CCSK和DSSS编码仿真与抗干扰性能比较分析

The Comparative Analysis on the Coding Simulation and the Anti-jamming Performance of CCSK and DSSS

作为提高通信系统抗干扰能力的重要方式，扩频技术意义重大。和经典的直接序列扩频DSSS相比，CCSK软扩频方式出现较晚，但也在某些场合得到了应用，譬如在JTIDs系统中。文章基于JTIDS系统，对DSSS和CCSK编码进行了仿真，并比较分析了二者的抗干扰性能，在假设已经取得载波和位的同步的前提下，得出了在小错误率情况下CCSK编码性能优于DSSS编码，但在大错误率情况下CCSK编码性能劣于DSSS编码的结论。

As an important method to improve the anti-jamming performance of the communication system, the spread spectrum technique is of great significance. Compared with the classical direct sequence spread spectrum（DSSS） method, CCSK software spread spectrum method appeared a bit later, but it is still appli＇ed in some occasions, especially in JTIDS system. Based on the JTIDS system, DSSS and CCSK are simulated in this paper, and their anti-jamming performances are also comparatively analyzed in detail. At last, on the premise of cartier-wave synchronization and bit synchronization, the conclusion, that CCSK is superior to DSSS only in the small error probability, but interior to DSSS in the big error probability, is given.