Industrial Technology Research Institute

Acer Inc.

Ping-Heng Kuo

Pang-An Ting

Hsiang-Tsung Kung

Li-Chung Lo

Chia-Pang Yen

Sung-En Chiu

A communication device of reporting channel information comprises a storage unit for storing instructions and a processing means coupled to the storage unit. The processing means is configured to execute the instructions stored in the storage unit. The instructions comprise receiving a plurality of beamformed reference signals transmitted by a network via a plurality of beams, respectively; obtaining a plurality of channel quality indicators (CQIs) of the plurality of beams according to the plurality of beamformed reference signals; and transmitting a bitmap indicating whether the plurality of CQIs are greater than a threshold to the network.

Device and method of reporting channel information according to beamforming

A communication device for reporting control information comprises a storage unit for storing instructions and a processing means coupled to the storage unit. The processing means is configured to execute the instructions stored in the storage unit. The instructions comprise receiving a first period for transmitting analog beamforming information from a network; and receiving a second period for transmitting baseband precoder information from the network, wherein the first period is different from the second period.

Device of reporting control information

A method of handling multiuser channel quality indicators (MU-CQIs) for a communication device comprises transmitting a highest MU-CQI periodically to a network; and transmitting at least one MU-CQI aperiodically to the network according to a request transmitted by the network.

Method of handling multiuser CQI for MU-MIMO and related communication device

A communication device for reporting control information comprises a storage unit for storing instructions and a processing means coupled to the storage unit. The processing means is configured to execute the instructions stored in the storage unit. The instructions comprise receiving a first period for transmitting first antenna array dimension precoding information from a network; and receiving a second period for transmitting second antenna array dimension precoding information from the network, wherein the first period is different from the second period.

A network for handling parameter configurations comprises a processing means to execute instructions. The instructions comprise determining a subset of parameter configurations; transmitting information of the subset of parameter configurations to a communication device via a higher layer signaling; selecting at least one parameter configuration from the subset of parameter configurations, wherein the at least one parameter configuration corresponds to at least one communication device, respectively; transmitting information of the at least one parameter configuration to the communication device via a physical layer signaling; transmitting a signal to the communication device via a resource according to a transmission scheme and a parameter configuration of the communication device; and transmitting at least one signal to the at least one communication device via the resource according to the transmission scheme and the at least one parameter configuration.

Device and method of handling parameter configurations

The disclosure provides a method of transmitting and receiving channel state information reference signal (CSI-RS) and related apparatuses using the same method. According to one of the exemplary embodiments, the proposed method would include not limited to mapping a CSI-RS into a plurality of beams which comprises a first beam group and a second beam group, wherein each of a first plurality of beams of the first beam group is transmitted toward a different direction from each of a second plurality of beams of the second beam group; and transmitting the first beam group and the second beam group; and receiving a channel state information (CSI) which correspond to a beam of the first beam group or a beam of the second beam group.

Method of transmitting and receiving CSI-RS and related apparatuses using the same

A communication station includes a transceiving circuit, a radio signal distribution circuit and a control circuit. The radio signal distribution circuit configures an antenna array to communication with a communication device with a first antenna port formation pattern (APFP) and a second APFP based on an elevation beamforming technique. The control circuit configures the transceiving circuit to generate a first reference signal and a second reference signal, and configures the radio signal distribution circuit to configure the antenna array to transmit the first reference signal and the second reference signal respectively with the first APFP and the second APFP to the communication device. The control circuit further configures the transceiving circuit to receive the first channel state information and the second channel state information respectively corresponding to the first reference signal and the second reference signal through the radio signal distribution circuit.

Communication station with elevation beamforming and related communication device

A method of handling a beamforming feedback for a base station of the wireless communication system comprises receiving a message comprising information of an interference caused by a communication between the base station and a communication device of the wireless communication system; determining an accuracy level of channel information according to the information of the interference; controlling the communication device to transmit the channel information with the accuracy level to the base station; and performing a beamforming according to the channel information to communicate with the communication device, after receiving the channel information transmitted by the communication device.

Method of handling beamforming feedback in a wireless communication system and related communication device

An antenna modulation method applicable to a transmitter comprising a processing unit which is configured to execute functions including at least but not limited to receiving a symbol represented by a bit stream; converting the bit stream into a coordinate point of a signal constellation comprising a horizontal-axis component and a vertical-axis component; converting, from the horizontal-axis component of the coordinate point, a first vector having at least a first entry and a second entry; converting, from the vertical-axis component of the coordinate point, a second vector having at least a third entry and a fourth entry; generating a third vector having at least a fifth entry and a sixth entry by summing the first vector and the second vector; and activating at least one of the first antenna and the second antennas based on one or more non-zero entries of the third vector.

Antenna modulation method applicable to wireless transmitter and transmitter using the same

The present disclosure proposes a channel quality indicator (CQI) feedback method applicable to a user equipment (UE) using the same method. According to one of the exemplary embodiments, the channel quality indicator (CQI) feedback method would be applicable to a user equipment (UE) and would include steps of at least but not limited to receiving a N&#xd7;L precoding matrix having N rows and L columns with each of the N rows corresponding to an antenna port and each of the L columns corresponding to a user, wherein N and L are both integers greater than one, performing a channel quality indicator (CQI) calculation for K of the L columns, where 0&#x3c;K&#x2266;L, and K is an integer, determining from the CQI calculation for K of the L columns a preferred column, and transmitting information corresponding to the preferred column.

User equipment having channel quality indicator feedback mechanism

A channel information feedback method for multi-antenna system, and a wireless communication device using the same method are provided. The proposed method could reduce feedback overhead for multiple-input multiple-output (MIMO) wireless channel information, and is based on compressive sensing technique. Prior to sending back channel information, a receiver estimates the channel and multiplies the vectorized channel with a random matrix to generate compressed feedback content. Upon receiving the compressed feedback content at a transmitter, the channel information could be restored with signal recovery algorithms of compressive sensing technique. In the other embodiment, the proposed method further adaptively adjusts compression ratio of the compressed feedback content in accordance to the prevailing channel quality. Further, for slow-varying MIMO channels, there is proposed another channel information feedback method which switches between a fixed sparcifying-basis and a signal-dependent sparcifying-basis.

Channel information feedback method and wireless communication device using the same

A method of handling channel state information (CSI) reports for a communication device in a wireless communication system comprises determining at least one field difference between a reference CSI report and at least one CSI report; transmitting the reference CSI report to a network of the wireless communication system; and transmitting the at least one field difference to the network, to transmit the at least one CSI report to the network, respectively; wherein the at least one CSI report corresponds to at least one component carrier, respectively, corresponds to at least one transmission point in the network, respectively, or corresponds to at least one coordinated multipoint (CoMP) configuration, respectively.

Method of handling CSI report and related communication device

A method of enhancing performance of downlink multi-user multiple-input-multiple-output transmissions in a wireless communication system comprising a communication device and a network is disclosed. The method comprises generating a feedback report comprising a correlation-based validity threshold (CVT); and transmitting the feedback report from the communication device to the network.

Method and apparatus of enhancing performance of downlink multi-user multiple-input-multiple-output transmissions in wireless communication system

A method for data transmission using spatial-domain modulation, and a transmitter using the same has been proposed. The method comprises the following steps including at least but not limited to receiving a plurality of symbols to be transmitted, mapping the symbols as L-dimensional coordinate, wherein 1&#x3c;L&#x3c;N, dividing the antennas into L non-overlapping antenna groups, choosing one activating antenna from the antennas in each of the antenna groups according to the coordinate of the symbols, and transmitting modulated signal by using the activating antenna in each of the antenna groups.

Method for data modulation and transmitter using the same

Method and apparatus for generating a precoder for uplink transmission from a mobile station. The method includes receiving information corresponding to a first precoding matrix and a second precoding matrix, and generating the precoder by linearly combining the first precoding matrix and the second precoding matrix. In the method, the first precoding matrix maximizes a transmission power between the mobile station and a serving base station, and the second precoding matrix minimizes an average interference value between the mobile station and at least two neighboring base stations.

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Taipei, Taiwan

Ping-Heng Kuo