Performance of Predictor Based Link Adaptation Algorithms
The presented paper deals with the link adaptation algorithms in mobile radio access networks based on Wideband Code Division Multiple Access (WCDMA). The mobile radio channel has a significant impact on the transmitted signal between User Equipment (UE) and Base Station (BS). The character of envir...
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| Format: | Article |
| Language: | English |
| Published: |
Spolecnost pro radioelektronicke inzenyrstvi
2009-12-01
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| Series: | Radioengineering |
| Subjects: | |
| Online Access: | http://www.radioeng.cz/fulltexts/2009/09_04_503_508.pdf |
| _version_ | 1818021225506537472 |
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| author | V. Psenak V. Wieser |
| author_facet | V. Psenak V. Wieser |
| author_sort | V. Psenak |
| collection | DOAJ |
| description | The presented paper deals with the link adaptation algorithms in mobile radio access networks based on Wideband Code Division Multiple Access (WCDMA). The mobile radio channel has a significant impact on the transmitted signal between User Equipment (UE) and Base Station (BS). The character of environment (e.g. number of received reflections) and increasing UE velocity cause unfavorable signal fadings, which have a major impact on the received signal. Due to this fact and the principle of WCDMA, fast power adaptation is essential for mobile radio access networks based on WCDMA. The prediction of mobile radio channel near-future state is one of the possible approaches how to span its unfavorable state. According to this assumption, we have improved the basic link adaptation algorithm (used to control properties of transmitter) to predictor based link adaptation algorithm. This contribution comprises the performance of basic link adaptation algorithm and predictor based algorithms, which support both variable (multi-bit) and fixed (singlebit) power steps to modify transmitter output power level. The link adaptation algorithms were simulated under various average UE velocities in urban environment. New algorithms were designed to increase the efficiency of data transmission in uplink direction. |
| first_indexed | 2024-04-14T08:15:56Z |
| format | Article |
| id | doaj.art-d7a6d444c22a4b9c9f568de7dce2eb9b |
| institution | Directory Open Access Journal |
| issn | 1210-2512 |
| language | English |
| last_indexed | 2024-04-14T08:15:56Z |
| publishDate | 2009-12-01 |
| publisher | Spolecnost pro radioelektronicke inzenyrstvi |
| record_format | Article |
| series | Radioengineering |
| spelling | doaj.art-d7a6d444c22a4b9c9f568de7dce2eb9b2022-12-22T02:04:24ZengSpolecnost pro radioelektronicke inzenyrstviRadioengineering1210-25122009-12-01184503508Performance of Predictor Based Link Adaptation AlgorithmsV. PsenakV. WieserThe presented paper deals with the link adaptation algorithms in mobile radio access networks based on Wideband Code Division Multiple Access (WCDMA). The mobile radio channel has a significant impact on the transmitted signal between User Equipment (UE) and Base Station (BS). The character of environment (e.g. number of received reflections) and increasing UE velocity cause unfavorable signal fadings, which have a major impact on the received signal. Due to this fact and the principle of WCDMA, fast power adaptation is essential for mobile radio access networks based on WCDMA. The prediction of mobile radio channel near-future state is one of the possible approaches how to span its unfavorable state. According to this assumption, we have improved the basic link adaptation algorithm (used to control properties of transmitter) to predictor based link adaptation algorithm. This contribution comprises the performance of basic link adaptation algorithm and predictor based algorithms, which support both variable (multi-bit) and fixed (singlebit) power steps to modify transmitter output power level. The link adaptation algorithms were simulated under various average UE velocities in urban environment. New algorithms were designed to increase the efficiency of data transmission in uplink direction.www.radioeng.cz/fulltexts/2009/09_04_503_508.pdfWCDMA based mobile radio access networkslink adaptationprediction methodsmobile radio channel. |
| spellingShingle | V. Psenak V. Wieser Performance of Predictor Based Link Adaptation Algorithms Radioengineering WCDMA based mobile radio access networks link adaptation prediction methods mobile radio channel. |
| title | Performance of Predictor Based Link Adaptation Algorithms |
| title_full | Performance of Predictor Based Link Adaptation Algorithms |
| title_fullStr | Performance of Predictor Based Link Adaptation Algorithms |
| title_full_unstemmed | Performance of Predictor Based Link Adaptation Algorithms |
| title_short | Performance of Predictor Based Link Adaptation Algorithms |
| title_sort | performance of predictor based link adaptation algorithms |
| topic | WCDMA based mobile radio access networks link adaptation prediction methods mobile radio channel. |
| url | http://www.radioeng.cz/fulltexts/2009/09_04_503_508.pdf |
| work_keys_str_mv | AT vpsenak performanceofpredictorbasedlinkadaptationalgorithms AT vwieser performanceofpredictorbasedlinkadaptationalgorithms |