Abstract: A stereoscopic display system and a control method of the stereoscopic display system are provided. A rotation device is controlled to rotate at 2n times an image input frequency, so that the rotation device respectively completes n rotations during a period in which stereoscopic glasses receive a left-eye image and a period in which the stereoscopic glasses receive a right-eye image.

Abstract: A method for controlling an antenna array is provided, which includes following steps. Associations with a plurality of mobile devices are established, and at least one characteristic parameter table corresponding to the mobile devices is generated. When a plurality of transmission request signals are received simultaneously and the mobile devices are divided into a user group, a multi-user antenna index of the antenna array is generated based on the at least one characteristic parameter table, and a plurality of data streams corresponding to the mobile devices are transmitted simultaneously through the antenna array. When the transmission request signals are received simultaneously and the mobile devices are not divided into the user group, a single-user antenna index of the antenna array is generated based on the at least one characteristic parameter table, and the data streams corresponding to the mobile devices are transmitted one-by-one through the antenna array.

Abstract: A channel estimation system and method thereof is provided. By utilizing the nature of the millimeter-wave channel with sparse path, the channel estimation problem is transformed from estimating the entire channel matrix to estimating independent parameters of the millimeter-wave channel. These parameters are angle of arrival (AoA) and angle of departure (AoD), and complex gain of the channel paths.

Abstract: A radio frequency signal processing method for a wireless communication device, which includes an omni-directional antenna and a plurality of directional antennas, includes receiving a request signal from a first sending node with the omni-directional antenna, sending a confirming signal to the first sending node with the omni-directional antenna, receiving a data signal from the first sending node with a first directional antenna of the plurality of directional antennas according to the request signal and a result of a training packet process, transmitting an acknowledge signal to the first sending node with the first directional antenna, and receiving follow-up signals with the omni-directional antenna. The request signal is utilized to ask the wireless communication device to receive the data signal.

Abstract: A method for controlling an antenna array is provided, which includes following steps. Associations with a plurality of mobile devices are established, and at least one characteristic parameter table corresponding to the mobile devices is generated. When a plurality of transmission request signals are received simultaneously and the mobile devices are divided into a user group, a multi-user antenna index of the antenna array is generated based on the at least one characteristic parameter table, and a plurality of data streams corresponding to the mobile devices are transmitted simultaneously through the antenna array. When the transmission request signals are received simultaneously and the mobile devices are not divided into the user group, a single-user antenna index of the antenna array is generated based on the at least one characteristic parameter table, and the data streams corresponding to the mobile devices are transmitted one-by-one through the antenna array.

Abstract: A reader is provided, including a power amplifier (PA), a low-noise amplifier (LNA), a circulator, an auto-tuning matching network, and a control circuit. The PA emits a first RF transmission signal. The LNA transmits a first RF induced signal corresponding to the first RF transmission signal. The circulator is coupled between the PA and LNA, transmits the first RF transmission signal to an RF connection terminal or receives the first RF induced signal from the RF connection terminal. The auto-tuning matching network is coupled to the circulator, matches impedances between the circulator and the RF connection terminal. The control circuit is coupled to the auto-tuning matching network, adjusts the auto-tuning matching network to match impedances between the circulator and the RF connection terminal.

Abstract: A reader is provided, including a power amplifier (PA), a low-noise amplifier (LNA), a circulator, an auto-tuning matching network, and a control circuit. The PA emits a first RF transmission signal. The LNA transmits a first RF induced signal corresponding to the first RF transmission signal. The circulator is coupled between the PA and LNA, transmits the first RF transmission signal to an RF connection terminal or receives the first RF induced signal from the RF connection terminal. The auto-tuning matching network is coupled to the circulator, matches impedances between the circulator and the RF connection terminal. The control circuit is coupled to the auto-tuning matching network, adjusts the auto-tuning matching network to match impedances between the circulator and the RF connection terminal.

Abstract: A radio-frequency transceiver system adapted to a wireless local area network includes an antenna set, including a plurality of antenna units disposed toward a plurality of directions, a radio-frequency signal processing module for processing radio-frequency signals, and a switching module electrically coupled between the antenna set and the radio-frequency signal processing module for switching between different connection states of the radio-frequency signal processing module and the antenna units of the antenna set such that the radio-frequency transceiver system switches between an omnidirectional mode and a directional mode. In the omnidirectional mode, the antenna units are electrically connected to the radio-frequency signal processing module to transmit or receive radio-frequency signals omni-directionally.

Abstract: A radio frequency signal processing method for a wireless communication device, which includes an omni-directional antenna and a plurality of directional antennas, includes receiving a request signal from a first sending node with the omni-directional antenna, sending a confirming signal to the first sending node with the omni-directional antenna, receiving a data signal from the first sending node with a first directional antenna of the plurality of directional antennas according to the request signal and a result of a training packet process, transmitting an acknowledge signal to the first sending node with the first directional antenna, and receiving follow-up signals with the omni-directional antenna. The request signal is utilized to ask the wireless communication device to receive the data signal.

Abstract: An apparatus for low complexity sub-Nyquist sampling of sparse wideband signals is provided, including a mixer, a periodic random sequence generator and a filter bank. The periodic random sequence generator generates a periodic pseudo-random sequence. The mixer is connected to the periodic random sequence generator for receiving the periodic pseudo-random sequence and mixing with an input signal to obtain a modulated signal. The filter bank further includes a plurality of filters and is connected to the mixer for filtering the modulated signal. The sub-Nyquist sampling apparatus may further includes a plurality of analog-to-digital convertors (ADCs), with each ADC connected to each filter of the filter bank to sample the signal from the filter bank and output a sampling signal.

Abstract: A channel estimation method is provided. The method includes the following steps of: receiving an input symbol of an input signal and obtaining several pilot channel gains through calculation; executing an operation of interpolation on the pilot channel gains by a Wiener filter to obtain several data channel gains through calculation; calculating an adaptive alteration for the first and second multi-path statistical characteristic parameters according to the data channel gains and the pilot channel gains, and accordingly having the first and the second multi-path statistical characteristic parameters adjusted; generating an updated Wiener filter according to the adjusted first and second multi-path statistical characteristic parameters to execute an operation of channel estimation on a next input symbol of the input signal.

Abstract: A channel estimation method is provided. The method includes the following steps of: receiving an input symbol of an input signal and obtaining several pilot channel gains through calculation; executing an operation of interpolation on the pilot channel gains by a Wiener filter to obtain several data channel gains through calculation; calculating an adaptive alteration for the first and second multi-path statistical characteristic parameters according to the data channel gains and the pilot channel gains, and accordingly having the first and the second multi-path statistical characteristic parameters adjusted; generating an updated Wiener filter according to the adjusted first and second multi-path statistical characteristic parameters to execute an operation of channel estimation on a next input symbol of the input signal.

Abstract: A video system that performs TV signal decoding, deinterlacing, and de-motion-blurring for progressive scan flat panel display is introduced. The system embeds a frame buffer and a scaler for conducting format and resolution conversions for display panels of different sizes. The output of the scaler is sent to a de-motion-blur processor for reducing the blurriness due to the motion of image objects and the slow response time of flat panel display devices. The de-motion-blur processor gets the motion and noise indication signal from scaler or the pre-frame-buffer video processor. Based on the motion and noise information and the information of temporal difference, the de-motion-blur processor performs over driving for the display panel interface and improves the rising and falling response time of the flat panel display. The decoding, deinterlacing, and de-motion-blur processing share the same frame buffer controller so the entire system can be optimized in cost and performance.

Abstract: A video system that performs TV signal decoding, deinterlacing, and de-motion-blurring for progressive scan flat panel display is introduced. The system embeds a frame buffer and a scaler for conducting format and resolution conversions for display panels of different sizes. The output of the scaler is sent to a de-motion-blur processor for reducing the blurriness due to the motion of image objects and the slow response time of flat panel display devices. The de-motion-blur processor gets the motion and noise indication signal from scaler or the pre-frame-buffer video processor. Based on the motion and noise information and the information of temporal difference, the de-motion-blur processor performs over driving for the display panel interface and improves the rising and falling response time of the flat panel display. The decoding, deinterlacing, and de-motion-blur processing share the same frame buffer controller so the entire system can be optimized in cost and performance.