本文選題：動(dòng)中通系統(tǒng)　切入點(diǎn)：載波頻率跟蹤　出處：《西安電子科技大學(xué)學(xué)報(bào)》2017年04期

【摘要】：為了提高車載動(dòng)中通系統(tǒng)對(duì)衛(wèi)星信標(biāo)信號(hào)的頻率跟蹤精度,提出了利用一元廣義延拓逼近實(shí)現(xiàn)鎖頻環(huán)鑒頻器的算法.該算法通過(guò)對(duì)衛(wèi)星信標(biāo)信號(hào)功率譜樣點(diǎn)域進(jìn)行單元?jiǎng)澐?在保證樣點(diǎn)域節(jié)點(diǎn)處滿足插值條件的前提下,實(shí)現(xiàn)單元域內(nèi)的最佳擬合,能夠有效地提升整域內(nèi)的逼近精度.通過(guò)對(duì)亞洲3s衛(wèi)星信標(biāo)信號(hào)的靜態(tài)和動(dòng)態(tài)跟蹤,證實(shí)該算法具有很好的動(dòng)態(tài)跟蹤性能,在40ms積分時(shí)間內(nèi),可使頻率跟蹤誤差限制在±2Hz以內(nèi),有效地提升了載波頻率跟蹤環(huán)路的跟蹤精度.一元廣義延拓逼近頻率跟蹤算法的數(shù)學(xué)模型穩(wěn)健,復(fù)雜度低,在保證動(dòng)態(tài)性能和較高跟蹤精度的前提下,具有很好的可實(shí)現(xiàn)性.
[Abstract]:In order to improve the accuracy of frequency tracking of satellite beacon signals by vehicle moving midway system, an algorithm of frequency locked loop frequency discriminator based on univariate generalized continuation approximation is proposed.By dividing the power spectrum sample domain of the satellite beacon signal into units, the algorithm realizes the best fitting in the unit domain on the premise that the node in the sample domain satisfies the interpolation condition, and can effectively improve the approximation accuracy in the whole domain.Through static and dynamic tracking of 3s satellite beacons in Asia, it is proved that the algorithm has good dynamic tracking performance, and the frequency tracking error can be limited to 鹵2Hz within the 40ms integral time.The tracking accuracy of carrier frequency tracking loop is improved effectively.The mathematical model of the one-variable generalized continuation approximation frequency tracking algorithm is robust and low complexity. It has good realizability on the premise of ensuring the dynamic performance and high tracking accuracy.
【作者單位】： 中國(guó)科學(xué)院國(guó)家天文臺(tái);中國(guó)科學(xué)院大學(xué);廣西精密導(dǎo)航技術(shù)與應(yīng)用重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(11603041) 廣西精密導(dǎo)航技術(shù)與應(yīng)用重點(diǎn)實(shí)驗(yàn)室資助項(xiàng)目
【分類號(hào)】：TN927.2

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