Low C/N spread spectrum modem for random access satellite communications

2003 ◽  
Author(s):  
K. Kobayashi ◽  
H. Kazama
Keyword(s):  
Spread Spectrum ◽  
Random Access ◽  
Satellite Communications

Random access in satellite communications: a background on legacy and advanced schemes

2018 ◽  
pp. 425-457
Author(s):  
Karine Zidane ◽  
Jérôme Lacan ◽  
Mathieu Gineste ◽  
Marie-Laure Boucheret ◽  
Jean-Baptiste Dupé
Keyword(s):  
Random Access ◽  
Satellite Communications

Propagation Delay Difference Estimation for Initial Random Access in LTE Compatible Mobile Satellite Communications System

2013 ◽  
Vol 846-847 ◽  
pp. 647-650
Author(s):  
Cheng Mei Li ◽  
Jian Jun Wu ◽  
Xiao Ning Zhang ◽  
Xi Luan ◽  
Hai Ge Xing
Keyword(s):  
Estimation Method ◽  
Random Access ◽  
Satellite Communications ◽  
Propagation Delay ◽  
Satellite System ◽  
Satellite Systems ◽  
Access Channel ◽  
Geo Satellite ◽  
Mobile Satellite ◽  
Delay Difference

In this paper, a two-step propagation delay difference estimation method is proposed for LTE compatible multi-beam satellite systems to ensure the initial random access (RA). For GEO satellite system, there exists a large propagation delay difference, we cannot directly apply the LTE delay estimation method. To deal with this issue, we first divide a satellite beam into some layered small sub-areas according to the different delay difference values. Then, two types of Physical Random Access Channel (PRACH) preamble burst format are given. The detailed PRACH parameters are provided. Finally, simulations are performed and the results verify the availability of our proposed design.

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