Performance Analysis of Cooperative Sensing over Time-Correlated Rayleigh Channels in Vehicular Environments

• DOI: 10.3390/electronics9061004
• Publication Date: 2020-06-16T17:20:43Z
• Authors: Xiaomin Qian; Li Hao
• Keywords: Independence

Spectrum starvation is a key challenge for wireless services and applications in vehicular networks with serious negative implications traffic safety transportation efficiency. As promising solution, cognitive radio (CR) allows CR-enabled vehicles to access the spectrum holes of primary users (PUs) an opportunistic manner, but requires robust sensing mechanism provide adequate protection PUs. However, highly dynamic environments make increasingly difficult problem. For example, communications are subject multipath fading due vehicle mobility. In this paper, channels considered be time-correlated Rayleigh fading. To facilitate analysis, temporal correlation could classified into complete correlation, partial independence according degree correlation. The performance cooperative scheme investigated soft fusion (SF) hard (HF) approaches. simulation results presented verify our theoretical analysis varying conditions scenarios. indicate that detecting importantly influenced by channel which can improved vehicles’ cooperation.