摘要
分析无线信号在不同环境下的信道传播特性常用的方法有统计学建模法和实际测量法,其中,实际测量法需要借助专业的测量工具。针对无线信道传输特性分析的实际需求,利用基于扩频滑动相关方法来获取信道冲激响应的原理,分析了4种常用伪随机序列的相关特性,提出利用恒包络零自相关(Constant Amplitude Zero Auto-Correlation,CAZAC)序列进行冲激响应测量的基本方法并搭建了系统架构,然后设计了无线信道特性实时探测系统。最后,通过多通道信道模拟器验证了设计系统的可靠性,并通过室内和室外的实测验证了所提方法的有效性和系统设计的可行性。
Commonly used methods for analyzing channel propagation characteristics of wireless signals in different environments include statistical modeling and actual measurement,and the actual measurement requires professional measurement tools.In view of the actual needs of wireless channel transmission characteristics analysis,this paper uses the principle of channel impulse response based on spread spectrum sliding correlation method.By analyzing the correlation characteristics of four commonly used pseudorandom sequences,this paper proposes a basic method for impulse response measurement using CAZAC(Constant Amplitude Zero Auto-Correlation)sequences and builds system architecture.Then,it designs a real-time detection system for wireless channel characteristics.Finally,the reliability of the designed system is verified by a multi-channel channel simulator,and the effectiveness of the proposed method and the feasibility of the system design are verified by indoor and outdoor measurements.
作者
周继航
王满喜
ZHOU Jihang;WANG Manxi(Unit 63892 of PLA,Luoyang Henan 471000,China)
出处
《通信技术》
2023年第3期363-370,共8页
Communications Technology
关键词
无线信道
信道测量
多径信息
扩频序列
滑动相关
wireless channel
channel measurement
multipath information
spread spectrum sequence
