Using SNR Estimator to Allocate Resource in CRAC for Downlink OFDMA Systems
碩士 === 國立臺北科技大學 === 電機工程系所 === 102 === In recent years, the research on cooperative communications has received much attention. By using relay stations (RSs) the transmission efficiency of downlink 4G communication system can be significantly improved. Furthermore, with the help of cognitive radio (...
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ndltd-TW-102TIT054420542019-05-15T21:42:32Z http://ndltd.ncl.edu.tw/handle/2jmchz Using SNR Estimator to Allocate Resource in CRAC for Downlink OFDMA Systems 訊雜比之估計及其於下行正交分頻多工合作式通訊系統頻譜資源分配之應用研究 Meng-Chiao Lin 林孟喬 碩士 國立臺北科技大學 電機工程系所 102 In recent years, the research on cooperative communications has received much attention. By using relay stations (RSs) the transmission efficiency of downlink 4G communication system can be significantly improved. Furthermore, with the help of cognitive radio (CR), the unauthorized user can borrow the bandwidth of authorized user, thus increasing the bandwidth usage efficiency, and alleviating the problem of traffic congestion. This thesis aims to estimate the signal-to-noise ratio (SNR) over the orthogonal frequency division multiple access (OFDMA) system, where additive white Gaussian noise (AWGN) channel and path loss are considered. The estimated SNR together with rely station and cooperative communications are then used for channel assignment in order to improve bandwidth usage efficiency. Finally, the transmission capacity evaluated based on the estimated SNR and real SNR are compared. The result shows that the overall error between them is only 3.5%, indicating the potential of the estimation scheme for transmission capacity prediction. 譚旦旭 2014 學位論文 ; thesis 48 zh-TW |
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碩士 === 國立臺北科技大學 === 電機工程系所 === 102 === In recent years, the research on cooperative communications has received much attention. By using relay stations (RSs) the transmission efficiency of downlink 4G communication system can be significantly improved. Furthermore, with the help of cognitive radio (CR), the unauthorized user can borrow the bandwidth of authorized user, thus increasing the bandwidth usage efficiency, and alleviating the problem of traffic congestion. This thesis aims to estimate the signal-to-noise ratio (SNR) over the orthogonal frequency division multiple access (OFDMA) system, where additive white Gaussian noise (AWGN) channel and path loss are considered. The estimated SNR together with rely station and cooperative communications are then used for channel assignment in order to improve bandwidth usage efficiency. Finally, the transmission capacity evaluated based on the estimated SNR and real SNR are compared. The result shows that the overall error between them is only 3.5%, indicating the potential of the estimation scheme for transmission capacity prediction.
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譚旦旭 |
author_facet |
譚旦旭 Meng-Chiao Lin 林孟喬 |
author |
Meng-Chiao Lin 林孟喬 |
spellingShingle |
Meng-Chiao Lin 林孟喬 Using SNR Estimator to Allocate Resource in CRAC for Downlink OFDMA Systems |
author_sort |
Meng-Chiao Lin |
title |
Using SNR Estimator to Allocate Resource in CRAC for Downlink OFDMA Systems |
title_short |
Using SNR Estimator to Allocate Resource in CRAC for Downlink OFDMA Systems |
title_full |
Using SNR Estimator to Allocate Resource in CRAC for Downlink OFDMA Systems |
title_fullStr |
Using SNR Estimator to Allocate Resource in CRAC for Downlink OFDMA Systems |
title_full_unstemmed |
Using SNR Estimator to Allocate Resource in CRAC for Downlink OFDMA Systems |
title_sort |
using snr estimator to allocate resource in crac for downlink ofdma systems |
publishDate |
2014 |
url |
http://ndltd.ncl.edu.tw/handle/2jmchz |
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1719117900126617600 |