The Beidou satellite navigation system provides basic navigation, precise single-point positioning, satellite-based augmentation, short message communication and medium-orbit search and rescue services.
| Service | Signal Frequency Point | Satellite | |
| Basic navigation service | B1I、B1C、B2a、B2b、B3I | 3IGSO+24MEO | |
| B1I、B3I | 3GEO | ||
| Satellite-based enhanced service | BDSBAS-B1C | 3GEO | |
| BDSBAS-B2a | |||
| Short message communication service | Region | L (uplink), S (downlink) | 3GEO |
| Worldwide | L (uplink) | 14MEO | |
| B2b (downlink) | 3IGSO+24MEO | ||
| International Search and Rescue Service | UHF (uplink) | 6MEO | |
| B2b (downlink) | 3IGSO+24MEO | ||
| Precision positioning service | B2b | 3GEO | |
| Foundation enhancement service | Real-time mobile communication broadcast, Internet download afterwards | Real-time mobile communication broadcast, Internet download afterwards | |
Fig.1 BDS frequency bandwidth
Saluki Technology provides GNSS/GPS Signal Simulator which can simulate BDS, GPS, GLONASS, Gallileo signals, and suitable for car/mobile phone/ digital products (with navigation) testing.
Fig.2 NS1102X Navigation Signal Simulator
