期刊论文

中文

计算机应用研究

1001-3695

2017

34

4

1189-1194

10.3969/j.issn.1001-3695.2017.04.053

31501227:国家自然科学基金 :广东高校省级重点平台 2015KTSCX165:重大科研资助项目

本校为其他机构

针对因特定农业环境下无线信道模型缺乏而造成的现场感知业务的优化与分析难题,建立了油菜大田环境下WSN 信道传播损耗特征模型。以油菜及其生长大田为例,依据不同的生育期提炼出三个典型的测试场景,采用两种载波频率的无线传感器节点测试大田现场的信号损耗值,对测定结果进行了最小二乘法拟合建模,结果表明,供试大田环境下的WSN 信道传播损耗特性与传统的移动信道模型存在较大差异,适合采用多斜率对数阴影衰落经验模型进行表征。以节点的有效传播距离和路径损耗预测值为指标,与free-space、COST321和 Egli 等经典模型比较,对拟合模型进行有效性验证的结果表明,本模型各项指标与实测数据接近,可...

Modeling wireless channel transmission loss characteristics under Crop growth big field environment, is further optimization of on-site sensing method of WSN-based crop growth environmental information, and precondition for further design. Taken oilseed rape and its growth big field as example, according to different growth season, three typical test scenes were chosen. Signal loss value had been tested by wireless sensor node using two kinds of carrier frequency. Test result had been put in a fit modelling with least square method. It shows th...