Abstract:
Systems and methods are disclosed to implement non-linear interference cancellation (NLIC) across chips or dies in communication systems to cancel or mitigate self-jamming interference. A victim transceiver may receive an analog baseband transmit (Tx) signal from an aggressor transceiver. The analog baseband Tx signal may be tapped from a digital analog converter (DAC) of the aggressor transceiver. Alternatively, the analog baseband Tx signal may be generated by the aggressor transceiver using an auxiliary down-conversion and filtering stage. The victim transceiver may receive a composite baseband Rx signal from the victim transceiver front-end. The composite baseband Rx signal includes the desired Rx signal and an interference signal. The victim transceiver may sample the analog baseband Tx signal to generate a digital signal replica of the analog baseband Tx signal for the NLIC operation to cancel or mitigate the interference signal present in the composite baseband Rx signal.
Abstract:
Methods, systems, and devices are described for wireless communication. A wireless device may identify an upcoming interference period, determine a receive end time based on when the interference period will begin to disrupt incoming messages, and transmit a scheduling outlook message to a transmitter to schedule around the interference in response to receiving a packet (request-to-send (RTS) or data). The wireless device may hash a receiver address (RA) associated with the packet exchange message such as a clear-to-send message or a block acknowledgement to make room for the scheduling outlook message. An example scheduling outlook field (in the place of the full RA field) may include a shortened RA, a number of supported spatial streams, a supported bandwidth, a set of tone allocation units (TAUs), a receive end time (or receive duration), and an interference level.
Abstract:
A method for identifying a radio access technology by an electronic device is described. The method includes generating, by a first communication circuitry, a first message that identifies a radio access technology. The first message is of a first message type. The method also includes sending, by the first communication circuitry, the first message to a second communication circuitry. The first communication circuitry and the second communication circuitry communicate with each other over a non-radio link. The method further includes sending, by the first communication circuitry, a second message associated with the first message. The second message is of a second message type that is different from the first message type.
Abstract:
Methods, systems, apparatuses, and devices are described for aligning wireless local area network (WLAN) operations with reporting of transmit power information via a cellular network. A mobile device may identify information to be communicated for a WLAN operations. The mobile device may determine a reporting schedule for transmit power information to a serving base station of the cellular network. The information may be communicated on a schedule determined based on the reporting schedule for transmit power information. The information communicated for the WLAN operation may be communicated between subsequent reporting instances for the transmit power information.
Abstract:
A communication device can independently determine an interference magnitude component and an interference phase component for interference cancellation. The interference magnitude component may be estimated based, at least in part, on a magnitude polynomial expansion and a transmit signal of the communication device. The interference phase component may be estimated based, at least in part, on a phase polynomial expansion and the transmit signal. The magnitude polynomial expansion and the phase polynomial expansion may have different polynomial terms. The interference signal may be determined based, at least in part, on the interference magnitude component and the interference phase component. At least a portion of the interference signal may be cancelled from a receive signal received by the communication device.
Abstract:
Systems and methodologies are described that facilitate constructing unitary matrices that may be utilized in linear precoding for multiple-input multiple-output (MIMO) wireless communication systems. Each unitary matrix may be generated by combining (e.g., multiplying) a diagonal matrix with a Discrete Fourier Transform (DFT) matrix. The unitary matrices may be utilized to provide feedback related to a channel and/or control transmission over a channel based upon obtained feedback.
Abstract:
A first receiver of a victim communication device may detect a first signal from an aggressor transmitter that potentially may interfere with a second signal intended to be received at a second receiver of the victim communication device. It may be determined whether the first signal interferes with the second signal based, at least in part, on the characteristics of the first signal and the second receiver. If the first signal may interfere with the second signal, the second receiver may implement reconstruction and cancelation of the interference attributable to the first signal.
Abstract:
Systems and methods are disclosed for coordinating operation of WLAN and ANT systems. A coexistence manager may determine an operating mode of the ANT transceiver and selectively enable and disable the ANT and WLAN transceivers based on the operating mode to reduce the potential for interference.
Abstract:
A method for wireless communication by a wireless communication device is described. The wireless communication device determines that an aggressor radio in the wireless communication device is causing (or can potentially cause) self-jamming to a victim radio in the wireless communication device. A precoding configuration is selected based on one or more link throughput metrics and one or more self-jamming metrics. The precoding configuration is applied to transmissions of the aggressor radio.
Abstract:
A communication control parameter for communicating via one technology is determined based on a communication schedule used in another technology. In some aspects, interference between a wireless local area network and a wireless wide area network is mitigated by appropriate selection of the communication control parameter. In some aspects, enhanced media access control features of IEEE 802.11ah are employed to facilitate co-existence between radio technologies. For example, interference may be mitigated through the use of a restricted access window, a target wake time, sectorized antennas, scheduled control information transmissions, and rate selection for control information.