A method performed by a wireless device , the method comprising: determining a set of numerologies supported by the wireless device for performing multicarrier operation, the set of numerologies including at least a first numerology for operating signals on a first carrier in a first cell and a second numerology for operating signals on a second carrier in a second cell; using at least one of a common transmitter and a common receiver when using a same numerology for the first numerology and the second numerology when one of the following applies: - in accordance with determining that the first and second carriers belong to different frequency bands and that a difference between frequencies of the first and second carriers is less than or equal to a threshold, - in accordance with determining that the first and second carriers belong to a same frequency band, and - in accordance with determining that frequencies of the first and second carriers are non-adjacent and that a gap between frequencies of the first and second carriers is less than or equal to a given threshold; and using at least one of a different transmitter and a different receiver when using different numerologies for the first numerology and the second numerology when the following applies: - in accordance with determining that the first and second carriers belong to a same frequency band and that a gap between frequencies of the first and second carriers is greater than a given threshold. determining a set of numerologies supported by the wireless device for performing multicarrier operation, the set of numerologies including at least a first numerology for operating signals on a first carrier in a first cell and a second numerology for operating signals on a second carrier in a second cell; using at least one of a common transmitter and a common receiver when using a same numerology for the first numerology and the second numerology when one of the following applies: - in accordance with determining that the first and second carriers belong to different frequency bands and that a difference between frequencies of the first and second carriers is less than or equal to a threshold, - in accordance with determining that the first and second carriers belong to a same frequency band, and - in accordance with determining that frequencies of the first and second carriers are non-adjacent and that a gap between frequencies of the first and second carriers is less than or equal to a given threshold; and - in accordance with determining that the first and second carriers belong to different frequency bands and that a difference between frequencies of the first and second carriers is less than or equal to a threshold, - in accordance with determining that the first and second carriers belong to a same frequency band, and - in accordance with determining that frequencies of the first and second carriers are non-adjacent and that a gap between frequencies of the first and second carriers is less than or equal to a given threshold; and using at least one of a different transmitter and a different receiver when using different numerologies for the first numerology and the second numerology when the following applies: - in accordance with determining that the first and second carriers belong to a same frequency band and that a gap between frequencies of the first and second carriers is greater than a given threshold. - in accordance with determining that the first and second carriers belong to a same frequency band and that a gap between frequencies of the first and second carriers is greater than a given threshold. <EOS>