Patent ID: 9065508
Filing Date: 2015-06-23
Classification: H04B

Abstract:
1. A method for cancelling, from signals received by a radio device in a first frequency band, interference generated by the radio device in the first frequency band when the radio device transmits simultaneously radio signals on at least a second frequency band, different from the first frequency band, the method comprising the following steps which cause the device to: convert digital signals to be transmitted to analog signals to be transmitted in the second frequency band, execute a first processing of the analog signals to be transmitted in the second frequency band, the first processing generating interference signals in the first frequency band due to non-linearity of the first processing, execute a second processing at least on the interference signals generated in the first frequency band, sense the interference signals in the first frequency band and convert the sensed interference in the first frequency band into digital samples of the interference, apply to the digital signals to be transmitted a mathematical model that mimics the non-linearity of the first processing, perform an adaptive filtering in order to provide digital samples for correction, wherein the adaptive filtering mimics the second processing and uses the digital samples of the interference and the digital samples on which the mathematical model is applied, convert received analog signals in the first frequency band into digital received signals, and cancel from the digital received signals the interference using the digital samples for correction.