民用方面:

GLONASSL1=1602+0.5625*k(MHz)L2=1246+0.4375*k(MHz)  L1/L2=9/7

GPS:L1 :1575.42 +/-10 MHz L2:1227.60 +/-10 MHz

单频接收机只能接收L1载波信号,测定载波相位观测值进行定位。由于不能有效消除 电离层延迟影响,单频接收机只适用于短基线(<15km)的精密定位。 
双频接收机可以同时接收L1L2载波信号。利用双频对电离层延迟的不一样,可以消除电离层对电磁波信号的延迟的影响,因此双频接收机可用于长达几千公里的精密定位。

北斗:B11561.098   B21207.14

1561.098 MHz (B1), 1589.742 MHz (B1-2),1207.14 MHz (B2), 1268.52 MHz (B3)每个载波信号均有正交调制的普通测距码(I支路)和精密测距码(Q支路)。卫星以不同地址码区分(CDMA)。

伽利略:1589.74 MHz(E1:1587-1591)、1561.1 MHz(E2:1559-1563)、1278.75 MHz(E6)、1176.45MHz(E5a)1207.14(E5b)

从上看来,伽利略的频率几乎和北斗完全重合!!不过考虑到一定的带宽以及CDMA的调制模式,信号是可以共存的。

北斗导航建设规划:
Till the year Constellation                         Signals (actual emission)
2012         5GEO+5IGSO+4MEO
Regional Service) mainly COMPASS Phase(CP) II signals
2020         5GEO+3IGSO+27MEO
Global Service) mainly CP III signals

 
CP II: B1, B2, and B3 as below

Component  Carrier Frequency(MHz)  Chip Rate(cps)  Bandwidth(MHz)  Modulation Type Service Type
B1(I)         1561.098         2.046         4.092         QPSK     Open 
B1(Q)         1561.098                2.046         4.092           QPSK        Authorized
B2(I)         1207.14                 2.046         24         QPSK     Open 
B2(Q)         1207.14                 10.23         24              QPSK        Authorized
B3         1268.52                 10.23         24         QPSK     Authorized

CP III: B1, B2 and B3 as below

Component Carrier Frequency(MHz)  Chip Rate(cps)  Data/Symbol Rate (bps/sps) Modulation Type Service Type
B1-Cd         1575.42                 1.023         50/100                    MBOC(6,1,1/11) Open 
B1-Cp         1575.42                 1.023           No                         MBOC(6,1,1/11) Open
B1-A         1575.42                 2.046         50/100                    BOC142)   Authorized                                                      
B2aD         1191.795         10.23         25/50                    AltBOC(15,10 ) Open 
B2aP         1191.795                10.23           No                         AltBOC(15,10 ) Open
B2bD         1191.795                10.23           50/100                     AltBOC(15,10 ) Open
B2bP         1191.795                10.23           No                         AltBOC(15,10 ) Open
B3         1268.52                 10.23         500bps                    QPSK(10)    Authorized
B3-AD         1268.52                 2.5575         50/100                    BOC(15,2.5)    Authorized
B3-AP           1268.52                 2.5575          No                         BOC(15,2.5)    Authorized

北斗导航系统性能指标(使用)
Open Servicefree and open to users

Positioning  Accuracy: 10 m

Timing Accuracy: 20 ns       

Velocity Accuracy: 0.2 m/s