Výsledky vyhľadávania - "Random coding pulse"

Quadrature phase-shift keying modulation with random coding pulse for long-range ϕ-OTDR Autor Li, Peihong, Wang, Yu, Liu, Xin, Bai, Qing, Gao, Yan, Zhang, Hongjuan, Jin, Baoquan

“…Transient effect in erbium-doped fiber amplifier (EDFA) restricts the application of the phase-sensitive optical time-domain reflectometry (ϕ-OTDR) system with…”
Získať plný text

Random coding method for coherent detection φ-OTDR without optical amplifier Autor Li, Peihong, Wang, Yu, Yin, Kang, Liu, Xin, Bai, Qing, Zhang, Hongjuan, Gao, Yan, Jin, Baoquan

“…•Random coding method can bring SNR enhancement without loss of the sensing bandwidth.•The sensing distance can be extended without any light…”
Získať plný text

Online Calibration Method of Sonar Array Receiving Directivity Based on USBL Autor Zhao, Peng, Shi, Wanting, Xie, Jianyu, Sheng, Yongjie, Wang, Yuebing, Wu, Yanqi

“… Linear frequency modulation (LFM) pulse signal and pseudo-random coding pulse signal are selected, and pulse compression method and complex correlation method are used to improve the ranging accuracy and direction finding accuracy, respectively…”
Získať plný text

Random coding method for SNR enhancement of BOTDR Autor Wang, Qinglin, Bai, Qing, Liang, Changshuo, Wang, Yu, Liu, Yuting, Jin, Baoquan

“…A random coding method for a Brillouin optical time domain reflectometer (BOTDR) fiber sensor is proposed. In this method, a series of pulses modulated by…”
Získať plný text