测试科学与仪器2023，Vol.14Issue(4)：387-397,11.DOI:10.3969/j.issn.1674-8042.2023.04.002
一种基于仿鸟叫声的隐蔽通信方法
A covert communication method based on imitating bird calls
摘要
Abstract
When radio communication is interfered with or radio silence is required, the command and intelligence cannot be transmitted among the armed squads in the forest. So there is a great need for a communication method that can replace radio communication to transmit some important information. A novel acoustic covert communication method is proposed. This method encodes the communication information by imitating animals' calls. Taking silvereye's call as an example, silvereye's syllables and the time intervals between syllables are used to encode the communication information. A syllable grouping method based on time-frequency characteristics is designed to improve encoding efficiency and reduce the amount of decoding computation. Meanwhile, various strategies are used to make the encoded communication pulse sequence as similar as possible to the true silvereye's calls to improve the covert performance. The feasibility experiments are carried out in a forest with moderate noise to demonstrate the performance of the proposed covert communication method. The power of the acoustic source is fixed at 30 watts and the communication distance varies from 20 m to 60 m. The bit-error-rate (BER) of two communication modes are 1.98％ and 1.39％ at 60 m, respectively. Finally, the model of communication method is introduced, and the problems that may be encountered in practical applications, as well as solutions and future development directions are analyzed. The feasibility and covert performance of the proposed method are verified in the jungle environment, and the covert information transmission can be realized when radio communication is infeasible.关键词
仿鸟叫声/声学隐蔽通信/绣眼鸟叫声/时频特性/无线电通信Key words
imitating brid calls/acoustic covert communication/silvereye's call/time-frequency characteristics/radio communication引用本文复制引用
蒋佳佳,陆茵,徐俊宇,段发阶,王宪全,刘伟,傅骁..一种基于仿鸟叫声的隐蔽通信方法[J].测试科学与仪器,2023,14(4):387-397,11.基金项目
National Natural Science Foundation of China(Nos.61971307,61905175,51775377) （Nos.61971307,61905175,51775377）
Joint Fund of Ministry of Education for Equipment Pre-research(No.8091B022144) （No.8091B022144）
National Key Research and Development Plan Project(No2020YFB2010800) （No2020YFB2010800）
Fok Ying Tung Education Foundation(No.171055) （No.171055）
Guangdong Province Key Research and Development Plan Project(No.2020B0404030001) （No.2020B0404030001）
Tianjin Science and Technology Plan Project(No.20YDTPJC01660) （No.20YDTPJC01660）
Project of Foreign Affairs Committee of China Aviation Development Sichuan Gas Turbine Research Institute(Nos.GJCZ-2020-0040,GJCZ-2020-0041) （Nos.GJCZ-2020-0040,GJCZ-2020-0041）
