西安理工大学学报
西安理工大學學報
서안리공대학학보
Journal of Xi'an University of Technology
2015年
3期
328-334
,共7页
GPS%集员滤波%UBB%多普勒频率%载波跟踪环路
GPS%集員濾波%UBB%多普勒頻率%載波跟蹤環路
GPS%집원려파%UBB%다보륵빈솔%재파근종배로
GPS%set membership filter%UBB%Doppler frequency%carrier tracking loop
GPS接收机在高动态情况下，载波信号受到不同类型复杂噪声的干扰，且很难获得这些噪声的统计特性，而传统方法对噪声的处理都是假定其统计特性已知，因此，本文提出了一种基于集员滤波（SMF）的解决方案。该方法首先将噪声定义成一类未知但有界（UBB）噪声，然后利用椭球包含UBB噪声集合及状态集合，进而采用集员滤波的方法实现了载波信号的多普勒频率估计，最后通过Matlab仿真验证该算法的有效性，并与传统方法进行比较。较传递函数设计的 PLL设计方法，提高了环路的动态适应性和精度；较 Kalman滤波方法，提高了环路的鲁棒性和快速性。集员滤波为GPS接收机载波跟踪环路的设计提供了新的思路。
GPS接收機在高動態情況下，載波信號受到不同類型複雜譟聲的榦擾，且很難穫得這些譟聲的統計特性，而傳統方法對譟聲的處理都是假定其統計特性已知，因此，本文提齣瞭一種基于集員濾波（SMF）的解決方案。該方法首先將譟聲定義成一類未知但有界（UBB）譟聲，然後利用橢毬包含UBB譟聲集閤及狀態集閤，進而採用集員濾波的方法實現瞭載波信號的多普勒頻率估計，最後通過Matlab倣真驗證該算法的有效性，併與傳統方法進行比較。較傳遞函數設計的 PLL設計方法，提高瞭環路的動態適應性和精度；較 Kalman濾波方法，提高瞭環路的魯棒性和快速性。集員濾波為GPS接收機載波跟蹤環路的設計提供瞭新的思路。
GPS접수궤재고동태정황하，재파신호수도불동류형복잡조성적간우，차흔난획득저사조성적통계특성，이전통방법대조성적처리도시가정기통계특성이지，인차，본문제출료일충기우집원려파（SMF）적해결방안。해방법수선장조성정의성일류미지단유계（UBB）조성，연후이용타구포함UBB조성집합급상태집합，진이채용집원려파적방법실현료재파신호적다보륵빈솔고계，최후통과Matlab방진험증해산법적유효성，병여전통방법진행비교。교전체함수설계적 PLL설계방법，제고료배로적동태괄응성화정도；교 Kalman려파방법，제고료배로적로봉성화쾌속성。집원려파위GPS접수궤재파근종배로적설계제공료신적사로。
In high dynamic condition,the carrier signal of GPS is interfered by different kinds of complex noises,and it is very difficult to obtain the statistic characteristics of the noise,but the traditional method is assumed that the statistic properties of the noise is known,accordingly,this paper proposes a solution based on set membership filter (SMF).Firstly,the noise is defined as an unknown but bounded (UBB)noise,and then the UBB noise set and the state set are con-tained by the ellipsoid,Doppler frequency estimation of carrier signal is accomplished by using the method of set membership filter next.Finally,the effectiveness of the proposed algorithm is verified by Matlab simulation and compared with the traditional method.Compared with the method based on transfer function of tracking loop,the proposed algorithm improves the dynamic adaptability and tracking precision;both robustness and speediness of the loop are improved com-pared with the performance of Kalman filter method.Accordingly,set membership filter is a new design method in the field of GPS receiver carrier tracking loop.
