摘要
针对AOS协议中卫星自适应帧的帧同步码识别问题,在对传统的自相关算法进行研究的基础上,提出了一种改进的自相关算法进行分析和识别。该方法克服了传统自相关算法极易受到非同步码影响的缺点。首先对数据进行运算识别出帧长和同步码长,然后通过得到的帧长和同步码长计算出同步码起始位。仿真实验表明:该方法能够利用较少的数据快速准确地识别出帧同步码,并具有良好的容错性能。
To recognize synchronization codes of satellite adaptive frame in AOS protocol, an improved autocorrelation algorithm is proposed based on the traditional autocorrelation algorithm. The algorithm overcomes the shortcoming that traditional autocorrelation algorithm is influenced by the non - syn-chronization codes. Firstly, the frame length and code length is get according to data calculating. Secondly, the start bit of synchronization code is achieved with the frame length and code length. Under the case of high BER, the results show the method can find the frame synchronization codes by fewer codes with less time.
出处
《电子信息对抗技术》
2012年第3期10-14,共5页
Electronic Information Warfare Technology
关键词
AOS
自适应帧
帧同步码识别
AOS
adaptive frame
frame synchronization code recognition
