An antenna adaptation is provided for a communication node as controlled by an antenna adaptation command. The antenna adaptation command adjusts the number of active transmit antennas and/or the number of active receive antennas in the communication node such as for reducing interference at the communication node.

All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.

This invention is a transmission device capable of enhancing the reception characteristics of a terminal when employing transmit diversity using two antenna ports in an ePDCCH. In a base station (100) that transmits a reference signal to a terminal (200) using two antenna ports, a setting unit (102), on the basis of the reception quality of the terminal, sets as the aforementioned two antenna ports either a first antenna port pair for which DMRS (reference signals) do not undergo mutual code multiplexing, or a second antenna port pair for which the DMRS do undergo code multiplexing. A transmitter (109) transmits the DMRS from the two antenna ports set in the setting unit (102).

All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.

A multiple-input multiple-output (MIMO) wireless transceiver with “N” transmit and receive chains and a bandwidth evaluation circuit, a chain partitioning circuit and a switchable radio frequency ‘RF’ filter bank. The bandwidth evaluation circuit evaluates both the utilization of the WLAN(s) and any remaining communications channels and determines whether to operate the MIMO chains synchronously as a single radio or asynchronously as multiple radios. The chain partitioning circuit either partitions subsets of the MIMO chains for asynchronous operation as distinct radios or combines all MIMO chains for synchronous operation as a single radio. The switchable RF filter bank is responsive to a partitioning of subsets of the chains into distinct radios to add RF filters to a RF portion of the chains to isolate each radio from one another, and responsive to a combining of all MIMO chains into a single radio to remove all RF filters.

The present disclosure relates to a pre-5.sup.th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4.sup.th-Generation (4G) communication system such as Long Term Evolution (LTE). According to various embodiments, a device of a terminal, in a wireless communication system, can comprise at least one processor and at least one transceiver operatively coupled to the at least one processor. The at least one transceiver configured to receive, from a base station, a first signal transmitted using a first beam of the base station and including system information and receive, from the base station, a second signal transmitted using a second beam of the base station and including the system information, and the at least one processor is configured to decode the second signal in combination with the first signal, thereby enabling the system information to be acquired.

A communication apparatus capable of wireless communication with another communication apparatus via a first communication path and a second communication path sets a directivity of an antenna to a first directivity capable of wireless communication via the first communication path and receives data from the another communication apparatus via the first communication path. When the communication apparatus sends an acknowledgement signal to the another communication apparatus via the first communication path in response to reception of the data, the communication apparatus sets the directivity of the antenna to a second directivity capable of wireless communication via the first communication path and wireless communication via the second communication path for a set period thereafter.

The present disclosure discloses an adaptive MIMO detection method and system. The method includes the following steps: a) determining whether a Signal to Noise Ratio of a data packet is greater than a set threshold for Signal to Noise Ratio, and if yes, performing ZF preprocessing on the channel matrix, and if not, performing MMSE preprocessing on the channel matrix; b) performing sorted QR decomposition on the channel matrix processed in step a) to obtain a plurality of decomposition matrices; c) determining whether a condition number of the channel matrix of the data packet is greater than a set threshold for condition number of the channel, and if yes, Lattice Reduction is performed on the decomposition matrices obtained in step b); d) determining whether an estimated value of an interference term of the channel matrix is greater than a threshold for the estimated value of the interference term of the channel matrix, and if yes, SIC detection mode is selected for MIMO detection on the data packets, and if not, K-best detection mode is selected for MIMO detection on the data packets; and e) according to processing results from steps a) to d), performing MIMO detection on the data packet.

A method for antenna selection, performed by a user equipment, UE, in a wireless communication system includes determining signal performance of a signal received by the UE. The signal is received by an array antenna of the UE for communication with a network node of the wireless communication system. The method includes determining a signal decay rate associated with the signal performance of the signal, and replacing the array antenna with an omni-directional antenna of the UE for communication with the network node, based on the signal decay rate. Related devices are also described.

A receiver system (100) comprising: a plurality of receiver-input-terminals (102), each of which is configured to receive an input-signal from a respective antenna (106), wherein the input-signals comprise: i. one or more undesired-signal-components; and ii. one or more combined-signal-components. The receiver system (100) also includes a spatial-information-processing-block (112; 212) configured to: calculate spatial information (222) of the undesired-signal-components of the plurality of input-signals; calculate spatial information (220) of the combined-signal-components of the plurality of input-signals; calculate weighting-coefficients (226) for each of the input-signals based on the spatial information (220) of the combined-signal-components and the spatial information (222) of the undesired-signal-components; and combine the plurality of input-signals by applying the weighting-coefficients to each of the input-signals to provide a spatial-output-signal (114; 214). The receiver system (100) further includes a signal-combiner (130) configured to combine a plurality of signal-processing-path-output-signals (110) with the spatial-output-signal (114; 214) in order to provide a receiver-output-signal (108).