| Autor: |
H. H. Hoffman, R. H. Brandt, H. W. Arnold, M. F. Wazowicz, D. C. Cox, R. P. Leck |
| Rok vydání: |
1978 |
| Předmět: |
|
| Zdroj: |
Bell System Technical Journal. 57:1289-1329 |
| ISSN: |
0005-8580 |
| DOI: |
10.1002/j.1538-7305.1978.tb02100.x |
| Popis: |
This paper describes the receiving electronics built at the Bell Laboratories Crawford Hill facility at Holmdel, New Jersey to use the 19-and 28-GHz beacons on the COMSTAR satellites for propagation measurements. The receiving system accurately determines attenuation, differential phase, depolarization, bandwidth limitations and angular scatter of these signals produced by rain. This highly reliable system operates continuously and unattended; it automatically reacquires the beacon signals after dropout due to severe attenuation or momentary power outage. Correlations among strong and weak signal components are used to permit detection of weak cross-polarized signals during severe fading. Receiver noise bandwidths as low as 1.6 Hz are used. A high degree of phase stability is achieved in all circuits and components. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Plný text