GPU-based PCM/FM telemetry signal incoherent demodulation implementation method

Abstract

The invention provides a GPU-based PCM / FM telemetry signal parallel incoherent demodulation realization method. The method is realized based on a GPU-equipped telemetry demodulation system, and the GPU-equipped telemetry demodulation system comprises: a signal acquisition module, a high-speed interface module, a core operation module, and a system control module; the signal acquisition module is used for carrying out digital sampling on signals and adjusting signal amplitudes; the high-speed interface module receives data signals output by the signal acquisition module and sends the data signals to the system control module; the system control module distributes the segmented data to the core operation module; the core operation module comprises a plurality of GPUs; the method comprises the steps of parallel digital down-conversion, parallel FIR (Finite Impulse Response) filtering, parallel frequency discrimination demodulation, and Doppler frequency offset estimation. According to the scheme, the reliability is higher, and the expansibility is better; compared with a traditional GPU-based PCM / FM telemetry signal demodulator, the method is better in parallelism, and real-time demodulation of signals can be achieved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for realizing non-coherent demodulation of PCM / FM telemetry signals based on GPU. Background technique [0002] Aircraft telemetry is an essential and important support system in the test and operation of missiles, rockets, satellites and other spacecraft. It can monitor important information such as the internal working status, electrical performance, and environmental parameters of the spacecraft in real time. and provide a basis for failure analysis. Nowadays, with the in-depth development of the aerospace industry, the exploration of the universe and the competition for the resources of the universe are becoming more and more intense among the major aerospace countries around the world, which makes telemetry technology play a more important role. [0003] Pulse Code Modulation / Frequency Modulation (PCM / FM) technology has the characteristics of strong anti-plu...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the above-mentioned technical problems, the present invention proposes a non-coherent demodulation method for PCM / FM telemetry signals based on GPU. The amount of equipment and the way to increase the complexity of the system do not meet the increasing demand for future test tasks; the customized R&D model for established tasks and functional requirements is difficult to quickly respond to the immediate needs of users, and does not adapt to the complex and changeable test task requirements in the future ;The hardware system structure is complex, the function is difficult to expand, and the technical problems of high coupling between software and hardware

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