一種基于等效容量的鏈路性能預測方法
Link Error Prediction Based on Capacity Equivalence
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摘要: 該文提出一種在信道復雜變化時對鏈路性能進行準確預測的方法。在介紹了一種基于Shannon信道容量的量度的基礎上，引入了一個新的能夠反應信道衰落速度的懲罰因子Q。對于不同的調(diào)制方式和編碼速率，給出了Q 與信道變化程度的關系式，以及需要參考的AWGN信道下的性能曲線。仿真結(jié)果表明該方法能夠?qū)崟r地反映出信道的變化程度，從而使得預測更加準確。該文雖以Turbo碼性能的預測為例，但是很容易就可以推廣到其他鏈路級的情況。Abstract: 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 Shannons 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.
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