摘要
为实现交替二进制偏移载波(AltBOC)信号数据和导频分量的相干累加处理,提出了一种改进的边带捕获处理算法。综合利用数据和导频通道信号,提高捕获灵敏度。通过分量合成与比较,后验估计数据和导频信号的相对符号关系。实现数据和导频通道相关器输出结果的相干累加,降低平方损耗。利用蒙特卡罗仿真分析了该算法的工作性能,并与传统的非相干累加算法进行了比较。结果表明,在恒虚警概率条件下,该算法可有效提高AltBOC信号的捕获概率,减少平均捕获时间。
To coherently combine the data and pilot components of alternate binary offset carrier （AhBOC） signals ,an improved side-band acquisition algorithm is presented. The joint data/pilot structure is fully exploited in order to improve the acquisition sensitivity of receivers. Component synthesizers and comparators are used to evaluate the relative sign between data and pilot channels by posterior estimation. By applying the coherent combining strategy to the correlator outputs of data and pilot channels, the squaring loss is reduced. The acquisition performance of the new algorithm is assessed through Monte Carlo simulations and compared with the traditional non-coherent combining strategy. Simulation results show that the proposed algorithm can effectively increase the probability of detection of AhBOC signals and reduce the mean acquisition time for a fixed probability of false alarm.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2012年第3期448-452,458,共6页
Journal of Nanjing University of Science and Technology
基金
国家'973'计划资助项目(2010CB731800)
关键词
交替二进制偏移载波
边带捕获
后验估计
相干累加
alternate binary offset carrier
side-band acquisition
posterior estimation
coherent combining
