| SEQUANS COMMUNICATIONS Patent applications |
| Patent application number | Title | Published |
|---|
| 20120134322 | CELL SEARCH METHOD FOR A DOWNLINK CHANNEL OF AN OFDMA TRANSMISSION SYSTEM - A cell search method in a multiple carrier wireless network includes a step of trying to select, among a list of candidate couples [carrier frequency; bandwidth], at least one candidate associated with at least one cell of the multiple carrier wireless network. The cell search method includes: a step of obtaining and ordering an initial list of possible candidate couples [carrier frequency; bandwidth] according to the multiple carrier wireless network; a step of reducing the initial list, delivering a reduced list, the reduced list including only candidates compatible with a predetermined communication mode of the multiple carrier wireless network, through a differential cross correlation of the candidate couples [carrier frequency; bandwidth] of the initial list; a cell search step in which a cross-correlation is performed by testing all time/frequency hypothesis for at least one candidate of the reduced list of candidates, delivering synchronisation information. | 05-31-2012 |
| 20120093246 | Channel Estimation Method - A channel estimating method is provided for a signal transmitted in an orthogonal frequency division multiplexing (OFDM) system, wherein an OFDM symbol of the signal has at least one null subcarrier set in its defined bandwidth. The method includes: obtaining at least one initial channel estimate over at least one OFDM symbol of a received signal; processing the at least one initial channel estimate for delivering at least one soft information in a form of a complete matrix; and updating the at least one initial channel estimate by performing a truncated singular value decomposition of a partial FFT matrix. The partial FFT matrix includes only the first L | 04-19-2012 |
| 20120076087 | Tile Allocation Method - A method and apparatus are provided for allocating and transmitting groups of subcarriers, called tiles, between a plurality of transceiver antennas. The method includes receiving at least one downlink signal by a subscriber station transceiver through at least one of the plurality of subscriber station antennas, characterizing a received signal of at least one downlink signal over multiple subcarriers, and allocating tiles for uplink transmission through at least one of the plurality of transceiver antennas. The tiles allocation is based on the characterized received signal of the at least one downlink signal over multiple subcarriers and is based on a required power Ptx for uplink transmission compared with a maximum power P that each of the plurality of the transceiver antennas can emit. | 03-29-2012 |
| 20110235735 | METHOD AND APPARATUS FOR OPTIMIZING TRANSMISSION DIVERSITY - A method and apparatus are provided for transmission in a communication system. The system includes a transmitter having at least one first and second antenna and a receiver, which includes at least one receiving antenna. The method includes determining a transmit diversity scheme for at least one group of symbols from among a plurality of modulated symbols. This step includes at least one step of obtaining a phase shift of at least one symbol of the at least one group of symbols. The phase shift is based on: at least one phase shift parameter N; and responses (h | 09-29-2011 |
| 20110205989 | METHOD AND APPARATUS FOR ENHANCING UL THROUGHPUT IN OFDMA SYSTEMS - A method is provided for enhancing uplink frame throughput in an OFDMA system. The method includes an uplink map fill phase for at least one mobile station including allocation of grants in said uplink frame for the at least one mobile station. After the fill phase, the method includes at least one iteration of: a subchannel expansion in which at least one slot is allocated for transmission, for a current grant, to a mobile station in the layer of the uplink frame, the expansion being performed for at least one of the at least two mobile stations, and the expansion delivering an expanded uplink map; and a slot compression step, from the expanded uplink map, in which an improvement of a modulation and coding scheme is realized by changing the modulation and coding scheme of a grant dependent on an current pair's optimizing mutual capacity, delivering an improved uplink map. | 08-25-2011 |
| 20110128842 | Method for Estimating a Received Signal and Corresponding Device - A method and apparatus for estimating a transmission channel in a receiver of an OFDMA signal formed by a plurality of carriers modulated by data elements and distributed in the time-frequency domain in successive symbols, the plurality of carriers including pilot carriers, modulated by reference data elements known by receivers. The method includes: receiving a signal comprising a series of n symbols covering at least one resource block; making an initial channel estimation by identifying the pilot carriers included in the series of n symbols; determining diagonal entries of p frequency domain channel matrices G | 06-02-2011 |
| 20100166099 | METHOD FOR TRANSMITTING AND ESTIMATING SYMBOLS CODED WITH A CODING MATRIX, AND CORRESPONDING RECEIVER AND TRANSMITTER - An embodiment of a method for transmitting a sequence of symbols through at least a channel in a wireless communication system comprises at least the steps of:
| 07-01-2010 |
| 20100135445 | Wireless Communications Method and System With Spatial Multiplexing Using Dually Polarized Antennas and Corresponding Receiver - A method is provided for transmitting radio signals. Two channels are defined by two transmit antennas, having two orthogonal directions, together with two receive antennas, having two orthogonal directions. An optimal quality of one received signal is determined by signal processing, which emulates a rotation of the two orthogonal receive directions, and a mutual interference of the signals received on the two channels, due to a polarization mismatch, is cancelled, based on a corresponding optimal rotation angle. | 06-03-2010 |
| 20090316824 | METHOD FOR TRANSMITTING A SEQUENCE OF SYMBOLS FOR EXPLOITING TRANSMIT DIVERSITY - An embodiment of a method for transmitting data through at least a channel in a wireless communication system, the method comprising at least the steps of:
| 12-24-2009 |
| 20090290552 | METHOD AND SYSTEM FOR CHANNEL SCANNING IN A WIRELESS COMMUNICATIONS SYSTEM - A method is provided for channel scanning in a wireless communications system, for the identification of one or more narrow-band channels present in a certain frequency band and which can be used for connection between a wireless communications device and a communications network. The method includes: applying a FFT function to at least one signal corresponding to a given frequency band, providing for a set of coefficients each being representative of a frequency, analyzing the coefficients so as to detect at least one frequency region having at least one predetermined feature, and determining at least one channel position, by considering that each of the at least one frequency region having at least one predetermined feature is a guard band of one of the at least one channel. | 11-26-2009 |
| 20090274121 | METHOD AND SYSTEM FOR RADIO ACCESS TECHNOLOGY MONITORING IN A WIRELESS COMMUNICATIONS SYSTEM - A method and apparatus are provided for radio access technology (RAT) monitoring, in a wireless system environment having wireless communications equipment and at least two different RATs that coexist for providing to the equipment access to one or more communications networks. The equipment has at least two subsystems, each adapted for establishing and maintaining an active communications connection with a certain one of the different RATs. The equipment selects at least a first RAT, among all the RATs available in a certain geographical area, for establishing the active communications connection, according to a monitored characteristic of the first RAT. The method includes scanning a characteristic of a second RAT available for communication in the geographical area while the equipment maintains an active communications connection with the first RAT, and performing the scanning step when the equipment does not transmit signals through the active communications connection maintained with the first RAT. | 11-05-2009 |
| 20090233594 | METHOD FOR CONTROLLING INTERFERENCE GENERATED BY A MOBILE STATION ON NEIGHBOR BASE STATIONS - An embodiment of a method for controlling the interference level generated by a mobile station comprising at least steps:
| 09-17-2009 |
| 20090016474 | METHOD FOR SWITCHING A COMPONENT TO AN OPERATION MODE FOR REDUCING POWER CONSUMPTION IN A WIRELESS COMMUNICATION DEVICE - An embodiment of a method for switching to an operating mode a device comprising a counter counting the pulses number of a first clock and a date synchronized with an external reference date. | 01-15-2009 |
| 20080279322 | Method and device for timing synchronization and neighbor scanning for cellular OFDM systems - An embodiment of a device for processing at least an incoming signal in a wireless communication system, said incoming signal being sent by a base station and comprising successive frames, each of which comprising at least a training symbol correlated to said base station, and a data symbol carrying message data. | 11-13-2008 |
