A device comprises antennas and a signal processor, and each antenna comprises antenna elements. The signal processor is configured to: receive an input signal for a multiple-input multiple-output (MIMO) operation; generate complex weights; generate feed signals based on the input signal and the complex weights; and provide the feed signals to the antenna elements so that the MIMO operation uses at least two antenna elements from two different antennas.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Embodiments of the present disclosure relate to a method and device for beam forming. In example embodiments, a plurality of signals are obtained from a plurality of receiving antennas. The plurality of signals are grouped into a first and second set of signals. An automatic gain control (AGC) is disabled for each signal in the first set of signals, and the AGC has been enabled for each signal in the second set of signals. Then, for beam forming associated with the plurality of receiving antennas, beam weights are determined by applying a first set of signal weights to the first set of signals and applying a second set of signal weights to the second set of signals. The first set of signal weights are greater than the second set of signal weights. In this way, negative effects due to the AGC processing may be mitigated in the beam forming.

Provided are a method and device for transmitting and receiving a signal in a wireless communication system. In a wireless communication system according to an embodiment of the present disclosure, a radio unit (RU) is configured to obtain channel information about a plurality of reception paths of the RU, through which signals of at least one user equipment (UE) are received, with respect to each UE, determine a combined weight based on the channel information by using preset mapping information according to the number of the plurality of reception paths and the number of combined paths that are combined from the plurality of reception paths, and transmit a combined signal to a digital unit (DU) through the combined paths, the combined signal being generated as a result of combining the signals received through the plurality of reception paths according to the determined combined weight.

A wireless communication device for transceiving signals by using carrier aggregation is provided. The wireless communication device includes a first antenna configured to transmit a first signal to an outside of the wireless communication device or receive a second signal from the outside; a first transmitter connected to the first antenna via a first node and configured to generate the first signal by combining plural transmitting carrier signals received over a plural transmitting carriers; and a first receiver connected to the first antenna via the first node and configured to divide the second signal into a plural receiving carrier signals received over a plural receiving carriers. The first receiver includes a first receiving amplifier commonly connected to a plural carrier receivers configured to amplify the second signal received from the first antenna and to divide the receiving carrier signals, respectively.

The present disclosure discloses a method and device for wireless communication in a user equipment and base station. The user equipment receives first information and sends first radio signal. The first radio signal carries a first bit block, the first bit block being used to determine R, L first vectors and R second type parameter group(s); the R is used to determine the L from P candidate integers; the first information is used to determine the P candidate integers; each second type parameter group of the R second type parameter group(s) comprises L2 second type parameters, the L2 being equal to the L multiplied by 2; R3 second type parameter group(s) in the R second type parameter group(s) is(are) respectively used with the L first vectors to generate R3 merge vector(s); the P is a positive integer greater than 1; the R (greater than R3) and R3 are positive integers.

There is provided mechanisms for processing uplink signals. A method is performed by a RRU (200). The method comprises obtaining uplink signals (S102) as received from wireless devices at antenna elements of an antenna array of the RRU (200), wireless device being associated with its own at least one user layer. The method comprises capturing (S104) energy per user layer by combining the received uplink signals from the antenna array for each user layer into combined signals, resulting in one combined signal per user layer. The combining for each individual user layer is based on channel coefficients of the wireless device associated with said each individual user layer. The method comprises providing (S106) the combined signals to a BBU (300).

The wireless communications system comprises: a plurality of remote units, wherein each remote unit is configured to convert a respective RF signal into a plurality of time and frequency samples, perform a noise estimation corresponding to the plurality of time and frequency samples, compute a plurality of coefficients corresponding to the plurality of time and frequency samples that have an amplitude greater than at least a predefined threshold value, and multiply each of the plurality of coefficients by its corresponding time and frequency sample to create a plurality of weighted time and frequency samples; at least an intelligent switching unit, coupled to the plurality of remote units, wherein the intelligent switching unit is configured to receive the plurality of weighted time and frequency samples from each of the plurality of remote units, temporally align the pluralities of weighted time and frequency samples, compute a set of weighted sums of time and frequency samples and transmit the set of weighted sums of time and frequency samples; and a baseband processing unit coupled to the intelligent switching unit and configured to receive the set of weighted sums of time and frequency samples, and compute a remaining portion of baseband protocol stack processing on the set of weighted sums of time and frequency samples.

Aspects of the present disclosure provide techniques for using cyclic-shifts in code division multiplexing to shift transmitted signals (e.g., reference signals, control signals, and/or data) from different antenna ports of the transmitting device. Particularly, for multiple-input multiple-output (MIMO) systems that multiply the capacity of a radio link by using multiple transmit and receive antennas to exploit multipath propagation, aspects of the present disclosure minimize interference at the receiving device by separating the signals from different antenna ports based on the channel impulse response (or delay spread) of each antenna port of the channel. In some examples, the transmitting device may maximize resource utilization by interleaving the reference signals, control signals, and/or data from a plurality of antenna ports while maintaining adequate spacing between each signal.

Embodiments of the present disclosure relate to a method and device for beam forming. In example embodiments, a plurality of signals are obtained from a plurality of receiving antennas. The plurality of signals are grouped into a first and second set of signals. An automatic gain control (AGC) is disabled for each signal in the first set of signals, and the AGC has been enabled for each signal in the second set of signals. Then, for beam forming associated with the plurality of receiving antennas, beam weights are determined by applying a first set of signal weights to the first set of signals and applying a second set of signal weights to the second set of signal weights. The first set of signal weights are greater than the second set of signal weights. In this way, negative effects due to the AGC processing may be mitigated in the beam forming.