Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a base station, a control signal scheduling the UE to receive a downlink message from the base station using a set of time and frequency resources. The UE may identify an aggressor UE attempting to receive uplink communications, downlink communications, or both, transmitted between the UE and the base station and determine a transmit power for transmitting a jamming signal to the aggressor UE during the set of time and frequency resources. The UE may apply a jamming signal power scheme to the jamming signal by either using the determined transmit power or adjusting the determined transmit power in accordance with the jamming signal power scheme.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a base station, a control signal scheduling the UE to receive a downlink message from the base station using a set of time and frequency resources. The UE may identify an aggressor UE attempting to receive uplink communications, downlink communications, or both, transmitted between the UE and the base station and determine a transmit power for transmitting a jamming signal to the aggressor UE during the set of time and frequency resources. The UE may apply a jamming signal power scheme to the jamming signal by either using the determined transmit power or adjusting the determined transmit power in accordance with the jamming signal power scheme.

A frequency band state determining method and a related device are provided. The method includes: A detection apparatus determines an intermediate frequency signal based on a detected interfering signal in an environment and an oscillation signal that belongs to a first frequency band. The detection apparatus performs first processing on the intermediate frequency signal, to obtain a first detection result, and when the first detection result indicates that the first frequency band is busy, the detection apparatus performs second processing on the intermediate frequency signal, to obtain a second detection result. The detection apparatus determines a state of the first frequency band based on the second detection result. The detection apparatus may be a radar, and the radar may work in a use scenario of a cooperative radar.

A radar (30) is an FMCW radar. A determination unit (901) of the radar (30) executes at least one program of an attenuation determination program (324a), which determines whether an abnormal attenuation is present in a beat signal (S305), and a frequency characteristic determination program (325a), which determines whether an anomaly is present in a frequency characteristic of the beat signal (S305). The radar (30) can determine whether the beat signal (S305) is abnormal by software by executing the attenuation determination program (324a) and the frequency characteristic determination program (325a).

A radar (30) is an FMCW radar. A determination unit (901) of the radar (30) executes at least one program of an attenuation determination program (324a), which determines whether an abnormal attenuation is present in a beat signal (S305), and a frequency characteristic determination program (325a), which determines whether an anomaly is present in a frequency characteristic of the beat signal (S305). The radar (30) can determine whether the beat signal (S305) is abnormal by software by executing the attenuation determination program (324a) and the frequency characteristic determination program (325a).

A radar system and method for maintaining radar performance of radar system in jammed environment are provided. The radar system has main antenna arrangement for transmitting and/or receiving electromagnetic waves. Main antenna arrangement includes at least one main antenna element and at least one main electronics module for transmitting and/or receiving signals to/from at least one main antenna element. The system has auxiliary antenna arrangement for transmitting and/or receiving electromagnetic waves, auxiliary antenna arrangement includes at least one auxiliary antenna element and at least one auxiliary electronics module for transmitting and/or receiving signals to/from the at least one auxiliary antenna element. System has a controller connected to main antenna arrangement and to auxiliary antenna arrangement. Controller is configured to transmit first radar waveform from main antenna element, and transmit second radar waveform from auxiliary antenna element.

A radar system and method for maintaining radar performance of radar system in jammed environment are provided. The radar system has main antenna arrangement for transmitting and/or receiving electromagnetic waves. Main antenna arrangement includes at least one main antenna element and at least one main electronics module for transmitting and/or receiving signals to/from at least one main antenna element. The system has auxiliary antenna arrangement for transmitting and/or receiving electromagnetic waves, auxiliary antenna arrangement includes at least one auxiliary antenna element and at least one auxiliary electronics module for transmitting and/or receiving signals to/from the at least one auxiliary antenna element. System has a controller connected to main antenna arrangement and to auxiliary antenna arrangement. Controller is configured to transmit first radar waveform from main antenna element, and transmit second radar waveform from auxiliary antenna element.

This disclosure describes systems, methods, and devices related to an invalid location measurement report (LMR) indication. A device may identify a first null data packet (NDP) received from a first station device during, wherein the first NDP is used for channel sounding. The device may perform a time of arrival (ToA) calculation based on the NDP. The device may determine an invalid indication associated with the first NDP based on the ToA calculation. The device may generate an LMR comprising of the invalid measurement indication. The device may cause to send the LMR to the first device.

A method for confusing the electronic signature of a signal transmitted by a radar, includes the generation by the radar of at least one pulse, wherein the method comprises a step of modulation, in the pulse, of the polarization of the transmitted signal, according to two orthogonal or opposite polarizations, the modulation of the polarization being performed according to a predetermined modulation code.

A method for confusing the electronic signature of a signal transmitted by a radar, includes the generation by the radar of at least one pulse, wherein the method comprises a step of modulation, in the pulse, of the polarization of the transmitted signal, according to two orthogonal or opposite polarizations, the modulation of the polarization being performed according to a predetermined modulation code.