Reference receiver enhanced digital linearization of wideband direct-conversion receivers

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Reference receiver enhanced digital linearization of wideband direct-conversion receivers. / Marttila, Jaakko; Allén, Markus; Kosunen, Marko; Stadius, Kari; Ryynänen, Jussi; Valkama, Mikko.

In: IEEE Transactions on Microwave Theory and Techniques, Vol. 65, No. 2, 2638840, 01.02.2017, p. 607-620.

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@article{0821c77098ed4a3db4c4760f405afb59,
title = "Reference receiver enhanced digital linearization of wideband direct-conversion receivers",
abstract = "This paper proposes two digital receiver (RX) linearization and in-phase/quadrature (I/Q) correction solutions, where an additional reference RX (ref-RX) chain is adopted in order to obtain a more linear observation, in particular, of the strong incoming signals. This is accomplished with reduced RF gain in the ref-RX in order to avoid nonlinear distortion therein. In digital domain, the signal observed by the ref-RX is exploited in linearizing the main RX. This allows combining the sensitivity of the main RX and the linearity of the lower gain ref-RX. The proposed digital processing solutions for implementing the linearization are feedforward interference cancelation and nonlinearity inversion, which are both adapted blindly, without a priori information of the received signals or RX nonlinearity characteristics. The linearization solutions enable flexible suppression of nonlinear distortion stemming from both the RF and analog baseband components of different orders. Especially, wideband multicarrier RXs, where significant demands are set for the RX linearity and I/Q matching, are targeted. Using comprehensive RF measurements and realistic base-station scale components, an RX blocker tolerance improvement of 23 dB and a weak carrier signal-to-noise-and-distortion ratio gain of 19 dB are demonstrated with combined linearization and I/Q correction.",
keywords = "Adaptive signal processing, Direct-conversion receiver (DCR), In-phase/quadrature (I/Q) imbalance, Interference cancelation, Intermodulation distortion (IMD), Linearization techniques, Mirror-frequency interference (MFI), Nonlinear distortion",
author = "Jaakko Marttila and Markus All{\'e}n and Marko Kosunen and Kari Stadius and Jussi Ryyn{\"a}nen and Mikko Valkama",
year = "2017",
month = "2",
day = "1",
doi = "10.1109/TMTT.2016.2638840",
language = "English",
volume = "65",
pages = "607--620",
journal = "IEEE Transactions on Microwave Theory and Techniques",
issn = "0018-9480",
number = "2",

}

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TY - JOUR

T1 - Reference receiver enhanced digital linearization of wideband direct-conversion receivers

AU - Marttila, Jaakko

AU - Allén, Markus

AU - Kosunen, Marko

AU - Stadius, Kari

AU - Ryynänen, Jussi

AU - Valkama, Mikko

PY - 2017/2/1

Y1 - 2017/2/1

N2 - This paper proposes two digital receiver (RX) linearization and in-phase/quadrature (I/Q) correction solutions, where an additional reference RX (ref-RX) chain is adopted in order to obtain a more linear observation, in particular, of the strong incoming signals. This is accomplished with reduced RF gain in the ref-RX in order to avoid nonlinear distortion therein. In digital domain, the signal observed by the ref-RX is exploited in linearizing the main RX. This allows combining the sensitivity of the main RX and the linearity of the lower gain ref-RX. The proposed digital processing solutions for implementing the linearization are feedforward interference cancelation and nonlinearity inversion, which are both adapted blindly, without a priori information of the received signals or RX nonlinearity characteristics. The linearization solutions enable flexible suppression of nonlinear distortion stemming from both the RF and analog baseband components of different orders. Especially, wideband multicarrier RXs, where significant demands are set for the RX linearity and I/Q matching, are targeted. Using comprehensive RF measurements and realistic base-station scale components, an RX blocker tolerance improvement of 23 dB and a weak carrier signal-to-noise-and-distortion ratio gain of 19 dB are demonstrated with combined linearization and I/Q correction.

AB - This paper proposes two digital receiver (RX) linearization and in-phase/quadrature (I/Q) correction solutions, where an additional reference RX (ref-RX) chain is adopted in order to obtain a more linear observation, in particular, of the strong incoming signals. This is accomplished with reduced RF gain in the ref-RX in order to avoid nonlinear distortion therein. In digital domain, the signal observed by the ref-RX is exploited in linearizing the main RX. This allows combining the sensitivity of the main RX and the linearity of the lower gain ref-RX. The proposed digital processing solutions for implementing the linearization are feedforward interference cancelation and nonlinearity inversion, which are both adapted blindly, without a priori information of the received signals or RX nonlinearity characteristics. The linearization solutions enable flexible suppression of nonlinear distortion stemming from both the RF and analog baseband components of different orders. Especially, wideband multicarrier RXs, where significant demands are set for the RX linearity and I/Q matching, are targeted. Using comprehensive RF measurements and realistic base-station scale components, an RX blocker tolerance improvement of 23 dB and a weak carrier signal-to-noise-and-distortion ratio gain of 19 dB are demonstrated with combined linearization and I/Q correction.

KW - Adaptive signal processing

KW - Direct-conversion receiver (DCR)

KW - In-phase/quadrature (I/Q) imbalance

KW - Interference cancelation

KW - Intermodulation distortion (IMD)

KW - Linearization techniques

KW - Mirror-frequency interference (MFI)

KW - Nonlinear distortion

UR - http://www.scopus.com/inward/record.url?scp=85009932286&partnerID=8YFLogxK

U2 - 10.1109/TMTT.2016.2638840

DO - 10.1109/TMTT.2016.2638840

M3 - Article

AN - SCOPUS:85009932286

VL - 65

SP - 607

EP - 620

JO - IEEE Transactions on Microwave Theory and Techniques

JF - IEEE Transactions on Microwave Theory and Techniques

SN - 0018-9480

IS - 2

M1 - 2638840

ER -

ID: 13560353