A Hybrid Spread Spectrum Communication Method Based on Chaotic Sequence

The openness of satellite communication channel makes satellite signal easy to be intercepted and decoded by non-partners, so it’s necessary to adopt secure communication technologies in satellite communication systems. Based on the existing hybrid spread-frequency technology, this paper introduces chaotic sequence to control system frequency hopping and code-hopping, puts forward a new type of safe communication method combined with the characteristics of chaotic sequence. This method improves the anti-interception performance of satellite communication system and has a good application prospect.

I. Introduction

After more than 50 years of development, satellite communication plays an important role because of its wide coverage and low investment in providing communication services in a large range and complex environment. The open channel used in satellite communication makes information easy to be leaked. Thus, secure satellite communications has always been an important research direction.