All-digital cancellation technique to mitigate self-jamming in uplink carrier aggregation in cellular handsets

Dabag, Hayg-Taniel; Gheidi, Hamed; Gudem, Prasad S.; Asbeck, P.M.

doi:10.1109/mwsym.2013.6697664

Cited by 14 publications

(16 citation statements)

References 5 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SINR after cancellation is estimated based on the EVM and (22) and shows 12-20-dB improvement. Similar results for the SISO filter were obtained and reported in [9] for a directly coupled system.…”

Section: ) Duplexer and Switch Distortionsupporting

confidence: 88%

“…The adaptive distortion canceller shown in Fig. 6 has been presented in our prior work [9]. It implements a singleinput single-output (SISO) distortion canceller, where is calculated prior to the adaptive filter.…”

Section: A Interference Estimationmentioning

confidence: 99%

“…Equation (6) can be written as (9) The latter form has the advantage that the problem is in linear regression form. Given a -point data set and defining (10)…”

Section: B Multiple-input Single-output Adaptive Distortion Cancellermentioning

confidence: 99%

“…For brevity, the performance of only the MISO filter is discussed in detail in this paper. The performance of the SISO filter has been presented in our prior work [9]. In a first experiment, a desired received signal was injected 10 dB below Fig.…”

Section: ) Duplexer and Switch Distortionmentioning

confidence: 99%

See 3 more Smart Citations

All-Digital Cancellation Technique to Mitigate Receiver Desensitization in Uplink Carrier Aggregation in Cellular Handsets

Dabag¹,

Gheidi²,

Farsi³

et al. 2013

IEEE Trans. Microwave Theory Techn.

Self Cite

View full text Add to dashboard Cite

Future handsets will employ uplink carrier aggregation to increase transmit data rates. This can lead to significant receiver desensitization for a number of LTE band combinations, because of the cross-modulation products created by the nonlinearity of antenna switches and duplexers in the RF front end. To mitigate this effect, an all-digital cancellation algorithm is proposed that relies solely on the digital representation of the signals, a peak covariance search for time alignment, and an adaptive distortion canceller. The recursive least squares (RLS) algorithm is used to find the optimal coefficients for the adaptive filter. Employing the distortion canceller improved the signal-to-interference-plus-noise ratio (SINR) and error-vector-magnitude (EVM) of the desired received signal by up to 20 dB.

show abstract

Section: ) Duplexer and Switch Distortionsupporting

confidence: 88%

Section: A Interference Estimationmentioning

confidence: 99%

“…Equation (6) can be written as (9) The latter form has the advantage that the problem is in linear regression form. Given a -point data set and defining (10)…”

Section: B Multiple-input Single-output Adaptive Distortion Cancellermentioning

confidence: 99%

Section: ) Duplexer and Switch Distortionmentioning

confidence: 99%

See 2 more Smart Citations

All-Digital Cancellation Technique to Mitigate Receiver Desensitization in Uplink Carrier Aggregation in Cellular Handsets

Dabag¹,

Gheidi²,

Farsi³

et al. 2013

IEEE Trans. Microwave Theory Techn.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Previous works investigate some of those problems which are tackled using DSP techniques [17][18][19][20][21]. Another critical issue that appears is the Tx modulated spur interference problem that occurs in LTE-CA frequency division duplex (FDD) transceivers [22,23].…”

Section: Fig 2 Tx Induced Modulated Spurs and Imd2 Interference Illmentioning

confidence: 99%

Digitally-intensive transceivers for future mobile communications—emerging trends and challenges

Kanumalli

Buckel

Preissl

et al. 2018

Elektrotech. Inftech.

View full text Add to dashboard Cite

This article presents an overview of the major trends and challenges involved with the design of multi-band, multi-standard digitallyintensive radio frequency transceivers for next generation mobile communications. In addition, we discuss in detail one aspect of the implementation challenges, namely the occurrence and cancellation of self-interference especially in carrier aggregation modes. For that, we present a novel digital cancellation technique to jointly compensate the self-interference caused by transmit (Tx) modulated spurs and Tx second order intermodulation distortion products (IMD2) in the receiver. This architecture exploits the underlying relation between both types of interference and offers a low-complexity solution to mitigate the Tx-IMD2 interference. Simulation results show, that the proposed technique significantly suppresses both types of interference and restores the signal-to-noise ratio of the wanted signal within 0.3 dB from its value in the absence of interference, thereby achieving 30 dB of cancellation.Keywords: RF; mobile communications; wireless communications; signal processing; interference cancellation; carrier aggregation Digital unterstützte Hochfrequenz-Transceiver für den Mobilfunk der Zukunft -Trends und Herausforderungen. Dieser Artikel gibt zunächst einen Überblick über aktuellen Trends und Herausforderungen bei der Entwicklung von Multi-Band, Multi-Standard HF-Transceivern für die nächste Mobilfunk-Generation, die einen hohen Anteil an digitaler Elektronik aufweisen. Im Anschluss wird im Detail auf ein spezielles Problem solcher Transceiver eingegangen, nämlich der Selbst-Interferenz, die durch den eigenen Sender verursacht wird und die vor allem im Carrier Aggregation-Modus auftritt. Die Problematik wird nicht nur detailliert erklärt, diese Arbeit präsentiert auch eine Methode zur Unterdrückung von Selbst-Interferenz mit den Mitteln der digitalen

show abstract

Tone injection‐based cancellation technique for nonlinear distortion reduction of modulated signals in BAW resonators

Gonzalez-Rodriguez

Collado

Gonzalez-Arbesu

et al. 2020

Micro & Optical Tech Letters

View full text Add to dashboard Cite

A technique for the reduction of third‐order intermodulation distortion (IMD3) occurring in bulk acoustic wave (BAW) filters and multiplexers is presented. The method consists of using the intrinsic second‐order intermodulation distortion generated by BAW filters and multiplexers themselves by injecting an externally controlled amplitude and phase modulated signal at low frequency to compensate for the IMD3. The proposed technique has been experimentally verified by performing IMD3 measurements in a single BAW resonator subject to several modulated signals under a nonlinear scenario.

show abstract

All-digital cancellation technique to mitigate self-jamming in uplink carrier aggregation in cellular handsets

Cited by 14 publications

References 5 publications

All-Digital Cancellation Technique to Mitigate Receiver Desensitization in Uplink Carrier Aggregation in Cellular Handsets

All-Digital Cancellation Technique to Mitigate Receiver Desensitization in Uplink Carrier Aggregation in Cellular Handsets

Digitally-intensive transceivers for future mobile communications—emerging trends and challenges

Tone injection‐based cancellation technique for nonlinear distortion reduction of modulated signals in BAW resonators

Contact Info

Product

Resources

About