Abstract: The invention provides a selection circuit and method of multiple input/output ports and antenna sub-arrays for reconfigurable hybrid beamforming. The selection circuit includes a plurality of digital signal processing modules, each electrically connected to a respective input/output port, a plurality of analog front end (AFE) and radio frequency (RF) chains, each electrically connected to a respective digital signal processing module, a plurality of multiplexing circuits, each electrically connected to any number of the AFE and RF chains, and a plurality of antenna sub-arrays, each electrically connected to a respective multiplexing circuit, wherein the multiplexing circuits set any number of the antenna sub-arrays to transmit/receive any number of electrical signals of input/output ports transmitted by the AFE and RF chains.

Abstract: A cooperative transmission system and a cooperative transmission method used in multiple access points in a wireless local network are provided. The cooperative transmission system includes a plurality of access points, a clustering controller and at least one cluster controller. Each of the access points serves at least one user device within a serving range of the access point. The clustering controller clusters the access points into a plurality of clusters according to locations of the access points and the serving range. The at least one cluster controller controls cooperative synchronous downlink transmissions among all the access points within a cluster governed by the cluster controller, and the clusters, when intersecting with one another, employ an interference suppression mechanism to eliminate interference generated by the user devices or neighboring access points located in different clusters.

Abstract: An access point (AP) and a communication system are provided. The access point comprises at least but not limited to a transceiver, a network connection unit, and a processing circuit. The processing circuit is configured for the following steps. The AP receives channel access requests of the user equipments (UEs) from the UEs. Next, the AP transmits a channel request data according to QoS requirements of plurality of channel access requests of the UEs to the server. Afterward, the AP receives resource allocation information associated with the channel request data from the server, wherein the resource allocation information comprises an allocated result of physical channels and transmission power configurations. Subsequently, the AP allocates the physical channels to the UEs according to the QoS requirements of the channel access requests of the UEs and the resource allocation information.

Abstract: The invention provides a selection circuit and method of multiple input/output ports and antenna sub-arrays for reconfigurable hybrid beamforming. The selection circuit includes a plurality of digital signal processing modules, each electrically connected to a respective input/output port, a plurality of analog front end (AFE) and radio frequency (RF) chains, each electrically connected to a respective digital signal processing module, a plurality of multiplexing circuits, each electrically connected to any number of the AFE and RF chains, and a plurality of antenna sub-arrays, each electrically connected to a respective multiplexing circuit, wherein the multiplexing circuits set any number of the antenna sub-arrays to transmit/receive any number of electrical signals of input/output ports transmitted by the AFE and RF chains.

Abstract: A cooperative transmission system and a cooperative transmission method used in multiple access points in a wireless local network are provided. The cooperative transmission system includes a plurality of access points, a clustering controller and at least one cluster controller. Each of the access points serves at least one user device within a serving range of the access point. The clustering controller clusters the access points into a plurality of clusters according to locations of the access points and the serving range. The at least one cluster controller controls cooperative synchronous downlink transmissions among all the access points within a cluster governed by the cluster controller, and the clusters, when intersecting with one another, employ an interference suppression mechanism to eliminate interference generated by the user devices or neighboring access points located in different clusters.

Abstract: In a method and system for generating twelve-lead ECG signals based on three differential voltages, each of which is defined as a potential difference between two myoelectric signals sensed respectively by two corresponding electrodes that cooperatively constitute a corresponding differential electrode pair and that are disposed on a user's chest at predetermined specific locations, a signal processor generates the twelve-lead ECG signals using a pre-established dynamic system model that is associated with the specific locations of the electrodes on the user's chest and that is configured with temporal and spatial correlations among twelve leads of an ECG.

Abstract: The server receives location data of the access points (APs) and channel request data of the APs corresponding to the location data of the APs. The server groups the channel request data of the APs into clusters according to available physical channels of the APs and the channel request data of the APs. The server allocates the available physical channels of the APs for the channel request data of the APs and transmission power configurations on each of the allocated physical channels of the APs according to the channel request data and the location data of the APs in each of the clusters. The server transmits allocated results of the allocated physical channels of the APs for the channel request data of the APs and the transmission power configurations on each of the allocated physical channels of the APs.

Abstract: In a method and system for generating twelve-lead ECG signals based on three differential voltages, each of which is defined as a potential difference between two myoelectric signals sensed respectively by two corresponding electrodes that cooperatively constitute a corresponding differential electrode pair and that are disposed on a user's chest at predetermined specific locations, a signal processor generates the twelve-lead ECG signals using a pre-established dynamic system model that is associated with the specific locations of the electrodes on the user's chest and that is configured with temporal and spatial correlations among twelve leads of an ECG.

Abstract: A radio system is provided. The radio system comprises primary devices, secondary devices, cognitive radio base stations and a data fusion center. The primary devices are licensed to use communication channels. The secondary devices acquire sensing reports of received signal strength, location and channel information of the primary devices. The cognitive radio base stations receive the sensing reports generated by the secondary devices through a control channel. The data fusion center receives the sensing reports from the cognitive radio base stations through a backbone network and performs a cooperative spectrum sensing process on the sensing reports to obtain primary device information with respect to the number, spectrum distribution and coverage area of the primary devices, wherein the primary device information is accessible by the secondary devices such that the secondary devices select one of the communication channels according to the primary device information to perform communications.

Abstract: A resource allocation server and a communication system are provided. The server receives location data of the access points (APs) and channel request data of the APs corresponding to the location data of the APs. The server groups the channel request data of the APs into clusters according to available physical channels of the APs and the channel request data of the APs. The server allocates the available physical channels of the APs for the channel request data of the APs and transmission power configurations on each of the allocated physical channels of the APs according to the channel request data and the location data of the APs in each of the clusters. The server transmits allocated results of the allocated physical channels of the APs for the channel request data of the APs and the transmission power configurations on each of the allocated physical channels of the APs.

Abstract: An access point (AP) and a communication system are provided. The access point comprises at least but not limited to a transceiver, a network connection unit, and a processing circuit. The processing circuit is configured for the following steps. The AP receives channel access requests of the user equipments (UEs) from the UEs. Next, the AP transmits a channel request data according to QoS requirements of plurality of channel access requests of the UEs to the server. Afterward, the AP receives resource allocation information associated with the channel request data from the server, wherein the resource allocation information comprises an allocated result of physical channels and transmission power configurations. Subsequently, the AP allocates the physical channels to the UEs according to the QoS requirements of the channel access requests of the UEs and the resource allocation information.

Abstract: A cognitive radio communication network is provided. The cognitive radio communication network includes a cloud and a wireless communication network. A communication system accessing to a backbone network is provided. The communication system includes a cloud and a wireless communication network connected to the cloud, and having a plurality of cognitive radio access points and a plurality of users, wherein the cloud performs the functions of network management, power control, and radio resource management.

Abstract: In a cooperative spectrum sensing method and system for locationing primary transmitters, each of secondary users transmits to a corresponding one of cognitive radio (CR) base station location information thereof and a received signal strength indicator (RSSI) value generated thereby in response to sensing power signals from the primary transmitters. The CR base stations transmit the location information and the RDDI values of the secondary users to a data fusion center such that the data fusion center obtains the number and locations of the primary transmitters based on the location information and the RSSI values received thereby using a learning algorithm to thereby reconstruct a power propagation map of the primary transmitters.

Abstract: A cognitive radio communication network is provided. The cognitive radio communication network includes a cloud and a wireless communication network. A communication system accessing to a backbone network is provided. The communication system includes a cloud and a wireless communication network connected to the cloud, and having a plurality of cognitive radio access points and a plurality of users, wherein the cloud performs the functions of network management, power control, and radio resource management.

Abstract: A radio system is provided. The radio system comprises primary devices, secondary devices, cognitive radio base stations and a data fusion center. The primary devices are licensed to use communication channels. The secondary devices acquire sensing reports of received signal strength, location and channel information of the primary devices. The cognitive radio base stations receive the sensing reports generated by the secondary devices through a control channel. The data fusion center receives the sensing reports from the cognitive radio base stations through a backbone network and performs a cooperative spectrum sensing process on the sensing reports to obtain primary device information with respect to the number, spectrum distribution and coverage area of the primary devices, wherein the primary device information is accessible by the secondary devices such that the secondary devices select one of the communication channels according to the primary device information to perform communications.

Abstract: In a cooperative spectrum sensing method and system for locationing primary transmitters, each of secondary users transmits to a corresponding one of cognitive radio (CR) base station location information thereof and a received signal strength indicator (RSSI) value generated thereby in response to sensing power signals from the primary transmitters. The CR base stations transmit the location information and the RDDI values of the secondary users to a data fusion center such that the data fusion center obtains the number and locations of the primary transmitters based on the location information and the RSSI values received thereby using a learning algorithm to thereby reconstruct a power propagation map of the primary transmitters.

Abstract: A wireless transceiving apparatus is adapted for transceiving data between communication terminals and signal processing devices and includes transceiving devices. Each transceiving device includes: a number (M) of antenna units each including a number (T) of antenna elements; a number (M) of first processing unit for performing radio frequency (RF) beamforming; a number (M) of frequency converters; and a second processing unit for performing baseband beamforming. The wireless transceiving apparatus receives signals from the communication terminals and transmits processed signals to the communication terminals with an improved signal to interference plus noise ratio (SINR), thereby ensuring the quality of service for each communication terminal.

Abstract: The present invention propose a driving apparatus for an image processing system. A DC motor with a feedback controlling system is utilized as the driving apparatus. With the design of the present invention, the accuracy of the position control can be increased and the prior art problem of missing steps and unequalled steps can be eliminated. The driving apparatus of the present invention includes a DC motor, a position detecting device, an error counter, a controlling circuit, and a driving circuit. The position detecting device is employed for detecting positions of the DC motor in order to generate feedback signals. The error counter is responsive to input signals and the feedback signals for generating error signals. The controlling circuit is responsive to the error signals for controlling the DC motor. The driving circuit is responsive to the controlling circuit for driving the DC motor.