A computational method for the rotational loss in the troposcatter propagation is presented because the beams of transceiver’s antenna can not be along the circular path in trans-horizon passive detection. Because of the narrow beams of the transceivers in the troposcatter propagation, a Gauss function pattern of the antennas is assumed. An azimuth term is derived from the scatter receiver power and a path loss formula used for the beam rotation is given in this paper. Comparison with the experimental data presented in the literature, the two have good consistency. The rotational loss is simulated for the case that both antennas of the transmitter and receiver are not oriented on the great circle bearings. The proposed method is able to serve as a reference for designing the passive location system and detection system in the troposcatter trans-horizon propagation.
Zhang Ming-gao. Study on several radio propagation models in ITU-R recommendations[J]. Chinese Journal of Engineering Science, 2000, 2(7): 74-78.
[3]
ITU-R P.617-2, Propagation prediction techniques and data required for the design of trans-horizon radio-relay systems[S]. Geneva: Electronic Publication, 2012.
Hao Ying-chuan, Gan Qi-guang, and Jia Meng-yuan. Application and propagation characteristics analysis of troposcatter communication on islands[J]. Radio Communications Technology, 2014, 40(2): 20-22.
Ye Tian-chao. Research on application of DTR91 troposcatter communication device in island communication [J]. Radio Communications Technology, 2010, 36(1): 58-60.
Chen Xi-hong, Hu Mao-kai, Xue Lun-sheng, et al.. An analysis of OFDM system under troposcatter fading with multi- antenna diversity[J]. Journal of Air Force Engineering University: Natural Science Edition, 2014, 15(1): 53-56.
Zhao Yu-chao, Qin Jian-cun, and Liu Li-zhe. Analysis of roposcatter communication transmission loss prediction methods[J]. Radio Engineering, 2013, 43(3): 61-64.
Xu Song-yi, Chen Chang-jia, and Li Wen-duo. A prediction method of the troposcatter transmission loss with high elevation[J]. Chinese Journal of Radio Science, 2011, 26(3): 528-532.
Liang Jin-bo. An analysis of scatter propagation path loss arising from the elevation of antenna[J]. Chinese Journal of Radio Engineering, 2005, 35(6): 38-39.
Wang Zhi-xian, Xu Han-lin, and Ao Qing. The passive location of TDOA over the horizon based on troposcatter[J]. Electronic Warfare Technology, 2008, 23(5): 18-21.
[14]
杨广平. 微波超视距无源探测关键技术研究[J]. 现代雷达, 2010, 32(6): 1-4.
Yang Guang-ping. A study on key technology of microwave passive OTHR[J]. Chinese Journal of Modern Radar, 2010, 32(6): 1-4.
Qu Fu-yong and Meng Xiang-wei. Source localization using TDOA and FDOA measurements based on constrained total least squares algorithm[J]. Journal of Electronics & Information Technology, 2014, 36(5): 1075-1081.
Zhang Yu-mei,Wang Xin-long, and Wang Yun. Research on automatic alignment technology of antennas in troposcatter communication vehicular stations[J]. Radio Communications Technology, 2009, 35(3): 39-40.
[17]
Chisholm J H, Portmann P A, Debettencourt J T, et al.. Investigations of angular scattering and multipath properties of tropospheric propagation of short radio waves beyond the horizon[J]. Proceeding of the Institute of Raido Engineers, 1955, 43(10): 1317-1335.
