摘要
针对流星余迹通信系统原理及信道特点,研究了基于自适应编码机制的流星余迹通信系统.根据流星余迹信道能量随时间呈指数变化的规律,在系统误比特率的约束条件下,通过实时估计出的流星信号接收信噪比,动态地改变系统TPC-RS编码的码率冗余,实现信息速率的自适应变化,有效提高了流星余迹信道的利用率.仿真结果和分析表明,在相同信道条件下,采用自适应编码较固定编码传输效率在误比特率为2×10-4时可获得3.68dB系统增益,数据通过量提高了一倍,验证了该方案的有效性和可行性.
According to the principle of meteor burst communication（MBC） and the characteristic of meteor channel,a mechanism for MBC based on adaptive coding transmission is proposed.On account of the system restriction of BER,the adaptive variable data rate transmission can be achieved by estimating the real-time signal-tonoise ratio and changing the coding rate of TPC-RS codes.Simulation results and analysis show that,the proposed adaptive coding transmission system can obtain 3.68dB system gain when compared with that of the fixed coding transmission system with the BER of 2×10^-4under the same channel conditions.And the experiment shows that the meteor channel can be fully utilized effectively.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2010年第7期1517-1524,共8页
Acta Electronica Sinica
基金
国家自然科学基金(No.60672129)
(No.60706027)
国家863高技术研究发展计划(No.2009AA01Z237)
(No.2007AA01Z182)
新世纪优秀人才支持计划(No.NCET-07-0653)
高等学校学科创新引智计划(No.B08038)
长江学者和创新团队发展计划(No.IRT0852)
