Automatic modulation recognition algorithm for MQAM signal
An automatic modulation recognition algorithm for MQAM signal was proposed.Firstly,the feature parameter F based on the fourth order cumulants was constructed to classify the square QAM and the cross QAM.Secondly,the compactness of zero center normalized instantaneous amplitude was calculated to ide...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2019-08-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2019168/ |
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| author | Huadi ZHANG Huaxun LOU |
| author_facet | Huadi ZHANG Huaxun LOU |
| author_sort | Huadi ZHANG |
| collection | DOAJ |
| description | An automatic modulation recognition algorithm for MQAM signal was proposed.Firstly,the feature parameter F based on the fourth order cumulants was constructed to classify the square QAM and the cross QAM.Secondly,the compactness of zero center normalized instantaneous amplitude was calculated to identify the 16QAM from the square QAM.Thirdly,the baud rate was estimated by frequency spectrum of amplitude square,and timing was synchronized to delete the ISI and resume the relatively ideal constellations.And aiming at the 32QAM and the 128QAM,two different clustering radii were set,and clustering point density was got respectively by the subtractive clustering algorithm,and then the 32QAM and the 128QAM was classified depending on the difference of density value.In the same way,the 64QAM and the 256QAM were classified.The proposed algorithm can recognize five kinds of QAM signals，including 16QAM signals,32QAM signals,64QAM signals,128QAM signal and 256QAM signal without prior knowledge of frequency and baud rate.Furthermore,the proposed algorithm does not need complex iterative process,which can be applied in practical signal recognition. |
| format | Article |
| id | doaj-art-ef9fd9f90ea248a8a0e1663fcb79f1f8 |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2019-08-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-ef9fd9f90ea248a8a0e1663fcb79f1f82025-01-14T07:17:37ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2019-08-014020021159729297Automatic modulation recognition algorithm for MQAM signalHuadi ZHANGHuaxun LOUAn automatic modulation recognition algorithm for MQAM signal was proposed.Firstly,the feature parameter F based on the fourth order cumulants was constructed to classify the square QAM and the cross QAM.Secondly,the compactness of zero center normalized instantaneous amplitude was calculated to identify the 16QAM from the square QAM.Thirdly,the baud rate was estimated by frequency spectrum of amplitude square,and timing was synchronized to delete the ISI and resume the relatively ideal constellations.And aiming at the 32QAM and the 128QAM,two different clustering radii were set,and clustering point density was got respectively by the subtractive clustering algorithm,and then the 32QAM and the 128QAM was classified depending on the difference of density value.In the same way,the 64QAM and the 256QAM were classified.The proposed algorithm can recognize five kinds of QAM signals，including 16QAM signals,32QAM signals,64QAM signals,128QAM signal and 256QAM signal without prior knowledge of frequency and baud rate.Furthermore,the proposed algorithm does not need complex iterative process,which can be applied in practical signal recognition.http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2019168/fourth-order cumulantcompactness of zero center normalized instantaneous amplitudeMQAMautomatic recognition |
| spellingShingle | Huadi ZHANG Huaxun LOU Automatic modulation recognition algorithm for MQAM signal Tongxin xuebao fourth-order cumulant compactness of zero center normalized instantaneous amplitude MQAM automatic recognition |
| title | Automatic modulation recognition algorithm for MQAM signal |
| title_full | Automatic modulation recognition algorithm for MQAM signal |
| title_fullStr | Automatic modulation recognition algorithm for MQAM signal |
| title_full_unstemmed | Automatic modulation recognition algorithm for MQAM signal |
| title_short | Automatic modulation recognition algorithm for MQAM signal |
| title_sort | automatic modulation recognition algorithm for mqam signal |
| topic | fourth-order cumulant compactness of zero center normalized instantaneous amplitude MQAM automatic recognition |
| url | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2019168/ |
| work_keys_str_mv | AT huadizhang automaticmodulationrecognitionalgorithmformqamsignal AT huaxunlou automaticmodulationrecognitionalgorithmformqamsignal |