Abstract: Systems, methods, and devices reduce and mitigate spurs that may occur in transmit waveforms of wireless communications devices. Methods include receiving a plurality of samples of a baseband transmission and generating, using a processing device, an estimated amplitude and an estimated phase of a spur component of the baseband transmission based on the received plurality of samples, the spur component being a spectral spike in a transmit waveform. Methods further include generating, using the processing device, a canceling signal configured to cancel the estimated amplitude and estimated phase of the spur component, and canceling the spur component of the baseband transmission by combining the canceling signal with a transmission of at least a portion of a data packet.

Abstract: One example of a device includes a Bluetooth transceiver, a Wireless Local Area Network (WLAN) transceiver, and a controller. The WLAN transceiver is proximate the Bluetooth transceiver. The controller is communicatively coupled to the Bluetooth transceiver and the WLAN transceiver. The controller is configured to adjust a cell size of the WLAN transceiver or the Bluetooth transceiver to reduce interference between WLAN transceiver traffic and Bluetooth transceiver traffic.

Abstract: Systems, methods, and devices implement channel scanning for establishing connections between wireless devices. Methods include selecting a first plurality of channels of a wireless device, the first plurality of channels being sub-bands of a wireless device, scanning the first plurality of channels for a transmission from an access point, the first plurality of channels being scanned in parallel, and selecting a second plurality of channels of the wireless device, the second plurality of channels being sub-bands of the wireless device. Methods further include scanning the second plurality of channels for the transmission from the access point, the second plurality of channels being scanned in parallel.

Abstract: A method can include, by operation of WLAN circuits, determining an estimated duration for communications of a coexisting wireless circuit (coex communications). In response to at least the medium being free, a CTS-to-self frame can be transmitted having a first duration equivalent to the estimated duration for the coex communications. At an actual start for the coex communications, if the first duration is not sufficient to cover the actual duration, a second CTS-to-self frame can be transmitted with a second duration that extends beyond the first duration sufficient to cover the actual duration. Corresponding devices and systems are also disclosed.

Abstract: Systems, methods, and devices select antennas to enhance the range and throughput of wireless communications devices. Methods include identifying a plurality of combinations of antennas based on a plurality of available antennas for a wireless communications device, and generating, using a processing device included in a multiple-input-multiple-output (MIMO) device, a plurality of quality metrics including at least one quality metric for each of the identified combinations of antennas, where each of the at least one quality metrics represents a signal quality of a signal associated with each of the plurality of antennas, and wherein the signal is a spatial stream. Methods further include selecting at least two antennas from the plurality of combinations of antennas based, at least in part, on the plurality of quality metrics, where the at least two antennas are selected for use by the wireless communications device during a transmitting or receiving operation.

Abstract: Systems, methods, and devices enable coexistence of traffic for collocated transceivers. Methods may include transmitting a baseband training signal via a transmit path of a wireless communications device, obtaining a plurality of samples of the baseband training signal via a receive path of the wireless communications device, and generating a plurality of weighted averages based on the plurality of samples. Methods may further include generating an estimated amplitude and an estimated phase for at least one spur frequency of the wireless communications device based, at least in part, on the plurality of weighted averages.

Abstract: Systems, methods, and devices improve medium usage of wireless devices. Methods include determining, using one or more processors, multiple protection frames should be used for a first wireless radio and a second wireless radio based, at least in part, on an interference parameter, wherein the first wireless radio and the second wireless radio are collocated in a same wireless device. Methods also include determining, using the one or more processors, one or more transmission parameters associated at least one of the wireless radios, the one or more transmission parameters representing a first duty cycle of the first wireless radio and a second duty cycle of the second wireless radio. Methods further include determining, using the one or more processors, a number of protection frames and a protection frame duration based, at least in part, on the one or more transmission parameters.

Abstract: Core transmit suspension is provided in multiple core wireless devices, systems, and methods. A first wireless device may transmit a plurality of data packets by a first core and a second core of the first wireless device to a second wireless device at a data rate. A data packet may be transmitted by at least one of the first core or the second core. The first wireless device may receive a first core acknowledgement (ACK) of the data packet by the first core and a second core ACK of the data packet by the second core from the second wireless device. The first wireless device may determine that a function of a power metric of the first core ACK and a power metric of the second core ACK satisfies a threshold to produce a result. The first wireless device may suspend, while the data rate sustains, transmission of the plurality of data packets by a suspended core of the first core or the second core based on the result.

Abstract: Methods, apparatus and systems are disclosed for receiving an IEEE 802.11 frame at a WLAN station, determining whether the frame is decodable and addressed to the WLAN station, and entering a reduced power state if the frame is not decodable or not addressed to the WLAN station.

Abstract: Systems, methods, and devices select antennas to enhance the range and throughput of wireless communications devices. Methods include identifying a plurality of combinations of antennas based on a plurality of available antennas for a wireless communications device, and generating, using a processing device included in a multiple-input-multiple-output (MIMO) device, a plurality of quality metrics including at least one quality metric for each of the identified combinations of antennas, where each of the at least one quality metrics represents a signal quality of a signal associated with each of the plurality of antennas, and wherein the signal is a spatial stream. Methods further include selecting at least two antennas from the plurality of combinations of antennas based, at least in part, on the plurality of quality metrics, where the at least two antennas are selected for use by the wireless communications device during a transmitting or receiving operation.

Abstract: The embodiments described herein are directed at techniques to de-correlate Bluetooth interference seen across WLAN receive antennas/space in a Bluetooth transceiver/WLAN transceiver combination device. A Bluetooth interference whitening technique may be utilized, wherein a whitening matrix is computed based on a leakage signal resulting from a training signal transmitted by the Bluetooth transceiver. The leakage signal may leak in to the WLAN transceiver and a set of attributes is calculated for each frequency the leakage signal is received on. One or more whitening matrixes are calculated based on the set of attributes for each frequency the leakage signal is received on. In response to the WLAN transceiver receiving a signal of interest, an appropriate whitening matrix from the one or more whitening matrixes is selected and is then applied to the received signal of interest to de-correlate any interference generated as a result of the Bluetooth transmission.

Abstract: Systems, methods, and devices perform channel interference detection for wireless devices. Methods include receiving a signal at a wireless device, the signal including at least one data subcarrier and one or more guard subcarriers. Methods also include determining, using processing logic, that one or more guard subcarriers are available for adjacent channel interference (ACI) detection, measuring, using the processing logic, a power of each of the one or more guard subcarriers and a total power of the one or more guard subcarriers, and determining, using the processing logic, an ACI is present based, at least in part, on the measurements of the one or more guard subcarriers. Methods further include performing, using the processing logic, one or more deweighing operations based on one or more identified features of the ACI.

Abstract: One example of a device includes a Bluetooth transceiver, a Wireless Local Area Network (WLAN) transceiver, and a controller. The WLAN transceiver is proximate the Bluetooth transceiver. The controller is communicatively coupled to the Bluetooth transceiver and the WLAN transceiver. The controller is configured to adjust a cell size of the WLAN transceiver or the Bluetooth transceiver to reduce interference between WLAN transceiver traffic and Bluetooth transceiver traffic.

Abstract: Aspects of the present disclosure relate to systems and methods for receiving, managing, and displaying annotations on documents in real-time. A user (e.g., an author of a document) uploads a document into a real-time annotation system, which may then generate a composite presentation based on the uploaded document. The composite presentation includes all the content of the document presented in a specially configured graphical user interface to receive and manage annotations from a plurality of user devices.

Abstract: A method can include, in a wireless device connected to a first network and configured to transmit over a medium, while a detected packet is being received: determining if the detected packet has a network identification value, the network identification value identifying a network in which wireless devices are connected; when at least the network identification value of the detected packet matches that of the first network, setting a timer value that prevents transmissions on the medium by the wireless device during the duration of the detected packet; and when at least the network identification value of the detected packet does not match that of the first network, dropping the detected packet before it is fully received and not setting the timer value.

Abstract: Disclosed are methods and systems for delaying packet transmissions over a wireless communication channel until a more favorable channel condition is detected. A device may measure a channel metric when it receives periodic beacon signals. The device may compare the channel metric against a programmed metric threshold. If the channel metric is less than the metric threshold, the device may delay the transmission of a packet until a later transmission window or transmit opportunity (TXOP) when the channel metric rises above the metric threshold, indicating the presence of a more favorable condition for transmission, or until a preconfigured timeout period elapses before the more favorable condition is found.

Abstract: Systems, methods, and devices reduce and mitigate spurs that may occur in transmit waveforms of wireless communications devices. Methods include receiving a plurality of samples of a baseband transmission and generating, using a processing device, an estimated amplitude and an estimated phase of a spur component of the baseband transmission based on the received plurality of samples, the spur component being a spectral spike in a transmit waveform. Methods further include generating, using the processing device, a canceling signal configured to cancel the estimated amplitude and estimated phase of the spur component, and canceling the spur component of the baseband transmission by combining the canceling signal with a transmission of at least a portion of a data packet.

Abstract: Systems, methods, and devices provide multi-user communication between wireless devices. Methods include identifying, using processing elements of a software enabled access point, a plurality of wireless devices communicatively coupled to the software enabled access point, aggregating, using the processing elements, data associated with the plurality of wireless devices, and generating, using the processing elements, transmission instructions identifying transmission periods for the plurality of wireless devices. Methods also include generating, using the processing elements, a data frame based on the aggregated data, the data frame comprising a data payload that comprises the aggregated data and the transmission instructions.

Abstract: Systems, methods, and devices schedule network traffic for wireless communications devices. Methods include identifying a plurality of stations included in a first network, and generating, using one or more processors of a first access point, a network traffic schedule configured to assign a plurality of service periods to the plurality of stations, the network traffic schedule identifying a plurality of sleep times and wake times for the plurality of stations. Methods further include transmitting a query frame to at least one station of the plurality of stations during a designated service period, and receiving a data transmission from the at least one station, the data transmission being generated by the station based on transmission parameters included in the query frame.

Abstract: The embodiments described herein are directed at techniques to de-correlate Bluetooth interference seen across WLAN receive antennas/space in a Bluetooth transceiver/WLAN transceiver combination device. A Bluetooth interference whitening technique may be utilized, wherein a whitening matrix is computed based on a leakage signal resulting from a training signal transmitted by the Bluetooth transceiver. The leakage signal may leak in to the WLAN transceiver and a set of attributes is calculated for each frequency the leakage signal is received on. One or more whitening matrixes are calculated based on the set of attributes for each frequency the leakage signal is received on. In response to the WLAN transceiver receiving a signal of interest, an appropriate whitening matrix from the one or more whitening matrixes is selected and is then applied to the received signal of interest to de-correlate any interference generated as a result of the Bluetooth transmission.