part of the uplink channel simulator are user terminal signal input ends. Six signal output ends of the uplink channel switching control part are respectively connected with the signal input ends of six uplink channel fading characteristic simulation parts. The signal output ends of six uplink channel fading characteristic simulation parts are satellite beam output ends. The simulation signal output ends of the uplink simulation control proxy part is simultaneously connected with the input end of the uplink channel switching control part and the input ends of six uplink channel fading characteristic simulation parts. The process of the downlink channel simulator is the reverse process of the uplink channel simulator.

Description

technical field [0001] The invention belongs to the field of satellite communication, and in particular relates to an intermediate frequency equivalent low-orbit satellite mobile channel simulation method with channel switching control. Background technique [0002] In the planning and design of the low-orbit satellite mobile communication system and the development of transceivers, it is necessary to analyze and simulate the characteristics of the satellite mobile channel, which often requires experimental conditions close to the real channel conditions. If the channel characteristics are simulated by software simulation, it is difficult to achieve real-time performance due to the large amount of calculation in the software, and the lack of physical interface is not conducive to using actual equipment for testing. It would be expensive to rent a satellite link to do such an experiment. Therefore, there is a need for a low-orbit satellite mobile communication channel simula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/00H04B17/00H04B17/391
Inventor 关庆阳李含青井庆丰杨明川郭庆谭学治张中兆
Owner HARBIN INST OF TECH
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