Cypress Semiconductor Corporation

Prasanna Kumar Sethuraman

Ayush Sood

Rajendra Kumar Gundu Rao

Paul Strauch

Kamesh Medapalli

Kiran Uln

Saishankar Nandagopalan

Visakh Asok

Suprojit Mukherjee

Sri Ramya Thota

Sridhan Kalasi Sreepada

Kalaivani K

Sridhan Sreepadha

Systems, methods, and devices seamlessly playback data files using one or more wireless connections. 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 comprising at least one quality metric for each of the identified combinations of antennas, wherein each of the at least one quality metrics represents a signal quality of a signal included in a multiplexed spatial stream. Methods also include selecting, using the processing device, at least two antennas from the plurality of combinations of antennas that have the closest values of quality metrics to each other, wherein the plurality of combinations of antennas comprises antennas associated with different streams included in the multiplexed spatial stream.

Enhancement of range and throughput for multi-antenna wireless communications devices

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.

Systems, methods, and devices for channel interference detection in wireless devices

Implementations disclosed describe systems and methods to optimize allocation of wireless subcarriers to station devices in wireless networks. In an example implementation, the disclosed techniques may include determining, by a station device in a wireless network, that a current set of wireless subcarriers, allocated by an access point device of the wireless network for the station device, is to be changed, generating, by the station device, a feedback information characterizing a current state of one or more of the wireless subcarriers, and sending, by the station device, the feedback information to the access point device.

Autonomous feedback for efficient allocation of wireless subcarriers

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.

WLAN decodability-based frame processing for power saving

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.

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.

Method for IOT device to stagger TX and save power

Method for IoT device to stagger TX and save power

A method for reducing channel sounding overhead in a MU-MIMO WLAN system, and apparatus for performing the method are disclosed. The method includes transmitting a sparse set of pilot symbols in a pseudorandom distribution across a plurality of subcarriers, from a plurality of antennas to one or more client devices on a plurality of spatial streams; receiving a sparse set of channel estimates in the frequency and spatial domains, from the one or more client devices as beamforming feedback based on the sparse set of pilot symbols; and recovering the channel in a compressed sensing framework.

Reduced channel-sounding in MU-MIMO WLANS

Devices, systems and methods generate a packet including a first preamble and a narrow band packet. Embodiments assign a first frequency band to the first preamble and assign a second frequency band to the narrow band packet. The second frequency band is a first sub-band of the first frequency band. Embodiments transmit the packet by transmitting the first preamble across the first frequency band and transmitting the narrow band packet across the second frequency band. The narrow band packet includes a second preamble and narrow band packet data.

Devices, systems and methods for narrow band communications within protocol having frequency multiplexing

Embodiments can include methods, devices and systems which can transmitting a preamble across a first channel according to a first communication protocol; sequentially transmitting signal values in a plurality of narrow bands; monitoring the narrow bands for response communications; and upon detecting response communications on at least one of the narrow bands, establishing communications across at least one of the narrow bands. Each narrow band can be a different portion of the first channel.

Devices, systems and methods for extending the range of a wireless communication system

Implementations disclosed describe systems and methods to optimize delivery of channel state information in wireless networks. In one implementation, a beamformee device may comprise a plurality of antennas, to receive radio frequency signals, a radio circuit coupled to the plurality of antennas, the radio circuit to generate strength indicators of the received radio frequency signals, and a processor to determine, based on the strength indicators, a first set of feedback parameters characterizing signal transmission received by each of the plurality of antennas, generate a sparse set of feedback parameters from the first set of feedback parameters, generate a second set of feedback parameters with elements of the sparse set that exceed a threshold value, and cause the radio circuit to transmit the second set of feedback parameters.

Method for optimizing channel sounding feedback in MIMO systems

According to embodiments, methods, devices and systems can include monitoring all of a first channel for a first monitoring period. After the first monitoring period, monitoring at least one narrow band for at least a first narrow band signal. In response to detecting the first narrow band signal, establishing a network connection over the narrow band, wherein the at least one narrow band has a frequency range less than one half that of the first channel.

Devices, systems and methods for wireless communication system employing overlapping frequency bands

According to embodiments, methods, devices and systems can include generating packet data for a narrow band packet. Transmitting first preamble data across a first channel followed by the narrow band packet with a second preamble across at least one resource unit (RU). The RU can have a smaller bandwidth than the first channel and occupy a portion of the first channel. The first preamble can be configured to enable detection of a packet transmitted in the first channel, and the second preamble is configured to enable detection of a packet transmitted in the RU without the first preamble.

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Bengaluru, India

Prasanna Kumar Sethuraman