基于钻柱声波信道的随钻数据V-OFDM传输方法研究

发布时间：2018-04-10 19:48

本文选题：声波传输 + 误码率　；参考：《电子科技大学学报》2017年01期

【摘要】：随钻数据声波传输系统利用声波沿钻柱信道传播,实现井下和地面信息准确高效的实时通信。钻柱信道由钻杆和接箍周期性构成,通过理论分析和建模仿真,得到通阻带交替存在的梳状频谱特性,并采用FIR滤波器逼近,建立信道仿真平台。矢量正交频分复用技术(V-OFDM)可以将多径衰落信道分解为多个矢量子信道,通过加入适量的循环前缀,在消除符号间干扰(ISI)的同时,利用分集增益,可以减小由于信道频谱零点造成的误码,增加系统的鲁棒性。仿真和实测结果表明,该方法在满足低误码率的同时,能降低数据冗余,提高传输效率。
[Abstract]:Data while drilling acoustic transmission system uses acoustic wave to propagate along drill string channel to realize accurate and efficient real-time communication between underground and ground information.The drill string channel is composed of drill pipe and hoop periodically. By theoretical analysis and modeling and simulation, the comb-like spectrum characteristic of alternate pass-stopband is obtained, and the channel simulation platform is established by FIR filter approximation.Vector orthogonal Frequency Division Multiplexing (VOFDM) can decompose multipath fading channels into multiple vector subchannels. By adding an appropriate number of cyclic prefixes, the interference between symbols is eliminated and diversity gain is utilized.It can reduce the error caused by the channel spectrum zero and increase the robustness of the system.The simulation and experimental results show that this method can reduce the data redundancy and improve the transmission efficiency at the same time as the low bit error rate.
【作者单位】：电子科技大学自动化工程学院;
【分类号】：TN92

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