Title :
Measuring Gain Imbalance and Quadrature Error in WiMAX Transmitters
Author :
Angrisani, Leopoldo ; Napolitano, Aniello ; Vadursi, Michele
Author_Institution :
Dipt. di Inf. e Sist., Univ. degli Studi di Napoli Federico II, Naples
Abstract :
The paper presents a new method for measuring the most common I/Q impairments affecting WiMAX transmitters, that are gain imbalance and quadrature error. The method operates on the signal at the output of the transmitter, acquired through a general purpose I/Q receiver. It is designed to correctly take into account the peculiarities of systems compliant to the standard IEEE 802.16-2004, such as the potentially noxious effects of impairments on signal normalization. The results of experiments carried out on standard-compliant signals are also given.
Keywords :
WiMax; gain measurement; radio transmitters; I-Q impairments; IEEE 802.16-2004 standard; WiMAX transmitters; gain imbalance; iterative approach; quadrature error; signal normalization; standard-compliant signals; Attenuation; Gain measurement; Guidelines; OFDM modulation; Q measurement; Signal design; Social implications of technology; Testing; Transmitters; WiMAX; Digital transmitter testing; Digital transmitter troubleshooting; I/Q impairments; Orthogonal Frequency Division Multiplexing; WiMAX;
Conference_Titel :
Instrumentation and Measurement Technology Conference Proceedings, 2008. IMTC 2008. IEEE
Conference_Location :
Victoria, BC
Print_ISBN :
978-1-4244-1540-3
Electronic_ISBN :
1091-5281
DOI :
10.1109/IMTC.2008.4547294
