DC Field | Value | Language |
---|---|---|
dc.contributor.author | Jung, Bang Chul | ko |
dc.contributor.author | Cho, Sung Soo | ko |
dc.contributor.author | Sung, Dan Keun | ko |
dc.date.accessioned | 2013-03-08T18:48:32Z | - |
dc.date.available | 2013-03-08T18:48:32Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2009-02 | - |
dc.identifier.citation | IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, v.58, no.2, pp.670 - 681 | - |
dc.identifier.issn | 0018-9545 | - |
dc.identifier.uri | http://hdl.handle.net/10203/93953 | - |
dc.description.abstract | In this paper, we compare the performance of two downlink capacity-improvement schemes based on orthogonal code-hopping multiplexing (OCHM) and multiple scrambling codes (MSCs). Both OCHM and MSC systems have been proposed to overcome a code-limitation problem in a code division multiple access (CDMA) downlink. We mathematically analyze the user capacity in a general form, considering various factors such as user activity, spreading factor, amount of transmission symbol energy that is allocated to common control channels, amount of outer-cell interference, orthogonality factor, and sectorization factor. Numerical examples show that the capacity gain of the OCHM-based system increases as the other-cell interference decreases and the channel activity decreases. Thus, the OCHM-based system is a more effective scheme than the MSC-based system, considering that a code-limited situation more frequently occurs in the case of low other-cell interference and low channel activity. However, the OCHM-based system is more sensitive to the orthogonality factor. | - |
dc.language | English | - |
dc.publisher | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | - |
dc.subject | RATIO LLR CONVERSION | - |
dc.subject | CONVOLUTIONAL-CODES | - |
dc.subject | COMMUNICATION-SYSTEMS | - |
dc.subject | TURBO CODES | - |
dc.subject | FREQUENCY | - |
dc.title | Performance Comparison of Downlink Capacity Improvement Schemes: Orthogonal Code-Hopping Multiplexing Versus Multiple Scrambling Codes | - |
dc.type | Article | - |
dc.identifier.wosid | 000263639300014 | - |
dc.identifier.scopusid | 2-s2.0-61449238131 | - |
dc.type.rims | ART | - |
dc.citation.volume | 58 | - |
dc.citation.issue | 2 | - |
dc.citation.beginningpage | 670 | - |
dc.citation.endingpage | 681 | - |
dc.citation.publicationname | IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | - |
dc.identifier.doi | 10.1109/TVT.2008.926070 | - |
dc.contributor.localauthor | Sung, Dan Keun | - |
dc.contributor.nonIdAuthor | Cho, Sung Soo | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Downlink power allocation | - |
dc.subject.keywordAuthor | multiple scrambling codes (MSCs) | - |
dc.subject.keywordAuthor | orthogonal code hopping multiplexing (OCHM) | - |
dc.subject.keywordAuthor | user capacity | - |
dc.subject.keywordPlus | RATIO LLR CONVERSION | - |
dc.subject.keywordPlus | CONVOLUTIONAL-CODES | - |
dc.subject.keywordPlus | COMMUNICATION-SYSTEMS | - |
dc.subject.keywordPlus | TURBO CODES | - |
dc.subject.keywordPlus | FREQUENCY | - |
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