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Continuous variable-rate satellite communication transponder system based on FPGA (Field Programmable Gate Array)

A transponder system and satellite communication technology, which is applied in the field of satellite communication, can solve the problem of inflexible forwarding rate, achieve high-performance communication forwarding, reduce system resource consumption, and low resource consumption

Pending Publication Date: 2022-04-15
CHANGGUANG SATELLITE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the technical problem that the forwarding rate of the prior art is not flexible enough, often only for several specific rate signals. The present invention proposes a continuously variable rate satellite communication transponder system based on FPGA

Method used

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  • Continuous variable-rate satellite communication transponder system based on FPGA (Field Programmable Gate Array)
  • Continuous variable-rate satellite communication transponder system based on FPGA (Field Programmable Gate Array)
  • Continuous variable-rate satellite communication transponder system based on FPGA (Field Programmable Gate Array)

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Embodiment 1

[0049] This embodiment provides a continuously variable rate satellite communication transponder system based on FPGA, combined figure 2 This embodiment can be better understood, the transponder system includes: a variable rate receiver, a data processing module, a control word conversion module and a variable rate transmitter;

[0050] The transponder system receives a continuously variable rate baseband signal and inputs it to the variable rate receiver for demodulation, the demodulated signal is input to the data processing module for data processing, and the processed data is output to the A variable rate transmitter; the variable rate receiver also outputs a control signal to the control word conversion module during demodulation, and the control word conversion module converts the received control signal and outputs it to the variable rate transmitter; The variable rate transmitter performs modulation according to the received control signal and the processed data befor...

Embodiment 2

[0053] This embodiment is an example to illustrate the structure of the variable rate receiver in Embodiment 1, combining image 3 This embodiment can be better understood. The variable rate receiver described in this embodiment includes an integer multiple sampling unit, a frequency discrimination unit, a symbol synchronization loop and a carrier recovery loop, and the symbol synchronization loop is embedded in the in the carrier recovery loop;

[0054] The continuously variable rate baseband signal is input to the integer multiple sampling unit for down-sampling, and the down-sampled data is sent to the frequency discrimination unit for coarse frequency synchronization, and the synchronized signal is input to the symbol synchronization unit. The loop performs clock error correction to form a demodulated signal output, and then performs phase error correction through the carrier recovery loop.

[0055] The variable rate receiver described in this embodiment uses an integer m...

Embodiment 3

[0057] This embodiment is to illustrate the specific structure of the integer multiple sampling unit in Embodiment 2. The integer multiple sampling unit structure described in this embodiment is as follows Figure 4 As shown, using FIR filter or CIC+HB filter, the number of sampling stages is selected for the symbol rate of the baseband signal in the way of multi-stage 2 times sampling unit cascading, so that the sampling rate after sampling is 2 to 4 of the symbol rate times.

[0058] The symbol synchronization loop at the back end of the integer multiple sampling unit is processed by a fixed-point number, so when the sampling rate and the multiple of the symbol rate are too different, there are problems of timing error and insufficient interpolation accuracy, and the out-of-band noise will also affect demodulation performance. So the data entering the variable rate receiver needs to be sampled to match the received symbol rate. In this embodiment, in order to adapt to diff...

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Abstract

The invention discloses a continuous variable-rate satellite communication transponder system based on an FPGA (Field Programmable Gate Array), and relates to the field of satellite communication, in particular to a satellite communication forwarding technology. The problem that the forwarding rate is not flexible enough and only several specific rate signals are forwarded is solved. The system comprises a variable-rate receiver, a data processing module, a control word conversion module and a variable-rate transmitter, a continuous variable-rate baseband signal is input into the variable-rate receiver for demodulation, and the demodulated signal is input into the data processing module for processing and then output to the variable-rate transmitter; the variable-rate receiver also outputs a control signal to the control word conversion module during demodulation, and the converted control signal is output to the variable-rate transmitter; and the variable rate transmitter performs modulation according to the received control signal and the processed data and then transmits and outputs the data. The method is suitable for the field of processing transponder load design in satellite communication, and high-performance communication forwarding in satellite communication is achieved.

Description

technical field [0001] The invention relates to the field of satellite communication, in particular to satellite communication forwarding technology. Background technique [0002] FPGA (Field Programmable Logic Gate Array) has the characteristics of rich wiring resources, repeatable programming, high integration, and low investment. It has been widely used in the field of digital circuit design. The main difficulty of FPGA design is to be familiar with the hardware system and internal Resources, to ensure that the design language can achieve effective cooperation between components, improve the readability and utilization of the program, which puts forward higher requirements for designers. [0003] Satellite communication transponder is an important load of satellite communication. According to whether the transponder has processing function, the communication transponder can be divided into two categories: transparent transponder and processing transponder. Among them, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185
CPCH04B7/18513H04B7/18519Y02D30/70
Inventor 鲍大志邢斯瑞孙伟韩旭天隋涛
Owner CHANGGUANG SATELLITE TECH CO LTD
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