Apparatus, methods, and computer readable media for facilitating of measuring occasions for transmissions based on frequency division multiplexing and spatial division multiplexing are disclosed herein. An example method for wireless communication at a UE includes receiving, from a base station, a hopping pattern indication configuring a hopping pattern. The example method also includes measuring interference of respective CSI-RS transmitted to other UEs included in a UE group based on at least the hopping pattern indication. The example method also includes reporting the measured interference to the base station. An example method for wireless communication at a base station includes transmitting a hopping pattern indication to each of a plurality of UEs. The example method also includes transmitting reference signals for the plurality of UEs using the hopping pattern among multiple subbands, and receiving a report of interference measured by each of the plurality of UEs based on the reference signals.

A base station for a wireless communications system operating in an unlicensed target band of a wireless medium includes a receiver configured to wirelessly (i) receive non-cooperative carrier data within the target band from a user equipment, and (ii) detect an operation of at least one spread spectrum channel within the target band. The station further includes a transmitter configured to wirelessly send non-cooperative carrier data within the target band to the user equipment, a memory configured to store computer-executable instructions, and a processor configured to (i) execute the computer-executable instructions, (ii) determine, based on the detection operation of the receiver, at least one sequence of the at least one spread spectrum channel, and (iii) perform at least one corrective action to mitigate interference between the transmitter and an operation of the at least one spread spectrum channel based on the determination of the at least one sequence.

A base station for a wireless communications system operating in an unlicensed target band of a wireless medium includes a receiver configured to wirelessly (i) receive non-cooperative carrier data within the target band from a user equipment, and (ii) detect an operation of at least one spread spectrum channel within the target band. The station further includes a transmitter configured to wirelessly send non-cooperative carrier data within the target band to the user equipment, a memory configured to store computer-executable instructions, and a processor configured to (i) execute the computer-executable instructions, (ii) determine, based on the detection operation of the receiver, at least one sequence of the at least one spread spectrum channel, and (iii) perform at least one corrective action to mitigate interference between the transmitter and an operation of the at least one spread spectrum channel based on the determination of the at least one sequence.

This application relates to a tamper-resistant datalink communications system. The system may include a ground-based communications module configured to be coupled to a radio controller configured to remotely control a drone comprising one or more actuators and a remote-mounted communications module configured to communicate data with the ground-based communications module. The ground-based communications module may include a ground processor configured to: receive a plurality of first signals modulated with a first modulation scheme from the radio controller, convert the plurality of first signals to a second signal modulated with a second modulation scheme different from the first modulation scheme, and generate a plurality of second duplicated signals comprising two or more duplicate signals of the second signal. The ground-based communications module may also include a plurality of ground transmitters configured to operate in different frequencies and respectively transmit the plurality of second duplicated signals to the remote-mounted communications module.

This application relates to a tamper-resistant datalink communications system. The system may include a ground-based communications module configured to be coupled to a radio controller configured to remotely control a drone comprising one or more actuators and a remote-mounted communications module configured to communicate data with the ground-based communications module. The ground-based communications module may include a ground processor configured to: receive a plurality of first signals modulated with a first modulation scheme from the radio controller, convert the plurality of first signals to a second signal modulated with a second modulation scheme different from the first modulation scheme, and generate a plurality of second duplicated signals comprising two or more duplicate signals of the second signal. The ground-based communications module may also include a plurality of ground transmitters configured to operate in different frequencies and respectively transmit the plurality of second duplicated signals to the remote-mounted communications module.

Disclosed is an ultra-wideband (UWB) system and, more particularly, a UWB system using UWB ranging factor definition. The UWB system using the UWB ranging factor definition includes a memory in which a UWB ranging factor definition program is embedded and a processor which executes the program, wherein the program predefines UWB ranging factors to define a scrambled timestamp sequence (STS) index, an encryption key, and a nonce.

A radio communication device switches a frequency channel to be used by using a predetermined hopping pattern during communication with a counterpart radio communication device, and includes a null determination unit that determines a position of a null symbol included in a received packet received from the counterpart radio communication device and an interference measuring unit that measures an interference amount by using the null symbol included in the received packet.

A radio communication device switches a frequency channel to be used by using a predetermined hopping pattern during communication with a counterpart radio communication device, and includes a null determination unit that determines a position of a null symbol included in a received packet received from the counterpart radio communication device and an interference measuring unit that measures an interference amount by using the null symbol included in the received packet.

A wireless wideband transceiver may be able to communicate with multiple frequency-hopped spread-spectrum (FHSS) devices concurrently over multiple frequencies over a short range by including a plurality of digital chains corresponding to the FHSS physical channels, individually and dynamically compensated for in-phase/quadrature imbalance in the transmit and/or receive portion. To further improve communications the transceiver may also mitigate cross interference between adjacent channel signals that are received and/or transmitted simultaneously, avoid false reception and/or transmission of co-channel signals, delay respective FHSS channels transmissions relative to other channels transmissions, speed up connection to FHSS devices and coordinate Time Division Duplexing (TDD) operation according to application dependent TX/RX binary pattern. A device that includes such a transceiver (FHSS-hotspot) may enable the concurrent usage of multiple commercially available FHSS peripheral devices without the need for additional personal host devices to be carried along with them, and in addition enable the concurrent usage of multiple commercially available FHSS personal data devices while reducing their radiation and/or latency and/or usage cost and/or power, to establish a localized multi-device multimedia session, and/or to interface with a communications network to communicate with remote parties, and/or to interface with broadcast devices to stream contents.

A wireless wideband transceiver may be able to communicate with multiple frequency-hopped spread-spectrum (FHSS) devices concurrently over multiple frequencies over a short range by including a plurality of digital chains corresponding to the FHSS physical channels, individually and dynamically compensated for in-phase/quadrature imbalance in the transmit and/or receive portion. To further improve communications the transceiver may also mitigate cross interference between adjacent channel signals that are received and/or transmitted simultaneously, avoid false reception and/or transmission of co-channel signals, delay respective FHSS channels transmissions relative to other channels transmissions, speed up connection to FHSS devices and coordinate Time Division Duplexing (TDD) operation according to application dependent TX/RX binary pattern. A device that includes such a transceiver (FHSS-hotspot) may enable the concurrent usage of multiple commercially available FHSS peripheral devices without the need for additional personal host devices to be carried along with them, and in addition enable the concurrent usage of multiple commercially available FHSS personal data devices while reducing their radiation and/or latency and/or usage cost and/or power, to establish a localized multi-device multimedia session, and/or to interface with a communications network to communicate with remote parties, and/or to interface with broadcast devices to stream contents.