A method may be provided. One or more packets from a client may be received, in a block based modulation environment, at one or more switchable antennas of an access point. The access point may have a plurality of switchable antennas. Each switchable antenna may have an antenna state. The plurality of switchable antennas may be switched among such that at least five of the antenna states are sampled. Angle of arrival of the client may be calculated based on the at least five of the antenna states.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may detect a trigger for entering an antenna switched diversity low power mode. The UE may switch from a first antenna switched diversity mode with a first interval between antenna switched diversity measurements to a second antenna switched diversity mode with a second interval between the antenna switched diversity measurements based at least in part on detecting the trigger for entering the antenna switched diversity low power mode. Numerous other aspects are provided.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify a first timer associated with a first antenna and a second timer associated with a second antenna. The UE may identify an expiration of the first timer associated with the first antenna. The UE may determine, based at least in part on the identified expiration of the first timer, whether a remaining time of the second timer associated with the second antenna is less than a timer threshold. The UE may select, based at least in part on the determination that the remaining time of the second timer is less than the timer threshold, the second antenna. Numerous other aspects are provided.

A radio device receives data from a base station that transmits a first radio signal, carrying a first data block, in a first time window, and a second radio signal, also carrying the first data block, in a different, second time window. The radio device comprises first and second antennas, receive circuitry, and a switch for selectively connecting the receive circuitry to the first antenna or to the second antenna. It is configured to sample the first radio signal, received by the first antenna in the first time window, to generate first sampled data; disconnect the first antenna from the receive circuitry and connect the second antenna; sample the second radio signal, received by the second antenna in the second time window, to generate second sampled data; and use both the first sampled data and the second sampled data to decode the first data block.

Disclosed are an electromagnetic interference control method, an electronic device and a non-transitory computer-readable storage medium. The method includes detecting whether a camera of the electronic device is activated, responsive to detecting that the electronic device receives a voice communication service; detecting whether electromagnetic interference occurs between the camera and a radio frequency system of the electronic device, responsive to detecting that the camera is activated; if yes, responsive to determining that the currently activated primary antenna is a first antenna, sending a first preset instruction to a modem by an application processor; and receiving the first preset instruction by the modem for switching the activated antenna from the first antenna to a second antenna and fix. Based on the method, the interference of a radio frequency system on a mobile phone camera is reduced, camera screen crash or jam is reduced, and imaging quality is improved.

A radio communication apparatus includes: a first radio frequency subunit, configured to modulate a third analog baseband signal into a third carrier signal, and send the third carrier signal to a first switch; a second radio frequency subunit, configured to modulate a fourth analog baseband signal into a fourth carrier signal, and send the fourth carrier signal to a second switch; the first switch; the second switch; and the first duplexer shared by a first switch and a second switch, configured to receive the third carrier signal from the first switch, receive the fourth carrier signal from the second switch, filter the third carrier signal and the fourth carrier signal to combine the third carrier signal and the fourth carrier signal to obtain a second carrier aggregation signal, and input the second carrier aggregation signal to a first antenna.

The disclosed systems, structures, and methods are directed to an orbital angular momentum (OAM) receiver. The OAM receiver comprising at least three receiver antenna elements configured to receive radiated OAM-RF waves and generate antenna element output signals, a selection-antenna switch operative to receive and switch between a second receiver antenna element RX.sub.2a output and a third receiver antenna element output RX.sub.2b, a phase adjusting unit configured to adjust a phase of the output of the selection-antenna switch, a hybrid coupler configured to provide a proportional summation and difference of the two modulated signals, a switching unit configured to limit the coupler output signal to gating time-intervals during which fractional pseudo-Doppler frequency shifts occur, an orthogonal filter bank configured to generate a vector X(t) containing shifted low-frequency values associated with all of the K OAM modes, and an adaptive unit configured to facilitate separation of the OAM-RF waves.

A reception apparatus of a time division multiple access (TDMA) system for performing intermittent reception by a reception period of a time slot and a non-reception period of a predetermined number of time slots which follow the reception period and in which reception is suspended includes a symbol clock controller configured to perform symbol synchronization at a timing at which a synchronous word included in the reception period after the non-reception period, and correct a symbol clock frequency of a symbol clock based on a number of time slots and a symbol count value during a previous reception period and the non-reception period following the previous reception period; and a reception period controller configured to correct, after detection of the synchronous word, a reception termination timing of the reception period in which the synchronous word is detected based on the symbol clock with the corrected symbol clock frequency.

Embodiments of the present disclosure relate to a method, a device and a computer readable medium for determining a location of a communication device. According to the embodiments of the present disclosure, a network device determines a location of a terminal device relative to a network device using signals received from the terminal device via a reference antenna and a switchable antenna array, thereby improving precision of determining the location of the terminal device.

A radio presence-advertising signal (PAS) a PAS emitter is simultaneously received at two or more co-located directional antennas that are coupled to respective radio receivers. The antennas have reception sensitivity lobes that overlap to define a region of interest at the overlap. Substantially cotemporaneous signal strength indications are obtained from the radio receivers. A difference signal representative of a difference between two of the obtained signal strength indications of the respective antennas is generated. An average signal representative of a running average of two or more of the obtained signal strength indications is generated and used to produce a normalized confidence indicator indicating a level of confidence that the PAS emitter is disposed inside (e.g., centered in) the region of interest or alternatively indicating a level of confidence that the PAS emitter is disposed outside the region of interest. Action is taken or avoided based on the confidence signal.