A method for fast synchronization in spread spectrum multiple access communication systems
Abstract
It is noted that multiple users can simultaneously utilize a common frequency spectrum in a spread-spectrum multiple-access communication system, which is expected to be applied to satellite and vehicle communication. However, several seconds are required to establish synchronization for the pseudo-noise code used on the receiving side. It is proposed to solve this problem by obtaining the information for synchronization by the use of a surface acoustic wave matched filter, even though this is difficult in multiple-access communication due to the restriction on the number of taps. A new code for the communication of analog information is developed which is applicable to the spread-spectrum multiple-access communication system. It is determined that the surface acoustic wave matched filter, which has fewer taps and is more practical, can be employed in order to significantly reduce the time required for the establishment of synchronization.
- Publication:
-
Electronics Communications of Japan
- Pub Date:
- July 1982
- Bibcode:
- 1982JElCo..65R..65S
- Keywords:
-
- Multiple Access;
- Spread Spectrum Transmission;
- Synchronism;
- Telecommunication;
- Analog Data;
- Binary Codes;
- Delay Lines;
- Filters;
- Surface Acoustic Wave Devices;
- Communications and Radar