DC Field | Value | Language |
---|---|---|
dc.contributor.author | Jung, Bang-Chul | ko |
dc.contributor.author | Kwon, Jae-Kyun | ko |
dc.contributor.author | Jin, Hu | ko |
dc.contributor.author | Sung, Dan-Keun | ko |
dc.date.accessioned | 2013-08-29T02:21:17Z | - |
dc.date.available | 2013-08-29T02:21:17Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2008-03 | - |
dc.identifier.citation | JOURNAL OF COMMUNICATIONS AND NETWORKS, v.10, no.1, pp.71 - 78 | - |
dc.identifier.issn | 1229-2370 | - |
dc.identifier.uri | http://hdl.handle.net/10203/176606 | - |
dc.description.abstract | We propose a sub-band spreading technique for adaptive modulation (AM) in orthogonal frequency division multiplexing (OFDM) systems in order to reduce signaling overheads and to average frequency selective fading channels causing different signal-to-noise ratio (SNR) values for subcarriers in each subband. The conventional sub-band based AM schemes can also reduce signaling overheads and complexity for allocating a resource per sub-band at a time. However, they may suffer from the channel variation in a sub-band when the sub-band size is larger than the channel coherence bandwidth (BW). The sub-band spreading at the transmitter enables the received symbols in each sub-band to have an identical reliability even in a frequency selective fading channel. We rigorously analyze the averaged SNR value at the receiver of the sub-band spreading system and the analyzed average SNR in a sub-band is used for an adaptation criterion. The proposed AM scheme outperforms the conventional sub-band based OFDM scheme without spreading, and it can yield better throughput performance than the conventional subcarrier based AM schemes when we consider the signaling overheads. | - |
dc.language | English | - |
dc.publisher | Korean Inst Communications Sciences (K I C S) | - |
dc.subject | WIRELESS ACCESS | - |
dc.subject | VSF-OFCDM | - |
dc.subject | FREQUENCY | - |
dc.subject | PERFORMANCE | - |
dc.subject | CHANNELS | - |
dc.title | Sub-band spreading technique for adaptive modulation in OFDM systems | - |
dc.type | Article | - |
dc.identifier.wosid | 000254805800010 | - |
dc.identifier.scopusid | 2-s2.0-42149094940 | - |
dc.type.rims | ART | - |
dc.citation.volume | 10 | - |
dc.citation.issue | 1 | - |
dc.citation.beginningpage | 71 | - |
dc.citation.endingpage | 78 | - |
dc.citation.publicationname | JOURNAL OF COMMUNICATIONS AND NETWORKS | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Sung, Dan-Keun | - |
dc.contributor.nonIdAuthor | Kwon, Jae-Kyun | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | adaptive modulation (AM) | - |
dc.subject.keywordAuthor | orthogonal frequency division multiplexing (OFDM) | - |
dc.subject.keywordAuthor | sub-band spreading | - |
dc.subject.keywordPlus | WIRELESS ACCESS | - |
dc.subject.keywordPlus | VSF-OFCDM | - |
dc.subject.keywordPlus | FREQUENCY | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | CHANNELS | - |
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