Development of OFDM based Secondary Link: Some Experimental Results on USRP N210 Platform
Some experimental results of the concept development and practical implementation of an Orthogonal Frequency Division Multiplexing (OFDM) based secondary cognitive link are presented in this paper. The secondary link is realized using Universal Software Radio Peripheral (USRP) N210 platforms. For co...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Telecommunications Society, Academic Mind
2014-06-01
|
| Series: | Telfor Journal |
| Subjects: | |
| Online Access: |
http://journal.telfor.rs/Published/Vol6No1/Vol6No1_A6.pdf
|
| _version_ | 1818772118290038784 |
|---|---|
| author | M. Janjić M. Brković M. Erić |
| author_facet | M. Janjić M. Brković M. Erić |
| author_sort | M. Janjić |
| collection | DOAJ |
| description | Some experimental results of the concept development and practical implementation of an Orthogonal Frequency Division Multiplexing (OFDM) based secondary cognitive link are presented in this paper. The secondary link is realized using Universal Software Radio Peripheral (USRP) N210 platforms. For communication with USRP, we use MATLAB toolbox. Several algorithms are used to overcome transmission problems. Time-synchronization is achieved using a method based on auto-correlation of two sliding windows. Frequency offset estimation is performed using a phase offset between samples in a signal header, comprised of a sinusoid. A channel is estimated using predefined symbols inserted at the beginning of every frame, which enables channel equalization. Also, the cognitive feature of spectrum sensing and changing transmission parameters is implemented. A least-mean-square adaptive filter is introduced to offer time-synchronization error estimation as well as an alternative option for channel equalization. |
| first_indexed | 2024-12-18T10:04:16Z |
| format | Article |
| id | doaj.art-5a1fcfb2d3224397b6420d1359fd23f9 |
| institution | Directory Open Access Journal |
| issn | 1821-3251 |
| language | English |
| last_indexed | 2024-12-18T10:04:16Z |
| publishDate | 2014-06-01 |
| publisher | Telecommunications Society, Academic Mind |
| record_format | Article |
| series | Telfor Journal |
| spelling | doaj.art-5a1fcfb2d3224397b6420d1359fd23f92022-12-21T21:11:35ZengTelecommunications Society, Academic MindTelfor Journal1821-32512014-06-01613035Development of OFDM based Secondary Link: Some Experimental Results on USRP N210 PlatformM. JanjićM. BrkovićM. ErićSome experimental results of the concept development and practical implementation of an Orthogonal Frequency Division Multiplexing (OFDM) based secondary cognitive link are presented in this paper. The secondary link is realized using Universal Software Radio Peripheral (USRP) N210 platforms. For communication with USRP, we use MATLAB toolbox. Several algorithms are used to overcome transmission problems. Time-synchronization is achieved using a method based on auto-correlation of two sliding windows. Frequency offset estimation is performed using a phase offset between samples in a signal header, comprised of a sinusoid. A channel is estimated using predefined symbols inserted at the beginning of every frame, which enables channel equalization. Also, the cognitive feature of spectrum sensing and changing transmission parameters is implemented. A least-mean-square adaptive filter is introduced to offer time-synchronization error estimation as well as an alternative option for channel equalization. http://journal.telfor.rs/Published/Vol6No1/Vol6No1_A6.pdf Cognitive radioOFDMsecondary linkspectrum sensingUSRP platform |
| spellingShingle | M. Janjić M. Brković M. Erić Development of OFDM based Secondary Link: Some Experimental Results on USRP N210 Platform Telfor Journal Cognitive radio OFDM secondary link spectrum sensing USRP platform |
| title | Development of OFDM based Secondary Link: Some Experimental Results on USRP N210 Platform |
| title_full | Development of OFDM based Secondary Link: Some Experimental Results on USRP N210 Platform |
| title_fullStr | Development of OFDM based Secondary Link: Some Experimental Results on USRP N210 Platform |
| title_full_unstemmed | Development of OFDM based Secondary Link: Some Experimental Results on USRP N210 Platform |
| title_short | Development of OFDM based Secondary Link: Some Experimental Results on USRP N210 Platform |
| title_sort | development of ofdm based secondary link some experimental results on usrp n210 platform |
| topic | Cognitive radio OFDM secondary link spectrum sensing USRP platform |
| url |
http://journal.telfor.rs/Published/Vol6No1/Vol6No1_A6.pdf
|
| work_keys_str_mv | AT mjanjic developmentofofdmbasedsecondarylinksomeexperimentalresultsonusrpn210platform AT mbrkovic developmentofofdmbasedsecondarylinksomeexperimentalresultsonusrpn210platform AT meric developmentofofdmbasedsecondarylinksomeexperimentalresultsonusrpn210platform |