Abstract: There is provided a wearable device for listening to sound comprising two in-ear earbuds capable of reproducing sound, where said two in-ear earbuds are attached to each other with a cord, said cord comprising cable parts with leads for powering the device and for transmitting signals, the length of said cord being adapted to reach around the back of the neck of a user of the device, said device having a wireless connection unit, where the wireless connection unit is capable of receiving a wireless digital signal and provide a wire bound signal to the two in-ear earbuds for reproducing sound in the earbuds, said device having a battery and a charging interface for connecting a charging cable for charging the battery, characterized in that said charging interface is located on the cord.

Abstract: An IQ-imbalance of a complex receiver can be corrected by compensating the in-phase signal component and the quadrature-phase signal component produced by the complex receiver for an IQ-imbalance estimated by analyzing the in-phase signal component and the quadrature-phase signal component. A carrier signal can be received at the complex receiver. An in-phase signal component and a quadrature-phase signal component can be generated from the carrier signal. The generated in-phase signal component and the generated quadrature-phase signal component can be analyzed to estimate an IQ-imbalance. Based on the estimated IQ-imbalance, the in-phase signal component and quadrature-phase signal component can be compensated to correct the IQ-imbalance.

Abstract: An IQ-imbalance of a complex receiver can be corrected by compensating the in-phase signal component and the quadrature-phase signal component produced by the complex receiver for an IQ-imbalance estimated by analyzing the in-phase signal component and the quadrature-phase signal component. A carrier signal can be received at the complex receiver. An in-phase signal component and a quadrature-phase signal component can be generated from the carrier signal. The generated in-phase signal component and the generated quadrature-phase signal component can be analyzed to estimate an IQ-imbalance. Based on the estimated IQ-imbalance, the in-phase signal component and quadrature-phase signal component can be compensated to correct the IQ-imbalance.