| Title | Performance of a Q-M/PSK Data Modem Operating in a Voice and Data Mode Through the ATS-6 Satellite |
|---|---|
| Record ID | 41701 |
| Personal Name Creator |
Golab, J.; Duncombe, C. B. |
| Source | 29p. in various pagings |
| Corporate Creator | John A. Volpe National Transportation Systems Center (U.S.) |
| Publisher | United States. Department of Transportation. Federal Aviation Administration |
| Publication Date | 19790201 |
| Language | English |
| Abstract | Experiments were conducted in cooperation with the Communications Research Center (CRC) of Canada to gather additional performance data on the error statistics of the digital data channel of the Q-M/PSK Voice and Data Modem, while operating in the hybrid (simultaneous) voice and data mode. These data are to supplement the data collected in the 1974-75 ATS-6 satellite tests to provide additional information about the performance of the data portion of the modem when operating in a gaussian noise (no multipath) environment. Flight tests were conducted from 14 to 24 March 1977, in three locations: two in Canada at a 9 deg. elevation angle to the satellite and one near Bermuda at a 5 deg. elevation angle. Signals were transmitted from the Communications Research Center ground station at L-Band (1650 MHz) to the ATS-6 where they were relayed to the aircraft at 1550 MHz and received and recorded for post-flight tests. All flight tests were successfully completed and a large amount of data were collected. Results indicate a bit error rate on the order of 2 dB closer to theoretical for DECPSK than in the previous ATS-6 tests, and in close agreement with laboratory and acceptance test data. |
| Public Note | Introduction, Background, System description, Test description, Test results, Summary and conclusions, References |
| Rosap ID | dot:9324 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/9324 |
| TRT Terms | Phased arrays; Multipath transmission; Altitude; Modems; L band; Phase shift |
| General Subjects | Slot-dipole; Q-M/PSK; Phased array; Bit-error; Elevatiom angle; Multipath; ATS-6 satellite; Altitude; Communication satellites; Modems; L-band; Phase shift keyers; Data links |
| Classification | NTL - AVIATION - Air Traffic Control |
| Geographical Coverage |
United States |
| Contract Number | DOT-TSC-531 |
| Report Number | DOT-TSC-FAA-77-28; FAA-RD-78-6 |
| Availability | Volpe National Transportation Systems Center, Technical Reference Center |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/41000/41700/41701/DOT-TSC-FAA-77-28.pdf |
| Format | |
| Database | NTL Digital Repository |