本文關(guān)鍵詞：UUV平臺(tái)OFDM水聲通信時(shí)變多普勒跟蹤與補(bǔ)償算法　出處：《儀器儀表學(xué)報(bào)》2017年07期 　論文類(lèi)型：期刊論文

  更多相關(guān)文章： 無(wú)人水下航行器 水聲通信 正交頻分復(fù)用 時(shí)變多普勒跟蹤 多普勒快速補(bǔ)償

【摘要】：針對(duì)傳統(tǒng)多普勒估計(jì)和補(bǔ)償算法在基于無(wú)人水下航行器(UUV)的正交頻分復(fù)用(OFDM)水聲移動(dòng)通信中難以準(zhǔn)確跟蹤時(shí)變多普勒因子并對(duì)其進(jìn)行快速實(shí)時(shí)補(bǔ)償?shù)娜毕?提出了一種基于時(shí)頻聯(lián)合搜索的新的多普勒跟蹤與快速補(bǔ)償算法。利用梳狀導(dǎo)頻結(jié)合頻域變采樣技術(shù)搜索OFDM符號(hào)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(duì)信道估計(jì)結(jié)果進(jìn)行稀疏度評(píng)估,選擇稀疏度最佳的信道響應(yīng)對(duì)應(yīng)的多普勒估計(jì)對(duì)信號(hào)進(jìn)行快速補(bǔ)償。經(jīng)蒙特卡洛仿真及海試試驗(yàn)證明,該方法能夠有效實(shí)現(xiàn)對(duì)基于UUV平臺(tái)的時(shí)變多普勒實(shí)時(shí)追蹤和快速補(bǔ)償,保證穩(wěn)健的OFDM水聲移動(dòng)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(guó)科學(xué)院聲學(xué)研究所;中國(guó)科學(xué)院大學(xué);
【基金】：國(guó)家自然科學(xué)基金(11504402,11304343)項(xiàng)目資助
【分類(lèi)號(hào)】：TN929.3
【正文快照】： 1引言無(wú)人水下航行器(unmanned underwater vehicle,UUV)具有智能性、隱蔽性、機(jī)動(dòng)性、經(jīng)濟(jì)性等特點(diǎn),并且重量輕、尺寸小,使用方便,具有廣闊的經(jīng)濟(jì)和工業(yè)價(jià)值[1-2]。UUV與基站之間所進(jìn)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(hào)：1397941