Turbo Interleaver has lacked systemic designing theory and explicit optimum criterion all the time.In this paper

the theory fundament will be discussed

and a multi-grade Math Model is to be founded from two aspects

code-weight analysis and correlativity analysis

in the meanwhile

optimum criterion of mono-interleaver—function S

6

is put forward.On the above basis

a novel weight

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reverse interleaver is designed for the third-generation mobile communication system

IMT2000

and computer simulation shows that its performance is excellent

both theory analysis and experiment simulation prove that it is much superior to mother

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interleaver that is widely exploited at present in 3GPP standard (3G TS 25.212 V3.3.0).