CONTENTS

 

Annex 1  A satellite system with wideband spreading signals  (direct sequence (DS) technology)
 
1     Introduction
 
2     Application 1 A satellite system with wideband spreading signals overlaid on the conventional FSS FDMA signals
        2.1     System models
        2.2     Link budget analysis and performance estimation
                  2.2.1     Step 1
                  2.2.2     Step 2
                  2.2.3     Step 3
        2.3     Results of link budget analysis
        2.4     Summary of available data rate
                  2.4.1     Data rate with a variety of C/I values
                  2.4.2     Data rate with a variety of C/T degradations due to interference from adjacent satellites
        2.5     Impact of the overlay of wideband spreading signals on FDMA carriers
        2.6     Discussion
 
3     Application 2 A satellite system with dedicated bandwidths for both FDMA signals and wideband spreading signals
        3.1     System model
        3.2     Link budget analysis and performance estimation
        3.3     Results of link budget analysis
        3.4     Summary of available data rate
                  3.4.1     Data rate with a variety of bandwidths for spreading signals
                  3.4.2     Data rate for C/T degradation levels due to interference from adjacent satellites
        3.5     Discussion
 
4     Summary
Annex 2  An FSS system with a number of narrow spot beams using the CDMA (wideband spreading signals)
 
1     Overview
 
2     Channel capacity in the FDMA case
 
3     Channel capacity in the CDMA case
 
4     Channel capacity evaluation using parameters of the system example
 5     Summary
Annex 3  A satellite system using wideband spreading signals in uplinks to reduce the off-axis emission
 
1     Overview
 
2     Example of the system parameters
 
3     Results
 
4     Summary