(北京航空航天大學 電子信息工程學院,北京 100191)
摘要:簡要介紹了GPS捕獲原理以及并行碼相位搜索捕獲算法,并在此基礎上編寫了基于LabVIEW的GPS信號捕獲程序。在考慮到算法實現所需時間和涉及計算量的前提下,采用了計算量較少,捕獲時間較短的并行碼相位搜索算法;贚abVIEW的并行碼相位捕獲搜索算法實現的捕獲程序不僅實現了粗捕獲,而且加入了精捕獲的程序,使得對載波頻率的估計更加的準確?蓴U展應用于北斗、伽利略等其它導航衛星的信號捕獲。
關 鍵 詞:LabVIEW;GPS;并行碼相位搜索;載波頻率;捕獲
中圖分類號:V 文獻標識碼:A 文章編號:
Implementation of GPS Signal Acquisition Algorithm
Based on LABVIEW
WANG Qi-bo, Qin Hong-lei, WANG Geng-ke
(School of Electronic and Information Engineering, Beihang University, Beijing 100191, China, WANG Qibo)
Abstract: The Principle of GPS signal acquisition and algorithm of parallel code phase search are simply introduced, and then program the GPS signal Acquisition. Based on the requirements of short time required and little computation of implementation about algorithm,the algorithm of parallel code phase search acquisition is adopted here. Implementation of GPS Signal Acquisition Algorithm based on LABVIEW not only implements coarse acquisition, and joined the process of detail acquisition, makes the estimation of carrier frequency more accurately. All these methods can be extended to signal acquisition of navigation equipment such as BEIDOU and Galileo.
Key words:LabVIEW; GPS; parallel code phase search; carrier frequency; acquisition
參考文獻 (References)
謝鋼.GPS原理與接收機設計[M] .北京:電子工業出版社,2009:349-375.
陳軍,潘高峰.GPS軟件接收機基礎[M].北京:電子工業出版社,2008:108—133.
陳熙源,張昆鵬.基于MATLAB的GPS軟件接收機捕獲與跟蹤算法實現[J].中國慣性技術學報,2007,15(4):423—426.
陳希,張銳,帥濤.基于FFT的GPS快速并行捕獲算法[J].宇航學報,2011,32(1):162—166.
徐曉蘇,范金洋.GPS軟件接收機捕獲算法[J].中國慣性技術學報,2009,17(2):165—169.
作者簡介:
王奇波,男,漢族,1983年出生,碩士研究生,現就讀于北京航空航天大學電子信息工程學院,主要從事航空與衛星導航技術研究。