本文關(guān)鍵詞：UUV平臺OFDM水聲通信時變多普勒跟蹤與補償算法　出處：《儀器儀表學報》2017年07期 　論文類型：期刊論文

  更多相關(guān)文章： 無人水下航行器 水聲通信 正交頻分復用 時變多普勒跟蹤 多普勒快速補償

【摘要】：針對傳統(tǒng)多普勒估計和補償算法在基于無人水下航行器(UUV)的正交頻分復用(OFDM)水聲移動通信中難以準確跟蹤時變多普勒因子并對其進行快速實時補償?shù)娜毕?提出了一種基于時頻聯(lián)合搜索的新的多普勒跟蹤與快速補償算法。利用梳狀導頻結(jié)合頻域變采樣技術(shù)搜索OFDM符號在不同多普勒因子下的信道頻域響應(yīng),借助匹配追蹤技術(shù)對信道估計結(jié)果進行稀疏度評估,選擇稀疏度最佳的信道響應(yīng)對應(yīng)的多普勒估計對信號進行快速補償。經(jīng)蒙特卡洛仿真及海試試驗證明,該方法能夠有效實現(xiàn)對基于UUV平臺的時變多普勒實時追蹤和快速補償,保證穩(wěn)健的OFDM水聲移動通信。
[Abstract]:Orthogonal Frequency Division Multiplexing (OFDM) based on UUV for traditional Doppler estimation and compensation algorithm. In underwater acoustic mobile communication, it is difficult to track the time-varying Doppler factor accurately and to compensate it in real time. A new Doppler tracking and fast compensation algorithm based on time-frequency joint search is proposed. Comb-like pilot combined with frequency-domain variable sampling technique is used to search the channel frequency response of OFDM symbols under different Doppler factors. The channel estimation results are evaluated by matching tracking technique, and the Doppler estimation corresponding to the optimal channel sparsity is selected to compensate the signal quickly, which is proved by Monte Carlo simulation and sea test. This method can effectively realize real-time tracking and fast compensation of time-varying Doppler based on UUV platform and ensure robust OFDM underwater acoustic mobile communication.
【作者單位】： 中國科學院聲學研究所;中國科學院大學;
【基金】：國家自然科學基金(11504402,11304343)項目資助
【分類號】：TN929.3
【正文快照】： 1引言無人水下航行器(unmanned underwater vehicle,UUV)具有智能性、隱蔽性、機動性、經(jīng)濟性等特點,并且重量輕、尺寸小,使用方便,具有廣闊的經(jīng)濟和工業(yè)價值[1-2]。UUV與基站之間所進行的可靠的信息傳輸是UUV能夠完成所執(zhí)行任務(wù)的必要保征,然而在水聲信道環(huán)境中,可利用于通信，

本文編號：1397941