无线电工程
無線電工程
무선전공정
RADIO ENGINEERING OF CHINA
2014年
5期
40-43,51
,共5页
全球卫星导航定位系统%二元偏移载波调制%码跟踪环路%鉴相器
全毬衛星導航定位繫統%二元偏移載波調製%碼跟蹤環路%鑒相器
전구위성도항정위계통%이원편이재파조제%마근종배로%감상기
global navigation satellite system%binary offset carrier modulation%code tracking loop%discriminator
针对同阶二元偏移载波调制卫星导航信号，提出一种高效新算法解决信号跟踪中的模糊性。分析了同阶二元偏移载波调制原理、信号跟踪模糊性及解决方法，利用本地扩频码与接收信号的相关函数特点，构建了码跟踪环路鉴相曲线，选择了合适的相关间距作为符号判决，联合构成鉴相器，推导了算法设计的正确性，给出了实现架构。仿真结果表明，码相位捕获误差±0?9个码片内均可正确跟踪。该方法可进一步应用于全球卫星导航系统新体制信号的接收处理。
針對同階二元偏移載波調製衛星導航信號，提齣一種高效新算法解決信號跟蹤中的模糊性。分析瞭同階二元偏移載波調製原理、信號跟蹤模糊性及解決方法，利用本地擴頻碼與接收信號的相關函數特點，構建瞭碼跟蹤環路鑒相麯線，選擇瞭閤適的相關間距作為符號判決，聯閤構成鑒相器，推導瞭算法設計的正確性，給齣瞭實現架構。倣真結果錶明，碼相位捕穫誤差±0?9箇碼片內均可正確跟蹤。該方法可進一步應用于全毬衛星導航繫統新體製信號的接收處理。
침대동계이원편이재파조제위성도항신호，제출일충고효신산법해결신호근종중적모호성。분석료동계이원편이재파조제원리、신호근종모호성급해결방법，이용본지확빈마여접수신호적상관함수특점，구건료마근종배로감상곡선，선택료합괄적상관간거작위부호판결，연합구성감상기，추도료산법설계적정학성，급출료실현가구。방진결과표명，마상위포획오차±0?9개마편내균가정학근종。해방법가진일보응용우전구위성도항계통신체제신호적접수처리。
A new effective unambiguous tracking method is designed for resolving the problem caused by multi-correlation peaks in same order Binary Offset Carrier (BOC) satellite navigation signals.The principle of the same order BOC signal modulation,signal tracking ambiguity and solution are analyzed. A new type curve of discriminator for code tracking loop is constructed with correlation between spread code and received BOC signal.The code chip correlation space is selected and used as sign judgment,and the code discriminator is formed.The arithmetic is deduced and realization construction is shown.The simulation results show that the signals can be tracked correctly with code phase acquisition error in ±0.9 chip.The method can be applied to new system signals receiving process in global navigation satellite system.
