Quantenna Communications, Inc.

Semiconductor Components Industries, LLC

Maxlinear, Inc.

Ikanos Communications, Inc.

On Semiconductor Connectivity Solutions, Inc.

Lsi Corporation

Hossein Dehghan

Sigurd Schelstraete

Sam Heidari

Bahador Amiri

Debashis Dash

Abhishek Kumar Agrawal

Qasem Aldrubi

Imran Latif

Aykut Bultan

Huizhao Wang

Pengcheng Zhan

Georgy Gilyarovskiy

Narayanan Bharath

Ramanujam Jagannath

Steve Schultz

Muhammad Sayed Khairy Abdelghaffar

Jun Lu

Songping Wu

Mikhail Yurievich Lyakh

Reza Hoshyar

Karim Nassiri Toussi

Hongping Liu

Evgenii Pustovalov

Kapil Gulati

Sunil Assao

Safiali Rouhi

Qiang Wang

Eugenio Rivera Ramos

Shivashankar Beesanahalli

Xi Huang

Joe Chow

Karl Kowk Ho Yick

Neville Young

Yuan Yang

Xiaoliang Yue

Hui Lan

Bo Zhao

Dapeng Mi

Kirill Yurkov

Example implementations are directed to methods and systems employing a solicited sounding protocol that includes receiving, by a second access point, a sounding trigger broadcast by a first access point. The methods and systems also include receiving, by the second access point, a dedicated training signal from a first station in response to the sounding trigger broadcast by the first access point, and generating, by the second access point, channel characteristics of a channel based on the first dedicated training signal, the channel including a forward channel between the second access point and the first station.

Beamformer solicited sounding

A wireless transceiver having radios which radios that support wireless communications with associated stations on a corresponding wireless local area network (WLAN). The wireless transceiver also includes: a utilization monitoring circuit, an association targeting circuit, and a power backoff circuit. The utilization monitoring circuit monitors communications between each of the radios and its associated stations. The association targeting circuit identifies, from the monitored communications of the utilization monitoring circuit, an underutilized one of the radios as a target radio for re-associating stations currently associated with at least one other radio and initiates the re-association with the target radio of the stations currently associated with the at least one other radio. The power backoff circuit reduces power to the at least one other radio.

Multi-radio wireless transceiver power conservation

Methods and systems may include processes by which the reliability and robustness of a wireless network may be improved. In some implementations, a method may include selecting at least two resource units to be used for communications to a single client device; and transmitting data in duplicate via each of the at least two resource units to the client device such that the client device is able to combine the data from each of the at least two resource units into a single instance of the data. In some implementations, a method may include obtaining notification of one or more ranges of frequencies corresponding to a set of resource units to be avoided in a spectrum of available frequencies, and allocating resource units to a set of client devices that covers the available frequencies while excluding the set of resource units to be avoided.

Multi-link range extension

A method to operate a wireless access point (WAP) that includes identifying multiple stations from uplink statistics of a plurality of uplinks and determining an optimal spatial state of an antenna array for reception of the plurality of uplinks. Channel state information (CSI) is evaluated for each antenna in the antenna array. Determining the optimal spatial state of the antenna array includes using the CSI for each antenna to extrapolate the optimal spatial state of the antenna array for the plurality of uplinks. The method further includes changing a spatial state of the antenna array to the optimal spatial state.

WAP uplink optimization by selection of MIMO antennas spatial states

Example operations may include determining a first noise estimate of noise that propagates along a receive path of a device. The operations may further include determining a second noise estimate of the noise and determining a cross-relationship estimate with respect to the noise. In addition, the operations may include adjusting one or more correction filters configured to correct for imbalances between a first branch and a second branch of the receive path. The adjusting may be based on the first noise estimate, the second noise estimate, and the cross-relationship estimate.

Receive path in-phase and quadrature imbalance correction using circuit noise

A method may include determining at a first AP that a first original packet sent from a second AP to a STA failed to decode at the STA. The method may include sending from the first AP a first retransmission packet that includes error correction information for the first original packet the STA. The method may include the first AP coordinating with a third AP that is sending an ongoing communication to another STA to avoid interference between the first retransmission packet and the ongoing communication. The method may include sending a second original packet from the first AP to the STA or the other STA.

Hybrid distributed retry mechanism

Example implementations are directed to methods and systems employing a solicited sounding protocol that includes an efficient communication sequence for operating a wireless transceiver transmitting a sounding trigger to one or more beamformees via a forward channel, receiving at least one dedicated training signal from the one or more beamformees via a reverse channel in response to the sounding trigger, and for each of the received dedicated training signal. The method also includes estimating forward CSI derived based on the dedicated training signal from an associated beamformee; and where subsequent packets are precoded with precoding derived from the forward CSI for transmission to the associated beamformee via the forward channel. Example aspects including scheduling multiple dedicated training signals from one or more beamformees based on a single sounding trigger.

A privacy-enhancing wireless communication method for use by a transmitting wireless device having a first location, the method comprising: obtaining a frame preamble using a transceiver device at a location, wherein the frame preamble includes a predetermined pattern and wherein movement information corresponding to the location is detectable based on channel state information of the transceiver device in accordance with the pre-determined pattern; modifying the predetermined pattern of the frame preamble to include amplitude or phase distortion; and masking the movement information by transmitting, using the transceiver device, a frame including the frame preamble with the modified predetermined pattern.

Secure channel state information with adaptive obfuscation

A method may include obtaining spatial diagnostics data determined independent of changes to channel state parameters associated with a communication channel; and providing a service associated with a location at which the network exists using the spatial diagnostics data. Another method may include obtaining channel state parameters associated with a communication channel, the channel state parameters changing over time; determining spatial diagnostics data independent of changes to the channel state parameters; and providing a service associated with a location at which the network exists using the spatial diagnostics data. Another method may include monitoring activity at a location based on spatial diagnostics data associated with a communication channel of a network with a WAP; and in response to detecting an unrecognized device at the location, calibrating the WAP to nullify parameters of the communication channel from the unrecognized device without disrupting communication with authorized devices.

Adaptive spatial diagnostics in a wireless network

Example operations may include obtaining a first received signal of a first wireless transmission by a transmitting device of a wireless signal received at a receiving device. The operations may also include obtaining a second received signal of a second wireless transmission by the transmitting device that is a retransmission of the wireless signal also received at the receiving device. The operations may further include determining, based on the first received signal and the second received signal, an equalization of distortion of propagation of the wireless signal between the transmitting device and the receiving device. In addition, the operations may include generating an equalized signal based on the determined signal equalization, wherein the equalized signal is an estimate of the wireless signal as transmitted by the transmitting device.

Received signal equalization of wireless transmissions

A MIMO transceiver may include a communication chain configured to generate a signal at a first frequency and that includes a pre-distorter configured to accept pre-distortion parameters to pre-distort signals and a PA to amplify the signals. The MIMO transceiver may include a DPD chain configured to receive the signal at the first frequency and that includes a data converter to sample the signal using a sampling rate based on a baseband frequency and to generate a sample signal based on the sampling of the signal. The MIMO transceiver may include a buffer configured to buffer the sample signal. The MIMO transceiver may include a DPD circuit configured to calibrate the pre-distortion parameters based on the buffered sample signal. The MIMO transceiver may include a CTS circuit to transmit a CTS-to-Self signal within an operational environment to reserve a duration of time for the MIMO transceiver to perform DPD calibration.

Direct sampling for digital pre-distortion calibration

A MIMO transceiver configured for digital pre-distortion may include a first communication chain configured to wirelessly transmit a signal at a first frequency. The first communication chain may include a pre-distorter circuit configured to accept parameters to pre-distort signals prior to transmission. The first communication chain may include a PA configured to amplify the signals of the first communication chain prior to transmission. The MIMO transceiver may include a second communication chain. The second communication chain may be configured to wirelessly receive the signal at the first frequency. The second communication chain may include a converter circuit configured to convert the signal to a baseband frequency. The second communication chain may include a buffer configured to buffer the signal at the baseband frequency. The MIMO transceiver may include a DPD circuit configured to calibrate the parameters based on the buffered signal to compensate for non-linearity in amplification by the PA.

Over the air coupling for digital pre-distortion calibration

An example method may include receiving a wireless packet from a sender node at a receiver node that includes a PHY and a MAC. The wireless packet may include multiple codewords. The method may include error checking the codewords at the PHY of the receiver node for codeword-level errors. The method may include generating multiple MPDUs from the codewords. The method may include error checking the MPDUs at the MAC of the receiver node for MPDU-level errors. The method may include generating two-tier feedback based on the error checking at the PHY and the MAC of the receiver node. The method may include sending the two-tier feedback to the sender node.

HARQ framing and retransmission with two-tier feedback

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Diablo, CA, United States of America

Hossein Dehghan