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《Journal of Applied Acoustics》 2020-02
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Orthogonal discrete frequency coding signal based on random sequence

JIA Jidong;LI Shuqiu;LI Yu;Institute of Acoustics, Chinese Academy of Sciences;University of Chinese Academy of Sciences;Key Laboratory of Science and Technology on Advanced Underwater Acoustic Signal Processing, Chinese Academy of Sciences;  
Given that problems exist in the current design of orthogonal discrete frequency coding signals, such as limited coding length and signal number, a kind of method based on a linear congruential generator, which has strong randomness, is proposed in this paper. Then, the time-Doppler ambiguity function of the designed signal is introduced in detail, the measuring accuracy of time delay and Doppler as well as the orthogonal property is analyzed based on the model proposed in this paper. Signal performances are compared between the paper's method and the one based on chaotic sequences by simulations. The proposed signals present good performances in ambiguity function, better orthogonal quality and the ability to be programmed easily in theory and simulations.
【Fund】: 国家自然科学基金项目(11504402)
【CateGory Index】: TB56
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