Mingyu Zhong and Yi Xie, The Application of Hadamard Matrixes in the SNR Enhancement of Optical Time-Domain Reflectometry(OTDR). journal = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology. June 2008, vol. 18(6). 1233 - 1235 [viewed 19 September 2024]. Available from: https://publications.waset.org/pdf/651.