无线电工程
無線電工程
무선전공정
RADIO ENGINEERING OF CHINA
2011年
10期
37-39
,共3页
许仕龙%李斌%李哲%田爱国
許仕龍%李斌%李哲%田愛國
허사룡%리빈%리철%전애국
高灵敏度%室内%导航%GPS
高靈敏度%室內%導航%GPS
고령민도%실내%도항%GPS
high sensitivity%indoor environment%navigation%GPS
为了实现在室内和城市等低信噪比环境下的全球定位系统（GPS）导航,介绍了导航终端捕获卫星信号的基本原理。分析了相干积分算法、非相干积分算法、差分相关算法和圆周相关算法4种主要的卫星捕获算法,在此基础上提出了相干积分算法结合差分相关算法的高灵敏度GPS导航芯片设计方案。通过仿真分析,该芯片能够在15 dBHz的低载噪比环境下实现对卫星信号的正常捕获。
為瞭實現在室內和城市等低信譟比環境下的全毬定位繫統（GPS）導航,介紹瞭導航終耑捕穫衛星信號的基本原理。分析瞭相榦積分算法、非相榦積分算法、差分相關算法和圓週相關算法4種主要的衛星捕穫算法,在此基礎上提齣瞭相榦積分算法結閤差分相關算法的高靈敏度GPS導航芯片設計方案。通過倣真分析,該芯片能夠在15 dBHz的低載譟比環境下實現對衛星信號的正常捕穫。
위료실현재실내화성시등저신조비배경하적전구정위계통（GPS）도항,개소료도항종단포획위성신호적기본원리。분석료상간적분산법、비상간적분산법、차분상관산법화원주상관산법4충주요적위성포획산법,재차기출상제출료상간적분산법결합차분상관산법적고령민도GPS도항심편설계방안。통과방진분석,해심편능구재15 dBHz적저재조비배경하실현대위성신호적정상포획。
In order to realize GPS navigation in low SNR environment,such as indoor and city environments,the basic principle of signal acquisition in navigation receiver is introduced.Several common acquisition methods of satellite signal such as coherent integration,non-coherent integration,differential correlation integration and circular correlation integration are analyzed.Coherent integration and differential correlation integration are chosen finally to design the high sensitivity GPS chip,and the results of simulation demonstrate that the normal acquisition for satellite signal can be successfully implemented by using this chip in such 15 dBHz CNR environment.
