Disclosed are a method for generating a pilot pattern and an apparatus thereof. The method for generating a pilot pattern for MIMO antennas includes: determining a size of a slot that is an interval where a pilot pattern is repeated in a time domain and a frequency domain; determining a pilot inserting position of OFDMA symbols included in a slot determined for a first antenna; and determining a pilot inserting position of OFDMA symbols included in a slot determined for a second antenna, in order to have a sub-carrier different from a sub-carrier of the pilot inserting position of the OFDMA symbols included in the slot determined for the first antenna.

A wireless power transmission apparatus includes: a transmitter that wirelessly transmits electric power; and a receiver that can receive, in a resonant relation with the transmitter, a transmission signal including the electric power transmitted from the transmitter, wherein the receiver includes a frequency variable unit that can change a reception resonant frequency; a detecting unit that detects reception power; and a control unit that controls the frequency variable unit to perform frequency adjustment such that the reception power detected by the detecting unit is maximized.

A wireless power transmission apparatus includes: a transmitter that wirelessly transmits electric power; and a receiver that can receive, in a resonant relation with the transmitter, a transmission signal including the electric power transmitted from the transmitter, wherein the receiver includes a frequency variable unit that can change a reception resonant frequency; a detecting unit that detects reception power; and a control unit that controls the frequency variable unit to perform frequency adjustment such that the reception power detected by the detecting unit is maximized.

A system and method are described for adjusting communication with a first distributed-input-distributed-output (DIDO) client as the first DIDO client moves from a first DIDO cluster to a second DIDO cluster: For example, in one embodiment of the system and method, different signal strength thresholds are specified and either conventional DIDO precoding and/or DIDO precoding with inter-DIDO-cluster interference (IDCI) cancellation to avoid RF interference at the DIDO client are employed based on measured signal strengths from a main DIDO cluster and an interfering DIDO cluster.

A communication device includes a Session Management Module (SMM) that controls data that is communicated via a first communication link and the data that is communicated via a second communication link and causes the following steps to be performed: discovering a second device via a first communication link, establishing a communication session between the communication device and the second device over a first subset of the communication links (the selection of the first subset of the communication links is a function of a communication link selection rule), exchanging a first type of data over the at least one of the first subset of communication links (the at least one of the first subset of communication links is selected in accordance with a communication link data selection rule), and ending the communication session between the communication device and the second device.

Various examples are provided for OOB interference and/or PAPR reduction in OFDM systems. In one example, a method includes generating a suppressing signal using channel state information (CSI) of a communication channel, where the length of the suppressing signal equals that of the OFDM symbol including a cyclic prefix (CP) and data portion; combining the OFDM symbol and the suppressing signal to generate a transmission signal, where the length of the suppressing signal is aligned with the length of the OFDM symbol; and communicating the transmission signal via the communication channel, which reduces and substantially aligns the length of the suppressing signal with a length of the CP at a receiving device. The CP and suppressing signal can be removed from the transmitted signal at the receiver using a CP removal matrix. In another example, a transmitting device includes OFDM encoding, signal suppression, combining circuitry to generate the transmission signal.

Systems and methods described herein provide a method for detecting beamformed detecting beam-formed orthogonal frequency division multiplexing (OFDM) packets. The method includes receiving, at a receiver, a data signal including a data packet, and selecting a set of frequency domain tones associated with the data signal for channel estimation. The method further includes calculating a plurality of differential parameters between adjacent frequency domain tones from the set of frequency domain tones. The method further includes identifying a jump when a first differential parameter from the plurality of differential parameters exceeds a jump threshold. The method further includes obtaining an accumulative count of jumps for the set of frequency domain tones, and identifying the data packet is beamformed when the accumulative count exceeds a jump limit.

A transmission method for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. Each signal has been modulated according to a different modulation scheme. The transmission method applies precoding on both signals using a fixed precoding matrix, applies different power change to each signal, and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.

Embodiments include a method, a computing device, and a computer program product. An embodiment provides a method implemented in a computing environment. The method includes receiving a designation of an individualized digital identifier. The method also includes associating a human-perceptible form of the designated individualized digital identifier with each element of a group of human-perceivable elements displayed by the computing environment.

Embodiments include a method, a computing device, and a computer program product. An embodiment provides a method implemented in a computing environment. The method includes receiving a designation of an individualized digital identifier. The method also includes associating a human-perceptible form of the designated individualized digital identifier with each element of a group of human-perceivable elements displayed by the computing environment.