Open AccessDemodulation and Recognition of Image Transmission Signals for Small Uav Under Non-Cooperative Conditions
Author(s) -
Zhiyong Zhou,
Zheng Dong,
Tengfei Jia,
Huanyao Dai
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1757/1/012103
Subject(s) - subcarrier , demodulation , orthogonal frequency division multiplexing , computer science , transmission (telecommunications) , frequency offset , carrier frequency offset , signal (programming language) , compensation (psychology) , synchronization (alternating current) , offset (computer science) , electronic engineering , computer vision , artificial intelligence , algorithm , telecommunications , engineering , channel (broadcasting) , psychology , psychoanalysis , programming language
According to the characteristics of CP-OFDM signals, analyzed and studied the subcarrier number estimation, timing synchronization and frequency offset compensation algorithms of CP-OFDM signals under non-cooperative reception conditions, and verified the feasibility of these algorithms based on UAV image transmission signals. As the results show, the algorithm proposed in the article can complete blind demodulation of the CP-OFDM signal and finally complete the sensing and recognition of small UAV signals under the condition of unknown CP-OFDM signal format by means of analysis and estimation algorithms.