摘要
无线信道的质量在很大程度上制约着无线通信系统的质量,发射机到接收机之间的信号传播路径从简单的视距,到遭遇各种各样的地形物。不同环境下的无线电传播模型研究一直是通信方面的热点,文章针对校园休闲区环境无线网络应用需求,开展了无线信道路径损耗建模适用性分析。首先利用WSN节点进行2.4GHz无线信道的实时测试,得到不同传播距离上的信号损耗值,然后与自由空间模型,单、双折线对数距离路径损耗模型进行了对比分析,最后通过对比分析发现改进后双折线对数距离路径损耗模型更适用于此环境。
The quality of wireless communication system is deeply limited to the quality of wireless channel, the transmit- ter- to-receiver signal propagation path from a simple line of sight to a variety of terrain. The study of radio propagation model in different environments has always been a hotspot in communication. In this paper, the applicability of wireless channel path loss modeling is carried out for the application of environment wireless network in campus recreation area. Firstly, WSN nodes are used to test the 2.4GHz wireless channel in real time. The signal loss values at different propaga-tion distances are obtained. Then, the logarithmic distance path loss model of single and double fold lines is compared with the free space propagation model. Finally, The posterior bilinear line logarithmic distance path loss model is more suitable for this environment.
出处
《信息通信》
2017年第11期20-22,共3页
Information & Communications
基金
宁夏自然科学基金:编号NZ17051
关键词
无线信道
校园休闲区
路径损耗
对数距离模型
wireless channel
campus recreation area
path loss
logarithmic distance model
