Measuring I/Q Impairments in WiMAX Transmitters

This paper presents a new method for measuring the I / Q impairments affecting the worldwide interoperability for microwave access (WiMax) transmitters through the analysis of the signal acquired through a general-purpose I / Q receiver. Based on a model of the effects of the I / Q impairments on th...

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Veröffentlicht in:	IEEE transactions on instrumentation and measurement 2009-05, Vol.58 (5), p.1299-1306
Hauptverfasser:	Angrisani, L., Napolitano, A., Vadursi, M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Attenuation Frequency division multiplexing Guidelines I/Q impairments Impairment Instrumentation Interoperability Mathematical models Microwaves Multiplexing OFDM modulation orthogonal frequency-division multiplexing (OFDM) Q measurement Signal analysis Social implications of technology Testing transmitter testing transmitter troubleshooting Transmitters WiMAX worldwide interoperability for microwave access (WiMAX)
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Beschreibung
Zusammenfassung:	This paper presents a new method for measuring the I / Q impairments affecting the worldwide interoperability for microwave access (WiMax) transmitters through the analysis of the signal acquired through a general-purpose I / Q receiver. Based on a model of the effects of the I / Q impairments on the output signal that is suitable for orthogonal frequency-division multiplexing (OFDM) systems like WiMax, the method is designed to correctly take into account the peculiarities of systems compliant with the IEEE 802.16-2004 standard, such as the potentially noxious effects of the impairments on signal normalization and threshold decisions. The results of the experiments carried out on the standard-compliant signals are given.
ISSN:	0018-9456 1557-9662
DOI:	10.1109/TIM.2008.2009141