Layered video transmission over wireless multirate DS-CDMA links
| dc.contributor.author | Kondi, L. P. | en |
| dc.contributor.author | Srinivasan, D. | en |
| dc.contributor.author | Pados, D. A. | en |
| dc.contributor.author | Batalama, S. N. | en |
| dc.date.accessioned | 2015-11-24T17:01:00Z | |
| dc.date.available | 2015-11-24T17:01:00Z | |
| dc.identifier.issn | 1051-8215 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/10853 | |
| dc.rights | Default Licence | - |
| dc.subject | adaptive filtering | en |
| dc.subject | antenna arrays | en |
| dc.subject | direct-sequence code-division multiple access (ds-cdma) | en |
| dc.subject | rate distortion optimization | en |
| dc.subject | small sample support | en |
| dc.subject | wireless video transmission | en |
| dc.subject | binary signature sets | en |
| dc.subject | punctured convolutional-codes | en |
| dc.subject | total-squared-correlation | en |
| dc.subject | karystinos-pados bounds | en |
| dc.subject | scalable video | en |
| dc.subject | filter | en |
| dc.subject | channel | en |
| dc.title | Layered video transmission over wireless multirate DS-CDMA links | en |
| heal.abstract | In this paper, we consider the. transmission of video over wireless direct-sequence code-division multiple access (DS-CDMA) channels. A layered (scalable) video source codec is used. The layers may be time-multiplexed and transmitted over a single CDMA channel or each layer can be transmitted over a different CDMA channel. For the latter case, spreading codes of different lengths are allowed for each CDMA channel (multirate CDMA). Thus, a different number of chips per bit can be used for the transmission of each scalable layer. For a given fixed energy value per chip and chip rate, the selection of a spreading code length affects the transmitted energy per bit and bit rate for each scalable layer. An MPEG-4 source encoder is used to provide a two-layer signal-to-noise-ratio scalable bit stream. Each of the two layers is channel-coded using rate-compatible punctured convolutional codes. Then, the data are interleaved, spread, carrier-modulated, and transmitted over the wireless channel. A multipath Rayleigh fading channel model is assumed. At the other end, the signal is collected by an antenna array front. After carrier demodulation, multiple-access-interference suppressing despreading is performed using adaptive space-time auxiliary-vector (AV) filters. The choice of the AV space-time receiver is dictated by realistic channel fading rates that limit the data record available for receiver adaptation and redesign. Our experimental results demonstrate the effectiveness of such a multirate DS-CDMA system for wireless video transmission. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | Doi 10.1109/Tcsvt.2005.856922 | - |
| heal.journalName | Ieee Transactions on Circuits and Systems for Video Technology | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2005 | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Ηλεκτρονικών Υπολογιστών και Πληροφορικής | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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