【摘要】：車載移動通信中信噪比與Doppler頻移對通信質(zhì)量有重要影響.本文探究了基于迭代自相關(guān)函數(shù)的Doppler頻移估計算法,指出其在高車速環(huán)境下估計誤差較大,提出了一種插值改進方法以改善高車速時的Doppler頻移估計.最后根據(jù)迭代Doppler頻移估計在不同迭代環(huán)節(jié)具有不同估計誤差這一特性,提出了基于Doppler頻移估計誤差比的信噪比估計算法.計算機仿真結(jié)果表明,所提出的算法在一般通信系統(tǒng)的工作信噪比與車速范圍內(nèi)均有較好的估計性能,最高仿真車速達到了300 km/h.
[Abstract]:The signal-to-noise ratio (SNR) and Doppler frequency shift have an important effect on the communication quality in vehicular mobile communication. In this paper, the Doppler frequency shift estimation algorithm based on iterative autocorrelation function is studied. It is pointed out that the estimation error is large in high speed environment. An improved interpolation method is proposed to improve the Doppler frequency shift estimation at high speed. Finally, according to the characteristic that iterative Doppler frequency shift estimation has different estimation errors in different iterations, a signal-to-noise ratio estimation algorithm based on Doppler frequency shift estimation error ratio is proposed. The computer simulation results show that the proposed algorithm has good estimation performance in the operating signal-to-noise ratio (SNR) and the speed range of the general communication system, and the maximum simulation speed is up to 300 km/h..
【作者單位】： 浙江工業(yè)大學(xué)信息工程學(xué)院;
【基金】：國家自然科學(xué)基金(批準(zhǔn)號:61471322)資助項目
【分類號】：TN929.5;U463.67

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1 李根深;基于移動通信的警車指揮系統(tǒng)終端機設(shè)計[D];吉林大學(xué);2014年

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本文編號：2411925