| タイトル | Discriminator aided phase lock acquisition for suppressed carrier signals |
| 本文（外部サイト） | http://hdl.handle.net/2060/19820021663 |
| 著者（英） | Krasin, F. E.; Carson, L. M. |
| 著者所属（英） | Motorola, Inc.|NASA Pasadena Office |
| 発行日 | 1982-06-22 |
| 言語 | eng |
| 内容記述 | A discriminator aided technique for acquisition of phase lock to a suppressed carrier signal utilizes a Costas loop which is initially operated open loop and control voltage for its VCXO is derived from a phase detector that compares the VCXO to a reference frequency thus establishing coarse frequency resolution with the received signal. Then the Costas loop is closed with the low-pass filter of the channel having a bandwidth much greater (by a factor of about 10) than in the I channel so that a frequency discriminator effect results to aid carrier resolution. Finally, after carrier acquisition, the Q-channel filter of the Costas loop is switched to a bandwidth substantially equal to that of the I-channel for carrier tracking. |
| NASA分類 | ELECTRONICS AND ELECTRICAL ENGINEERING |
| レポートNO | 82N29539 |
| 権利 | No Copyright |
