本文選題：二進(jìn)制偏移載波 + 碼跟蹤誤差��； 參考：《計算機(jī)仿真》2016年11期

【摘要】：為了高效利用有限的導(dǎo)航頻帶資源以及更好的與其它導(dǎo)航系統(tǒng)兼容,提高導(dǎo)航定位精度,提出北斗二代衛(wèi)星導(dǎo)航系統(tǒng)將采用BOC(Binary Offset Carrier)族調(diào)制方式來取代目前使用的QPSK調(diào)制方式。針對北斗B1、B2和B3頻段信號,深入分析了信號特征及相應(yīng)的具體調(diào)制方式,推導(dǎo)了相應(yīng)頻段調(diào)制信號的自相關(guān)函數(shù)和功率譜密度,從均方根帶寬、碼跟蹤誤差、多徑包絡(luò)誤差和捕獲精度等角度測試,評估北斗BOC族調(diào)制信號的性能,并與GPS C/A碼信號進(jìn)行對比。仿真結(jié)果表明,北斗二代BOC族調(diào)制信號捕獲靈敏度低,但在碼跟蹤精度和多徑誤差等方面具有明顯的優(yōu)勢,且具有頻譜分離特性,可以有效的利用和共享頻段資源。
[Abstract]:In order to make efficient use of limited navigation frequency band resources and better compatibility with other navigation systems and improve navigation positioning accuracy, it is proposed that Beidou second generation satellite navigation system will adopt BOC(Binary Offset Carrier family modulation to replace the current QPSK modulation. For the Beidou B1B2 and B3 band signals, the characteristics of the signals and the corresponding modulation modes are analyzed in depth. The autocorrelation function and power spectral density of the modulated signals in the corresponding frequency bands are derived. The root mean square bandwidth and code tracking errors are derived. The performance of Beidou BOC family modulation signal is evaluated by the angle measurement of multi-path envelope error and acquisition accuracy, and compared with that of GPS C / A code signal. The simulation results show that the Beidou second generation BOC family has low acquisition sensitivity, but it has obvious advantages in code tracking accuracy and multipath error, and has the characteristics of spectrum separation, which can effectively utilize and share the frequency band resources.
【作者單位】： 大連大學(xué)信息工程學(xué)院;
【基金】：遼寧省教育廳科學(xué)研究項(xiàng)目(L2013461)
【分類號】：TN967.1
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本文編號：1991698