标题：Envelope Level Crossing Rate and Average Fade Duration of Nonisotropic Vehicle-to-Vehicle Ricean Fading Channels
作者：Cheng, Xiang; Wang, Cheng-Xiang; Ai, Bo; Aggoune, Hadi
作者机构：[Cheng, Xiang] Peking Univ, Sch Elect Engn & Comp Sci, Beijing 100871, Peoples R China.; [Wang, Cheng-Xiang] Shandong Univ, Sch Informat Sci & Engn, 更多
通讯作者地址：[Cheng, X]Peking Univ, Sch Elect Engn & Comp Sci, Beijing 100871, Peoples R China.
来源：IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
关键词：Average fade duration (AFD); level crossing rate (LCR); nonisotropic; scattering environments; Ricean fading; vehicle-to-vehicle (V2V); channels
摘要：This paper proposes a generic geometry-based stochastic model for nonisotropic scattering vehicle-to-vehicle (V2V) Ricean fading channels. With the proposed model, the level crossing rate (LCR) and average fade duration (AFD) are derived. The resultant expressions are sufficiently general and subsume many well-known existing LCRs and AFDs as special cases. The derived LCR and AFD are further investigated in terms of some important parameters, e. g., the shape of the scattering region (two-ring or ellipse), mean angle, angle spread, and directions of movement of the Tx and Rx (same or opposite direction). More importantly, in this paper, the impact of the vehicular traffic density on the LCR and AFD for nonisotropic scattering V2V Ricean fading channels is investigated for the first time. Excellent agreement is observed between the theoretical LCRs/AFDs and corresponding measured data, thus demonstrating the validity and utility of the proposed model.