摘要
为解决时分数据调制(TDDM)方式而引发的信息码位符号翻转模糊问题,提出了一种基于影响因子的模糊抑制同步算法。首先通过搜索引导处理快速地解决伪码搜索范围大的问题;进一步,通过建立影响因子及分段处理,解决信息码符号翻转位置模糊问题。通过理论推导及仿真分析表明,新算法的翻转位置估计精度可以达到>98.8%;新算法与传统的PN算法比较,不但提高了估计精度,而且能够适应更低信噪比环境,同时降低了处理复杂度。
An impact factor-based ambiguity suppression synchronization algorithm is proposed to solve the code bit sign reversal ambiguity problem caused by TDDM modulation. Firstly, the problem of pseudo code search is quickly resolved by guide processing. Furthermore, code bit sign reversal ambiguity problem is resolved by using impact factor and segmentation processing. At last, theoretical derivation and simulation analysis are given. The resuh shows that the new algorithm＇ s estimation accuracy of sign reversal is more than 98.8%. Not only the new algorithm＇ s estimation accuracy is higher than that of traditional PN algorithms, but also it can adapt to lower SNR environment. At the same time, its processing complexity is lower than that of traditional PN algorithms.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2014年第4期459-466,共8页
Journal of Astronautics
基金
辽宁省高校创新团队计划(LT2011005)
新世纪优秀人才支持计划(NCET-11-1013)
沈阳理工大学"辽宁省信息网络与信息对抗技术重点实验室"开放基金资助课题
辽宁省科技厅项目(20121038)
辽宁省教育厅项目(L2013085)
