People all over China are learning from Lei Feng now.He is a great example to all of us.He was always ready to help other1and never asked for anything.We should learn from him and try helping2others.I will do my best ...People all over China are learning from Lei Feng now.He is a great example to all of us.He was always ready to help other1and never asked for anything.We should learn from him and try helping2others.I will do my best to help others.First,I will study hard so that I can have more abilities to help others.Second,I will help the poor children,such as giving them books and warm clothes,raising money展开更多
介绍了煤矿井下人员TOA(Time Of Arrival)定位的视距LOS(Line Of Sight)环境和非视距NLOS(Non Line Of Sight)环境的两种数学模型。通过基站接收人载报警仪极化波到达的脉冲响应电平来区分视距信号和非视距信号,在非视距环境中的TOA测...介绍了煤矿井下人员TOA(Time Of Arrival)定位的视距LOS(Line Of Sight)环境和非视距NLOS(Non Line Of Sight)环境的两种数学模型。通过基站接收人载报警仪极化波到达的脉冲响应电平来区分视距信号和非视距信号,在非视距环境中的TOA测量值减去NLOS误差后,把非视距环境TOA定位数学模型转化为视距环境TOA定位数学模型求解。该定位算法结构简单,计算量小。经井下实际测试的分析,其结果与算法值相符且定位精度满足要求。展开更多
文摘People all over China are learning from Lei Feng now.He is a great example to all of us.He was always ready to help other1and never asked for anything.We should learn from him and try helping2others.I will do my best to help others.First,I will study hard so that I can have more abilities to help others.Second,I will help the poor children,such as giving them books and warm clothes,raising money
文摘介绍了煤矿井下人员TOA(Time Of Arrival)定位的视距LOS(Line Of Sight)环境和非视距NLOS(Non Line Of Sight)环境的两种数学模型。通过基站接收人载报警仪极化波到达的脉冲响应电平来区分视距信号和非视距信号,在非视距环境中的TOA测量值减去NLOS误差后,把非视距环境TOA定位数学模型转化为视距环境TOA定位数学模型求解。该定位算法结构简单,计算量小。经井下实际测试的分析,其结果与算法值相符且定位精度满足要求。