Abstract: In the spread spectrum communication, the characteristics of spreading sequences are important to the anti-jamming,anti multi-path fading,the low probability of intercept and the acquisition of the system. The characteristics of the spreading codes have tremendous impact on the performance of the spread spectrum system. Specifically, the characteristics of the spreading codes also play an important part in the Self-Encoded Spread Spectrum (SESS) communication system. In this paper, the characteristics of the spreading codes generated by AR filter in SESS are analyzed in detail. The results of the computer simulation show that the characteristics of self-encoded spread spectrum sequences obtained with AR filter meet the requirements of SESS system.