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Collision Dispersion Based on Orthogonal Pre-Spreading in Orthogonal Code Hopping Multiplexing  

Kwon, Jae-Kyun (영남대학교 전자정보공학부)
Jung, Bang-Chul (KAIST IT 융합연구소)
Yun, Kyung-Su (영남대학교 전자정보공학부)
Sung, Dan-Keun (KAIST 전기 및 전자공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.9A, 2009 , pp. 679-684 More about this Journal
Abstract
A collision dispersion scheme based on orthogonal pre-spreading is proposed to reduce the effect of collisions that occur in orthogonal code hopping multiplexing(OCHM). The OCHM scheme was previously proposed to accommodate a significantly larger number of low-activity bursty channels than the number of orthogonal codewords. The proposed scheme greatly reduces the required SNR in channel decoding. In addition, the proposed scheme can be applied to OFHM based on OFDM.
Keywords
OCHM; orthogonal code hopping multiplexing; pre-spreading; collision;
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