Abstract: A system is disclosed that includes a base station having a plurality of antennas a control unit which analyses pilot signals received from the terminal device at the plurality of antennas to obtain information about a wireless channel property of the wireless channel between the terminal device and the plurality of antennas. According to a method, a plurality of pilot signals is transmitted from the terminal device to the base station, and information about the wireless channel property of the wireless channel between the terminal device and the plurality of antennas of the base station is determined based on a predefined number of last recently transmitted pilot signals of the plurality of pilot signals from the terminal device. Based on the information about the wireless channel property, at least one parameter of the plurality of antennas is configured by the base station.

Abstract: The present disclosure relates to a method for operating a base station of a wireless communication network. Precoding information for concentrating a radio-frequency power of a transmitted radio-frequency signal to a group of terminal devices arranged in a sub area of a coverage area of the base station is determined and applied to an antenna array of the base station. A synchronization signal is transmitted from the base station to the group of terminal devices using the precoding information.

Abstract: Pulse signal transmission, such as radar pulses or the like are used in a high frequency mobile communication network as a means for determining or assisting in determining the likely presence of User Equipment (UE) and/or tracking UE in a predetermined area. As a result of determining the likely presence of UE and/or tracking UE, such information may be used to expedite either a handover or establish re-connection within the communication network. In this regard, more targeted beam sweeps or more frequent sweeps can be made in the direction where the UE has been determined to likely be present in order to hasten the establishment of the communication link between the targeted transmission point, such as a Base Station (BS) or the like, or reconnection to the existing transmission point.

Abstract: A device controls each antenna to transmit at least one first UL pilot signal and to receive, for each first UL pilot signals DL data encoded according to the respective first UL pilot signal. The receive properties of the DL data are combined and a second UL pilot signal is determined based on the combined receive properties. The second UL pilot signal is repeatedly transmitted. The techniques may be applied in a massive multi-input multi-output scenario.

Abstract: The present invention relates to a method (300) for operating a user equipment (106) in a wireless radio network (100). The wireless radio network (100) comprises a base station (101) and at least one node (105) configured to relay communication data between the user equipment (106) and the base station (101). According to the method, a relayed communication state is determined (301) and a measurement of characteristics of further direct radio transmission links between the user equipment (106) and the wireless radio network (100) is initiated (302) depending on the relayed communication state.

Abstract: A sequence of downlink synchronization signals is transmitted to a device using a plurality of propagation channels. The plurality of propagation channels is selected according to an at least partly random pattern.

Abstract: Multi-beam multiplexing in mobile radio communication networks, specifically for initial network access transmissions, such as Random Access Channel (RACH) transmissions and other initial network access signals that affect the operation of the Random Access operation. A network node is configured to distribute, simultaneously, a plurality of beams across a predetermined coverage area. Each of the beams are associated with a different coverage area. In addition, a plurality of sub-carriers are precoded in an OFDM modulated signal, which includes control information, for the purpose of shaping (i.e., beamforming) each of the plurality of beams. In this regard, one or more sub-carriers are mapped to a beam.

Abstract: A wireless communication system includes a first communication device having an antenna arrangement configured to adjust the polarization of a radio frequency signal to be transmitted via the antenna arrangement, and a second communication device. A first downlink pilot signal having a first polarization and a second downlink pilot signal having a second polarization are sent via the antenna arrangement of the first communication device. The downlink pilot signals are orthogonal to each other and the polarizations are different. The downlink pilot signals are received at an antenna arrangement of the second communication device. A combined power of the received downlink pilot signals is optimized by varying a combining information. The combined power is a function of the received downlink pilot signals and the combining information. The antenna arrangement of the first communication device is adjusted based on the combining information.

Abstract: A radio device transmits outgoing radio signals on a carrier frequency to a further radio device and receives incoming radio signals on the same carrier frequency from the further radio device. The radio device switches at least between a first antenna configuration and a second antenna configuration, e.g., by using a switch. In the first antenna configuration, the outgoing radio signals are transmitted via at least one first antenna while simultaneously the incoming radio signals are received via at least one second antenna. In the second antenna configuration, the outgoing radio signals are transmitted via the at least one second antenna while simultaneously the incoming radio signals are received via the at least one first antenna.

Abstract: A cellular multiple-input and multiple-output, MIMO, system comprises a base station having a plurality of antennas. Pilot signals are received by the base station in each frame of a sequence of frames (60). The base station analyzes the pilot signals to determine radio channel properties of radio channels between respectively each one of a plurality of terminals and the base station. The sequence of frames (60) comprises frames of a first frame type (61, 63, 64, 68) and frames of a second frame type (62, 69). Each frame of the second frame type (62, 69) have a greater number of time slots in which the base station receives the pilot signals than each frame of the first frame type (61, 63, 64, 68). The frames of the second frame type (62, 69) are included periodically in the sequence of frames (60).

Abstract: A user equipment (2, 4, 6) receives mobility information representing a time-dependent location change of a mobile cell (11, 21) of a cellular communication network. A cell of a plurality of cells (11, 21, 31) of cellular communication network is selected for the user equipment (2, 4, 6) to camp on. Selecting the cell comprises processing the mobility information to determine whether the user equipment (2, 4, 6) is to camp on the mobile cell (11, 21).

Abstract: The invention is directed to systems, methods, and computer program products for determining timing relationships of pilot and data in mobile network communications. Specifically, an uplink (UL) transmission is received at a base station (BS) from a user equipment (UE) in network communication with the BS via a communication channel. Based on the UL transmission, a channel coherence time is determined indicating a period of time during which the communication channel is considered to be substantially unchanged. In response, a total transmission duration is determined based on the channel coherence time indicating a period of time associated with transmission of a data frame.

Abstract: The present application relates to a method for operating a wireless communication system (10). The communication system (10) comprises a first communication device (20) having an antenna arrangement (22) configured to adjust the polarisation of a radio frequency signal to be transmitted via the antenna arrangement (22), and a second communication device (30). According to the method, a first downlink pilot signal (301) having a first polarisation is sent via the antenna arrangement (22) of the first communication device (20). A second downlink pilot signal (302) having a second polarisation is sent via the antenna arrangement (22). The first and second downlink pilot signals are orthogonal to each other and the first and second polarisations are different. The first and second downlink pilot signals are received at an antenna arrangement (32, 33) of the second communication device (30).

Abstract: The present invention relates to a method for transmitting data between a user equipment (15) and a base station (11) in a wireless radio network (10). The user equipment (15) comprises at least a first antenna (16) and a second antenna (17). The base station (11) comprises a plurality of antennas (12) for transmitting radio frequency signals between the base station (11) and the user equipment (15). According to the method, a first training signal is transmitted from the user equipment (15) to the base station (11) via the first antenna (16) at a first time period. Furthermore, a second training signal is transmitted from the user equipment (15) to the base station (11) via the second antenna (17) at a second time period different to the first time period. For each antenna (12) of the base station (11) a corresponding first configuration parameter is determined based on the first training signal and a corresponding second configuration parameter is determined based on the second training signal.

Abstract: Determining the location of a body area network enabled device on a user's body and using the location information to determine whether to send instructions or data to the device over the body area network, includes integrating an EMG sensor into a device that is wearable or otherwise meant to be in contact with or close proximity to an intended area of a user's body. The integrated EMG sensor may detect the electrical potential of the user's body at the point of contact. Variance of electrical potential across the user's body may be used to determine information regarding the location of the sensor, and thus, the location of the device on the user's body. The location of the device, in turn, may be used to determine whether to send instructions or data to the device over the body area network.

Abstract: Operating a cellular multiple-input and multiple-output system including a first device having an antenna array having a plurality of antennas, and a second device having at least two antennas includes a same uplink pilot signal broadcast from each antenna of the second device, and received at the antenna array of the first device. Depending on the received same uplink pilot signal, a first set of first device receiving parameters for the antenna array is determined. From each antenna of the at least two antennas of the second device, a corresponding uplink pilot signal is sent and received at the antenna array of the first device using the first set of first device receiving parameters. At the first device, for each received uplink pilot signal, a corresponding second set of first device receiving parameters is determined depending on the plurality of received orthogonal uplink pilot signals.

Abstract: A method for adjusting an antenna configuration of the terminal device (30) in a cellular communication system (10). The system (10) includes a base station (20) and a terminal device (30) having a plurality of antenna elements (40-43). In the terminal device (30) a plurality of preset antenna configurations is provided. Each antenna configuration defines at least one reception parameter for the plurality of antenna elements (40-43). For each antenna configuration of the plurality of preset antenna configurations the antenna configuration is applied to the plurality of antenna elements (40-43) and a reception characteristic of a signal transmission from the base station (20) is determined. Based on the plurality of reception characteristics one antenna configuration is selected and applied to the plurality of antenna elements (40-43) for further signal transmissions.

Abstract: Embodiments are directed to systems, methods and computer program products for pilot time slot hopping to mitigate interference-based pilot time slot contamination. Embodiments include generating a multiple input multiple output (MIMO) system message frame structure comprising a header comprising a plurality of header time slots, an uplink (UL) time slot (optional), and a downlink (DL) time slot. Generating includes determining, based on a predetermined scheme, allocation of at least one of the plurality of header time slots to at least one user device within a predetermined area.

Abstract: The present invention relates to a method for operating a wireless communication system. The wireless communication system comprises a base station and a terminal. The terminal comprises a plurality of antenna elements and provides at least two antenna array configurations comprising a first antenna array configuration comprising at least two antenna elements having same radio transmission characteristics and a second antenna array configuration comprising at least two antenna elements having different radio transmission characteristics. According to the method, a selection process for selecting and an antenna array configuration of the at least two antenna array configurations is triggered and for each of the at least two antenna array configurations a corresponding figure of merit is determined. The corresponding figure of merit is determined based on corresponding pilot signals received from the base station via the corresponding antenna array configuration.

Abstract: A MIMO communication method of performing MIMO communication between a base station having a plurality of antennas and each of a plurality of terminals covered by the base station using uplink data slots and downlink data slots that are alternately placed on a time axis. The method includes, in the base station, despreading a received signal that is transmitted from each of the plurality of terminals demodulating the transmission data transmitted from a respective terminal on the basis of the value of the estimated channel; decoding a received signal included in the uplink data slots, estimating a current channel between each of all antennas of the base station and the respective terminal; and comparing the stored value of the estimated channel with a value of the estimated current channel and updating the stored value of the estimated channel to the value of the estimated current channel.