Abstract: A method for determining a shifting parameter P to be used by a telecommunication device for mapping symbols on sub-carriers, the telecommunication device including at least two transmit antennas, the symbols being transferred through each antenna of the telecommunication device on at least an even number K, strictly greater than two, of sub-carriers allocated to the telecommunication device. The telecommunication device transfers on a first antenna on each sub-carrier ‘k’, a signal representing a symbol ‘Xk’ in the frequency domain. The telecommunication device transfers on a second antenna on each sub-carrier ‘k’, a signal representing a symbol ‘X?k’ derived from the signal transferred on the first transmit antenna, for each frequency k, by the formula XKsecondAnt=?(?1)k+1X*(p-l-k)mod K.

Abstract: A method for identifying at least one terminal for which signals transferred between the at least one terminal and a base station of a wireless cellular telecommunication network have to be relayed by a relay, the base station providing a random access channel enabling any terminal to notify to the base station the presence of the terminal by transferring a random access signal to the base station. The relay: transfers the random access signal to the base station for obtaining a list of at least one terminal, receives the list, identifies, from the received list, at least one terminal for which signals transferred between the at least one identified terminal and the base station have to be relayed by the relay, and relays signals between the at least one identified terminal and the base station.

Abstract: A method and device in the domain of wireless communication, and more specifically coding and decoding schemes useful in the context of MIMO (Multiple Input Multiple Output) or MISO (Multiple Input Single Output) communications especially used in conjunction of OFDM-like transmission schemes. A space frequency block code applies some well chosen two by two space frequency block codes to each pair of frequencies ? and ?+N/2. The proposed SFBC keep the constant envelope property for each antenna while leading to a good performance by introducing some spatial diversity.

Abstract: The present invention concerns a method for allocating, by a telecommunication device, at least a channel element of a group of channel elements of a channel resource to a destination. Each channel element is a predefined subdivision of the channel resource. The telecommunication device: determines the number of channel elements to be allocated to the destination; selects at least one randomisation function according to the number of channel elements to be allocated to the destination; processes the data to be included in the or each channel element to be allocated to the destination by the at least one selected randomisation function; transfers the data processed by the at least one selected randomisation function by mapping the data processed by the at least one randomisation function on the at least one channel element.

Abstract: A method for deciding if a telecommunication device has to be switched in an operating mode which is different from the operating mode in which the telecommunication is operating. In an operating mode, the telecommunication device relays signals transferred between a terminal and an access node which handles the terminal. In another operating mode, the telecommunication device handles the terminal. The method includes: determining, from obtained information, if a predetermined event occurs, and if the predetermined event occurs, deciding that a handover of the terminal has to be conducted between the access node and the telecommunication device, and deciding that the telecommunication device has to switch in an operating mode which is different from the operating mode in which the telecommunication is operating.

Abstract: A method for transmitting data in a telecommunication system including at least one transmitter comprising at least two transmitting antennas and at least one receiver comprising at least one receiving antenna, the method including: transforming a plurality of bits of the data to be transmitted into a plurality of symbols by modulating the plurality of bits of the data at the transmitter; generating a first vector formed by the plurality of symbols at the transmitter; preparing a modified matrix by modifying an original matrix based on the number of rows of the first vector, the original matrix being predefined at the transmitter; generating a second vector by multiplying the first vector with the modified matrix at the transmitter; and transmitting symbols forming the second vector over communication channels established between the at least two transmitting antennas of the transmitter and the at least one receiving antenna of the receiver.

Abstract: The present invention concerns a method for transferring information enabling the adjustment of the transmission power of the signals transferred and/or received by a first base station through a wireless interface, a cell of the first base station being at least partly comprised in a cell of a second base station. A mobile terminal for which a handover has been or has to be conducted between the first and second base stations obtains information related to the path between the second base station and the mobile terminal and transfers information to the first base station.

Abstract: The present invention concerns a method for adjusting the transmission power of signals transferred by or to a first base station, the first base station being located in the cell of a second base station, the first base station: transfers a first message to the second base station, receives a message comprising information representative of the path between the first base station and the second base station, receives messages transferred by the second base station to mobile terminals, information comprised in at least one message enabling the determination of the coverage of the second base station, computing a metric from both information, adjusting, according to the computed metric, the transmission power of the signals transferred by the first base station to at least a mobile terminal and/or the transmission power of the signals transferred to the first base station by at least one mobile terminal.

Abstract: A method for transmitting data in a telecommunication system including at least one transmitter including at least two transmitting antennas and at least one receiver including at least one receiving antenna. The method includes: transforming a plurality of bits of the data to be transmitted into a plurality of symbols by modulating the plurality of bits of the data at the transmitter; generating a first vector formed by the plurality of symbols at the transmitter; preparing a modified matrix by modifying an original matrix based on a number of rows of the first vector, the original matrix being predefined at the transmitter; generating a second vector by multiplying the first vector with the modified matrix at the transmitter; and transmitting symbols forming the second vector over communication channels established between the at least two transmitting antennas of the transmitter and the at least one receiving antenna of the receiver.

Abstract: The present invention concerns a method for determining shifting parameters p1 and p2 to be used by a first and a second telecommunication devices for mapping symbols on sub-carriers. The method comprises the steps of: allocating to the first and the second telecommunication device sub-carriers, at least a part of the sub-carriers allocated to the first telecommunication device being allocated to the second telecommunication device, determining the shifting parameter p2, the shifting parameter p2 being even and at least equal to the number of overlapping sub-carriers allocated to both the first and the second telecommunication devices or the shifting parameter p2 being even and at most equal to M2 minus the number of overlapping sub-carriers allocated to both the first and the second telecommunication devices.

Abstract: A SC-QOSTFBC (Single Carrier-Quasi Orthogonal Space Time Frequency Block Code) for 4 transmit antennas in the domain of wireless communication, and coding and decoding schemes useful in the context of MIMO (Multiple Input Multiple Output) or MISO (Multiple Input Single Output) communications especially used in conjunction of OFDM-like transmission schemes. These codes are based on sending on a first antenna a constellation corresponding to what would be sent in a mono antenna scheme, and sending equivalent constellations on the other antennas. The codes are designed to keep a low-PAPR property at each transmit antenna when associated with DFT spread OFDM.

Abstract: A method of dynamically assigning spreading sequences of a group of spreading sequences to users of a Multi-Carrier transmission network and/or to at least a common signal for a plurality of users of the Multi-Carrier transmission network. The spreading sequences are put in a natural order and are dynamically assigned according to their order to users of the Multi-Carrier transmission network and/or to at least a common signal to a plurality of users of the Multi-Carrier transmission network.

Abstract: Coding and decoding schemes useful in the context of MIMO (Multiple Input Multiple Output) or MISO (Multiple Input Single Output) communications especially used in conjunction of OFDM-like transmission schemes. A space frequency block code (SFBC) is based on the simultaneous use of two variants of Alamouti codes in the frequency domain, each kind of Alamouti code being applied to well-chosen pair of frequencies. The proposed SFBC keeps the constant envelope property for each antenna while leading to performance equal or very close to the pure Alamouti STBC performance.

Abstract: A method and device in the domain of wireless communication, and more specifically coding and decoding schemes useful in the context of MIMO (Multiple Input Multiple Output) or MISO (Multiple Input Single Output) communications especially used in conjunction of OFDM-like transmission schemes. A space frequency block code applies some well chosen two by two space frequency block codes to each pair of frequencies ? and ?+N/2. The proposed SFBC keep the constant envelope property for each antenna while leading to a good performance by introducing some spatial diversity.

Abstract: A method of communication in a Multi-Carrier transmission network including plural mobile terminals. The method includes dynamically assigning subgroups of spreading sequences of a set of spreading sequences to each of the mobile terminals. Each of the subgroups includes different spreading sequences than in other subgroups, and each of the subgroups of spreading sequences includes a first spreading sequence and at least one other spreading sequence.

Abstract: The present invention concerns a method for obtaining a context of a mobile terminal (30) which is expecting to be served by a first base station (10b) of a wireless telecommunication network comprising a plurality of base stations (10) linked together by a telecommunication network. The first base station which is expected to serve the mobile terminal, receives a first message from the mobile terminal (30) through a wireless interface, the message comprising at least an identifier of the mobile terminal (30) and an identifier of a second base station (10a), transfers through the telecommunication network (50) a second message to the second base station (10a) of which the identifier is comprised in the received message, receives through the telecommunication network a third message from the second base station, the third message message comprising the context of the mobile terminal.

Abstract: The present invention concerns a method for determining a corrected estimated variance representative of the condition of reception of signals representative of symbols transferred by an emitter to a receiver through a communication channel, wherein the method comprises the step, executed by the receiver, of producing an estimation of the variance by a Wiener channel estimator comprising a linear filter of which coefficients are determined at least from a given average signal to interference plus noise ratio value, the method being characterised in that it comprises farther step, executed by the receiver, of: multiplying the estimation of the variance by a correction factor, the value of the correcting factor being dependent at least on the number of coefficients of the linear filter of the Wiener channel estimator.

Abstract: An apparatus and method for a Multi-Carrier Code Division Multiple Access (“MC-CDMA”) transmission network is disclosed. In the MC-CDMA transmission network a plurality of spreading sequences are assigned to individual users from a plurality of predetermined spreading sequences. The spreading sequences are assigned to users in order to minimize the interference created by the assignment of spreading sequences.

Abstract: An equalization method for a downlink channel in an MC-CDMA telecommunication system includes a plurality of links established between a transmitter and a plurality of receivers, each link using a distinct access code amongst N possible codes. The method includes a first step of estimating the relative levels of the signals transmitted by the transmitter using each of the N codes, the first step including an equalization of the MC-CDMA symbols carrier by carrier, and a second step using the levels for estimating the symbols transmitted by the user over at least one link, the second step being adapted to minimize the mean square error between the transmitted symbols and the estimated symbols.

Abstract: The invention concerns a pre-distortion method for a telecommunication system comprising a base station and at least one user. Each symbol of said user is spread with a coding sequence over a plurality of carriers to produce a plurality of corresponding frequency components of a signal (Si(t)) to be transmitted over an uplink transmission channel to said base station. Each frequency component is weighted by a weighting coefficient (?i(l)), said weighting coefficient being determined from the downlink channel response coefficient (hi(l)) at the corresponding frequency and from a value of the noise variance (?2) affecting said carriers.