一种基于等效容量的链路性能预测方法  

Link Error Prediction Based on Capacity Equivalence

作　　者：刘真[1] 段然[1] 晋云根[1] 杨大成[1] 

机构地区：[1]北京邮电大学BUPT-Qualcomm无线研究中心,北京100876

出　　处：《电子与信息学报》2006年第10期1851-1853,共3页Journal of Electronics & Information Technology

基　　金：美国Qualcomm公司资助课题

摘　　要：该文提出一种在信道复杂变化时对链路性能进行准确预测的方法。在介绍了一种基于Shannon信道容量的量度的基础上,引入了一个新的能够反应信道衰落速度的惩罚因子Q。对于不同的调制方式和编码速率,给出了Q与信道变化程度的关系式,以及需要参考的AWGN信道下的性能曲线。仿真结果表明该方法能够实时地反映出信道的变化程度,从而使得预测更加准确。该文虽以Turbo码性能的预测为例,但是很容易就可以推广到其他链路级的情况。This paper presents a methodology to accurately predict link error performance based on capacity equivalence for a wide variety of channels. A metric based on Shannon＇s channel capacity is introduced and combined with a new penalty factor Q relating to channel fading rate. And a new segment equivalent method is also presented to make use of the information of each slot in the prediction. This method requires a Q look-up formula and a reference AWGN performance curve per channel code rate and modulation. Simulation results show that this method provides a good prediction performance for different fading rate channels. Here is an example of Turbo code performance prediction, it is convenient to apply to other link-level cases.

关 键 词：无线通信 性能预测 TURBO码 惩罚因子 分段等效 

分 类 号：TN92[电子电信—通信与信息系统]