A LPI anti-jam design for satellite communications
- Paper number
IAC-06-B3.2.08
- Author
Mrs. Li ying, Academy of Equipment Command and Technology, China
- Coauthor
Mr. Hongli Zhao, China
- Year
2006
- Abstract
Satellite communication system (SCS) requires many types of information to be handled in safety and reliability. But satellite communication link is exposed to the space and susceptible to be intercepted and interfered. So traditional SCS adopts binary direct sequence spread spectrum (DSSS) to satisfy the low probability of intercept (LPI) effectiveness. But it has a disadvantage: LPI performance requires high processing gain, but the high data rate limits satellite processing gain. How to design a high data rate system which has LPI effectiveness in the presence of jammers and intercept receivers is an important problem. M-ary spread spectrum (SS) is presented to design the satellite wireless terminal which can overcome this limitation largely. The performance of M-ary SS has been assessed with simulation. Results show that when Signal Jam Ratio (SJR) is more than -5dB with 24dB spread spectrum gain, the performance of M-ary SS is better than that of the traditional DSSS. The paper is organized as follows. In the first part of this paper, we describe this system in detail. Introduce the theory of M-ary spread spectrum. Secondly, the LPI anti-jam performance of the M-ary spread spectrum application in satellite system is discussed in the presence of wideband jamming, part band jamming, pulse jamming and single tone jamming. Thirdly, the use of Reed-Solomon code in SCS is to improve performance. Results show that error performance can be further enhanced by the use of Reed-Solomon coding. Finally, concludes the paper.
- Abstract document