Abstract: Power saving techniques for radar-based proximity sensing can include conducting proximity scans with a radar system in an omnidirectional proximity sensing mode in which signals are transmitted without directionality. Once an object is detected within a threshold proximity, the radar system can then switch to a directional proximity sensing mode to provide accurate directional detection capabilities in a desired field of view (FOV).

Abstract: Power saving techniques for radar-based proximity sensing can include conducting proximity scans with a radar system in an omnidirectional proximity sensing mode in which signals are transmitted without directionality. Once an object is detected within a threshold proximity, the radar system can then switch to a directional proximity sensing mode to provide accurate directional detection capabilities in a desired field of view (FOV).

Abstract: Various aspects of the disclosure relate to co-existence of millimeter wave (mmW) communication and radar. In some aspects, a device that supports mmW communication and radar operations may determine whether or when to conduct radar operations based on information obtained about a nearby mmW network. For example, prior to sending radar signals, the device may monitor for mmW communication signals. As another example, the device may send at least one mmW communication signal to reserve a communication medium for subsequent radar operations. As yet another example, the device may conduct radar operations during idle or allocated time periods defined by the mmW network.

Abstract: Certain aspects of the present disclosure provide an apparatus for wireless communications. The apparatus includes a processing system configured to generate a frame comprising a preamble, a first header, and a second header, wherein the preamble and the first header are configured to be decoded by a first device operating according to a first protocol, the second header not being configured to be decoded by the first device, and wherein the preamble, the first header, and the second header are configured to be decoded by a second device operating according to a second protocol; and an interface configured to output the frame for transmission.

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for performing beamforming training in multi-antenna wireless devices. For example, an apparatus for wireless communication may include a first interface configured to obtain, from each of a plurality of radio frequency (RF) modules, a first information regarding detection of one or more pilot signals via at least one antenna element at a respective one of the plurality of RF modules. The apparatus may also include a processing system configured to process the first information obtained from the plurality of RF modules to generate second information to synchronize the plurality of RF modules, and a second interface configured to provide the second information to the plurality of RF modules.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for triggering beamforming for a wireless device. For example, an apparatus for wireless communications generally includes a processing system configured to monitor one or more parameters associated with a link between the apparatus and a wireless device, and update a schedule for performing beamforming training with the wireless device based at least in part on the one or more parameters. The apparatus may further include at least one interface configured to exchange frames between the apparatus and the wireless device as part of the beamforming training performed according to the schedule that is updated.

Abstract: Certain aspects of the present disclosure relate to beamforming training using a multiple-input and multiple-output (MIMO) transmission scheme. Certain aspects of the present disclosure provide an apparatus that generally includes a processing system configured to generate a frame associated with beamforming training, the frame comprising an indication of whether the beamforming training is to be performed using a multiple-input and multiple-output (MIMO) transmission scheme. The apparatus may also include an interface configured to output the frame for transmission.

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for performing beamforming training in multi-antenna wireless devices. For example, an apparatus for wireless communication may include a first interface configured to obtain, from each of a plurality of radio frequency (RF) modules, a first information regarding detection of one or more pilot signals via at least one antenna element at a respective one of the plurality of RF modules. The apparatus may also include a processing system configured to process the first information obtained from the plurality of RF modules to generate second information to synchronize the plurality of RF modules, and a second interface configured to provide the second information to the plurality of RF modules.

Abstract: Disclosed is an apparatus for wireless communications. The apparatus includes a processing system configured to generate a single-channel frame, a bonded channel frame, or a MIMO channel frame. Each of the frame types includes a first portion and a second portion, said first portion being decodable by a first device operating according to a first protocol, said second portion not being decodable by the first device, wherein the first and second portions are decodable by a second device operating according to a second protocol; and an interface configured to output the frame for transmission. The second portion includes a first field including frequency-domain PRBS data for AGC, a second field including a time-domain sequence for timing of input sample window for FFT processing, and a third field including frequency-domain pilots for channel estimation. For MIMO, these fields for different transmit chains are transmitted in a time aligned manner.

Abstract: Certain aspects of the present disclosure provide techniques that may help reduce sector sweep time. In some cases, the techniques involve generating frames for transmission during a sector sweep procedure, each frame including one or more address fields being determined based on at least one of a transmitter address of the apparatus or a receiver address of an intended recipient of the generated frames and having fewer bits than at least one of the transmitter address or the receiver address.

Abstract: Apparatus for generating a header of a transmit frame, and for processing the header of a received frame. The header generating includes encoding header data bits to generate parity bits, repeating the header bits M times, repeating the parity bits N times, encoding the M repetitions of the header bits, encoding the N repetitions of the parity bits, combining the encoded M repetitions of the header bits with the N repetitions of the parity bits, and modulating the combined sequence to generate the header of the frame. The header processing includes demodulating the header to generate a sequence of bits, splitting the sequence into separate header and parity sequences, decoding the header and parity sequences to generate M header and N parity sequences, combining the M header sequences, combining the N parity sequences, and decoding the combined header sequences using the combined parity sequences to generate header data bits.

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for performing beamforming training in multi-antenna wireless devices. For example, an apparatus for wireless communication may include a first interface configured to obtain, from each of a plurality of radio frequency (RF) modules, a first information regarding detection of one or more pilot signals via at least one antenna element at a respective one of the plurality of RF modules. The apparatus may also include a processing system configured to process the first information obtained from the plurality of RF modules to generate second information to synchronize the plurality of RF modules, and a second interface configured to provide the second information to the plurality of RF modules.

Abstract: Certain aspects of the present disclosure provide a method for wireless communications. The method comprises generating a frame comprising a first portion and a second portion. The method also comprises outputting the first portion of the frame for transmission on at least one channel, shifting a center frequency of the at least one channel, and outputting the second portion of the frame for transmission on the at least one channel after the center frequency shift.

Abstract: Certain aspects of the present disclosure provide an apparatus for wireless communications. The apparatus includes a processing system configured to generate a frame comprising a preamble, a first header, and a second header, wherein the preamble and the first header are configured to be decoded by a first device operating according to a first protocol, the second header not being configured to be decoded by the first device, and wherein the preamble, the first header, and the second header are configured to be decoded by a second device operating according to a second protocol; and an interface configured to output the frame for transmission.

Abstract: Certain aspects of the present disclosure provide an apparatus for wireless communications. The apparatus includes a processing system configured to generate a frame comprising a first channel estimation sequence for transmission via a first channel, a second channel estimation sequence for transmission via a second channel, and at least a first portion of a data payload for transmission via a third channel, wherein the first channel includes a first frequency band, wherein the second channel includes a second frequency band different from the first frequency band, and wherein the third channel includes a third frequency band that overlaps in frequency with the first and second frequency bands; and an interface configured to output the frame for transmission.

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for performing beamforming training in multi-antenna wireless devices. For example, an apparatus for wireless communication may include a first interface configured to obtain, from each of a plurality of radio frequency (RF) modules, a first information regarding detection of one or more pilot signals via at least one antenna element at a respective one of the plurality of RF modules. The apparatus may also include a processing system configured to process the first information obtained from the plurality of RF modules to generate second information to synchronize the plurality of RF modules, and a second interface configured to provide the second information to the plurality of RF modules.

Abstract: Various aspects of the disclosure relate to co-existence of millimeter wave (mmW) communication and radar. In some aspects, a device that supports mmW communication and radar operations may determine whether or when to conduct radar operations based on information obtained about a nearby mmW network. For example, prior to sending radar signals, the device may monitor for mmW communication signals. As another example, the device may send at least one mmW communication signal to reserve a communication medium for subsequent radar operations. As yet another example, the device may conduct radar operations during idle or allocated time periods defined by the mmW network.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for triggering beamforming for a wireless device. For example, an apparatus for wireless communications generally includes a processing system configured to monitor one or more parameters associated with a link between the apparatus and a wireless device, and update a schedule for performing beamforming training with the wireless device based at least in part on the one or more parameters. The apparatus may further include at least one interface configured to exchange frames between the apparatus and the wireless device as part of the beamforming training performed according to the schedule that is updated.

Abstract: Certain aspects of the present disclosure provide an apparatus for wireless communications. The apparatus includes a processing system configured to generate a frame comprising a preamble, a first header, and a second header, wherein the preamble and the first header are configured to be decoded by a first device operating according to a first protocol, the second header not being configured to be decoded by the first device, and wherein the preamble, the first header, and the second header are configured to be decoded by a second device operating according to a second protocol; and an interface configured to output the frame for transmission.

Abstract: Certain aspects of the present disclosure provide an apparatus for wireless communications. The apparatus comprises an interface configured to receive a plurality of channel estimation sequences, wherein each one of the plurality of channel estimation sequences is received on a respective one of a plurality of channels, each one of the plurality of channels having a respective one of a plurality of frequency bands. The apparatus also comprises a processing system configured to generate a channel estimation for each one of the plurality of channels using the respective one of the plurality of channel estimation sequences, and to generate a collective channel estimation based on the channel estimations.