A MIMO test system is provided that performs non-cable-conducted, over-the-air radiated calibration and test modes of operations. A DUT is located in an anechoic chamber having a plurality of probe antennas disposed therein. During the calibration mode, the test instrument causes predetermined signals to be transmitted over a transmission channel comprising a non-cable-conducted, OTA interface between probe antennas of the chamber and antenna ports of the DUT and obtains measurements of received power and relative phase. The test instrument uses the measurements to construct a radiation channel matrix associated with the transmission channel and obtains an inverse matrix of the radiation channel matrix. During the test mode, the test system performs a non-cable-conducted, OTA radiated test during which the test instrument applies the inverse matrix to DUT performance measurements obtained by the test instrument to calibrate out the radiation channel matrix from the DUT performance measurements.

An electronic device is provided. The electronic device may include a plurality of antennas configured to transmit and receive a signal in a radio frequency (RF) frequency band; and an RF circuit configured to process the signal in the RF frequency band. The RF circuit includes a reception (Rx) path configured to transfer a first signal received through the plurality of antennas, a transmission (Tx) path configured to transfer a second signal to the plurality of antennas, and a coupler configured to transfer at least a part of the second signal obtained in the Tx path to the Rx path. The Tx path includes a power divider configured to distribute power to at least one antenna among the plurality of antennas, and the coupler is electrically connected to an input terminal of the power divider to be disposed before the power divider.

A wireless communication apparatus includes: a plurality of receivers provided so as to correspond to a plurality of respective antennas; a calibration transmitter; and a control unit configured to release, when a UL calibration is executed, connection between the antennas and the respective receivers, and determine a calibration weight to be applied to each of the receivers based on a UL calibration signal transmitted from the calibration transmitter and a UL calibration signal received by each of the receivers.

Provided is a node unit which is branch-connected to another communication node via a transport medium, the node unit comprising: a delay measurement unit which transmits a test signal for measuring a delay to an adjacent node unit of the branch-connected upper stage via the transport medium and detects a loopback signal to which the test signal is looped back via the adjacent node unit of the upper stage, thereby measuring an upper stage transmission delay between the adjacent node unit of the upper stage and the node unit; a delay summation unit which, when an adjacent node unit of the branch-connected lower stage exists, receives a lower stage transmission delay transmitted from the adjacent node unit of the lower stage, and calculates a summed transmission delay by summing the upper stage transmission delay and the lower stage transmission delay; and a control unit which transmits the summed transmission delay to the adjacent node unit of the upper stage.

The present disclosure relates to a 5th (5G) generation or pre-5G communication system for supporting a higher data transmission rate beyond a 4th (4G) generation communication system such as long term evolution (LTE). According to various embodiments of the present disclosure, an antenna module may include at least one transmission chain including a first mixer configured to up-convert a transmission signal into a radio frequency band; at least one frequency generator configured to generate at least one signal; and at least one switch configured to receive the at least one signal generated from the frequency generator, and to selectively deliver the at least one signal to the first mixer, the antenna element, the transmission chain, and the frequency generator.

The present disclosure relates to a 5th (5G) generation or pre-5G communication system for supporting a higher data transmission rate beyond a 4th (4G) generation communication system such as long term evolution (LTE). According to various embodiments of the present disclosure, an antenna module may include at least one transmission chain including a first mixer configured to up-convert a transmission signal into a radio frequency band; at least one frequency generator configured to generate at least one signal; and at least one switch configured to receive the at least one signal generated from the frequency generator, and to selectively deliver the at least one signal to the first mixer, the antenna element, the transmission chain, and the frequency generator.

An electronic device is provided. The electronic device includes a first antenna, a second antenna, a transmission/reception path unit, a first reception path unit, a second reception path unit including a low noise amplifier (LNA), a signal path selection unit configured to connect each of the first antenna and the second antenna to the transmission/reception path unit, the first reception path unit, or the second reception path unit, and a radio frequency integrated circuit (RFIC) module or a processor including the RFIC module configured to control the signal path selection unit to have a first state in which the first antenna is connected to the transmission/reception path unit and the second antenna is connected to the second reception path unit or control the signal path selection unit to have a second state in which the first antenna is connected to the first reception path unit and the second antenna is connected to the transmission/reception path unit.

An electronic device is provided. The electronic device includes a first antenna, a second antenna, a transmission/reception path unit, a first reception path unit, a second reception path unit including a low noise amplifier (LNA), a signal path selection unit configured to connect each of the first antenna and the second antenna to the transmission/reception path unit, the first reception path unit, or the second reception path unit, and a radio frequency integrated circuit (RFIC) module or a processor including the RFIC module configured to control the signal path selection unit to have a first state in which the first antenna is connected to the transmission/reception path unit and the second antenna is connected to the second reception path unit or control the signal path selection unit to have a second state in which the first antenna is connected to the first reception path unit and the second antenna is connected to the transmission/reception path unit.

The present invention relates to a communication node arrangement comprising at least two antenna units. Each antenna unit comprises at least one signal port and at least one antenna element, where each signal port is connected to at least one corresponding antenna element. Each antenna unit comprises at least one sensor unit arranged to sense its orientation relative a predetermined reference extension. The communication node arrangement comprises at least one control unit and is arranged to feed a respective test signal into each of at least two different signal ports. For each such test signal, the communication node arrangement is arranged to receive the test signal via at least one other signal port. The communication node arrangement being arranged to determine relative positions of said antenna units based on the received test signals, and to determine relative orientations of said antenna units based on data received from the sensor units.

The present invention relates to a communication node arrangement comprising at least two antenna units. Each antenna unit comprises at least one signal port and at least one antenna element, where each signal port is connected to at least one corresponding antenna element. Each antenna unit comprises at least one sensor unit arranged to sense its orientation relative a predetermined reference extension. The communication node arrangement comprises at least one control unit and is arranged to feed a respective test signal into each of at least two different signal ports. For each such test signal, the communication node arrangement is arranged to receive the test signal via at least one other signal port. The communication node arrangement being arranged to determine relative positions of said antenna units based on the received test signals, and to determine relative orientations of said antenna units based on data received from the sensor units.