Patent application number | Description | Published |
20090122906 | METHOD AND APPARATUS FOR ENCODING A MODULATED SIGNAL IN A COMMUNICATION SYSTEM - Disclosed is a method and apparatus for encoding a modulated signal in a communication system. The method comprises generating an initial constellation, applying a vertical axis symmetry to the initial constellation to generate a first resulting constellation, translating the first resulting constellation to a left direction of the initial constellation to produce a left flipped constellation, applying a horizontal axis symmetry to the initial constellation to generate a second resulting constellation, translating the second resulting constellation to an up direction of the initial constellation to produce an up flipped constellation, applying a central axis symmetry to the initial constellation to generate a third resulting constellation; and translating the third resulting constellation to a left-up direction of the initial constellation to produce a left-up flipped constellation. | 05-14-2009 |
20090129258 | TRANSMISSION OF SIGNALLING INFORMATION IN AN OFDM COMMUNICATION SYSTEM - An Orthogonal Frequency Division Multiplexing, OFDM, transmitter comprises a signalling data generator ( | 05-21-2009 |
20100111220 | METHOD AND APPARATUS USING SOUNDING PPDUs TO PROVIDE RANGE EXTENSION TO IEEE 802.11n SIGNALS - A wireless transmitter includes a stream parser for generating a plurality of spatial streams from a digital signal and a space time block coder (STBC) for mapping each of the spatial streams to a plurality of space-time streams that each include data and a preamble for estimating a channel transfer function. The transmitter also includes a spatial mapper for spatially expanding each of the space-time streams by applying a spatial expansion matrix to data and to first training symbols used in the preamble to probe a channel experienced by the data and by applying an extension matrix to second training symbols used in the preamble to probe at least one additional dimension of the channel to enable use of beamforming to achieve range extension The spatial expansion matrix and the extension matrix form an overall matrix that has at least two orthogonal columns with different norms. The wireless transmitter also includes an analog front end for modulating the spatially expanded space-time streams onto a wireless carrier. | 05-06-2010 |
20110026639 | SPATIAL MAPPING OF AN OFDM SIGNAL TO REDUCE ATTENUATION FROM AN INDIVIDUAL TRANSMIT ANTENNA IN A MIMO TRANSMITTER - A method is provided for transmitting a digital signal. The method includes generating a plurality of spatial streams from a digital signal and transforming the spatial streams into a plurality of space-time streams. Each of the space-time streams are cycled in the frequency domain among each of a plurality of transmit antennas. The space-time streams are wirelessly transmitted from the plurality of transmit antennas. | 02-03-2011 |
20110134904 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING A DATA SYMBOL STREAM - A transmitter comprises a block generator ( | 06-09-2011 |
20140104183 | METHOD AND DEVICE FOR CONTROLLING AT LEAST ONE APPARATUS BY AT LEAST ONE OTHER APPARATUS, SYSTEM IMPLEMENTING SUCH A DEVICE - A device for controlling at least one so-called slave apparatus, by at least one so-called master apparatus, including a tactile user interface, the device including: first apparatus for transmitting at least one so-called controlled image, generated by the at least one slave apparatus to the at least one master apparatus for displaying the at least one controlled image on the at least one master apparatus; second apparatus for transmitting, from at least one master apparatus to the at least one slave apparatus, at least one coordinate of at least one tactile selection performed on the at least one master apparatus with respect to the at least one controlled image; and a processing apparatus for interpreting the at least one tactile selection at the at least one slave apparatus as a function of the at least one coordinate. | 04-17-2014 |
20140358250 | METHOD AND DEVICE FOR THE CONTROL OF AT LEAST ONE APPLIANCE BY AT LEAST ONE OTHER APPLIANCE, APPLIANCE AND SYSTEM IMPLEMENTING SUCH A DEVICE - A device for the control of at least one so-called slave appliance provided to be controlled by touch, by at least one so-called master appliance including apparatus for commanding, in particular a control pad, the device including a device for transmitting at least one command sent by action on the apparatus for commanding from the at least one master appliance to the at least one slave appliance; a processor provided for interpreting the at least one command thus transmitted and emulating a touch on the slave appliance corresponding to the at least one command. | 12-04-2014 |