Spread spectrum demodulation simulation verification system

A spread-spectrum demodulation and simulation verification technology, applied in the field of spread-spectrum transponders, can solve the problems of inability to verify the baseband processing FPGA mislock and frame loss, facilitate transmission, and fail to complete closed-loop testing, so as to improve the simulation verification coverage, The effect of avoiding design hidden dangers and facilitating fault location

CN114389719AActive Publication Date: 2022-04-22SHANGHAI AEROSPACE COMP TECH INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-04-22

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Abstract

The invention relates to a spread spectrum demodulation simulation verification system, which comprises a simulation data signal source generation module, a simulation sine and cosine wave generation module, a simulation code offset adaptive adjustment spread spectrum code generation module, a simulation spread spectrum modulation module, a simulation demodulation data receiving module, a simulation working state detection module and a scoreboard module. The method is suitable for ground simulation verification of a spread spectrum baseband processing FPGA in a satellite product, and configuration of a simulation environment can be carried out by changing parameters, so that the working correctness of each module of a spread spectrum demodulation module FPGA can be verified under the condition that Doppler frequency offset of a spread spectrum modulation system is an arbitrary value, especially under the condition of dynamic frequency sweeping. Meanwhile, the intermediate frequency signal input by the FPGA can be adjusted according to the feedback AGC value output by the FPGA, and a closed-loop simulation environment is provided for the baseband processing FPGA.
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Description

technical field

[0001] The invention relates to the field of spread spectrum transponders in satellite products, in particular to a spread spectrum demodulation simulation verification system. Background technique

[0002] Spread spectrum demodulation processors are widely used in satellite engineering as communication equipment. The advantages of using FPGA for spread spectrum demodulation processing design are fast running speed, low power consumption, and low cost. The disadvantage is that the chip is used for design, and the algorithm is very complicated, which leads to the internal signal and its complexity, which is prone to hidden dangers in design. However, the observation signals of the hardware joint test are limited, and it is impossible to observe all the complicated signals and find hidden dangers in the design.

[0003] The existing simulation verification methods all use the mathematical modeling software Matlab to simulate the modulation signal to generate t...

Examples

Embodiment Construction

[0039] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0040] This embodiment provides a spread spectrum demodulation simulation verification system based on the baseband processing FPGA, which is used to provide a closed-loop working environment for the baseband processing FPGA, especially to overcome the large amount of output data in the existing simulation technology, which cannot be performed. Complete dynamic simulation test problem, flexible simulation of real-time changing data information, timely response to FPGA feedback AGC for energy adjustment, ...