Blind SNR estimation for OFDM signals in cognitive radio
The traditional blind SNR estimation algorithms had problems of poor performance and high computation complexity for OFDM systems in cognitive radio with low signal to noise ratio(SNR)and multi-path channel conditions,in view of which a novel blind SNR estimation method for orthogonal frequency divi...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Journal on Communications
2011-11-01
|
| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/doi/1000-436X(2011)11-0078-07/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841539941513822208 |
|---|---|
| author | Ming-qian LIU Bing-bing LI Ning-jie TANG Zhao LI |
| author_facet | Ming-qian LIU Bing-bing LI Ning-jie TANG Zhao LI |
| author_sort | Ming-qian LIU |
| collection | DOAJ |
| description | The traditional blind SNR estimation algorithms had problems of poor performance and high computation complexity for OFDM systems in cognitive radio with low signal to noise ratio(SNR)and multi-path channel conditions,in view of which a novel blind SNR estimation method for orthogonal frequency division multiplexing(OFDM)signals was proposed.Firstly,the channel order was roughly estimated by utilizing the characteristics of autocorrelation function to determine the data interval which was free of inter-symbol interference(ISI).Secondly,the signal average power was estimated by computing the autocorrelation values of data in the determined interval.Finally,the noise average power was estimated by utilizing the characteristics that the data in cyclic prefix which was replication of part useful data.So the SNR of the received signals could be estimated.The simulation results show that the proposed method doesn’t need any prior information and has better performance and lower computation complexity,which is more suitable for OFDM systems in cognitive radio. |
| format | Article |
| id | doaj-art-815aceb5731f49c7891c032b2261150f |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2011-11-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-815aceb5731f49c7891c032b2261150f2025-01-14T06:30:40ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2011-11-0132788459658813Blind SNR estimation for OFDM signals in cognitive radioMing-qian LIUBing-bing LINing-jie TANGZhao LIThe traditional blind SNR estimation algorithms had problems of poor performance and high computation complexity for OFDM systems in cognitive radio with low signal to noise ratio(SNR)and multi-path channel conditions,in view of which a novel blind SNR estimation method for orthogonal frequency division multiplexing(OFDM)signals was proposed.Firstly,the channel order was roughly estimated by utilizing the characteristics of autocorrelation function to determine the data interval which was free of inter-symbol interference(ISI).Secondly,the signal average power was estimated by computing the autocorrelation values of data in the determined interval.Finally,the noise average power was estimated by utilizing the characteristics that the data in cyclic prefix which was replication of part useful data.So the SNR of the received signals could be estimated.The simulation results show that the proposed method doesn’t need any prior information and has better performance and lower computation complexity,which is more suitable for OFDM systems in cognitive radio.http://www.joconline.com.cn/zh/article/doi/1000-436X(2011)11-0078-07/cognitive radioorthogonal frequency division multiplexingparameter estimationchannel orderautocorrelation function |
| spellingShingle | Ming-qian LIU Bing-bing LI Ning-jie TANG Zhao LI Blind SNR estimation for OFDM signals in cognitive radio Tongxin xuebao cognitive radio orthogonal frequency division multiplexing parameter estimation channel order autocorrelation function |
| title | Blind SNR estimation for OFDM signals in cognitive radio |
| title_full | Blind SNR estimation for OFDM signals in cognitive radio |
| title_fullStr | Blind SNR estimation for OFDM signals in cognitive radio |
| title_full_unstemmed | Blind SNR estimation for OFDM signals in cognitive radio |
| title_short | Blind SNR estimation for OFDM signals in cognitive radio |
| title_sort | blind snr estimation for ofdm signals in cognitive radio |
| topic | cognitive radio orthogonal frequency division multiplexing parameter estimation channel order autocorrelation function |
| url | http://www.joconline.com.cn/zh/article/doi/1000-436X(2011)11-0078-07/ |
| work_keys_str_mv | AT mingqianliu blindsnrestimationforofdmsignalsincognitiveradio AT bingbingli blindsnrestimationforofdmsignalsincognitiveradio AT ningjietang blindsnrestimationforofdmsignalsincognitiveradio AT zhaoli blindsnrestimationforofdmsignalsincognitiveradio |