New synchronization method for the SSRA system
Abstract
A newly proposed synchronization method for the Spread Spectrum Random Access (SSRA) system and its performance are presented. For quick initial synchronization, an FSK signal is transmitted simultaneously with an SSRA signal; at the receiver this FSK signal generates a reference carrier, control signals for both AFC and AGC, and frame information on a PN sequence. The Jump AFC technique speeds up the resolution of the carrier frequency uncertainty and frame information fastens the synchronization of the PN code. After the initial synchronization, the FSK signal transmission is stopped and the Costas loop and the Delay Lock Loop play the role of synchronization.
- Publication:
-
NTC 1979; National Telecommunications Conference, Volume 1
- Pub Date:
- 1979
- Bibcode:
- 1979ntc.....1Q..15Y
- Keywords:
-
- Automatic Frequency Control;
- Automatic Gain Control;
- Frequency Shift Keying;
- Frequency Synchronization;
- Spread Spectrum Transmission;
- Transmission Efficiency;
- Carrier Frequencies;
- Delay Circuits;
- Feedback Control;
- Pseudonoise;
- Signal Encoding;
- Time Lag;
- Communications and Radar