本文選題：P碼 + 慣性系統(tǒng)��； 參考：《中國(guó)慣性技術(shù)學(xué)報(bào)》2014年04期

【摘要】：為滿足復(fù)雜環(huán)境下快速高精度定位的需求,針對(duì)傳統(tǒng)P碼捕獲方法存在信號(hào)檢測(cè)概率與捕獲速率低的問(wèn)題,設(shè)計(jì)了多段重合折疊的P碼處理方法,對(duì)本地碼序列進(jìn)行折疊預(yù)處理,有效增加了相同長(zhǎng)度本地碼的信息利用率,提高相關(guān)運(yùn)算處理效率。提出慣性輔助多段重合折疊的P碼直接捕獲方法,采用慣性輔助信息縮小多普勒頻率搜索范圍,同時(shí)自動(dòng)調(diào)整相關(guān)控制參數(shù),實(shí)現(xiàn)高動(dòng)態(tài)及弱信號(hào)環(huán)境下P碼的快速捕獲。仿真分析表明,此方法能有效提高了P碼捕獲效率,尤其在高動(dòng)態(tài)狀態(tài)下能有效提高對(duì)衛(wèi)星信號(hào)檢測(cè)能力,在載噪比為30~40 dB·Hz的環(huán)境下,利用慣性輔助P碼的方式能使捕獲概率可提高10%,捕獲時(shí)間可減少30%左右。
[Abstract]:In order to meet the need of fast and high precision localization in complex environment, a multi-segment coincident folding P-code processing method is designed to solve the problem of low signal detection probability and acquisition rate in the traditional P-code acquisition method. The folding preprocessing of local code sequences can effectively increase the information utilization rate of local codes of the same length and improve the efficiency of correlation processing. A method of direct acquisition of P-code with inertial auxiliary multi-segment coincidence folding is proposed. The search range of Doppler frequency is reduced by using inertial auxiliary information and the control parameters are adjusted automatically to realize the fast acquisition of P-code in high dynamic and weak signal environment. The simulation results show that this method can effectively improve the efficiency of P-code acquisition, especially in the high dynamic state, the detection ability of satellite signals can be improved effectively, and the carrier to noise ratio is 30 ~ 40 dB Hz. The acquisition probability can be increased by 10% and the acquisition time can be reduced by about 30% by using inertial auxiliary P code.
【作者單位】： 南京航空航天大學(xué)導(dǎo)航研究中心;
【基金】：國(guó)家自然科學(xué)基金(61273057,91016019) 航空科學(xué)基金(20100852010)
【分類號(hào)】：TN961
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本文編號(hào)：1828104