PCM/FM telemetry signal parallel multi-symbol detection method based on GPUs

Abstract

The invention provides a PCM / FM telemetry signal parallel multi-symbol detection method based on GPUs, the method is realized based on a telemetry demodulation system with the GPUs, and the telemetry demodulation system with the GPUs comprises a signal acquisition module, a high-speed interface module, a core operation module and a system control module, wherein the signal acquisition module performs digital sampling on a signal and adjusts the signal amplitude; the high-speed interface module receives a data signal output by the signal acquisition module and sends the data signal to the system control module; the system control module distributes the segmented data to the core operation module; and the core operation module comprises a plurality of GPUs. The method comprises parallel digital down-conversion, parallel FIR filtering, parallel frequency discrimination, parallel multi-symbol detection and Doppler frequency offset estimation, wherein the multi-symbol detection is comprises three parts, namely parallel sliding correlation operation, accumulation amplitude calculation and comparison and maximum and minimum value calculation. According to the scheme of the invention, the reliability is higher, the expansibility is better, and the real-time demodulation of signals can be realized.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a GPU-based parallel multi-symbol detection method for PCM / FM telemetry signals. 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-plume effect,...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of the technologies described above, the present invention proposes a parallel multi-symbol detection method for PCM / FM telemetry signals based on GPU, and the method is used to solve (1) existing problems in signal processing based on FPGA boards in the prior art Technical problems of tight coupling of software and hardware, long development cycle and difficult upgrade; (2) Real-time problem of multi-symbol detection algorithm based on GPU

Images