一種基于等效容量的鏈路性能預(yù)測(cè)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(fù)雜變化時(shí)對(duì)鏈路性能進(jìn)行準(zhǔn)確預(yù)測(cè)的方法。在介紹了一種基于Shannon信道容量的量度的基礎(chǔ)上，引入了一個(gè)新的能夠反應(yīng)信道衰落速度的懲罰因子Q。對(duì)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(guān)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(shí)地反映出信道的變化程度，從而使得預(yù)測(cè)更加準(zhǔn)確。該文雖以Turbo碼性能的預(yù)測(cè)為例，但是很容易就可以推廣到其他鏈路級(jí)的情況。
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關(guān)鍵詞:
- 無線通信; 性能預(yù)測(cè); Turbo碼; 懲罰因子; 分段等效
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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