# US 2018/0323896 A1 · Signal coding using orthogonal variable spreading factor code set

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- Number: US 2018/0323896 A1
- Document ID: US20180323896A1
- Status: Published application
- Kind: A1
- Application number: 15/971,789
- Filed: 2018-05-04
- Published: 2018-11-08
- Earliest claimed: 2015-08-27
- Inventors: Nathan Hays; David Asson
- Web page: https://patentgrep.com/patent/US20180323896A1

## CPC

- H04J 13/0044: {OVSF [orthogonal variable spreading factor]}
- H04B 17/13: of power amplifiers, e.g. gain or non-linearity
- H04J 13/102: {Combining codes}
- H04L 49/1584: {Full Mesh, e.g. knockout}
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## 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.

## Claims

### 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.