摘要
数据链抗干扰中,由于长距离传输带来的信号衰减非常显著,提升低信噪比下的传输能力是最为基础的需求。针对低信噪比下数据同步的问题,仿真了不同软相关方案的同步性能,简化了软相关同步算法复杂度;同时,为满足不同场景下的通信需求,利用信号 SNR 作为判决条件,动态调整跟踪与同步方案。在 SOC 芯片上实现了动态软相关跟踪与同步方案,在简化了算法复杂度的情况下,性能仅损失 0.5 dB。
In the data link anti -interference, the signal attenuation due to long distance transmission is very significant,it is the most basic demand to enhance the transmission capability under the low SNR . For low SNR data synchronization problem,soft synchronization performance of different algorithms are simulated. Meanwhile ,the soft synchronization algorithm complexity was simplified;at the same time,in order to meet the needs of different Communication requirements, using SNR signal as the decision criterion,dynamic adjusts tracking and synchronization scheme. Finally,the dynamic soft correlation tracking and synchronization scheme is implemented on the SOC chip,and the performance is reduced by only 0.5dB when the complexity of the algorithm is simplified.
作者
杨牧
陈长兴
凌云飞
王晓东
林兴
文志军
YANG Mu;CHEN Chang-xing;LING Yun-fei;WANG Xiao-dong;LIN Xing;WEN Zhi-jun(School of Science, Air Force Engineering University,Xi’an 710051,China)
出处
《火力与指挥控制》
CSCD
北大核心
2019年第5期78-81,共4页
Fire Control & Command Control
基金
陕西省自然科学基础研究计划基金资助项目(2014JM8344)
关键词
同步算法
软相关
低信噪比
数据链
bit synchronization
soft correlation
low signal to noise ratio
data link
