正交頻分復(fù)用水聲通信自適應(yīng)調(diào)制算法
發(fā)布時間:2018-07-22 14:06
【摘要】:分析預(yù)估信道長度對信道估計算法的影響規(guī)律,提出利用水聲通信均衡恢復(fù)信號統(tǒng)計量對信道估計質(zhì)量評估的方法。通過信道長度自適應(yīng)修正機制,實現(xiàn)對未知水聲信道的高精度估計。針對水聲信道造成的正交頻分復(fù)用子載波特性差異,基于信道估計結(jié)果,提出在碼元總速率、能量約束條件下,各個正交頻分復(fù)用子載波速率、功率優(yōu)化分配的自適應(yīng)調(diào)制算法。與傳統(tǒng)的等功率、速率分配算法相比,新算法能夠顯著提升水聲通信系統(tǒng)的誤碼率性能,通過仿真和實地試驗,驗證了研究內(nèi)容的有效性。
[Abstract]:The influence of the estimated channel length on the channel estimation algorithm is analyzed, and the method of evaluating the channel estimation quality by using the equalization recovery signal statistics is proposed. The high precision estimation of the unknown underwater acoustic channel is realized by the adaptive correction mechanism of the channel length. Based on the channel estimation results, the adaptive modulation algorithm of the orthogonal frequency division multiplexing subcarrier rate and power optimal allocation is proposed under the total bit rate and energy constraints. Compared with the traditional equal power and rate allocation algorithm, the new algorithm can significantly improve the BER performance of the underwater acoustic communication system, through simulation and field experiments, The validity of the research content is verified.
【作者單位】: 海軍工程大學(xué)電子工程學(xué)院;海軍704廠有線車間;
【基金】:國家自然科學(xué)基金資助項目(61101205)
【分類號】:TN929.3
[Abstract]:The influence of the estimated channel length on the channel estimation algorithm is analyzed, and the method of evaluating the channel estimation quality by using the equalization recovery signal statistics is proposed. The high precision estimation of the unknown underwater acoustic channel is realized by the adaptive correction mechanism of the channel length. Based on the channel estimation results, the adaptive modulation algorithm of the orthogonal frequency division multiplexing subcarrier rate and power optimal allocation is proposed under the total bit rate and energy constraints. Compared with the traditional equal power and rate allocation algorithm, the new algorithm can significantly improve the BER performance of the underwater acoustic communication system, through simulation and field experiments, The validity of the research content is verified.
【作者單位】: 海軍工程大學(xué)電子工程學(xué)院;海軍704廠有線車間;
【基金】:國家自然科學(xué)基金資助項目(61101205)
【分類號】:TN929.3
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