基于局部相關函數插值的二進制偏移載波調制信號碼相位估計與鑒相方法

李文剛; 王屹偉

doi:10.11999/JEIT170506

基于局部相關函數插值的二進制偏移載波調制信號碼相位估計與鑒相方法

doi: 10.11999/JEIT170506 cstr: 32379.14.JEIT170506

李文剛¹,
王屹偉¹

基金項目:

國家自然科學基金(61201136)，高等學校學科創(chuàng)新引智計劃(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: 為了進一步提高衛(wèi)星導航接收機對BOC(1,1)及其衍生類型調制信號的碼鑒相的質量和跟蹤能力，尤其是在高動態(tài)下的跟蹤性能。該文提出一種基于局部相關函數插值的方法確定BOC(1,1)調制信號的碼相位。該方法基于相關器陣列的結構，根據相關器陣列的輸出值判斷相關峰值的大致范圍。利用廣義延拓逼近的方法估計碼相位的位置，同時在缺少延拓空間的情況下構造一個虛擬的相關器以完成對碼相位的估計。該文具體分析了單側相關器個數對牽入范圍的影響，在此基礎上對所提方法進行了計算機仿真實驗。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大碼鑒相函數的線性牽入范圍，進而能夠提高接收機對于BOC調制信號的跟蹤精度。
- 衛(wèi)星導航 /
- 擴頻碼鑒相 /
- 跟蹤 /
- BOC調制信號 /
- 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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參考文獻(25)

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