A method for synchronizing a user equipment (UE) is provided. The method includes determining a first beam identifier associated with a transmission beam conveying a first received beamformed synchronization signal, determining if a first synchronization cycle is complete, and based on the first synchronization cycle not being complete, repeating the determining the first beam identifier, and the determining if the first synchronization cycle is not complete until the first synchronization cycle is complete.

The present invention relates to a wireless communication method and a wireless communication terminal for signaling a multi-user packet. More specifically, provided are a wireless communication terminal including a communication unit; and a processor configured to process signals transmitted and received through the communication unit, wherein the processor receives, through the communication unit, a high efficiency multi-user PHY protocol data unit (HE MU PPDU), wherein a preamble of the HE MU PPDU includes high efficiency signal A field (HE-SIG-A) and high efficiency signal B field (HE-SIG-B), and decodes the received HE MU PPDU based on information obtained from the HE-SIG-A, wherein a configuration of the HE-SIG-B is identified based on information obtained from at least one subfield of the HE-SIG-A and a wireless communication method using the same.

Methods, systems, and devices for wireless communications are described. In some cases, a user equipment (UE) may use multiple antenna ports to communicate with multiple transmission/reception points (TRPs), and each antenna port may correspond to a spatial dimension along which wireless communications may be transmitted. The UE may transmit a first sounding reference signal (SRS) to a serving TRP to aid the serving TRP in determining a subset of spatial dimensions available to the UE along which to transmit downlink transmissions. Upon receiving a downlink transmission from the serving TRP along the subset of spatial dimensions as determined by the serving TRP, the UE may transmit a second SRS to a neighboring TRP to indicate the subset of spatial dimensions. The neighboring TRP avoid transmitting downlink transmissions to the UE or to other UEs along the subset of spatial dimensions, thereby mitigating interference along the subset of spatial dimensions.

A satellite communications apparatus including an antenna assembly having: a directional antenna arranged to receive signals from and transmit signals to a satellite, an electronic motor arranged to adjust at least one of a position and orientation of the directional antenna; and a sensor arranged to detect the position and orientation of the directional antenna. An RF interface, in communication with the antenna, is arranged to receive the received signals from the directional antenna. A controller, in communication with the RF interface, is arranged to: i) measure a gain associated with the received signals during a first time interval, ii) receive the detected position and orientation of the directional antenna during the first time interval, and iii) send a control signal to the electronic motor to adjust the position and orientation of the directional antenna to limit a decrease in the measured gain to less than a threshold.

Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, systems and methods for a link margin procedure that accommodates reporting link parameters, such as link margin, for multiple streams.

This application discloses a tag quantity estimation system and method of RFID. A processor-readable medium was disclosed at the same time. This estimation method applies a spatial diversity gain existing in a multi-antenna system. Separated and sequentially stacked the real parts and the imaginary parts of the multiple signals received by multiple antennas. Then, a tag quantity estimation problem is converted into a data clustering problem in high-dimensional space. In this way, the overlapped cluster data in low-dimensional space can be separated in the high-dimensional space, thereby improving the accuracy of tag quantity estimation.

An interaction method and a communication device are provided. An interaction method comprises sending multiple different signals in different directions by a communication device, wherein the signals have different coverage areas, at least determining at least two signals in the signals received by another communication device, and at least according to the at least two signals, executing a corresponding command, enabling an interaction solution.

The present invention relates to a wireless communication method and a wireless communication terminal for signaling a multi-user packet. More specifically, provided are a wireless communication terminal including a communication unit; and a processor configured to process signals transmitted and received through the communication unit, wherein the processor receives, through the communication unit, a high efficiency multi-user PHY protocol data unit (HE MU PPDU), wherein a preamble of the HE MU PPDU includes high efficiency signal A field (HE-SIG-A) and high efficiency signal B field (HE-SIG-B), and decodes the received HE MU PPDU based on information obtained from the HE-SIG-A, wherein a configuration of the HE-SIG-B is identified based on information obtained from at least one subfield of the HE-SIG-A and a wireless communication method using the same.

A system for trans-horizon tropospheric-based wireless communication is provided. The system provides high availability and capacity as compared to a line-of-sight (LOS) standard microwave radio link while using very low height antenna towers. The system includes nn MIMO transceiver circuitry and two or more antennas and adaptive modulation and demodulation in response to slow varying pathloss. Each of the two or more antennas is located at a vertical height above an average sea mean level within the evaporation duct. Availability percentage for different pathloss ranges along with adaptive modulation contributes to the overall availability according to the varying evaporation duct height.

A wireless communication system includes a first wireless communication node for transmitting a data signal that is sent to a second wireless communication node by skywave propagation over at least two different data transmission paths. The first data transmission path includes at least one reflection point where the data signal is reflected by the atmosphere and the second data transmission path includes more reflection points than the first data transmission path. The data signal that travelled along the first data transmission path is decoded before the data signal that travelled along the second data transmission path.