摘要
为了提高车辆无线网络的系统性能,引入了脉冲超宽带(IR-UWB)无线技术并研究了链路两跳中继接入条件.由于IR-UWB功率受限,通过分析给出数据链路中继接入条件,提出了低计算复杂度的多链路两跳数据链路中继节点分配算法(DLRA),提高了数据链路传输速率;针对IRUWB车辆链路,采用两跳单中继获得分集增益,同时实现低开销中继接入.对IR-UWB网络并行链路中继接入进行了仿真,仿真结果表明:IR-UWB车辆链路在实行两跳中继接入后,在仿真场学中总体数据传输速率提高了60.6%,改善明显.
Dual-hop relay aided access is studied to improve the system performance of impulse radio ultra wideband（ IR-UWB） inter-vehicle wireless network. As IR-UWB is power limited,relay access conditions of data link are analyzed. At the same time,dual-hop Data Link Relay Assignment（ DLRA） algorithm with low computational complexity is proposed to improve transmission rate of data link. For IRUWB vehicles link,dual-hop single relay is adopted to obtain a considerable diversity gain while realizing a low occupancy of relay access. Parallel link relay access of IR-UWB network is simulated. The simulation results show that IR-UWB inter-vehicle dual-hop single relay has increased the performance by 60.6%.
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2015年第6期103-107,共5页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
科技部"科技支撑"资助项目(2014BAG01B04-04-2)
关键词
车辆无线网络
脉冲超宽带
中继接入
两跳
inter-vehicle wireless network
impulse radio ultra wideband（IR-UWB）
relay aided access
dual-hop
