Abstract: The present invention concerns a method for estimating, in a communication system, a level of interference plus noise affecting received signals representative of a set of received pilot symbols, characterized in that the method comprises the steps of: dividing the set of received pilot symbols by a corresponding set of pilot symbols, filtering the divided set of received pilot symbols by a filter the coefficients of which are determined from an eigenvector associated with one of the lowest eigenvalues of a channel fading correlation matrix representative of the correlation between the channel coefficients affecting the set of pilot symbols, averaging up the square absolute values of the symbols obtained at the output of the filter in order to estimate the level of interference plus noise affecting the received signals.

Abstract: The present invention concerns a method for determining if a handover of a first half-duplex terminal has to be executed from a first to a second base station. The first base station: transfers signal in the cell of the first base station, receiving a message transferred by the first half-duplex terminal in response to the signal transferred by the first base station, the message comprising information relative to quality measurements on the signals transferred by the first and second base stations, receiving a message indicating if the idle period of the cell of the second base station is compatible with the round trip delay of the first half-duplex terminal in the cell of the second base station, determining if a handover of the first half-duplex terminal has to be executed according to the compatibility.

Abstract: A method for determining, in a wireless cellular telecommunication network, if a base station can handle a half-duplex terminal. The base station transfers signals in a cell of the base station, and the half-duplex terminal, when being handled by the base station, does not transfer or receive signals during a period of time, called idle period of the cell of the base station. If a characteristic of the terminal is not compatible with the idle period of the cell of the base station, it is determined that the base station cannot handle the terminal.

Abstract: A method of de-mapping non-binary Galois field symbols from physical layer code-words in a data communication system, in which at least one physical layer code-word includes portions mapped from more than one non-binary Galois field symbol is provided. The method includes calculating at least a provisional likelihood estimate for values of a first non-binary Galois field symbol having at least portions within a first physical layer code-word, the calculating including selecting a first number of values of a second non-binary Galois field symbol having at least portions within the first physical layer code-word, the first number forming a subset of the possible values of the second non-binary Galois field symbol.

Abstract: A method of transmitting data comprising a plurality of data streams in a broadcasting system is provided. The method includes dividing a frame into a plurality of physical layer zones, allocating the plurality of data streams to the plurality of physical layer zones, allocating signaling information associated with the plurality of physical layers to at least one of the plurality of physical layer regions, and transmitting the frame to which the signaling information is allocated.

Abstract: An encoder and a decoder employ an encoding scheme corresponding to a parity check matrix which is derivable from a bipartite protograph formed of variable nodes and check nodes, with each variable node corresponding to a codeword symbol position. The protograph has a plurality of groups of nodes, each group of nodes comprising both variable nodes and check nodes. Each of the check nodes in a group is of degree 2 and has connections to two variable nodes in the same group. The protograph also has a plurality of check nodes of degree n, where n is the number of said plurality of groups, wherein each of the plurality of check nodes has a connection to a variable node in each group such that the symbol positions in a codeword are interleaved between the groups of nodes.

Abstract: The present invention concerns a method for determining in a wireless cellular telecommunication network in which a half duplex terminal is handled by a first base station, if a second base station is able to handle the half-duplex terminal, characterized in that the method comprises the steps, executed by the half duplex terminal, of: receiving signals from the first base station and from the second base station, determining quality measurements for the signals, determining the time period between the reception of the signal transferred by the first base station and the reception of the signal transferred by the second base station, determining if the second base station is able to handle the half-duplex terminal according to at least the quality measurements and the time period.

Abstract: The present invention concerns a method for determining, in a wireless cellular telecommunication network, if a handover of a half-duplex terminal has to be executed from a first base station to a second base station, the half-duplex terminal not transferring and not receiving signals during a period of time, called an idle period. The first base station: transfers signal in the cell of the first base station, receives a message transferred by the half-duplex terminal comprising information relative to quality measurements on the signal transferred by the first and the second base stations, obtains information enabling the determination of the round trip delay between the half-duplex terminal and the second base station, determines the round trip delay determines if a handover has to be executed according to the determined round trip delay and the information relative to quality measurements.

Abstract: The present invention concerns a method for determining, in a wireless cellular telecommunication network, if a base station can not handle a half-duplex terminal, the base station transferring signals in a cell of the base station, the half-duplex terminal, when being handled by the base station, not transferring and not receiving signals during a period of time, called idle period of the cell of the base station. The base station: transfers signals in the cell of the base station, receives a signal transferred by the half-duplex terminal in response to a signal transferred by the base station, determines from the received signal, a characteristic of the half-duplex terminal in the cell, determines that the base station can not handle the half-duplex terminal if the characteristic of the half-duplex terminal in the cell is not compatible with the idle period.

Abstract: The present invention concerns a method for determining if a handover of a first half-duplex terminal has to be executed from a first to a second base station. The first base station: transfers signal in the cell of the first base station, receiving a message transferred by the first half-duplex terminal in response to the signal transferred by the first base station, the message comprising information relative to quality measurements on the signals transferred by the first and second base stations, receiving a message indicating if the idle period of the cell of the second base station is compatible with the round trip delay of the first half-duplex terminal in the cell of the second base station, determining if a handover of the first half-duplex terminal has to be executed according to the compatibility.

Abstract: The present invention concerns a method for estimating, in a communication system, a level of interference plus noise affecting received signals representative of a set of received pilot symbols, characterized in that the method comprises the steps of: dividing the set of received pilot symbols by a corresponding set of pilot symbols, filtering the divided set of received pilot symbols by a filter the coefficients of which are determined from an eigenvector associated with one of the lowest eigenvalues of a channel fading correlation matrix representative of the correlation between the channel coefficients affecting the set of pilot symbols, averaging up the square absolute values of the symbols obtained at the output of the filter in order to estimate the level of interference plus noise affecting the received signals.

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.