Abstract: A chassis structure includes a chassis body and at least one holder module. The at least one holder module includes a frame, a handle, and a guiding assembly. The frame is detachably disposed in the chassis body and has a first linking portion. The handle has a holding portion, a second linking portion, and a third linking portion pivoted to the frame. The guiding assembly is disposed on the chassis body and has a first guiding slot, a second guiding slot, and a third guiding slot. The first guiding slot has a first segment, and the second guiding slot has a second segment and a third segment curvedly connected to each other. The first linking portion, the second linking portion, and the third linking portion are adapted to respectively move along the first segment, the third segment, and the third guiding slot simultaneously such that the frame moves upwards and rotates from a first position to a second position simultaneously.

Abstract: A wide-angle lens calibration system is provided, which may include a rotation unit, an image input unit, and a processing unit. A lens to be calibrated may be disposed on the rotation unit; the rotation direction of the rotation unit may be parallel to the horizontal direction; the optical axis center of the lens may be aligned with a reference object. The image input unit may receive images from the lens. The processing unit may control the rotation unit to rotate and analysis the images received from the lens. The processing unit may execute a distortion calibration process, wherein the processing unit may continuously rotate the rotation unit by a predetermined angle and then record the distance between the position of the reference object in the image and the optical axis center and a total rotation angle after each rotation so as to establish a distortion calibration model.

Abstract: A wide-angle lens calibration system is provided, which may include a rotation unit, an image input unit, and a processing unit. A lens to be calibrated may be disposed on the rotation unit; the rotation direction of the rotation unit may be parallel to the horizontal direction; the optical axis center of the lens may be aligned with a reference object. The image input unit may receive images from the lens. The processing unit may control the rotation unit to rotate and analysis the images received from the lens. The processing unit may execute a distortion calibration process, wherein the processing unit may continuously rotate the rotation unit by a predetermined angle and then record the distance between the position of the reference object in the image and the optical axis center and a total rotation angle after each rotation so as to establish a distortion calibration model.

Abstract: A fail recovery method and an Internet of Things (IoT) system and a charging system using the same are provided. The fail recovery method includes following steps: providing a plurality of gateway devices, in which at least one of the gateway devices preset to provide a wireless network service to at least one IoT device and at least another one of the gateway devices preset to provide the wireless network service to at least one user device; mutual confirming an operation state of other one of gateway devices by the gateway devices; and when the one of the gateway devices is determined as failed, using the another one of the gateway devices to replace the failed gateway device, so as to simultaneously provide the wireless network service to the IoT device and the user device by the another one of the gateway devices.

Abstract: A communication unit comprises a radio frequency, RF, transmitter comprising: a power amplifier, PA, module; an envelope tracking system operably coupled to the PA module and arranged to variably control a supply voltage for the PA module; and a load control system operably coupled to an output of the PA module and arranged to control a power amplifier output load.

Abstract: A gain asymmetry characterizing circuit for determining characteristics of gain asymmetry possessed by a transmitter includes a baseband loopback path, a test signal generating unit and a gain asymmetry measuring unit. The baseband loopback path is coupled to a baseband node on a first transmission path of the transmitter. The test signal generating unit is arranged to generate a first differential baseband test signal pair to the first transmission path. The first differential baseband test signal pair includes a first baseband signal and a second baseband signal. During a first period, the first baseband signal and the second baseband signal are fed into a positive input node and a negative input node of the first transmission path, respectively. During a second period, the second baseband signal and the first baseband signal are fed into the positive input node and the negative input node of the first transmission path, respectively.

Abstract: An electronic element supporting base and an electronic device applying the same are provided. The electronic element supporting base comprises a fixing portion and a carrying part. The fixing portion is suitable for being fixed to a frame of the electronic device as a fulcrum for the electronic element supporting base. The carrying part is suitable for carrying a plurality of electronic elements, wherein a gap exists between the carrying part and the frame, and a gap exists between the carrying part and the circuit board. When the electronic device receives an impact, the suspended design of the electronic element supporting base allows the carrying part to oscillate through the gaps, and the electronic element supporting base will not be squeezed, which prevents the electronic elements on the electronic element supporting base from being shifted.

Abstract: An image conversion method is provided. An image of a calibration reference pattern is captured. A plurality of first and a plurality of second characteristic patterns of the calibration reference pattern are identified. Coordinates of the first and second characteristic patterns in a first view angle coordinate system are obtained, and coordinates of the first and second characteristic patterns in a second view angle coordinate system are obtained, to obtain a coordinate conversion relationship between the first and second view angle coordinate systems. An input image is converted to an output image according to the coordinate conversion relationship.

Abstract: A touch module, adapted for an electronic apparatus and including a cover, a touch sensor layer, a flexible printed circuit board (FPC), a light-emitting element and a light guide film is provided. The cover has at least one transparent icon. The touch sensor layer and the FPC are disposed under the cover, and the FPC is electrically connected to the touch sensor layer. The light-emitting element is mounted on the FPC, wherein the FPC is located between the cover and the light-emitting element. The light guide film is disposed under the cover, wherein the touch sensor layer is located between the cover and the light guide film. Light emitted by the light-emitting element is transmitted to the transparent icon through the light guide film. In addition, an electronic apparatus is also provided.

Abstract: An electronic element supporting base and an electronic device applying the same are provided. The electronic element supporting base comprises a fixing portion and a carrying part. The fixing portion is suitable for being fixed to a frame of the electronic device as a fulcrum for the electronic element supporting base. The carrying part is suitable for carrying a plurality of electronic elements, wherein a gap exists between the carrying part and the frame, and a gap exists between the carrying part and the circuit board. When the electronic device receives an impact, the suspended design of the electronic element supporting base allows the carrying part to oscillate through the gaps, and the electronic element supporting base will not be squeezed, which prevents the electronic elements on the electronic element supporting base from being shifted.

Abstract: A communication unit comprises a radio frequency, RF, transmitter comprising: a power amplifier, PA, module; an envelope tracking system operably coupled to the PA module and arranged to variably control a supply voltage for the PA module; and a load control system operably coupled to an output of the PA module and arranged to control a power amplifier output load.

Abstract: A communication unit comprises a radio frequency, RF, transmitter comprising: a power amplifier, PA, module; an envelope tracking system operably coupled to the PA module and arranged to variably control a supply voltage for the PA module; and a load control system operably coupled to an output of the PA module and arranged to control a power amplifier output load.

Abstract: A wireless communications circuit includes: a transceiver; a power amplifier module including a plurality of power amplifiers coupled to the transceiver; a filter module, including a plurality of filters coupled to the power amplifier module; an antenna switching module coupled between the filter module and an antenna; a tunable matching network coupled between the antenna and the antenna switching module; and a baseband circuit coupled to the tunable matching network. The baseband circuit is used for generating a control signal to the tunable matching network to adjust an impedance of the tunable matching network, wherein the impedance of the tunable matching network is adjusted to be different values under different operating conditions of the wireless communications circuit.

Abstract: A gain asymmetry characterizing circuit for determining characteristics of gain asymmetry possessed by a transmitter includes a baseband loopback path, a test signal generating unit and a gain asymmetry measuring unit. The baseband loopback path is coupled to a baseband node on a first transmission path of the transmitter. The test signal generating unit is arranged to generate a first differential baseband test signal pair to the first transmission path. The first differential baseband test signal pair includes a first baseband signal and a second baseband signal. During a first period, the first baseband signal and the second baseband signal are fed into a positive input node and a negative input node of the first transmission path, respectively. During a second period, the second baseband signal and the first baseband signal are fed into the positive input node and the negative input node of the first transmission path, respectively.

Abstract: A wireless communications circuit includes: a transceiver; a power amplifier module including a plurality of power amplifiers coupled to the transceiver; a filter module, including a plurality of filters coupled to the power amplifier module; an antenna switching module coupled between the filter module and an antenna; a tunable matching network coupled between the antenna and the antenna switching module; and a baseband circuit coupled to the tunable matching network. The baseband circuit is used for generating a control signal to the tunable matching network to adjust an impedance of the tunable matching network, wherein the impedance of the tunable matching network is adjusted to be different values under different operating conditions of the wireless communications circuit.

Abstract: A touch module, adapted for an electronic apparatus and including a cover, a touch sensor layer, a flexible printed circuit board (FPC), a light-emitting element and a light guide film is provided. The cover has at least one transparent icon. The touch sensor layer and the FPC are disposed under the cover, and the FPC is electrically connected to the touch sensor layer. The light-emitting element is mounted on the FPC, wherein the FPC is located between the cover and the light-emitting element. The light guide film is disposed under the cover, wherein the touch sensor layer is located between the cover and the light guide film. Light emitted by the light-emitting element is transmitted to the transparent icon through the light guide film. In addition, an electronic apparatus is also provided.

Abstract: An image conversion method is provided. An image of a calibration reference pattern is captured. A plurality of first and a plurality of second characteristic patterns of the calibration reference pattern are identified. Coordinates of the first and second characteristic patterns in a first view angle coordinate system are obtained, and coordinates of the first and second characteristic patterns in a second view angle coordinate system are obtained, to obtain a coordinate conversion relationship between the first and second view angle coordinate systems. An input image is converted to an output image according to the coordinate conversion relationship.

Abstract: A superimposed network coding method, that is applicable to communication in a network, containing a first, a second, and a third network nodes, comprising following steps: firstly, the first network node transmits its first data to the second, and the third network nodes, so that the second and the third network nodes receive corresponding signals; next, the second network node transmits its second data to the first and the third network nodes, so that the first and the third network nodes receive the corresponding signal; then, the third network node superimposes and sums signals received with summation weights to generate a superimposed signal, and transmits it to the first and the second network nodes; finally, the first and the second network nodes delete their own data from signals received, and then demodulate the signals received to obtain the second data and the first data.

Abstract: A cross-layer rate adaptation mechanism for wireless local area network (WLAN) can obtain the channel state by calculating the Eb/N0 ratio of ACK frame transmitted from the receiver side. The mechanism determines the transmission rate of the next frame by referring to a predefined reduced mode table. When receiving an ACK frame fails, the mechanism can automatically lower the transmitting rate of the next transmission. Therefore, the method can reduce the damage to the system when ACK frame failure happens.

Abstract: A cross-layer rate adaptation mechanism for wireless local area network (WLAN) can obtain the channel state by calculating the Eb/N0 ratio of ACK frame transmitted from the receiver side. The mechanism determines the transmission rate of the next frame by referring to a predefined reduced mode table. When receiving an ACK frame fails, the mechanism can automatically lower the transmitting rate of the next transmission. Therefore, the method can reduce the damage to the system when ACK frame failure happens.