Table 1 Signal modulation parameters of S-band systems
Types | System | Center frequency (MHz) | Modulation type | Chip rate (Mcps) | Subcarrier frequency (MHz) |
|---|---|---|---|---|---|
Space based | Globalstar | 2491.75 | SRC(0.2,1) | 1.2288 | – |
IRNSS | 2492.028 | SPS: BPSK(1) | 1.023 | – | |
RS: BOCs(5,2) | 2.046 | 5.115 | |||
Planned signal | Galileo candidate | 2492.028 | CBOC(6,1,1/11) | 1.023 | 6.138 |
BPSK(n) (n=1,4,8) | \(n \times 1.023\) | – | |||
KPS candidate | 2492.028 | BOCs(5,2) | 2.046 | 5.115 | |
BOCc(4,4) | 4.092 | 4.092 | |||
BOCs(3,1) | 1.023 | 3.069 | |||
BPSK(n) (n=1,4,5,8) | \(n \times 1.023\) | – | |||
Compass candidate | 2492.028 | BM2RC(8) | 8.184 | - | |
BOCc(4,4) | 4.092 | 4.092 | |||
BOCs(4,4) | 4.092 | 4.092 | |||
MSK-BOC(4,4) | 4.092 | 4.092 | |||
BPSK(8) | 8.184 | – |