Turbo译码器的低功耗设计.pdf.pdf

第 30 卷第 2 期 Vol. 30 No . 2
电子器件
2007 年 4 月 Ch inese Jou r nal Of Elect ro n Devices Ap r. 2007
On a Tur bo Decoder Design for Low Po wer Dissipat ion
L U Ya n2min1 , H U Qi n g2s hen g2
1 . Coll ege of I nt egr at ed Ci rcuit I nst i tut e N anj i ng 210096 , Chi na;
2 . Ins ti t ute of RF2 & OE2ICs ( I ROI) Sout heast Uni v. Nanj i ng 210096 , Chi na
Abstract :For a lower power Turbo decoder , author described a kind of method a bo ut optimize the number
of iterations and shutting down the idle decoder s to reduce the dissipation. Because t he power of me mory
whic h used to store the branch metric and forwar d metrics in the SISO occupy a bout 70 % the decoder’s
power dissipation. So ,aut hor p roposed a scheme which is to reduce the power by increasing the logic cir2
cuit to decrease the number of memorizers. The result of experiment proved that t he modifie r method co uld
decrease about 12 % to the traditio nal method’s powe r dissipation. So , we can see that realize t he point
whic h is the main power dissipation is the key of the lower power de sign.
Key wor ds :communication coding ;low power consumption ;reduce t he memory ;turbo code
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Tur bo 译码器的低功耗设计 1
卢彦民1 ,胡庆生2
1. 东南大学集成电路学院,南京 210096 ;
2. 东南大学信息学院,南京 210096
摘要:为了降低 Tur bo 码译码器的功耗,作者介绍了一种利用对迭代次数的优化和关闭闲置状态下的译码器来降低功耗
的方案;由于在 SISO 中,存放分支路径值以及前向路径状态值的储存体在功率的消耗上约占整个 Turbo 译码器功耗的 70