Industrial Technology Research Institute

Hsin-Piao Lin

Ming-Chien Tseng

Ming-Hung Cheng

Ching-Jen Chang

A multipath switching system comprising of an adjustable phase shift array includes, an adjustable phase shift array module and a control module. The adjustable phase shift array module receives a radio-frequency (RF) signal, and includes at least one RF switch, at least one coupler and at least one phase shifter. The at least one RF switch, the at least one coupler and the at least one phase shifter form a number of transmission paths. The transmission paths respectively produce the processed transmission RF signals corresponding to different phase shifts to an antenna array. The control module controls the at least one RF switch and the at least one phase shifter of the adjustable phase shift array module, so that the antenna array radiates a wireless signal whose direction is corresponding to a predetermined angle in space polar coordinates.

Multipath switching system having adjustable phase shift array

The present invention relates to an adaptive automatic repeat-request apparatus and method for an MIMO system including a transmitter and a receiver. The apparatus comprises an adaptive retransmission component located at the transmitter. The adaptive retransmission component uses a special frame structure that divides the transmission data in a frame into several sections according to the number of transmission antennas, and adds an individual error detecting code within each section. The transmission data are sent to the receiver through the several antennas. The receiver responds to the adaptive retransmission component with feedback information of an acknowledgement or negative acknowledgement signal, and detected signal strength of data for each transmission antenna. After receiving the signal strength of transmission data, the retransmission signal vector for error data is determined.

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Taoyuan, Taiwan

Hsin-Piao Lin