Abstract: In some implementations, an apparatus transmits information indicating a modulation and coding scheme (MCS) table for transmitting non-legacy acknowledgement (ACK) frames during a ranging operation to a responder device, receives a ranging frame including an indication of whether the responder device is capable of supporting the indicated MCS table, and transmits to the responder device an ACK frame using an MCS that is based on the capability of the responder device to support the MCS table. In other implementations, the apparatus receives from an initiator device information indicating an MCS table for transmitting non-legacy ACK frames during the ranging operation, transmits a ranging frame including an indication of whether the apparatus is capable of supporting the indicated MCS table, and receives from the initiator device an ACK frame transmitted using an MCS that is based on the capability of the apparatus to support the MCS table.

Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for a ranging protocol between two wireless local area network (WLAN) devices. In one aspect, the ranging protocol may be adjusted based on channel quality of a wireless medium between the WLAN devices. For example, a quantity of ranging frames and bandwidth for the ranging frames may be adjusted based on the channel quality. In some implementations, the channel quality may be determined using setup messages for the ranging protocol without a wireless association between the WLAN devices. The ranging protocol may be useful for range determination in an indoor environment where a WLAN is deployed. In some implementations, the ranging protocol may be used to determine a location of a WLAN device.

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for detecting motion using wireless local area network (WLAN) communications. A first WLAN device having multiple antennas (radios) may determine a metric based on differences in spatial signal processing characteristics between the multiple antennas. By comparing changes in the metric over a plurality of wireless signals over time, the first WLAN device may detect motion in the environment near the first WLAN device. The spatial signal processing characteristics may be based on received WLAN communications from a second WLAN device, based on beamforming feedback from the second WLAN device, or based on wireless signal reflections detected by the first WLAN device. Various techniques may be used to adjust or mitigate random phase differences between two antennas on some tones. Motion detection based on WLAN communications may trigger activities or notifications by the first WLAN device.

Abstract: An apparatus is disclosed according to certain aspects of the present disclosure. The apparatus comprises an interface configured to receive, from a wireless node, at least one ranging frame. The apparatus also comprises a processing system configured to determine at least one round trip time (RTT) between the apparatus and the wireless node based on the received at least one ranging frame, determine a quality of the at least one RTT based on the received at least one ranging frame, and generate a feedback frame comprising the at least one RTT and the quality of the at least one RTT. The interface is further configured to output a feedback frame for transmission to the wireless node.

Abstract: The present invention provides a single-frame impeller of a wind turbine generator set. The impeller includes blades and a blade adjusting device. The blade adjusting device comprises a blade adjusting chamber to which the blades are connected, a motor and an adjusting mechanism. The adjusting mechanism comprises transmission mechanism, adjusting frame, rotating arm and connecting rods. Transmission mechanism comprises swinging arm, a positioning shaft, a main drive arm and a push-pull rod. The adjusting frame is assembled onto blade adjusting chamber; the rotating arms are fixed on the blade shafts and the connecting rods, and the other end of each connecting rod is hinged with the adjusting frame; two ends of the positioning shaft are installed on the fixed seat; swinging arm is fixed at positioning shaft and is hinged with main drive arm, and the main drive arm is connected with the motor.

Abstract: This disclosure provides systems, methods and apparatuses for detecting motion based on wireless signals. In some implementations, a receiving device may receive, from a transmitting device, a packet containing a sequence. In some aspects, the packet may be a Bluetooth packet, and the sequence may be contained in a supplemental information appended to the Bluetooth packet. The receiving device may estimate angle information of the packet based on the sequence, and determine a difference between the estimated angle information and a reference angle. The angle information may be an angle of arrival (AoA) or an angle of departure (AoD) of the packet. The receiving device may detect motion based on the determined difference.

Abstract: In a particular aspect, an apparatus includes first communication circuitry configured to perform first fine timing measurement (FTM) operations with respect to a device to generate first measurement data. The first FTM operation correspond to a first frequency band. The apparatus includes second communication circuitry configured to perform second FTM operations with respect to the device to generate second measurement data. The second FTM operations correspond to a second frequency band that is different than the first frequency band. The apparatus also includes a processor configured to compare the first measurement data and the second measurement data.

Abstract: This disclosure provides systems, methods and apparatuses, including computer programs encoded on computer storage media, for ranging procedures performed using antenna switching. In one aspect, a device initiating a ranging procedure may transmit a ranging request, which may include antenna switching capabilities of the initiating device, a request for antenna switching by a responding device during the ranging procedure, or both. Ranging signaling may be communicated between the initiating device and the responding device using different transmit antennas, receive antennas, or both. In some implementations, ranging messages transmitted by the responding device may include transmit antenna indices used for transmission of different ranging messages, and receive antenna indices used for reception of different ranging response messages.

Abstract: This disclosure provides systems, methods and apparatuses for detecting motion based on one or more wireless signals. In some implementations, a receiving device may receive a first frame and a second frame from a transmitting device, may determine a first channel impulse response (CIR) based on the first frame, may determine a second CIR based on the second frame, may determine a difference between a shape of the first CIR and a shape of the second CIR, and may detect motion based on the determined difference.

Abstract: Method, apparatus and systems for detecting motion of an object or person have been disclosed. The method and the accompanying apparatus for motion detection include determining a plurality of channel impulse response (CIR) power profiles over a plurality of time sampling taps of one or more received signals, time aligning the plurality of the CIR power profiles based on time sampling taps of one or more occurrences of peak CIR power levels being above a threshold in each of the plurality of the CIR power profiles for generating a reference CIR power profile, and detecting motion based on a comparison of the reference CIR power profile to a captured signal CIR power profile. The detecting motion may be based on a coarse motion detection process, and followed by a fine motion detection process if a correlation degree threshold is below a level in the coarse motion detection process.

Abstract: Disclosed embodiments facilitate wireless channel calibration, ranging, and direction finding, between networked devices. A method on a first station (STA) may comprise: broadcasting, at a first time, a first NDPA frame to a plurality of second STAs. The first NDPA frame may include a first bit indicating that one or more subsequent frames comprise ranging or angular information. After a Short Interval Frame Space (SIFS) time interval from the first time, a second frame may be broadcast. The second frame may be a Null Data Packet (NDP) frame. In response, a plurality of Compressed Beamforming (CBF) frames may be received at the first STA where each CBF frame may be received from a distinct corresponding second STA, and may include Channel Feedback Information field with information pertaining to communication channel between the first STA and the corresponding second STA. The communications may be encoded using Orthogonal Frequency Division Multiple Access.

Abstract: Various aspects for motion detection and/or gesture recognition in a wireless communication device are disclosed, and may include determining whether a source address of a received data packet is a source address of the wireless device, determining whether a process for the motion detection and/or gesture recognition is enabled in the wireless device and processing one or more received signals for the motion detection and gesture recognition occurring in a proximity of the wireless device. The one or more received signals are transmitted from a transmit antenna of the wireless device and received via a receive antenna of the wireless device. The received data packet is carried by at least one of the one or more received signals. The received data packet may be a Bluetooth data packet carrying the source address.

Abstract: Various aspects for motion detection and/or gesture recognition in a wireless communication device are disclosed, and may include a transmit/receive radio frequency switch including a control input for controlling radio frequency signal routing of the switch from a radio frequency transmit port of the wireless device to an antenna and from the antenna to a radio frequency receive port of the wireless device, a first radio frequency coupler for coupling to the transmit port of the wireless device and for passing of transmit signals from the transmit port to the antenna through the switch, a second radio frequency coupler for coupling to the receive port of the wireless device and for passing of receive signals from the antenna to the receive port through the switch, and a connector for connecting a transmit isolation port of the first coupler to a receive isolation port of the second coupler.

Abstract: The present disclosure discloses a method of displaying a cascading menu that includes a plurality of submenus. The method determines a first submenu as indicated for browsing by a user based on a clicking event of the user. When an operation interface of the first submenu is in a collapsed mode, a number of submenus that are currently in an expanded mode within an operation interface of the cascading menu is counted. When the number of submenus that are currently in the expanded mode reaches a defined threshold, at least a second submenu is selected from the submenus that are currently in the expanded mode, and an operation interface of the second submenu is shrunk. The operation interface of the first submenu is expanded. Therefore, a size of the operation interface of the cascading menu will not increase as the number of the expanded submenus increases. As such, the amount of a page space occupied by the cascading menu is reduced and utilization of the page space is improved.

Abstract: Generally, the described techniques provide for protection mechanisms for sounding training signals transmitted between wireless devices when performing ranging sounding estimation. For example, sounding training signals may be encoded to include a sequence of phase rotations or cyclic shifts to protect the sounding training signal from peer devices. In some cases, encoding information associated with a long training field (LTF) may be transmitted either before or after the LTF is transmitted. Additionally or alternatively, a time delay may be introduced to the sounding training signal, where timing information may be removed from one or more fields of the sounding training signal and the time delay may be appended to an interframe spacing. Alternatively, a frame may be split into multiple frames with the sounding training signal in a first frame, and timing information in a second frame that is offset in time from the first frame.

Abstract: Certain aspects of the present disclosure relate to location reporting for extremely high frequency (EHF) devices. Certain aspects of the present disclosure provide an apparatus for wireless communications. The apparatus generally includes a transmit interface configured to output a first frame for transmission to another apparatus at a first time, a receive interface configured to obtain, at a second time, a second frame transmitted by the other apparatus in response to the first frame, and a processing system configured to generate a third frame for transmission to the other apparatus via the transmit interface, the third frame including information indicating a difference between the first time and the second time and an indication of at least one of an angle of departure of the first frame or an angle of arrival of the second frame.

Abstract: Devices and methods for wireless communication are disclosed. A method includes a wireless station receiving a first packet that includes a first media payload and a first media timestamp from a second device. The method includes the station capturing a time of arrival (TOA) timestamp in response to receiving the first packet from the second device. The TOA timestamp is sampled using a device clock of the station. The method includes the station receiving a second packet that includes a second media payload and a second media timestamp from the second device. A time of departure (TOD) timestamp associated with a transmission time of the first packet is embedded in the second packet. The TOD timestamp is sampled using a system clock of the second device. The method includes the station synchronizing its device clock to the system clock of the second device based on the TOA and TOD timestamps.

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may establish a short-range communication link with a second wireless device using a first antenna of a plurality of antennas at the first wireless device. The apparatus may determine WLAN link quality information associated with each of the plurality of antennas. The apparatus may determine which one of the plurality of antennas to use for subsequent short-range communications with the second device based at least in part on the WLAN link quality information. The apparatus may perform subsequent short-range communications with the second device using the one of the plurality of antennas determined based at least in part on the WLAN link quality information.

Abstract: The present disclosure discloses a method of displaying a cascading menu that includes a plurality of submenus. The method determines a first submenu as indicated for browsing by a user based on a clicking event of the user. When an operation interface of the first submenu is in a collapsed mode, a number of submenus that are currently in an expanded mode within an operation interface of the cascading menu is counted. When the number of submenus that are currently in the expanded mode reaches a defined threshold, at least a second submenu is selected from the submenus that are currently in the expanded mode, and an operation interface of the second submenu is shrunk. The operation interface of the first submenu is expanded. Therefore, a size of the operation interface of the cascading menu will not increase as the number of the expanded submenus increases. As such, the amount of a page space occupied by the cascading menu is reduced and utilization of the page space is improved.

Abstract: Disclosed are systems, methods and devices for obtaining round trip time measurements for use in location based services. In particular implementations, a fine timing measurement request message wirelessly transmitted by a first transceiver device to a second transceiver device may permit additional processing features in computing or applying a signal round trip time measurement. The fine timing measurement may include one or more files specifying a requested number of fine timing measurement messages requested for transmission from the first wireless transceiver device in response to fine timing measurement request message. Such a signal round trip time measurement may be used in positioning operations.