摘要
针对传统中继选择技术复杂度过高的问题,提出一种基于局部信道信息和非正交传输的中继选择方案。该方案仅利用源节点和各中继节点之间的信道状态信息选择最佳中继,从而显著降低了系统开销;此外,通过引入非正交设计以获取分集增益并改善误码性能。数值结果表明,与传统方案相比,本方法在中高信噪比条件下能够使系统的中断概率和误比特率均降低一个数量级。
The implementation complexity of the traditional relay selection strategies is too high to be affordable. To solve this problem, this paper proposed a novel relay selection scheme based on partial channel state information （CSI） and non-orthogonal signaling. In this scheme, only the CSI regarding the source-relay links was exploited to select the best relay. Besides that, it introduced the non-orthogonal design to harvest the diversity gain and improved the error performance. Numerical results demonstrate that, compared to the traditional candidates, the proposed method can lower the system outage probability and the bit error probability by an order in medium to high signal-to-noise （SNR） regions.
出处
《计算机应用研究》
CSCD
北大核心
2015年第12期3786-3789,共4页
Application Research of Computers
基金
国家自然科学基金资助项目(61201207)
国家科技重大专项资助项目(2012ZX03001032-002)
关键词
车联网
中继选择
信道状态信息
非正交传输
中断概率
数值仿真
vehicular networks
relay selection
channel state information
non-orthogonal signaling
outage probability
numerical analysis
