摘要
目前无线通信中广泛使用的HARQ合并技术主要是Chase合并和递增冗余(IR)合并。针对Chase合并在低信噪比下性能受限,递增冗余(IR)合并实际应用复杂的问题,提出了一种基于信噪比的自适应合并算法,通过实时估计信道的信噪比,综合使用Chase合并和递增冗余(IR)合并,实现了系统性能和实现复杂度的统一。仿真结果表明,算法是切实可行的。
The combining technology of HARQ are Chase combining and Incremental Redundancy(IR) generally.However, the performance of Chase combining is not excellent at low signal-to-noise channels and IR combining is complex to be realized.This paper proposes an adaptive combining algorithm based on signal-to-noise.With the real time estimation of channel signal-to-noise, this algorithm uses Chase combining and IR combining synthetically, which unifies performance and complexity of the system.The simulation results indicate that the new adaptive combining scheme is feasible.
出处
《计算机工程与应用》
CSCD
北大核心
2011年第17期78-80,90,共4页
Computer Engineering and Applications
基金
国家高技术研究发展计划(863)No.2007AA01Z434~~