A near-field communication "NFC" device (110, 120; 200; 300) that operates within an NFC environment, the NFC device (110, 120; 200; 300) comprising: a transmitter module (220; 320) configured to transmit a transmission signal (111, 121) to the NFC environment, the transmitter module (220; 320) including an amplifier configured to amplify the transmission signal (111, 121); a receiver module (240; 340) configured to receive a received signal from the NFC environment, the receiver module (240; 340) including: a signal detection module configured to detect the received signal; a decoder module configured to decode the received signal and including an analog-to-digital converter; and a gain adjustment module (112; 250; 350; 400) configured to measure the received signal, to analyze (530, 550) the measurement, and to adjust (540, 560) a component of the amplifier, the signal detection module, or the decoder module based on the analysis, wherein: the gain adjustment module (112; 250; 350; 400) is further configured to measure the received signal output from the analog-to-digital converter (394i, 394q), the signal detection module is configured to output the received signal to the decoder module as a quadrature signal having an in-phase component and a quadrature component, the analog-to-digital converter includes a first analog-to-digital converter configured to convert and to output the in-phase component of the received signal and a second analog-to-digital converter configured to convert and to output the quadrature component of the received signal, characterized in that the gain adjustment module (112; 250; 350; 400) is configured to individually measure and analyze (530, 550) the in-phase component output from the first analog-to-digital converter and the quadrature component output from the second analog-to-digital converter. a transmitter module (220; 320) configured to transmit a transmission signal (111, 121) to the NFC environment, the transmitter module (220; 320) including an amplifier configured to amplify the transmission signal (111, 121); a receiver module (240; 340) configured to receive a received signal from the NFC environment, the receiver module (240; 340) including: a signal detection module configured to detect the received signal; a decoder module configured to decode the received signal and including an analog-to-digital converter; and a signal detection module configured to detect the received signal; a decoder module configured to decode the received signal and including an analog-to-digital converter; and a gain adjustment module (112; 250; 350; 400) configured to measure the received signal, to analyze (530, 550) the measurement, and to adjust (540, 560) a component of the amplifier, the signal detection module, or the decoder module based on the analysis, wherein: the gain adjustment module (112; 250; 350; 400) is further configured to measure the received signal output from the analog-to-digital converter (394i, 394q), the signal detection module is configured to output the received signal to the decoder module as a quadrature signal having an in-phase component and a quadrature component, the analog-to-digital converter includes a first analog-to-digital converter configured to convert and to output the in-phase component of the received signal and a second analog-to-digital converter configured to convert and to output the quadrature component of the received signal, characterized in that the gain adjustment module (112; 250; 350; 400) is configured to individually measure and analyze (530, 550) the in-phase component output from the first analog-to-digital converter and the quadrature component output from the second analog-to-digital converter. the gain adjustment module (112; 250; 350; 400) is further configured to measure the received signal output from the analog-to-digital converter (394i, 394q), the signal detection module is configured to output the received signal to the decoder module as a quadrature signal having an in-phase component and a quadrature component, the analog-to-digital converter includes a first analog-to-digital converter configured to convert and to output the in-phase component of the received signal and a second analog-to-digital converter configured to convert and to output the quadrature component of the received signal, characterized in that the gain adjustment module (112; 250; 350; 400) is configured to individually measure and analyze (530, 550) the in-phase component output from the first analog-to-digital converter and the quadrature component output from the second analog-to-digital converter.