Signal coding using orthogonal variable spreading factor code set

Abstract

A satellite communications system can use a spread-spectrum waveform and format, a synchronization scheme, and/or a power management algorithm. This approach can provide benefits such as allowing every terminal to communicate with every other terminal, link margin permitting. This gives the network a mesh topology although it can be configured in a star topology for highly asymmetric applications. A further understanding of the nature and the advantages of particular embodiments disclosed herein may be realized by reference of the remaining portions of the specification and the attached drawings.

We claim: 
     
         1 . A method for improving spectral characteristics in a transmitted signal, wherein the signal is generated at least in part by using an Orthogonal Variable Spreading Factor (OVSF) code set, the method comprising:
 scrambling the signal, at least in part, by using an outer code to improve spectral quality, so that a descramble period is substantially the same as that of the OVSF code set.