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Improved Orthogonal Code Hopping Multiplexing Using Both Division and Hopping  

Kwon, Jae-Kyun (School of EECS, Yeungnam University)
Park, Su-Won (Dept. of Electronics and Communications Engineering, Kwangwoon University)
Sung, Dan-Keun (School of EECS, KAIST)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.33, no.3A, 2008 , pp. 277-285 More about this Journal
Abstract
We previously proposed an Orthogonal Code Hopping Multiplexing (OCHM) scheme for statistical multiplexing on a synchronous downlink. OCHM enables a large number of users to share a limited number of code channels through statistical multiplexing. We here improve the performance of OCHM by prioritizing encoded symbols according to their importance using both the conventional code division and the previously proposed code hopping multiplexing schemes. Prioritization is useful for channel coding schemes with different levels of importance for encoded symbols such as turbo-codes. Scheme performance is evaluated by simulation in terms of the required Eb/N0 for a 1% block error rate.
Keywords
OCHM(Orthogonal code hopping multiplexing); Turbo-codes; Systematic Code; Priority; Statistical Multiplexing;
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