| Title | Impact of Satellite Aeronautical Channel on Modem Specifications: Phase II: Oceanic Multipath Measurements and Modem Concepts |
|---|---|
| Record ID | 40148 |
| Personal Name Creator |
Bello, Phillip A.; Weng, L. J.; Chase, David; DeRosa, Joseph K. |
| Source | 195p. 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 | 19750101 |
| Language | English |
| Abstract | This report completes the analysis initiated in the Phase I report of the effects of oceanic multipath on ranging and data modems for satellite air traffic control systems. The interaction between multipath antenna and apparent measured multipath is determined using a "vector Kirchoff" model and ocean scattering. Procedures for antenna design, seas state sensing, and multipath measurements are detailed, and tone raning performance is computed for various antenna designs. Consideration is given to the problem of tone probing on a 50 KHz hard limiting AEROSAT channel while data transmission is taking place. The problem of how much measurement of error probability in data transmission over the AEROSAT channel is addressed. It is also shown that with the proper integration of coding and modulation techniques, it is possible to construct a robust signaling scheme which is insensitive to the multipath and which can improve performance when operating in the region of low direct path signal-to-noise ratios. |
| Public Note | Introduction, Interaction between antenna chracteristics, Simultaneous data transmission and tone probing through a hard limiter, Percentage measurement error for measurement of error rate in ricean channels, Coding and modulation concepts for aeronautical channels, Appendices |
| Rosap ID | dot:9264 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/9264 |
| TRT Terms | Satellite communication; Multipath transmission; Modulation; Modems |
| General Subjects | Aircraft satellite channel characterization; Oceanic multipath; Multipath antenna; Sea state measurements; Tone probing; Error probability measures; Coding and modulation techniques |
| Classification | NTL - AVIATION - Air Traffic Control |
| Geographical Coverage |
United States |
| OCLC | 48246080 |
| TRIS Online Accession No |
90300 |
| Contract Number | DOT-TSC-516-2 |
| Report Number | DOT-TSC-FAA-74-27; FAA-RD-74-215 |
| Availability | Volpe National Transportation Systems Center, Technical Reference Center |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/40000/40100/40148/DOT-TSC-FAA-74-27.pdf |
| Format | |
| Database | NTL Digital Repository |