Network Synchronization of an Orthogonal CDMA Satellite Communication System |
| |
Authors: | Diakoumis Gerakoulis Hsuan-Jung Su Evaggelos Geraniotis |
| |
Affiliation: | (1) General Dynamics, Advanced Information Systems, Bloomington, MN 55431, USA;(2) Dept. of Electrical Engineering, National Taiwan University, Taipei, Taiwan;(3) Dept. of Elect. and Comp. Eng., University of Maryland, College Park, MD 20742, USA |
| |
Abstract: | This paper provides the network synchronization of an orthogonal CDMA geostationary satellite system for fixed service communications.
It includes the synchronization procedures, the system architecture and the performance evaluation. The main objective is
to provide network wide synchronization of all uplink orthogonal CDMA transmissions. This is achieved in steps; first by providing
coarse synchronization using the uplink random access channel and then fine sync using innovative tracking control mechanisms.
The uplink access channel receiver utilize a parallel/serial search method for rapid code acquisition, while the code tracking
of the uplink orthogonal CDMA traffic channel is based on a delay feedback early-late gate in which the sych control resides
in the receiver. The proposed system is designed to minimize the onboard complexity and satisfy the performance requirements.
As shown in the performance section, the requirement that all uplink transmissions are synchronized to a reference time within
10% of the chip length can be achieved. In addition, the system analysis determines the design parameters values which optimize
performance. |
| |
Keywords: | Network synchronization Orthogonal CDMA Satellite communications |
本文献已被 SpringerLink 等数据库收录! |
|