Abstract: The method comprising: applying, by a transmitter, a Forward Error Correction to an information block to be sent to a receiver and modulating said information block prior to its transmission, wherein the transmitter has knowledge of a channel frequency response seen by the receiver and the applying and modulating are performed at a variable-rate, at the transmitter side, by: transforming the information block into a number of smaller packets denoted as codeblocks fitting the input sizes accepted by the Forward Error Correction; selecting, a set of modulation and coding schemes to be independently applied to each of the codeblocks; including, information about the selected set of modulation and coding schemes within part of physical resources devoted to user data by reserving specific subcarriers and OFDM symbols; and mapping, said information within physical resources devoted to user data and not reserved for said selected set of modulation and coding schemes, first in order of ascending OFDM symbols and then

Abstract: The method comprising at least one phase synchronized cellular base station having at least one transmit antenna for transmitting a signal to a at least one non-phase synchronized cellular base station, where it comprises transmitting by said at least one transmit antenna of said phased-synchronized cellular base station a beacon signal to said at least one non-phase synchronized cellular base station, included as part of said transmitted signal, said beacon signal comprising two orthogonal length-8 Walsh-Hadamard sequences to be broadcasted by said at least one phase synchronized cellular base station in order to provide said phase synchronization.

Abstract: A system, method and device for error detection/estimation in OFDM communications systems is proposed. The disclosed mechanism allows an efficient error prediction in a received packet, without having to perform full FEC decoding of the packet that could impair the overall latency of the system due to the time spent in a complete FEC decoding of the packet. In order to do that, it generates a decision variable with the aim to check whether a received packet has errors or not, after performing only partial FEC decoding of the packet, without either resorting to the use of error-detection codes.

Abstract: A method involving coordinating resources between a victim and an aggressor base station in massive MIMO systems, whereby only those specific beams involved in the interference scenario are coordinated in time and/or frequency domains without affecting other resources committed to other users as well as legacy users. Also disclosed is a system and computer program configured to implement the method.

Abstract: Method to perform joint scheduling in the downlink or in the uplink of a centralized OFDM radio access network for a plurality of users considering time, frequency and space domains, scheduler device thereof and computer program products. The method to be applied in the downlink or in the uplink of a centralized radio access network based on OFDM, whereby a set of remote radio heads of a set of remote units are connected to a central unit, that performs all (or part of) the radio-related processing tasks, wherein the scheduling exploit CoMP, NOMA and RF conditions and resource blanking techniques.

Abstract: A Method for increasing coverage and robustness against frequency offsets in wireless networks, user device and computer program products In the method, a user device (171) that wirelessly communicates with a base station (172) through a wireless network employing a Single Carrier-Frequency Division Multiple Access, SC-FDMA, comprises: applying a number of calculated repetitions of a block of complex information symbols prior to a SC-FDMA modulator (176), said number of repetitions being an integer submultiple of a number of subcarriers scheduled for uplink transmission according to the expression: NscUL=L×M with L and M integers; and applying, when mapping to scheduled resources in the SC-FDMA modulator (176), a frequency shift equal to a subcarrier width multiplied by one half of said number of repetitions.

Abstract: The method includes: performing a packet scheduling for a plurality of user terminals (UEs) based on information regarding QoS classes, the information regarding QoS classes is included in QoS class identifiers received from an Evolved Packet Core providing communication services to the user terminals. The method further includes receiving channel quality indicators from the plurality of user terminals and performing the scheduling also on the basis of the received channel quality indicators. The system of the invention is arranged to implement the method of the invention.

Abstract: The method comprising at least one user device provided with at least four antennas, wirelessly connected to a serving base station having between one and four transmit antennas and suffering interferences from at least one interfering base station having between one and four transmit antennas, establishing a data transmission link among a plurality of antennas, and: applying a time shift delay between said serving base station and said at least one interfering base station in order to avoid collision between Cell Reference Signals (CRS) of serving and interfering base stations when said data transmission is established; and introducing changes on the physical layer for PDSCH transmission and reception aimed at achieving inter-layer interference cancellation, said changes introduced comprising the introduction of a pattern of transmission gaps at symbols (l) and subcarrier indices (k) of interfering cell's CRS signals, which will be exploited by said at least one user device for effective interference canc

Abstract: The method comprising passing, a base station or a user terminal, information comprising data signals and encoding, a first and a second turbo encoders, said received data signals, generating two different turbo code blocks comprising a set of systematic and parity bits. Where, in order to enhance detection the two different turbo code blocks are simultaneously transmitted through a wireless OFDM system and wherein the data signals to be encoded by said second turbo encoder are interleaved prior encoding by an external bit interleaver. The system of the invention is arranged to implement the method of the invention.

Abstract: A system, method and device for error detection/estimation in OFDM communications systems is proposed. The disclosed mechanism allows an efficient error prediction in a received data block (e.g. a packet) without using error detection codes that may impair spectral efficiency (due to the overhead) especially when very small size packets are used. In order to do that, it generates a decision variable with the aim to check whether a received block has errors or not, without resorting to the use of error-detection codes.

Abstract: The method comprising at least one wireless user terminal, UE, connected through a wireless network to a serving base station and a plurality of network cells, each one comprising a base station, said at least one wireless UE: estimating the cell loads of the serving base station and of the plurality of network cells by analysing a downlink air interface load; providing to said wireless network, information about the actual cell load estimation of said plurality of cells, and performing a network cell selection based on said estimated cell loads, wherein said cell selection is performed without any exchange of cell load between said plurality of network cells.

Abstract: The system comprises a plurality of radio access nodes, or cells, each of said cells providing a coverage area to a plurality of user equipments, characterized in that each of said radio access nodes is splitted into: a common processing section (1) which performs a main processing stage; and a plurality of remote transceiving sections (2a, 2b, 2c), each performing a local processing stage complementing said main processing stage, being operatively connected to said common processing section, and constituting a sub-cell providing a coverage sub-area, wherein said coverage area is distributed into said coverage sub-areas. The method is arranged for carrying out said splitting of radio access nodes.

Abstract: A system and method for reducing interferences in OFDM networks comprising generating (31) a set of pseudo-random coordination patterns {kin; i=0, . . . , N?1; n=0, . . . , M?1}, wherein kin are integers from 0 to M?1, M is the number of calls in a coordination cluster, N is the number of subcarriers, n is a cell identifier within the coordination cluster, and kin?kim?n?m, i=0, . . . , N?1; generating a randomizing pattern common to all cells within the coordination cluster, comprising an invertible transformation in the time domain of the complex symbols for each subcarrier; spreading (32) the complex symbols over M TTIs: b ? [ i , m ] = M ? ? m = 0 T - 1 ? ? a ? [ i , n ] ? exp ? [ - j2? ? ( Mn + k i ) · m / ( M · T ) ] . wherein a[i,n] denotes the symbols prior to the spreading (32), b[i,m] denotes the symbols after the spreading (32), 0?k1?M?1, i=0, . . . , N?1, m=0, . . .

Abstract: Methods, a base station and computer programs for performing multiple access in wireless OFDM cellular systems over multipath wireless channels considering both space and frequency domains, The base station 100 comprises a large number of antennas 103 in the form of a two-dimensional array and transmits a given number of signals to a number of users 106, so that each one receives its intended signal (or set of intended signals) without interference to/from the other users 106. The base station 100 includes a scheduler in space-time-frequency dimensions 101 as well as an orthogonal space-frequency processing technique 102 for addressing the users 106. The cellular scenario is assumed where the wireless channel 105 presents significant multipath, thereby resulting in multiple signal components being received by each user 106.

Abstract: Methods, a base station and computer programs for performing multiple access in wireless OFDM cellular systems over multipath wireless channels considering both space and frequency domains, The base station 100 comprises a large number of antennas 103 in the form of a two-dimensional array and transmits a given number of signals to a number of users 106, so that each one receives its intended signal (or set of intended signals) without interference to/from the other users 106. The base station 100 includes a scheduler in space-time-frequency dimensions 101 as well as an orthogonal space-frequency processing technique 102 for addressing the users 106. The cellular scenario is assumed where the wireless channel 105 presents significant multipath, thereby resulting in multiple signal components being received by each user 106.

Abstract: A system and method are provided for reducing the overhead caused by the presence of the cyclic prefix while enabling inter-carrier interference (ICI) and inter-symbol interference (ISI) cancellation in an Orthogonal Frequency Division Multiplexing (OFDM) network that includes an OFDM transmitter and an OFDM receiver.

Abstract: A system and method are provided for assisting user devices in performing OFDMA downlink interference cancellation, in which an interfering base station transmits a downlink signal in a first slot and a second slot, both slots including cell reference signals (CRSs) for physical channel estimation, the CRS of the second slot is modified to indicate encoded values of parameters characterizing the physical channel according to an encoding procedure, the slots are received by a served user device that detects the physical channel parameters carried by dedicated control signalling and encodes them by the encoding procedure, an unchanged CRS is reconstructed, and the slots are received by an interfered user device obtaining the encoded values and comparing to parameter patterns indicating absence of modifications in the CRSs, wherein if the encoded values are different from the patterns, the interfered user device decodes them to perform interference cancellation of the downlink signal.

Abstract: The method comprising a base station equipped with a large number of antennas according to a two-dimensional rectangular array and a number M of cell users, said rectangular array comprising N1 antenna elements along one axis with a regular spacing dx and N2 antenna elements along a perpendicular axis with a regular spacing dy, said users being characterized by angles (?,?) in a spherical coordinate system, where in order to achieve orthogonal multiple access the method comprises: selecting a grid spacing (?u,?v) in the (u, v) domain; discretizing the (u, v) domain; constructing a set of signals ST[k,l,f]; calculating time-domain excitations AT[n,m,t]for the antenna elements in the array given by coordinates (ndx,mdy) for generation of the downlink transmit signals; and obtaining the frequency contents SR[k,l,f] of the complex baseband signals received from the M users in the uplink. The system implements the method of the invention.

Abstract: A Method for increasing coverage and robustness against frequency offsets in wireless networks, user device and computer program products In the method, a user device (171) that wirelessly communicates with a base station (172) through a wireless network employing a Single Carrier-Frequency Division Multiple Access, SC-FDMA, comprises: applying a number of calculated repetitions of a block of complex information symbols prior to a SC-FDMA modulator (176), said number of repetitions being an integer submultiple of a number of subcarriers scheduled for uplink transmission according to the expression: NscUL=L×M with L and M integers; and applying, when mapping to scheduled resources in the SC-FDMA modulator (176), a frequency shift equal to a subcarrier width multiplied by one half of said number of repetitions.

Abstract: In the method, a user device detects interferences a single dominant interferer of a neighbor base station, said user device provided with at least two antennas and said user device connected to a main base station, said main base station introducing a pattern of transmission gaps for certain Resource Elements in the Resource Element mapping function by switching off the transmission, being said certain Resource Elements in the Resource Element mapping function introduced for the PDSCH complex symbols.