本文選題：聲波傳輸 + 誤碼率�。� 參考：《電子科技大學學報》2017年01期

【摘要】：隨鉆數(shù)據聲波傳輸系統(tǒng)利用聲波沿鉆柱信道傳播,實現(xiàn)井下和地面信息準確高效的實時通信。鉆柱信道由鉆桿和接箍周期性構成,通過理論分析和建模仿真,得到通阻帶交替存在的梳狀頻譜特性,并采用FIR濾波器逼近,建立信道仿真平臺。矢量正交頻分復用技術(V-OFDM)可以將多徑衰落信道分解為多個矢量子信道,通過加入適量的循環(huán)前綴,在消除符號間干擾(ISI)的同時,利用分集增益,可以減小由于信道頻譜零點造成的誤碼,增加系統(tǒng)的魯棒性。仿真和實測結果表明,該方法在滿足低誤碼率的同時,能降低數(shù)據冗余,提高傳輸效率。
[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.
【作者單位】： 電子科技大學自動化工程學院;
【分類號】：TN92

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