2.50
Hdl Handle:
http://hdl.handle.net/10547/335911
Title:
Low cost estimation of IQ imbalance for direct conversion transmitters
Authors:
Li, Wei; Zhang, Yue ( 0000-0003-0017-1398 ) ; Huang, Li-ke; Cosmas, John ( 0000-0003-4378-5576 ) ; Maple, Carsten; Xiong, Jian
Abstract:
A low cost frequency-dependent (FD) I/Q imbalance self-compensation scheme is investigated in this paper. The direct conversion transmitters are widely used in wireless systems. However, the unwanted image-frequencies and distortions are inevitably introduced into the direct conversion system. This problem is even severer in wideband systems. Therefore, the accurate estimation and compensation of I/Q imbalance is crucial. The current compensation method is based on external instruments or internal feedback path which introduces additional impairments and is expensive. This paper proposes a low cost FD I/Q imbalance self-IQ-demodulation based compensation scheme without using external calibration instruments. First, the impairments of baseband and RF components are investigated. Further, I/Q imbalance model is developed. Then, the proposed a self-IQ-demodulation based compensation scheme is investigated. The overall FD I/Q imbalance parameters are estimated by developing a self-IQ-demodulation algorithm. To realize this self-IQ-demodulation algorithm, this paper introduces minor modifications to the current power detector circuit and specially designed training signal. Afterwards, the estimated parameters are applied to the baseband equivalent compensator. This sophisticated algorithm guarantees low computation complexity and low cost. The compensation performance is evaluated in laboratory measurement
Affiliation:
University of Bedfordshire
Citation:
Wei Li, Yue Zhang, Li-ke Huang, Cosmas, J., Maple, C., Jian Xiong, (2014) 'Low cost estimation of IQ imbalance for direct conversion transmitters', Broadband Multimedia Systems and Broadcasting (BMSB), 2014 IEEE International Symposium on, Bejing, China, 25-27 June, pp.1-6
Publisher:
IEEE
Issue Date:
Jun-2014
URI:
http://hdl.handle.net/10547/335911
DOI:
10.1109/BMSB.2014.6873469
Additional Links:
http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=6873469
Type:
Conference papers, meetings and proceedings
Language:
en
Appears in Collections:
Centre for Computer Graphics and Visualisation (CCGV)

Full metadata record

DC FieldValue Language
dc.contributor.authorLi, Weien
dc.contributor.authorZhang, Yueen
dc.contributor.authorHuang, Li-keen
dc.contributor.authorCosmas, Johnen
dc.contributor.authorMaple, Carstenen
dc.contributor.authorXiong, Jianen
dc.date.accessioned2014-11-21T11:00:53Z-
dc.date.available2014-11-21T11:00:53Z-
dc.date.issued2014-06-
dc.identifier.citationWei Li, Yue Zhang, Li-ke Huang, Cosmas, J., Maple, C., Jian Xiong, (2014) 'Low cost estimation of IQ imbalance for direct conversion transmitters', Broadband Multimedia Systems and Broadcasting (BMSB), 2014 IEEE International Symposium on, Bejing, China, 25-27 June, pp.1-6en
dc.identifier.doi10.1109/BMSB.2014.6873469-
dc.identifier.urihttp://hdl.handle.net/10547/335911-
dc.description.abstractA low cost frequency-dependent (FD) I/Q imbalance self-compensation scheme is investigated in this paper. The direct conversion transmitters are widely used in wireless systems. However, the unwanted image-frequencies and distortions are inevitably introduced into the direct conversion system. This problem is even severer in wideband systems. Therefore, the accurate estimation and compensation of I/Q imbalance is crucial. The current compensation method is based on external instruments or internal feedback path which introduces additional impairments and is expensive. This paper proposes a low cost FD I/Q imbalance self-IQ-demodulation based compensation scheme without using external calibration instruments. First, the impairments of baseband and RF components are investigated. Further, I/Q imbalance model is developed. Then, the proposed a self-IQ-demodulation based compensation scheme is investigated. The overall FD I/Q imbalance parameters are estimated by developing a self-IQ-demodulation algorithm. To realize this self-IQ-demodulation algorithm, this paper introduces minor modifications to the current power detector circuit and specially designed training signal. Afterwards, the estimated parameters are applied to the baseband equivalent compensator. This sophisticated algorithm guarantees low computation complexity and low cost. The compensation performance is evaluated in laboratory measurementen
dc.language.isoenen
dc.publisherIEEEen
dc.relation.urlhttp://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=6873469en
dc.subjectdemodulationen
dc.subjectradio transmittersen
dc.titleLow cost estimation of IQ imbalance for direct conversion transmittersen
dc.typeConference papers, meetings and proceedingsen
dc.contributor.departmentUniversity of Bedfordshireen
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