基于局部相關(guān)函數(shù)插值的二進(jìn)制偏移載波調(diào)制信號(hào)碼相位估計(jì)與鑒相方法

李文剛; 王屹偉

doi:10.11999/JEIT170506

基于局部相關(guān)函數(shù)插值的二進(jìn)制偏移載波調(diào)制信號(hào)碼相位估計(jì)與鑒相方法

doi: 10.11999/JEIT170506

李文剛¹,
王屹偉¹

基金項(xiàng)目:

國(guó)家自然科學(xué)基金(61201136)，高等學(xué)校學(xué)科創(chuàng)新引智計(jì)劃(B08038)

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出版歷程
- 收稿日期: 2017-05-26
- 修回日期: 2017-10-05
- 刊出日期: 2018-03-19

Code Phase Estimate and Discrimination Method for BOC Modulated Signal Based on Partial Correlation Function Interpolation

LI Wengang¹,
WANG Yiwei¹

Funds:

The National Natural Science Foundation of China (61201136), The Plan of Introducing Talents for Discipline Innovation in Universities (B08038)

摘要

摘要: 為了進(jìn)一步提高衛(wèi)星導(dǎo)航接收機(jī)對(duì)BOC(1,1)及其衍生類型調(diào)制信號(hào)的碼鑒相的質(zhì)量和跟蹤能力，尤其是在高動(dòng)態(tài)下的跟蹤性能。該文提出一種基于局部相關(guān)函數(shù)插值的方法確定BOC(1,1)調(diào)制信號(hào)的碼相位。該方法基于相關(guān)器陣列的結(jié)構(gòu)，根據(jù)相關(guān)器陣列的輸出值判斷相關(guān)峰值的大致范圍。利用廣義延拓逼近的方法估計(jì)碼相位的位置，同時(shí)在缺少延拓空間的情況下構(gòu)造一個(gè)虛擬的相關(guān)器以完成對(duì)碼相位的估計(jì)。該文具體分析了單側(cè)相關(guān)器個(gè)數(shù)對(duì)牽入范圍的影響，在此基礎(chǔ)上對(duì)所提方法進(jìn)行了計(jì)算機(jī)仿真實(shí)驗(yàn)。理論和仿真證明：所提方法能夠在不增加過多硬件資源的條件下擴(kuò)大碼鑒相函數(shù)的線性牽入范圍，進(jìn)而能夠提高接收機(jī)對(duì)于BOC調(diào)制信號(hào)的跟蹤精度。
- 衛(wèi)星導(dǎo)航 /
- 擴(kuò)頻碼鑒相 /
- 跟蹤 /
- BOC調(diào)制信號(hào) /
- 廣義延拓逼近
Abstract: In order to further improve the BOC (1,1) and its derived types modulated signals code discrimination quality and tracking ability of the satellite navigation receiver, especially in high dynamic. This paper proposes a method to determine the BOC (1,1) modulated signal code phase by partial correlation function interpolation. This method is based on the structure of correlators array, the approximate range of the correlation peak is determined by the correlators output. The generalized extended approximation method is used to estimate the code phase, and a virtual correlator is created in order to process the generalized extended approximation when the extended range does not exist. In this paper, the influence of the one side correlators number N on the linear pull-in region is analyzed in detail. On this basis, the computer simulation experiment for the proposed method is given. Theoretical and simulation results show: the proposed method can be used to enlarge the linear pull-in region of phase discrimination function without adding too much hardware resources, furthermore, it can improve the BOC modulated signals tracking accuracy for the receiver.
- Satellite navigation /
- Code phase discrimination /
- Tracking /
- Binary Offset Carrier (BOC) modulated signal /
- Generalized extened approximation

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