Abstract: An expansion bridge chip for a modular chip system includes at least one upstream interface for communicating with an application processor module, a plurality of downstream interfaces for communicating with peripheral modules, and an upstream address decoder on each interface for directing data on the upstream interface to a downstream interface. In such an expansion bridge chip, each upstream interface may have a first bandwidth, each downstream interface may have a respective bandwidth, and the expansion bridge chip may be balanced, such that a sum of all respective bandwidths of the plurality of downstream interfaces is equal to the first bandwidth. Alternatively, each upstream interface may have a first bandwidth, each of the downstream interfaces may have a respective bandwidth, and the expansion bridge chip is unbalanced, such that a sum of all respective bandwidths of the plurality of downstream interfaces exceeds the first bandwidth, and interfaces contend for bandwidth.

Abstract: A method for adjusting an arrival time of a first orthogonal frequency division multiplex (OFDM) data unit of an uplink multi-user (MU) data unit is described. Respective round trip times (RTTs) are determined by a first communication device for multiple communication devices that communicate with the first communication device. A first time offset for a second communication device of the multiple communication devices is determined by the first communication device based on the respective RTTs. The first OFDM data unit is to be transmitted by the second communication device. A first timing control message that indicates the first time offset is generated by the first communication device. The first timing control message is caused by the first communication device to be transmitted to the second communication device.

Abstract: A receiver includes a channel estimation module, a delay spread module, and a smoothing module. The channel estimation module generates a channel estimate for a channel in frequency domain based on a signal received through the channel in time domain. The delay spread module determines a delay spread of the channel in the time domain. The delay spread is an amount of time after which a channel response drops to less than or equal to a predetermined threshold. The smoothing module smooths the channel estimate by applying a filter with unequal taps in the frequency domain. The taps are based on the delay spread. The filter does not attenuate samples of the channel response within the delay spread in the time domain. The filter attenuates noise outside the delay spread of the channel.

Abstract: Systems and methods described herein provide a method for operation, administration and maintenance (OAM) of data message transmission. The method comprises reading a transmit register of a transmitter associate with a first management entity to determine a transmit status of the transmit register. The method further comprises loading a data message into the transmit register when the transmit status of the transmit register indicates availability. The method further comprises embedding the data message as an out-of-band message with physical code sublayer modulation, and transmitting the out-of-band message on the physical code sublayer to a receiver associated with a second management entity. A transmit state machine of the transmitter and a receive state machine of the receiver establish a handshake to allow the out-of-band message to be passed asynchronously.

Abstract: Embodiments described herein provide a method for performing beamforming in a multiple-user-multiple-input-multiple-output (MUMIMO) system. At a MUMIMO access point, MUMIMO data may be received from a station of a plurality of stations. Uplink channel state information may be obtained, from the MUMIMO data, representing an uplink channel between the station and the MUMIMO access point. The uplink channel includes signals transmitted from the station using the second number of antennas. Downlink channel state information may be computed, based on the uplink channel state information, representing a downlink channel between the MUMIMO access point and the station.

Abstract: A system includes a modulator to modulate data using Quadrature Phase Shift Keying modulation and dual sub-carrier modulation to generate modulated symbols for transmission on a plurality of subcarriers. A repetition module repeats the modulated symbols from a first half of the plurality of subcarriers to a second half of the plurality of subcarriers. A phase rotation module rotates phase of the modulated symbols on selected subcarriers of the second half of the plurality of subcarriers. The selected subcarriers include all of the second half of the plurality of subcarriers. The phase rotation module rotates the phase of the modulated symbols on all of the second half of the plurality of subcarriers to conjugate the modulated symbols on all of the second half of the plurality of subcarriers relative to corresponding modulated symbols on all of the first half of the plurality of subcarriers.

Abstract: A network device determines that a frame priority of a received frame is a value corresponding to an audio video bridging (AVB) communication protocol. When the network device determines that a destination address of the frame is not included in a database having network addresses, the network device prevents the frame from being transmitted according to the AVB communication protocol, including either (i) dropping the frame, or (ii) transmitting the frame only from a first set of one or more ports of the network device according to a communication protocol that is different than the AVB communication protocol. When the network device determines that the frame is permitted to be transmitted according to the AVB communication protocol, the network device transmits the frame from a second set of one or more ports according to the AVB communication protocol.

Abstract: A network interface of a wireless network device generates a cyclic redundancy check (CRC) sequence using information bits of a signal field of a physical layer (PHY) preamble of a PHY data unit, including generating the CRC sequence using a CRC polynomial. The network interface generates a CRC field to be included in the signal field, including generating the CRC field to include a portion of the CRC sequence. The network interface generates the PHY data unit to include the PHY preamble, the PHY preamble having the signal field, the signal field having the information bits and the CRC field that includes the portion of the CRC sequence, where the PHY data unit is generated such that the signal field does not include the entire CRC sequence. The network interface generates a transmission signal for transmission in the wireless network, the transmission signal corresponding to the PHY data unit.

Abstract: Aspects of the disclosure provide methods and an electronic device for wireless communication. A method includes transmitting, by a first transceiver, control packets via a first wireless communication channel using a first radio access technology. The method includes determining, by processing circuitry, a first parameter indicating an interval between transmissions of the control packets. Further, the method includes determining, based on the first parameter, a size limit for packets to be received by a second transceiver that is configured to receive the packets via a second wireless communication channel using a second radio access technology. The method includes transmitting, by the second transceiver, information indicating the size limit over the second channel so that sizes of the packets sent by the second radio access technology are such that the packets are received by the second transceiver in a time period within the interval between the transmissions of the control packets.

Abstract: Embodiments described herein provide methods and systems for adaptively controlling uplink communications parameters of a receiving station by an access point. In some embodiments, the uplink power and/or uplink rate of a receiving station is controlled by the access point based on uplink RSSI and/or SNR measurements of uplink packets sent by the receiving station to the access point. For example, the access point may adjust a target RSSI value based on the uplink RSSI and/or SNR measurements of uplink packets in the allocated resource unit. The adjusted target RSSI value is sent to the receiving station in a trigger frame from the access point and the receiving station may then set the uplink transmission power based on the target RSSI value.

Abstract: The present disclosure includes systems and techniques relating to wireless local area network devices. Systems and techniques include multiplexing information for a single wireless communication device onto multiple radio pathways to produce a data packet, operating the multiple radio pathways to generate different portions of the data packet, and transmitting the data packet to the single wireless communication device by concurrent transmissions of the different portions of the data packet over different wireless channels.

Abstract: A hybrid storage device includes at least a first storage device operating under a first storage interface protocol, at least a second storage device operating under a second storage interface protocol, and a drive controller interface. The drive controller interface has a front-end for connecting to a host via a host interface protocol, a back-end for connecting to the first storage device via the first storage interface protocol, and to the second storage device via the second storage interface protocol, and a respective translation module for translating between the host interface protocol and a respective one of the first and second storage interface protocols. The hybrid storage device may be included in a hybrid storage system with a host processor. The host interface protocol may be the same as one of the first and second storage interface protocols, such as NVMe. The protocols may be implemented in hardware or software.

Abstract: Aspects of the disclosure provide a method of determining frame timing of one or more signals from one or more respective transmitters. The method determining first observation windows that correspond to first candidate segments of the one or more signals; calculating a first set of accumulated signal patterns, each accumulated signal pattern of the first set of accumulated signal patterns being calculated based on signal patterns in a respective subset of the first candidate segments of the one or more signals; determining whether a first set of accumulated synchronization words derived from the first set of accumulated signal patterns is consistent with a first set of corresponding benchmark synchronization words; and determining the frame timing of the one or more signals based on timing of the first observation windows when the first set of accumulated synchronization words is consistent with the first set of corresponding benchmark synchronization words.

Abstract: Aspects of the disclosure provide an apparatus for wireless communication. The apparatus includes a transceiver and a processing circuit. The transceiver is configured to transmit and receive wireless signals. The processing circuit is configured to detect an error of a previous scheduled transmission of data units from the apparatus to another apparatus. The other apparatus provides scheduled resources for transmission between the two apparatuses. Further, the processing circuit is configured to determine resources that are scheduled by the other apparatus for the apparatus to perform retransmission, and provide one or more of the data units in the previous scheduled transmission to the transceiver for retransmission using the scheduled resources.

Abstract: Aspects of the disclosure provide a system for detecting a movement that includes a moving state detector, a profile-based movement state detector, and a refined movement state detector. The moving state detector is configured to generate a moving state based on a detected speed. The profile-based movement state detector is configured to determine an estimated movement state based on the moving state and detected accelerations. The refined movement state detector is configured to generate, in response to the estimated movement state corresponding to a predetermined triggering movement state, a refined movement state based on a detected angular velocity.

Abstract: The present disclosure describes techniques and apparatuses for device-to-device radio frequency proximity determination. These techniques, in contrast to conventional cellular and GPS services, can accurately locate mobile devices at relatively low cost. In some aspects, three or more mobile communication devices communicate radio frequency ranging signals and, using information about these signals, a distance and direction between two of the devices is determined. In some other aspects, two mobile communication devices communicate radio frequency ranging signals separated in time, and after movement of one of the mobile communication devices. Using information about these two signals, a distance and direction between the two devices is determined.

Abstract: System and methods described herein includes a method for iterative decoding. The method includes instantiating an iterative decoding procedure to decode a codeword. At each iteration of the iterative decoding procedure, the method further includes retrieving information relating to a plurality of current decoding variables at a current iteration, determining a first current decoding variable to be skipped for the current iteration based on the information, and processing a second decoding variable without processing the first decoding variable to update related decoding variables from the plurality of current decoding variables.

Abstract: The present disclosure describes methods and apparatuses for implementing virtual dynamic library loading in embedded systems. In some aspects, a determination is made that a feature is not available in firmware executed from a first memory. Based on information associated with the feature, a portion of a second memory is allocated for code of the feature. In some cases, the portion of the second memory is allocated from a data buffer or part of a shared memory. The code of the feature is loaded to the allocated portion of the second memory and address aliasing logic is configured enable execution of the feature from the second memory. By allocating and executing firmware features from the second memory, a size of the firmware executed from the first memory can be reduced to conserve memory space and other firmware features may be dynamically loaded and executed from the second memory.

Abstract: Systems and methods described herein provide a system for transmitting data on an MIMO channel using a STBC. The system comprises a wireless transmitter. The wireless transmitter obtains plurality of data symbols to transmit, and performs data padding for the plurality of data symbols based on a non-STBC manner. The wireless transmitter further calculates a number of bits per data symbol after the data padding and pre-codes a data symbol from the plurality of data symbols based on available channel information when the number of data symbols is an odd number. The wireless transmitter generates an STBC based on the pre-coded data symbols, and transmits the generated STBC to the MIMO channel.

Abstract: The present disclosure includes systems and techniques relating to wireless local area network devices. A described technique include accessing a data stream intended for transmission to a single wireless communication device; multiplexing the data stream to two or more radio pathways to produce a data packet; generating, via the two or more radio pathways, two or more different portions of the data packet based on an aggregated capacity of two or more wireless channels that are associated with the two or more radio pathways, the two or more radio pathways being respectively configured to use two or more groups of orthogonal frequency division multiplexing (OFDM) subcarriers to generate the two or more different portions of the data packet; and transmitting the data packet to the single wireless communication device by concurrent transmissions of the two or more different portions via the two or more wireless channels.