@InProceedings{6952177,
  author = {A. Kiayani and M. Abdelaziz and L. Anttila and V. Lehtinen and M. Valkama},
  booktitle = {2014 22nd European Signal Processing Conference (EUSIPCO)},
  title = {DSP-based suppression of spurious emissions at RX band in carrier aggregation FDD transceivers},
  year = {2014},
  pages = {591-595},
  abstract = {In frequency division duplex transceivers employing non-contiguous carrier aggregation (CA) transmission, achieving sufficient isolation between transmit and receive chains using radio frequency filtering alone is increasingly difficult. Particularly challenging problem in this context is spurious intermodulation (IM) components due to nonlinear power amplifier (PA), which may easily overlap the receiver band. With realistic duplex filters, the residual spurious IM at RX band can be several dBs stronger than the thermal noise floor, leading to own receiver desensitization. In this paper, we carry out detailed signal modeling of spurious emissions due to wideband PAs at the third-order IM band. Stemming from this modeling, and using the known transmit data, we present an efficient nonlinear digital identification and cancellation technique to suppress the unwanted IM components at RX band. The proposed technique is verified with computer simulations, showing excellent calibration properties, hence relaxing filtering and duplexing distance requirements in spectrally-agile CA transceivers.},
  keywords = {digital signal processing chips;filtering theory;frequency division multiplexing;intermodulation;radio transceivers;radiofrequency integrated circuits;radiofrequency power amplifiers;wideband amplifiers;DSP-based suppression;spurious emission suppression;RX band;carrier aggregation FDD transceivers;frequency division duplex transceivers;noncontiguous carrier aggregation transmission;CA transmission;receive chains;transmit chains;radio frequency filtering;spurious intermodulation components;nonlinear power amplifier;residual spurious IM;realistic duplex filters;receiver band;thermal noise floor;receiver desensitization;signal modeling;wideband PAs;third-order IM band;nonlinear digital identification;digital cancellation technique;unwanted IM component suppression;computer simulations;relaxing filtering;duplexing distance;spectrally-agile CA transceivers;calibration properties;Transceivers;Abstracts;Cancellation;carrier aggregation;duplexer isolation;frequency division duplexing;intermodulation;LTE-Advanced;power amplifier;spurious emissions},
  issn = {2076-1465},
  month = {Sep.},
  url = {https://www.eurasip.org/proceedings/eusipco/eusipco2014/html/papers/1569914303.pdf},
}

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Particularly challenging problem in this context is spurious intermodulation (IM) components due to nonlinear power amplifier (PA), which may easily overlap the receiver band. With realistic duplex filters, the residual spurious IM at RX band can be several dBs stronger than the thermal noise floor, leading to own receiver desensitization. In this paper, we carry out detailed signal modeling of spurious emissions due to wideband PAs at the third-order IM band. Stemming from this modeling, and using the known transmit data, we present an efficient nonlinear digital identification and cancellation technique to suppress the unwanted IM components at RX band. The proposed technique is verified with computer simulations, showing excellent calibration properties, hence relaxing filtering and duplexing distance requirements in spectrally-agile CA transceivers.","keywords":"digital signal processing chips;filtering theory;frequency division multiplexing;intermodulation;radio transceivers;radiofrequency integrated circuits;radiofrequency power amplifiers;wideband amplifiers;DSP-based suppression;spurious emission suppression;RX band;carrier aggregation FDD transceivers;frequency division duplex transceivers;noncontiguous carrier aggregation transmission;CA transmission;receive chains;transmit chains;radio frequency filtering;spurious intermodulation components;nonlinear power amplifier;residual spurious IM;realistic duplex filters;receiver band;thermal noise floor;receiver desensitization;signal modeling;wideband PAs;third-order IM band;nonlinear digital identification;digital cancellation technique;unwanted IM component suppression;computer simulations;relaxing filtering;duplexing distance;spectrally-agile CA transceivers;calibration properties;Transceivers;Abstracts;Cancellation;carrier aggregation;duplexer isolation;frequency division duplexing;intermodulation;LTE-Advanced;power amplifier;spurious emissions","issn":"2076-1465","month":"Sep.","url":"https://www.eurasip.org/proceedings/eusipco/eusipco2014/html/papers/1569914303.pdf","bibtex":"@InProceedings{6952177,\n author = {A. Kiayani and M. Abdelaziz and L. Anttila and V. Lehtinen and M. Valkama},\n booktitle = {2014 22nd European Signal Processing Conference (EUSIPCO)},\n title = {DSP-based suppression of spurious emissions at RX band in carrier aggregation FDD transceivers},\n year = {2014},\n pages = {591-595},\n abstract = {In frequency division duplex transceivers employing non-contiguous carrier aggregation (CA) transmission, achieving sufficient isolation between transmit and receive chains using radio frequency filtering alone is increasingly difficult. Particularly challenging problem in this context is spurious intermodulation (IM) components due to nonlinear power amplifier (PA), which may easily overlap the receiver band. With realistic duplex filters, the residual spurious IM at RX band can be several dBs stronger than the thermal noise floor, leading to own receiver desensitization. In this paper, we carry out detailed signal modeling of spurious emissions due to wideband PAs at the third-order IM band. Stemming from this modeling, and using the known transmit data, we present an efficient nonlinear digital identification and cancellation technique to suppress the unwanted IM components at RX band. The proposed technique is verified with computer simulations, showing excellent calibration properties, hence relaxing filtering and duplexing distance requirements in spectrally-agile CA transceivers.},\n keywords = {digital signal processing chips;filtering theory;frequency division multiplexing;intermodulation;radio transceivers;radiofrequency integrated circuits;radiofrequency power amplifiers;wideband amplifiers;DSP-based suppression;spurious emission suppression;RX band;carrier aggregation FDD transceivers;frequency division duplex transceivers;noncontiguous carrier aggregation transmission;CA transmission;receive chains;transmit chains;radio frequency filtering;spurious intermodulation components;nonlinear power amplifier;residual spurious IM;realistic duplex filters;receiver band;thermal noise floor;receiver desensitization;signal modeling;wideband PAs;third-order IM band;nonlinear digital identification;digital cancellation technique;unwanted IM component suppression;computer simulations;relaxing filtering;duplexing distance;spectrally-agile CA transceivers;calibration properties;Transceivers;Abstracts;Cancellation;carrier aggregation;duplexer isolation;frequency division duplexing;intermodulation;LTE-Advanced;power amplifier;spurious emissions},\n issn = {2076-1465},\n month = {Sep.},\n url = {https://www.eurasip.org/proceedings/eusipco/eusipco2014/html/papers/1569914303.pdf},\n}\n\n","author_short":["Kiayani, A.","Abdelaziz, M.","Anttila, L.","Lehtinen, V.","Valkama, M."],"key":"6952177","id":"6952177","bibbaseid":"kiayani-abdelaziz-anttila-lehtinen-valkama-dspbasedsuppressionofspuriousemissionsatrxbandincarrieraggregationfddtransceivers-2014","role":"author","urls":{"Paper":"https://www.eurasip.org/proceedings/eusipco/eusipco2014/html/papers/1569914303.pdf"},"keyword":["digital signal processing chips;filtering theory;frequency division multiplexing;intermodulation;radio transceivers;radiofrequency integrated circuits;radiofrequency power amplifiers;wideband amplifiers;DSP-based suppression;spurious emission suppression;RX band;carrier aggregation FDD transceivers;frequency division duplex transceivers;noncontiguous carrier aggregation transmission;CA transmission;receive chains;transmit chains;radio frequency filtering;spurious intermodulation components;nonlinear power amplifier;residual spurious IM;realistic duplex filters;receiver band;thermal noise floor;receiver desensitization;signal modeling;wideband PAs;third-order IM band;nonlinear digital identification;digital cancellation technique;unwanted IM component suppression;computer simulations;relaxing filtering;duplexing distance;spectrally-agile CA transceivers;calibration properties;Transceivers;Abstracts;Cancellation;carrier aggregation;duplexer isolation;frequency division duplexing;intermodulation;LTE-Advanced;power amplifier;spurious emissions"],"metadata":{"authorlinks":{}}},"bibtype":"inproceedings","biburl":"https://raw.githubusercontent.com/Roznn/EUSIPCO/main/eusipco2014url.bib","dataSources":["A2ezyFL6GG6na7bbs"],"keywords":["digital signal processing chips;filtering theory;frequency division multiplexing;intermodulation;radio transceivers;radiofrequency integrated circuits;radiofrequency power amplifiers;wideband amplifiers;dsp-based suppression;spurious emission suppression;rx band;carrier aggregation fdd transceivers;frequency division duplex transceivers;noncontiguous carrier aggregation transmission;ca transmission;receive chains;transmit chains;radio frequency filtering;spurious intermodulation components;nonlinear power amplifier;residual spurious im;realistic duplex filters;receiver band;thermal noise floor;receiver desensitization;signal modeling;wideband pas;third-order im band;nonlinear digital identification;digital cancellation technique;unwanted im component suppression;computer simulations;relaxing filtering;duplexing distance;spectrally-agile ca transceivers;calibration properties;transceivers;abstracts;cancellation;carrier aggregation;duplexer isolation;frequency division duplexing;intermodulation;lte-advanced;power amplifier;spurious emissions"],"search_terms":["dsp","based","suppression","spurious","emissions","band","carrier","aggregation","fdd","transceivers","kiayani","abdelaziz","anttila","lehtinen","valkama"],"title":"DSP-based suppression of spurious emissions at RX band in carrier aggregation FDD transceivers","year":2014}