Telecommunication Service Characteristics
| 47GHz BROADBAND TECHNICAL DETAILS | |
| PLATFORM | |
| Platforms: | 250 platforms worldwide, each operating independently and initially connected via ground-stations and existing public networks. Future platforms will be equipped with platform-to-platform links. |
| Altitude: | 21Km (70,000 feet) |
| Coverage Area: | 150Km diameter; 19,000 square kilometers plus specified locations outside this zone |
| Spot beams: | 700 spot beams per platform |
| Angle of Elevation: | >15° |
| Life-span: | 5-10 years |
| SPECTRUM | |
| Uplink: | 100MHz in 47.9 – 48.2 GHz |
| Downlink: | 100MHz in 47.2 – 47.5 GHz |
| SIGNALING PROTOCOL | |
| Modulation: | QPSK (subscriber); 64QAM (groundstation) |
| Communication protocol: | FDMA/TDMA uplink, TDM downlink |
| SUBSCRIBER INFORMATION | |
| Data rate: | 2Mbps uplink/10Mbps downlink |
| Power requirements: | 100mW - 250mW |
| TYPICAL 2GHZ SKY STATION SYSTEM | |
| INFRASTRUCTURE | |
| Platforms: | One platform with several groundstations per metropolitan area |
| Altitude: | 21-23Km (70,000 feet) |
| Coverage Area: | 1000Km diameter footprint |
| Spot beams: | >1000 spot beams per platform |
| Life-span: | 5 to 10 years |
| Capacity: | 2.06 Gigabit capacity
dynamically spread across footprint Equivalent of 425,000 simultaneous 8.0 Kbps telephone calls with 50% voice activity |
| SPECTRUM | |
| Subscribers: | 5 MHz (up) and 5 MHz (down) within frequencies identified by the WRC for use with Third Generation Mobile Terrestrial Systems. (1885-1980 MHz, 2010-2025 Mhz, and 2110 MHz in Regions 1 and 3, and 1885-1980 MHz and 2110-2160 MHz in Region 2). |
| SIGNALING PROTOCOL | |
| Modulation: | QPSK |
| Multiple access: | Wideband CDMA |
| Communication protocol: | Multiple protocols at transport and network levels supported |
| SUBSCRIBER INFORMATION | |
| Data rate: | 8.0Kbps – 16Kbps for voice; 384Kbps for data |
| Power requirements: | 25mW |