Two Improved Cancellation Techniques for Direct-Conversion Receivers
To solve the problems of carrier leakage and DC offset in direct-conversion receiver (DCR) system, the paper proposed two kinds of improved technology to overcome the problems in DCR system. One is the RF carrier cancellation technology; the traditional cancellation technology based on lumped parame...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Journal of Electrical and Computer Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/4253125 |
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| _version_ | 1832565854670159872 |
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| author | Xueyuan Hao Xiaohong Yan |
| author_facet | Xueyuan Hao Xiaohong Yan |
| author_sort | Xueyuan Hao |
| collection | DOAJ |
| description | To solve the problems of carrier leakage and DC offset in direct-conversion receiver (DCR) system, the paper proposed two kinds of improved technology to overcome the problems in DCR system. One is the RF carrier cancellation technology; the traditional cancellation technology based on lumped parameter filter can be easily influenced by distribution parameters, the improved circuits use a 3 db bridge to realize a 180-degree phase shifter, and the method can adapt to a wider range of RF frequency. Another is DC offset cancellation technique; a novel DC servo loop circuit is proposed to replace the traditional AC-coupled amplifier circuit. It can improve the integrity of the baseband signal and reduces the complexity of the subsequent software algorithm. Experimental results show that two kinds of improved technology can improve the performance of DCR and expand its scope of application. |
| format | Article |
| id | doaj-art-547319976c2e4a099eccd63d1e7324c5 |
| institution | Kabale University |
| issn | 2090-0147 2090-0155 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Electrical and Computer Engineering |
| spelling | doaj-art-547319976c2e4a099eccd63d1e7324c52025-02-03T01:06:20ZengWileyJournal of Electrical and Computer Engineering2090-01472090-01552016-01-01201610.1155/2016/42531254253125Two Improved Cancellation Techniques for Direct-Conversion ReceiversXueyuan Hao0Xiaohong Yan1Nanjing University of Posts and Telecommunications, Nanjing 210003, ChinaNanjing University of Posts and Telecommunications, Nanjing 210003, ChinaTo solve the problems of carrier leakage and DC offset in direct-conversion receiver (DCR) system, the paper proposed two kinds of improved technology to overcome the problems in DCR system. One is the RF carrier cancellation technology; the traditional cancellation technology based on lumped parameter filter can be easily influenced by distribution parameters, the improved circuits use a 3 db bridge to realize a 180-degree phase shifter, and the method can adapt to a wider range of RF frequency. Another is DC offset cancellation technique; a novel DC servo loop circuit is proposed to replace the traditional AC-coupled amplifier circuit. It can improve the integrity of the baseband signal and reduces the complexity of the subsequent software algorithm. Experimental results show that two kinds of improved technology can improve the performance of DCR and expand its scope of application.http://dx.doi.org/10.1155/2016/4253125 |
| spellingShingle | Xueyuan Hao Xiaohong Yan Two Improved Cancellation Techniques for Direct-Conversion Receivers Journal of Electrical and Computer Engineering |
| title | Two Improved Cancellation Techniques for Direct-Conversion Receivers |
| title_full | Two Improved Cancellation Techniques for Direct-Conversion Receivers |
| title_fullStr | Two Improved Cancellation Techniques for Direct-Conversion Receivers |
| title_full_unstemmed | Two Improved Cancellation Techniques for Direct-Conversion Receivers |
| title_short | Two Improved Cancellation Techniques for Direct-Conversion Receivers |
| title_sort | two improved cancellation techniques for direct conversion receivers |
| url | http://dx.doi.org/10.1155/2016/4253125 |
| work_keys_str_mv | AT xueyuanhao twoimprovedcancellationtechniquesfordirectconversionreceivers AT xiaohongyan twoimprovedcancellationtechniquesfordirectconversionreceivers |