The invention is directed to systems, methods and computer program products for determining an operational mode for a device in a network. An exemplary method comprises determining a device has a first antenna and a second antenna; determining a first number of multipath components and associated power levels for the first antenna; determining a second number of multipath components and associated power levels for the second antenna; and determining an operational mode for the device based on the first number of multipath components and its associated power levels for the first antenna and the second number of multipath components and its associated power levels for the second antenna.

Apparatus and methods for multi-antenna communications are provided. In certain embodiments, a communication system includes an antenna array including a plurality of antenna elements, and a plurality of RF circuit channels each coupled to a corresponding one of the antenna elements. The plurality of RF circuit channels generate two or more analog baseband signals in response to the antenna array receiving a radio wave. The communication system further includes a controllable amplification and combining circuit that generates two or more amplified analog baseband signals based on amplifying each of the two or more analog baseband signals with a separately controllable gain, and that combines the two or more amplified analog baseband signals to generate a combined analog baseband signal.

A receiver including a plurality of primary antennas configured to receive a plurality of first carrier signals corresponding to at least a first frequency band; a plurality of diversity antennas configured to receive a plurality of second carrier signals corresponding to at least a second frequency band; a first local oscillator configured to generate a first oscillation signal; a first load circuit pair connected to the first local oscillator, and configured to frequency down-convert at least one of the plurality of first carrier signals, and having a first load circuit and a second load circuit adjacent to the first load circuit; and a second load circuit pair connected to the first local oscillator, configured to frequency down-convert at least of the plurality of second carrier signals, and having a third load circuit and a fourth load circuit adjacent to the third load circuit.

Methods and apparatus for adaptively adjusting receiver operation for e.g., power optimization. In one embodiment, operation during diversity operation is adaptively adjusted. Diversity techniques consume significantly more power than non-diversity operation. However, the performance gain from receiver diversity is not always predictable. Consequently, in one embodiment, a device evaluates the overall performance gain contributed by diversity operation and, where the performance gain is insignificant or inadequate, the device disables diversity operation. In one implementation, the device can operate in a static single antenna mode, a dynamic single antenna mode and a dynamic multiple antenna mode.

An antenna adjusting method includes: transmitting a first broadcast message in a case that a plurality of antennae are in a SISO mode, and acquiring radiation efficiencies of the plurality of antennae; and maintaining the SISO mode in a case that the radiation efficiency of at least one of the plurality of antennae is less than a preset threshold.

To improve throughput and communication quality in radio communication by flexibly controlling UL transmission and DL transmission, a user terminal according to one aspect of the present invention is a user terminal that communicates with a radio base station using a downlink subframe for enabling a first downlink signal to be received, and an uplink subframe for enabling an uplink signal to be transmitted, and is characterized by having a transmission section that transmits an uplink signal using a predetermined radio access scheme in an uplink subframe, a reception section that receives a second downlink signal transmitted using the predetermined radio access scheme in an uplink subframe, and a control section that selects a transmission mode applied to the second downlink signal from a transmission mode applicable to the first downlink signal and a transmission mode applicable to the uplink signal to control reception processing.

Apparatus and methods for multi-antenna communications are provided. In certain embodiments, a communication system includes an antenna array including a plurality of antenna elements, and a plurality of RF circuit channels each coupled to a corresponding one of the antenna elements. The plurality of RF circuit channels generate two or more analog baseband signals in response to the antenna array receiving a radio wave. The communication system further includes a controllable amplification and combining circuit that generates two or more amplified analog baseband signals based on amplifying each of the two or more analog baseband signals with a separately controllable gain, and that combines the two or more amplified analog baseband signals to generate a combined analog baseband signal.

The present disclosure relates to methods and arrangements for introducing a beam sweep measurement window comprising one or more measurement instants. When performed in a wireless device, the method comprises receiving (S61) one or more beams, each comprising at least one control signal comprising beam sweep properties and obtaining (S62) the beam sweep properties from the control signal. The method further comprises determining (S63), based on the obtained beam sweep properties, a beam sweep measurement window comprising one or more measurement instants.

A method performed by a wireless device for handling two or more beamformed communication links initialized with one or more network nodes in a wireless communications network is provided. The wireless device determines at least one compatibility state for the two or more beamformed communication links based on one or more current radio signal characteristics at the wireless device for the two or more beamformed communication links, wherein the at least one compatibility state indicates if the wireless device currently is able to simultaneously receive transmission beams of the two or more beamformed communication links or not. The wireless device transmits information indicating the at least one determined compatibility state for the two or more beamformed communication links to at least one of the one or more network nodes. A wireless device as well as a network node and method of operation thereof are also disclosed.

This disclosure provides systems, methods, and apparatuses for wireless communication. In some aspects, a user equipment (UE) may enable adaptive receive diversity (RxD) by receiving an indicator for a channel occupancy time (COT), outside of the COT and in a non-RxD mode, and may transfer to the RxD mode for reception during the COT. After an end to the COT, the UE may return to the non-RxD mode. In this way, the UE enables improved power gain, diversity gain, or spatial nulling gain during a COT, and enables reduced power utilization outside of the COT.