| RALINK TECHNOLOGY, INC. Patent applications |
| Patent application number | Title | Published |
|---|
| 20100086013 | METHOD AND APPARATUS FOR RECEPTION IN A MULTI-INPUT-MULTI-OUTPUT (MIMO) ORTHOGONAL FREQUENCY DOMAIN MODULATION (OFDM) WIRELESS COMMUNICATION SYSTEM - An embodiment of the present invention includes a transceiver for use in a multi-input-multi-output (MIMO) Orthogonal Frequency Domain Multiplexing (OFDM) wireless communication system. The transceiver decodes and remodulates certain signal fields and uses the same to update the coefficients of a frequency equalizer thereby improving channel estimation and extending training. | 04-08-2010 |
| 20090046768 | METHOD AND APPARATUS FOR ADAPTIVE REDUCED OVERHEAD TRANSMIT BEAMFORMING FOR WIRELESS COMMUNICATION SYSTEMS - A multi input multi output (MIMO) transceiver having a channel estimation module being responsive to received samples including channel state information (CSI) and operative to generate time domain beamforming parameters, in accordance with an embodiment of the present invention. The multi input multi output (MIMO) transceiver further includes an adaptive beamforming parameters module coupled to receive said time domain beamforming parameters and operative to generate time domain adaptive beamforming parameters, said adaptive beamforming parameters module operative to process said time domain beamforming parameters to generate frequency domain adaptive beamforming parameters, a decoding module coupled to receive said frequency domain adaptive beamforming parameters and operative to generate data bits, a channel parameters module coupled to receive said data bits and operative to extract said time domain adaptive beamforming parameters, an encoding module coupled to receive said time domain adaptive beamforming parameters and operative to generate a data packet, said encoding module operative to encode said data packet to generate a modulated data stream, and a beamform matrices module coupled to receive said modulated data stream and operative to generate a beamformed data stream based on said frequency domain adaptive beamforming parameters, said MIMO transceiver operative to process said beamformed data stream to generate output signals and to transmit said output signals by forming beam patterns. | 02-19-2009 |
| 20090046011 | Method and Apparatus for Calibration for Beamforming of Multi-Input-Multi-Output (MIMO) Orthogonol Frequency Division Multiplexing (OFDM) Transceivers - An embodiment of the present invention includes a calibration system employed in a multi-input-multi-output (MIMO) system for beamforming and receiving a plurality of streams. The system includes a first calibration circuit responsive to inphase (I) and quadrature (Q) pairs of stream and operative to calibrate each I and Q pair and a second calibration circuit responsive to the calibrated I and Q pairs for all streams, wherein the first and second calibration circuits perform calibration in the time domain. | 02-19-2009 |
| 20090046003 | Method and Apparatus for Beamforming of Multi-Input-Multi-Output (MIMO) Orthogonol Frequency Division Multiplexing (OFDM) Transceivers - An embodiment of the present invention includes a calibration system employed in a multi-input-multi-output (MIMO) system for beamforming and receiving a plurality of streams. The system includes a first calibration circuit responsive to inphase (I) and quadrature (Q) pairs of stream and operative to calibrate each I and Q pair and a second calibration circuit responsive to the calibrated I and Q pairs for all streams, wherein the first and second calibration circuits perform calibration in the time domain. | 02-19-2009 |
| 20080268865 | BEAMFORMING WITH GLOBAL POSITIONING AND ORIENTATION SYSTEMS - A wireless communication system for transmitting signals having a wireless positioning system being responsive to incoming signals for processing the same to generate coordinate information for determining the position of said wireless communication system, in accordance with an embodiment of the present invention. The wireless communication system further includes a phase controller module being responsive to said coordinate information for controlling the phase of the output signals for transmission in a specified direction by performing beamforming, said wireless communication system for performing beamforming to increase the range of transmission of said output signals. | 10-30-2008 |
