矿井环境下基于MB-OFDM的UWB系统建模及性能分析  

Modeling of UWB System Based on MB-OFDM in Coal Mine Environment and Its Performance Analysis

作　　者：王鑫[1] 孙彦景[1] 钱建生[1] 

机构地区：[1]中国矿业大学信电学院,江苏徐州221008

出　　处：《工矿自动化》2010年第5期43-47,共5页Journal Of Mine Automation

基　　金：江苏省高新技术重大项目(BG2007012);中国矿业大学科技基金项目(OC080303)

摘　　要：针对超宽带无线通信系统UWB在矿井环境下的多径传播所造成的频率选择性衰落,提出将具有抗多径时延等优势的多频带正交频分复用技术MB-OFDM应用到井下UWB系统中。为了弥补S-V模型在信道衰落环境下的不足,将传统的信道冲击响应转换为一个独立的角度脉冲响应,建立一个基于修正的信道模型。结合修正的信道模型,对基于MB-OFDM的矿井UWB系统进行建模,给出了频带的划分方式、信道的改造办法、无线系统的设计方案等。在矿井复杂环境下对系统模型进行性能分析仿真,结果表明,该系统能有效抵抗多径衰落,具有抗噪声能力强、误码率低、覆盖范围远等优点。For frequency selective fading of UWB wireless commurtication system caused by multi-path spread in coal mine environment,appling MB-OFDM technology with advantage of anti-multipath delay in underground UWB system was proposed.In order to make up for traditional S-V model＇s defect in fading channels,traditional channel impulse response was changed into an independent angle impluse response,and a revised channel model was built.With the revised channel model,a model of UWB system based on MB-OFDM was built,and the band division scheme,reform approach for channel and design scheme of wireless system were given.The model of the system was simulated in complex coal mine environment and the results showed that the system can be effective against multi-path fading and has high anti-noise ability,low bit-error rate,and large coverage range.

关 键 词：矿井 超宽带 无线通信 频率选择性衰落 多频带正交频分复用 角度脉冲 信道模型 系统建模 

分 类 号：TD655[矿业工程—矿山机电] TN925[电子电信—通信与信息系统]