C.2 Multipath case
25.1733GPPRelease 17Requirements for support of Assisted Galileo and Additional Navigation Satellite Systems (AGANSS) Time Division Duplex (TDD)TS
Doppler frequency difference between direct and reflected signal paths is applied to the carrier and code frequencies. The Carrier and Code Doppler frequencies of LOS and multipath for GANSS signals are defined in table C.21.
Table C.21: Multipath case
Initial Relative Delay 
Carrier Doppler frequency of tap [Hz] 
Code Doppler frequency of tap [Hz] 
Relative mean Power [dB] 
0 
Fd 
Fd / N 
0 
X 
Fd0.1 
(Fd0.1) /N 
Y 
Note: Discrete Doppler frequency is used for each tap. 
Where the X and Y depends on the GNSS signal type and is shown in table C.22, and N is the ratio between the transmitted carrier frequency of the signals and the transmitted chip rate as shown in table C.23 (where k in table C.23 is the GLONASS frequency channel number).
Table C.22: Relative Delay and Attenuation of Non Line of Sight Signals
System 
Signals 
X [m] 
Y [dB] 
Galileo 
E1 
125 
4.5 
E5a 
15 
6 

E5b 
15 
6 

GPS/Modernized GPS 
L1 C/A 
150 
6 
L1C 
125 
4.5 

L2C 
150 
6 

L5 
15 
6 

GLONASS 
G1 
275 
12.5 
G2 
275 
12.5 

BDS 
B1I 
75 
4.5 
Table C.23: Ratio between the transmitted carrier frequency of the signals and the transmitted chip rate
System 
Signals 
N 
Galileo 
E1 
1540 
E5a 
115 

E5b 
118 

GPS/Modernized GPS 
L1 C/A 
1540 
L1C 
1540 

L2C 
1200 

L5 
115 

GLONASS 
G1 
3135.03 + k 1.10 
G2 
2438.36 + k 0.86 

BDS 
B1I 
763 
The initial carrier phase difference between taps shall be randomly selected between 0 and 2. The initial value shall have uniform random distribution.
Annex D (normative): Measurement sequence chart