Techniques are described for wireless communication. One method includes searching for a synchronization channel on a first raster point of a frequency raster identified for synchronization channel transmission. The frequency raster includes a plurality of raster points in a radio frequency spectrum. The method also includes identifying a pull-in signal on the first raster point; determining, from the pull-in signal, a second raster point of the frequency raster on which the synchronization channel is transmitted; and receiving the synchronization channel on the second raster point. Another method includes transmitting the pull-in signal and the synchronization channel.

A transmitting apparatus includes a first signal generating unit that generates, on the basis of data a first signal transmitted by single carrier block transmission; a second signal generating unit that generates, on the basis of an RS, a second signal transmitted by orthogonal frequency division multiplex transmission; a switching operator that selects and outputs the second signal in a first transmission period and selects and outputs the first signal in a second transmission period; an antenna that transmits the signal output from the switching operator; and a control-signal generating unit that controls the second signal generating unit such that, in the first transmission period, the RS is arranged in a frequency band allocated for transmission of the RS from the transmitting apparatus among frequency bands usable in OFDM.

Systems/methods are disclosed wherein a transmitter is used to convey information to a destination device by wirelessly transmitting using first frequencies; and, responsive to a size of data that is to be transmitted, wirelessly transmitting using second frequencies; wherein at least some of the second frequencies differ from the first frequencies. In some embodiments, the transmitter comprises first and second transmitters that convey information to the destination device by wirelessly transmitting by the first transmitter first data using first frequencies and, responsive to the size of data to be transmitted, wirelessly transmitting by the second transmitter second data using second frequencies. According to some embodiments, the first and second data are transmitted simultaneously in time. According to further embodiments, a smartphone comprises the transmitter or the first and second transmitters. According to additional embodiments, a base station comprises the transmitter or the first and second transmitters.

Inventive concepts and embodiments associated therewith are provided wherein an auxiliary device, that is attached to a person, is configured to function in cooperation with a destination device that is on the person. In some embodiments, the auxiliary device is uniquely associated with specific information that is to be conveyed to the destination device following reception of a signal by the auxiliary device. Embodiments are disclosed wherein, following reception of the signal by the auxiliary device, the auxiliary device processes the signal and then conveys the specific information that is uniquely associated therewith to the destination device without direct human interaction with the auxiliary device. In some embodiments, the auxiliary device comprises a personal wearable device and the destination device comprises a smartphone.

A user equipment (UE) is described that includes receiving circuitry configured to receive, from a base station apparatus, a radio resource control message including first information used for configuring a periodicity for an uplink data transmission, the receiving circuitry configured to receive on a physical downlink control channel, from the base station apparatus, second information used for indicating an activation for the uplink data transmission. Transmitting circuitry is configured to transmit, to the base station apparatus, confirmation information Medium Access Control (MAC) Control Element (CE) for the second information, the transmitting circuitry configured to perform on a physical uplink shared channel, to the base station apparatus, the uplink data transmission based on the first information and the second information. The receiving circuitry is also configured to receive on the physical downlink control channel, from the base station apparatus, third information used for indicating a deactivation for the uplink data transmission.

Embodiments of systems/methods are disclosed wherein a transmitter is configured to wirelessly communicate with a destination device by transmitting to the destination device a first plurality of subcarriers using a first set of frequencies and, responsive to a size of data that is to be transmitted to the destination device, transmitting to the destination device a second plurality of subcarriers using a second set of frequencies. According to some embodiments, the first set of frequencies and/or the second set frequencies comprise frequencies that are used for cellular communications and at least some frequencies of the second set of frequencies are mutually exclusive with the first set of frequencies.

Embodiments of systems/methods are disclosed wherein an auxiliary device, that is attached to a person, is configured to function in cooperation with a smartphone that is used by the person. According to some embodiments, over a first interval of time, the auxiliary device comprises a first auxiliary device that is configured to perform first monitoring or measurements and is further configured to wirelessly transmit information to the smartphone comprising results of said first monitoring or measurements. Further, over a second interval of time, the auxiliary device comprises a second auxiliary device, that is physically distinct from the first auxiliary device, is configured to perform second monitoring or measurements and is further configured to wirelessly transmit information to the smartphone comprising results of said second monitoring or measurements. According to some embodiments, the second auxiliary device comprises at least some functionally that is similar to at least some functionality of the first auxiliary device.

Embodiments of systems/methods are disclosed wherein a transmitter is configured to wirelessly communicate with a destination device by transmitting to the destination device a first plurality of subcarriers using a first set of frequencies and, responsive to a size of data that is to be transmitted to the destination device, transmitting to the destination device a second plurality of subcarriers using a second set of frequencies. According to some embodiments, the first set of frequencies and/or the second set frequencies comprise frequencies that are used for cellular communications and at least some frequencies of the second set of frequencies are mutually exclusive with the first set of frequencies.

A transmitter is configured to convey N bits of information and L bits of information, for a total of N+L bits of information, to a destination device via an auxiliary device. The transmitter is configured to select, from a plurality of auxiliary devices that are respectively associated with different possible states of the L bits of information, an auxiliary device that is associated with a state of the L bits of information to be conveyed. L may be ?1. The transmitter is also configured to convey the N+L bits of information from the transmitter to the destination device via the selected auxiliary device, without the transmitter transmitting any of the L bits of information to the destination device or the selected auxiliary device, by transmitting a signal to the selected auxiliary device. This signal comprises the N bits of information. N may be ?0.

Systems and methods for canceling carrier frequency offset (CFO) and sampling frequency offset (SFO) in a radio receive chain are disclosed. In one embodiment, a method is disclosed, comprising: receiving a sub-frame via a radio receive chain in a time domain; performing per-user filtering on the sub-frame to obtain a signal for a particular user; obtaining a CFO correction signal; adding the CFO correction signal in the time domain to perform a CFO correction step on the signal for the particular user; performing an FFT on the output of the CFO correction step to obtain samples in a frequency domain; adding an SFO correction signal in the frequency domain to perform an SFO correction to the output of FFT step; and demodulating the output of SFO correction step, thereby performing CFO and SFO correction while reducing inter-carrier interference (ICI).