Abstract: The present invention relates to an antenna comprising multiple array elements with a first and second feeding point, each associated with orthogonal polarizations, each array element has a first and second phase centre each associated with the orthogonal polarizations, the first and second phase centres of said array elements are arranged in at least two columns, and one antenna port connected to the first and second feeding points of at least two array elements with first phase centre and second phase centre arranged in the at least two columns via a respective feeding network. The feeding network comprises a beam forming network having a primary connection, connected to the antenna port, and at least four secondary connections. The beam forming network divides power between the first feeding point and the second feeding point and controls phase shift differences between the respective feeding points with phase centre arranged in different columns.

Abstract: The present invention relates to an antenna comprising multiple array elements with a first and second feeding point, each associated with orthogonal polarizations, each array element has a first and second phase centre each associated with the orthogonal polarizations, the first and second phase centres of said array elements are arranged in at least two columns, and one antenna port connected to the first and second feeding points of at least two array elements with first phase centre and second phase centre arranged in the at least two columns via a respective feeding network. The feeding network comprises a beam forming network having a primary connection, connected to the antenna port, and at least four secondary connections. The beam forming network divides power between the first feeding point and the second feeding point and controls phase shift differences between the respective feeding points with phase centre arranged in different columns.

Abstract: The present invention relates to an antenna comprising multiple array elements with a first and second feeding point, each associated with orthogonal polarizations, each array element has a first and second phase centre each associated with the orthogonal polarizations, the first and second phase centres of said array elements are arranged in at least two columns, and one antenna port connected to the first and second feeding points of at least two array elements with first phase centre and second phase centre arranged in the at least two columns via a respective feeding network. The feeding network comprises a beam forming network having a primary connection, connected to the antenna port, and at least four secondary connections. The beam forming network divides power between the first feeding point and the second feeding point and controls phase shift differences between the respective feeding points with phase centre arranged in different columns.

Abstract: The present invention relates to a method of generating two beams, having orthogonal polarizations, covering a selected area using an antenna (20) comprising multiple dual-polarized array elements (11). Each dual-polarized array element having a first phase center (18) associated with a first polarization and a second phase center (18) associated with a second polarization. The method comprises: designing a first weight matrix having a first non-zero weight vector for the first polarization and a second non-zero weight vector for the second polarization, calculating a second weight matrix based on the weight vectors of the first weight matrix, and applying the first and second weight matrix to the dual-polarized array elements to generate a second beam covering the selected area.

Abstract: Multipoint wireless communications are coordinated in cells with radiation that is emanated from antennas in an inward direction. In an example embodiment, an apparatus includes a first antenna, a second antenna, a third antenna and a controller. The first antenna emanates radiation from a first location in an inwardly direction for a cell. The second antenna emanates radiation from a second location in an inwardly direction for the cell. The third antenna emanates radiation from a third location in an inwardly direction for the cell. The controller coordinates the emanation of the radiation via the first, second, and third antennas so as to reduce intra-cell interference for remote terminals located within the cell. The coordination may be effected in accordance with one or more coordinated multi-point (transmission/reception) (CoMP) techniques. Different numbers of sub-cells and antennas per cell and different CoMP cell organizations may be implemented.

Abstract: The present invention relates to a system for wireless communication comprising a first transceiver circuitry (BS) connected to a plurality of virtual antenna ports of an antenna arrangement; each virtual antenna port is a combination of one or more physical antenna ports. The first transceiver circuitry (BS) is configured to: communicate with a second transceiver circuitry (UE) via the antenna ports of the antenna arrangement; receive primary beamshaping information related to a first link (Downlink) between the first transceiver circuitry (BS) and the second transceiver circuitry (UE); determine secondary beamshaping information related to a second link (Uplink) between the second transceiver circuitry (UE) and the first transceiver circuitry (BS); and apply at least one weight vector based on the primary and secondary beamshaping information for subsequent transmission of signals from the first transceiver circuitry (BS) via the plurality of virtual antenna ports of the antenna arrangement.

Abstract: A wireless communication system comprising at least one base station in a communication cell, wherein the base station is equipped with at least one array antenna comprising at least two antenna ports which are connected to respective at least two corresponding antenna elements, wherein at least two of the at least two antenna elements have essentially the same polarization. The array antenna is arranged for communication via at least two antenna radiation lobes, each antenna radiation lobe communicating an information stream to at least one user equipment (UE) in the cell, wherein each antenna radiation lobe is individually controllable both in azimuth and elevation, whereby the communication of the information streams is optimized.

Abstract: An antenna arrangement (200, 300, 400) with antenna units (220, 230) comprising an input port (201, 202), a power divider (202, 204) for dividing an input signal into a major and a minor part with a ratio 11, a network (211, 216) with a sum input port, a difference input port, and first and second output ports, first (215, 217) and second antenna (214, 218) elements of a first and a second polarization. Signals to the sum input port are output with a first relation between them and signals to the difference input port are output with a second phase relation. The antenna units are arranged so that the major part of an input signal is connected to the sum port of a network and the minor part of an input signal is connected to the difference port of another network, and the first and second output ports of a network are connected to first and second adjacent antenna elements of the same polarization.

Abstract: A base station repeater station pair, comprising: a base station (1) having an input for a broadcast signal (s(t)) and being arranged to transmit, in use, a transfer signal over a link (3) using electromagnetic (EM) radiation; and a repeater station (2) arranged to receive, in use and through EM radiation, the transfer signal from the base station (1) and from the transfer signal broadcast the broadcast signal using EM radiation, in which the link (3) between the base station (1) and the repeater station (2) over which the transfer signal is passed in use comprises a dual polarized link, whereby the base station (1) is arranged to transmit the transfer signal over the link (3) with two different polarizations, and the repeater station (2) is arranged to receive the transfer signal from the link as two differently polarized versions. Also disclosed area base station and a method of using the above.

Abstract: The present invention relates to a wireless communication node (20A) adapted to via feeder ports be connected to antenna ports. It comprises signal handling and estimating means (21A) adapted to collect signals from a mobile station and to generate a plurality of channel estimates, connection combination information holding means (22A) adapted to hold information about all possible feeder port-antenna port connections, processing means (24A) comprising channel modelling means (23A) adapted to provide a channel model for the received signals.

Abstract: A method of and a precoding device and a communication device for precoding transmit data signals in a wireless Multiple-Input Multiple-Output, MIMO, channel transmission scheme for maximizing channel capacity of the MIMO system given available amounts of transmit power. The precoding is expressed in a complex precoding matrix (W), which is calculated involving individual transmit power constraints of the multiple outputs (71, . . . , 7t) of the MIMO channel. The individual transmit power constraints are comprised of predetermined individual output transmit power amplifier (PA1, . . . , PAt) limitations.

Abstract: The present invention relates to a system for changing the radiation pattern shape of an antenna array during electrical tilting. The antenna array has multiple antenna elements, and the system comprises a phase-shifting device provided with a primary port configured to receive a transmit signal, and multiple secondary ports configured to provide phase shifted output signals to each antenna element. The system further comprises a phase-taper device that changes phase taper over the antenna elements, and thus the beam shape, with tilt angle ?. The invention is adapted for use in down-link as well as up-link within a wireless communication system.

Abstract: The present invention relates to an antenna comprising multiple array elements with a first and second feeding point, each associated with orthogonal polarizations, each array element has a first and second phase centre each associated with the orthogonal polarizations, the first and second phase centres of said array elements are arranged in at least two columns, and one antenna port connected to the first and second feeding points of at least two array elements with first phase centre and second phase centre arranged in the at least two columns via a respective feeding network. The feeding network comprises a beam forming network having a primary connection, connected to the antenna port, and at least four secondary connections. The beam forming network divides power between the first feeding point and the second feeding point and controls phase shift differences between the respective feeding points with phase centre arranged in different columns.

Abstract: The present invention relates to a method of generating two beams, having orthogonal polarizations, covering a selected area using an antenna (20) comprising multiple dual-polarized array elements (11). Each dual-polarized array element having a first phase centre (18) associated with a first polarization and a second phase centre (18) associated with a second polarization. The method comprises: designing a first weight matrix having a first non-zero weight vector for the first polarization and a second non-zero weight vector for the second polarization, calculating a second weight matrix based on the weight vectors of the first weight matrix, and applying the first and second weight matrix to the dual-polarized array elements to generate a second beam covering the selected area.

Abstract: An antenna arrangement (200, 300, 400) with antenna units (220, 230) comprising an input port (201, 202), a power divider (202, 204) for dividing an input signal into a major and a minor part with a ratio 11, a network (211, 216) with a sum input port, a difference input port, and first and second output ports, first (215, 217) and second antenna (214, 218) elements of a first and a second polarization. Signals to the sum input port are output with a first relation between them and signals to the difference input port are output with a second phase relation. The antenna units are arranged so that the major part of an input signal is connected to the sum port of a network and the minor part of an input signal is connected to the difference port of another network, and the first and second output ports of a network are connected to first and second adjacent antenna elements of the same polarization.

Abstract: A wireless communication system comprising at least one base station in a communication cell, wherein the base station is equipped with at least one array antenna comprising at least two antenna ports which are connected to respective at least two corresponding antenna elements, wherein at least two of the at least two antenna elements have essentially the same polarization. The array antenna is arranged for communication via at least two antenna radiation lobes, each antenna radiation lobe communicating an information stream to at least one user equipment (UE) in the cell, wherein each antenna radiation lobe is individually controllable both in azimuth and elevation, whereby the communication of the information streams is optimized.

Abstract: The present invention relates to a system for wireless communication comprising a first transceiver circuitry (BS) connected to a plurality of virtual antenna ports of an antenna arrangement; each virtual antenna port is a combination of one or more physical antenna ports. The first transceiver circuitry (BS) is configured to: communicate with a second transceiver circuitry (UE) via the antenna ports of the antenna arrangement; receive primary beamshaping information related to a first link (Downlink) between the first transceiver circuitry (BS) and the second transceiver circuitry (UE); determine secondary beamshaping information related to a second link (Uplink) between the second transceiver circuitry (UE) and the first transceiver circuitry (BS); and apply at least one weight vector based on the primary and secondary beamshaping information for subsequent transmission of signals from the first transceiver circuitry (BS) via the plurality of virtual antenna ports of the antenna arrangement.

Abstract: A base station repeater station pair, comprising: a base station (1) having an input for a broadcast signal (s(t)) and being arranged to transmit, in use, a transfer signal over a link (3) using electromagnetic (EM) radiation; and a repeater station (2) arranged to receive, in use and through EM radiation, the transfer signal from the base station (1) and from the transfer signal broadcast the broadcast signal using EM radiation, in which the link (3) between the base station (1) and the repeater station (2) over which the transfer signal is passed in use comprises a dual polarised link, whereby the base station (1) is arranged to transmit the transfer signal over the link (3) with two different polarisations, and the repeater station (2) is arranged to receive the transfer signal from the link as two differently polarised versions. Also disclosed area base station and a method of using the above.

Abstract: The present invention relates to a solution for efficient handling of radio resources in communication devices in a wireless communication network. In the solution a subset of available antennas to be used is chosen using a method for determining a singular valued metric from a sub matrix related to a full channel matrix. Sub-channel matrices are chosen by deducing the metric and comparing to other sub-matrices. Preferably the best sub-channel matrix is used to determine a suitable full channel matrix to use in communication and this full channel matrix is communicated to each involved communication device.

Abstract: A method of and a precoding device and a communication device for precoding transmit data signals in a wireless Multiple-Input Multiple-Output, MIMO, channel transmission scheme for maximizing channel capacity of the MIMO system given available amounts of transmit power. The precoding is expressed in a complex precoding matrix (W), which is calculated involving individual transmit power constraints of the multiple outputs (71, . . . , 7t) of the MIMO channel. The individual transmit power constraints are comprised of predetermined individual output transmit power amplifier (PA1, . . . , PAt) limitations.