[2] Radiocommunication Sect of ITU. Recommendation ITUR P. 37212—Radio noise[R]. Geneva: International Telecommunication Union, 2015: 1316.
[3] Coleman C J. Noise the choice of antenna in HF communications[C]Proceedings of the 10th IET International Conference on Ionospheric Radio Systems Techniques. 2006: 321325.
[6] Iwama M. Estimation of background noise in HFb[C]AsiaPacific Symposium on Electromagic Compatibility 19th International Zurich Symposium on Electromagic Compatibility. 2008: 478481.