Realtek Semiconductor Inc.

Other

Acer Inc.

National Yang Ming Chiao Tung University

Chunghwa Picture Tubes, Ltd.

National Science Council

Wei-Chi Lai

Wei-Hsuan Chang

Yu-Nan Lin

Terng-Yin Hsu

Shen-Chung Lee

Chung-Yao Chang

Jian-Shihn Tsang

Jan-Dar Guo

Chun-Yen Chang

Chien-Jung Huang

Shau-Yu Cheng

Shih-Hsiung Chan

Chao-Hung Hsu

Simon M Sze

Shih-Hciung Chan

Ying-Liang Chen

Cheng-Yuan Lee

A wireless communication device includes a processor, a baseband signal processing circuit and a wireless transceiver circuit. The processor determines a transmission need, determines a transmission rate according to the transmission need and a channel condition, and provides data and information regarding the transmission rate to the baseband signal processing circuit. The information regarding the transmission rate includes at least one of a selected transmission standard, a selected physical layer data transmission rate and a selected modulation and coding scheme. The baseband signal processing circuit is coupled to the processor and processes the data according to the information regarding the transmission rate to accordingly generate a packet. The wireless transceiver circuit is coupled to the baseband signal processing circuit and transmits the packet.

Wireless communication device and method for determining data transmission rate

A communication device includes a radio transceiver and a collision detection device. The radio transceiver is configured to receive a wireless signal which includes an acknowledgment packet from a wireless communication channel. The acknowledgment packet includes acknowledgment information which corresponds to a plurality of transmitted packets. The collision detection device is coupled to the radio transceiver and configured to receive the acknowledgment packet, determine whether collision has occurred in the wireless communication channel according to the acknowledgment information corresponding to the transmitted packets and accordingly generate a detection result. The collision detection device determines whether collision has occurred according to a distribution of the acknowledgment information having a predetermined acknowledgment status. When the collision detection device determines that the acknowledgment information having the predetermined acknowledgment status is concentrated in a section of the acknowledgment packet, the detection result indicates that collision has occurred.

Communication device and collision detection method

A communication device includes a packet detection circuit, a decoding circuit and a threshold decision circuit. The packet detection circuit is arranged to perform packet detection according to at least one threshold to determine whether a packet is included in a received signal. The decoding circuit is arranged to decode the packet when packet detection circuit determines that the packet is included in the received signal, and determine whether the packet is a predetermined packet. The threshold decision circuit is arranged to calculate a number of the predetermined packet received within a time period and adjust the at least one threshold according to the number of the predetermined packet.

Communication device and method for dynamically adjusting packet detection threshold

This invention discloses a method for controlling a wireless communication device to reduce the number of retry times of data packets during transmission. The method includes steps of: using a first packet length to generate and transmit data packets; counting retry times of data packets in a predetermined time period and generating a result accordingly; and using a second packet length smaller than said first packet length to generate and transmit data packets when said result is greater than a predetermined value.

Wireless communication device and method of controlling same

A method and apparatus for performing dynamic statistical period adjustment regarding rate adaption (RA) are provided. The method includes: collecting respective transmission results of multiple data packets to perform parallel processing, where the parallel processing includes statistical period control and RA control. The statistical period control includes: determining whether a first loop index reaches a monitored period threshold; performing first transmitting (TX) information statistics; calculating variance of TX information statistics results; and selectively adjusting a statistical period threshold. The RA control includes: determining whether a second loop index reaches the statistical period threshold; performing second TX information statistics; and performing the RA. The statistical period control may dynamically adjust the statistical period of the RA control, to enhance transmission efficiency of the wireless communications device.

Method and apparatus for performing dynamic statistical period adjustment regarding rate adaption

This invention discloses a method for controlling a wireless communication device to transmit data packets. The method includes steps of: transmitting data packets; counting retry times of data packets in a predetermined time period and generating a result accordingly; comparing said result with a predetermined value and generating a comparison result accordingly; and reducing transmission time of data packets according to said comparison result.

Disclosure is related to a reconfigurable sorter and a method of sorting using the sorter. The reconfigurable sorting method is adapted to the sorter essentially consisting of multiple serially-connected comparison units. The each comparison unit includes two registers. The sorter is particularly a reconfigurable device according to the number of sorted numerals. According to the exemplary embodiment, an input mode is initiated firstly. Initial values are set to the registers. The numerals are sequentially inputted to the registers. At the input mode, the values in the registers may be shifted if necessary and mutually compared in every comparison unit. The values in the registers of every comparison unit may be swapped based on the comparison. At output mode, the numerals are outputted sequentially. The values in the registers are shifted and swapped until all numerals are completely outputted. The output appears the sorted numerals with low timing latency.

Reconfigurable sorter and method of sorting

A method for signal estimation and compensation and an apparatus using the same, adapted for estimating and compensating an imbalance effect between an in-phase path and a quadrature path of an Orthogonal Frequency Division Multiplexing (OFDM) communication system are provided. The method includes the following steps: receiving a signal, and using a plurality of symbols in a plurality of time frame to generate a plurality of balance coefficient groups, wherein every balance coefficient group includes a plurality of balance coefficient candidates; deriving a balance coefficient according to the balance coefficient set; and compensating the signal according to the balance coefficient.

Method for signal estimation and compensation and apparatus using the same

A MIMO detection method for a receiver in a MIMO system using N-QAM for modulation, the MIMO detection method including generating a plurality of symbol vector sets and a plurality of search radiuses, selecting a candidate symbol vector set corresponding to a highest level of a multilevel structure of N-QAM constellation, generating a search space corresponding to a lower level of the multilevel structure of N-QAM constellation according to the selected candidate symbol vector set, confirming which level the search space corresponds to, and generating a detection signal according to the search space when the level of the search space is the lowest level of the multilevel structure of the N-QAM constellation.

Multilevel cluster-based MIMO detection method and MIMO detector thereof

A luminance adjustment apparatus for a plasma display panel (PDP) is proposed. The luminance adjustment apparatus includes a luminance controller, a gray level shifter and a power controller. The luminance controller outputs a gray level shifting signal and a power adjustment signal. The gray level shifter receives a first luminance video signal and the gray level shifting signal, after the first luminance video signal being level shifted according to the gray level shifting signal, a gray level shifted video signal is output. The power controller is used to receive the gray level shifted video signal and the power adjustment signal, after the gray level shifted video signal being power adjusted by the power adjustment signal, a sub-field controlling signal is output. This enables the preservation of image gradation when adjusting luminance of a video image.

Apparatus and method for luminance adjustment of plasma display panel

An epitaxial system is provided for performing an epitaxial growth of IIIA-VA compound on the wafer substrate. The epitaxial system includes a first reaction region for providing a plasma of a first reactant, a second reaction region for epitaxially reacting the plasma of the first reactant with a second reactant on a wafer, and a guiding medium disposed between the first reaction region and the second reaction region for passing therethrough the second reactant and the first reactant plasma to the second reaction region.

Epitaxial system

A new method for manufacturing a Group III metal nitride epitaxial wafer comprises providing a first nitrogen-contained gas source, providing a second Group III metal trichloride--containing gas source, and causing said first gas to react with second gas in a heating region, thereby forming a Group III metal nitride epitaxial layer on a substrate. The formed epitaxial wafer can serve as a substrate of a laser diode.

Growing community of inventors

Hsinchu, Taiwan

Wei-Chi Lai