摘要
该文针对低信噪比下TDDM-BOC(Time Division Data Modulation-Binary Offset Carrier)信号的组合码序列(将伪码序列和副载波序列看成一个整体序列)及信息序列盲估计问题,提出一种改进的基于奇异值分解的方法。该方法首先利用双信息符号周期、间隔一信息符号周期的时间窗对接受信号进行分段,并构成观测矩阵。然后对观测矩阵进行奇异值分解,通过左奇异向量实现组合码序列的盲估计。同时,通过右奇异向量实现信息序列的盲估计。仿真分析表明,该方法能够在较低的信噪比下达到精确估计的目的。这对于从事卫星导航接收机设计具有一定的参考价值。
For the problem of Time Division Data Modulation-Binary Offset Carrier （TDDM-BOC） modulation signal under low Signal-to-Noise Ratio （SNR）, including blind estimation of the combination code sequence and information sequence, a revised method using Singular Value Decomposition （SVD） is proposed. Firstly, the received signal is divided into double-symbol-period-length temporal vectors, with one-symbol-period overlapping, accumulates of these vectors one by one to form the signal matrix. Then, an operation of SVD may be applied to the observation matrix, and the estimation of the combination code sequence is obtained based on the left singular vector. At the same time the information sequence can be estimated through the right singular vector. The simulation results show that the proposed method has accurate estimation performance for the signal at the low SNR. It has a certain reference value for engaging in satellite navigation receiver design.
出处
《电子与信息学报》
EI
CSCD
北大核心
2016年第11期2760-2766,共7页
Journal of Electronics & Information Technology
基金
国家自然科学基金(61371164
61275099
61102131
61071196)
重庆市研究生科研创新项目(CYS14140)
重庆邮电大学研究生教育创新计划重点项目(Y201001)
关键词
时分数据调制-二进制偏移载波信号
组合码序列
信息序列
奇异值分解
Time Division Data Modulation-Binary Offset Carrier （TDDM-BOC） signal
Combination codesequence
Information sequence
Singular Value Decomposition （SVD）
