摘要
分析了国际海事卫星通信系统(Inmarsat)反向信道的突发类型,将反向信道突发分为短突发和长突发。分别研究了短突发和长突发的位同步方法。针对短突发,提出了基于Gardner算法的非数据辅助定时方法;针对长突发,提出了基于数字锁相环和数字压控振荡器的定时跟踪算法。仿真验证了所提算法的可行性。
The burst structures of uplink transmission of International Maritime Satellite Communication System（Inmarsat） are ana- lyzed. The reverse channel bursts are classified as two types ： short burst type and long burst type. The symbol timing algorithms for these two burst structures are proposed. Aiming at the short burst,a non-data-aided（NDA） Gardner algorithm is proposed. Aiming at the long burst,a timing tracking algorithm based on digital phase-locked loop （PLL）and numeric controlled oscillator （NCO）is proposed. The simulation results prove the feasibility of the proposed algorithms.
出处
《无线电通信技术》
2013年第5期21-22,36,共3页
Radio Communications Technology
