Abstract: A digital circuit in a baseband receiver to compensate for the IQ mismatch by aligning the amplitude of ? with {tilde over (Q)} and by aligning the phase of {tilde over (Q)} to be 90 degrees away from ?.

Abstract: An operating method of a tracking system includes the following operations: obtaining a first relative movement vector of a client device by first movement detector; obtaining scale information related to distance; calculating a first actual movement vector of the client device according to the first relative movement vector and the scale information; and fusing, by a processor of a host device, the first relative movement vector, the scale information and the first actual movement vector to generate a 3D position of the client device.

Abstract: An operating method of a tracking system includes the following operations: obtaining a first relative movement vector of a client device by first movement detector; obtaining scale information related to distance; calculating a first actual movement vector of the client device according to the first relative movement vector and the scale information; and fusing, by a processor of a host device, the first relative movement vector, the scale information and the first actual movement vector to generate a 3D position of the client device.

Abstract: One aspect of the present disclosure is related to a movement tracking method for an electronic apparatus. The movement tracking method for an electronic apparatus comprises: obtaining information of a first frame captured by a camera; obtaining (inertial measurement unit) IMU information from an IMU sensor; calculating a first blurred pixel parameter of the first frame according to the information of the first frame and the IMU information by a processor; and determining whether the first blurred pixel parameter of the first frame is smaller than a blur threshold or not by the processor; if the first blurred pixel parameter of the first frame is smaller than the blur threshold, calculating a movement data of the electronic apparatus according to the information of the first frame and the IMU information.

Abstract: A wearable communication device includes an annular shell, a processing module, a first piezoelectric unit, and a driving unit. A cavity is formed at a part of the annular shell. The processing module processes communication data. The first piezoelectric unit is disposed in the cavity. The driving unit is used to receive the communication data and drive the first piezoelectric unit according to the communication data to make the first piezoelectric unit vibrate and trigger a corresponding audio signal. The wearable communication device can be wirelessly connected to an electronic device without physical wires to improve the convenience greatly.

Abstract: A wearable communication device includes an annular shell, a processing module, a first piezoelectric unit, and a driving unit. A cavity is formed at a part of the annular shell. The processing module processes communication data. The first piezoelectric unit is disposed in the cavity. The driving unit is used to receive the communication data and drive the first piezoelectric unit according to the communication data to make the first piezoelectric unit vibrate and trigger a corresponding audio signal. The wearable communication device can be wirelessly connected to an electronic device without physical wires to improve the convenience greatly.

Abstract: A test key for checking an interconnect structure is described, including a contiguous metal line and multiple conductive plugs on the contiguous metal line, wherein one end of each plug contacts with the contiguous metal line. The other end of at least one plug is not connected to any conductor. In addition, the two ends of the contiguous metal line are connected to different voltages.

Abstract: A test key for checking an interconnect structure is described, including a contiguous metal line and multiple conductive plugs on the contiguous metal line, wherein one end of each plug contacts with the contiguous metal line. The other end of at least one plug is not connected to any conductor. In addition, the two ends of the contiguous metal line are connected to different voltages.

Abstract: A test key for checking an interconnect structure is described, including a contiguous metal line and multiple conductive plugs on the contiguous metal line, wherein one end of each plug contacts with the contiguous metal line. The other end of at least one plug is not connected to any conductor. In addition, the two ends of the contiguous metal line are connected to different voltages.

Abstract: A test key for checking an interconnect structure is described, including a contiguous metal line and multiple conductive plugs on the contiguous metal line, wherein one end of each plug contacts with the contiguous metal line. The other end of at least one plug is not connected to any conductor. In addition, the two ends of the contiguous metal line are connected to different voltages.