| 1. |
- Björsell, Niclas, 1964-, et al.
(författare)
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A GNU radio-based signal detector for cognitive radio systems
- 2011
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Ingår i: 2011 IEEE International Instrumentation and Measurement Technology Conference (I2MTC). - New York : IEEE conference proceedings. - 9781424479351 ; , s. 1045-1049
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Konferensbidrag (refereegranskat)abstract
- This paper deals with the hardware and software architecture of a signal detector prototype. It is able to observe a wide band and to find, in such band, the empty or occupied channels. It is intended to be used either in telecommunication devices or in spectrum monitoring instruments working in the new scenarios of telecommunications, where a flexible and dynamic spectrum management will be introduced. The signal detector has been validated on simulated and emulated signals showing high detection percentages even with low signal to noise ratios.
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| 2. |
- Björsell, Niclas, 1964-, et al.
(författare)
-
A waveform digitizer-based automatic modulation classifier for a flexible spectrum management
- 2011
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Ingår i: Measurement. - : Elsevier BV. - 0263-2241 .- 1873-412X. ; 44:6, s. 1007-1017
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Tidskriftsartikel (refereegranskat)abstract
- The paper presents the development and validation of an automatic digital modulation classifier based on a waveform digitizer architecture. The proposed automatic digital modulation classifier can be used for signal recognition in the next generation telecommunication systems, characterized by a flexible and dynamic management of the radio spectrum. It has been implemented on a PC architecture, connected with two different types of waveform digitizers. The experimental validation has been carried out by means of actual telecommunication signals, even in presence of narrowband and wideband interference. (C) 2011 Elsevier Ltd. All rights reserved.
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| 3. |
- Björsell, Niclas, 1964-, et al.
(författare)
-
Automatic signal recognition for a flexible spectrum management
- 2009
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Ingår i: XIX IMEKO World Congress. - 9789638841001 ; , s. 568-573
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Konferensbidrag (refereegranskat)abstract
- The paper presents the prototype of an automatic digital modulation classifier, to be used for signal recognition in frequency bands managed in a flexible way. The prototype is based on a Data Acquisition System, consisting of an Analog-to-Digital converter embedded in an evaluation board, a frame grabber and a Personal Computer. The modulation classifier is able to recognize the most used digital modulations. An experimental validation of the realized prototype in a radio environment is also provided.
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| 4. |
- De Vito, Luca, et al.
(författare)
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A bayesian filtering - Approach for calibrating a look-up table used for ADC error correction
- 2005
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Ingår i: Instrumentation and Measurement Technology Conference, 2005. IMTC 2005. Proceedings of the IEEE. - : IEEE. - 9780780388796 ; , s. 293-297
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Konferensbidrag (refereegranskat)abstract
- The paper presents a new method for the correction of non-linearity errors in ADCs. The method has been designed to allow self calibration in systems where an internal signal can be generated, such as base stations for mobile communications. The method has been implemented and tested in simulation on the behavioral model of a commercial ADCs, and on a hardware setup composed by a data acquisition board and a distorting circuit.
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| 5. |
- De Vito, Luca, et al.
(författare)
-
Bayesian calibration of a lookup table for ADC error correction
- 2007
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Ingår i: IEEE Transactions on Instrumentation and Measurement. - 0018-9456 .- 1557-9662. ; 56:3, s. 873-878
-
Tidskriftsartikel (refereegranskat)abstract
- This paper presents a new method for the correction of nonlinearity errors in analog-to-digital converters (ADCs). The method has been designed to allow a self-calibration in systems where an internal signal can be generated, such as base stations for mobile communications. The method has been implemented and tested in simulation on the behavioral model of commercial ADCs and on a hardware setup composed by a data acquisition board and a distorting circuit.
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