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.

Embodiments of systems/methods are disclosed wherein a transmitter is configured to wirelessly communicate with a destination device by transmitting a first plurality of subcarriers using a first set of frequencies and a first air interface; and responsive to a size of data that is to be transmitted, transmitting a second plurality of subcarriers using a second set of frequencies and a second air interface that comprises a variant of the first air interface. 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.

System/methods of Carrier Aggregation are disclosed. According to some embodiments, a system/method comprises a first transmitter and a second transmitter, that are connected therebetween, and configured to perform operations comprising: wirelessly transmitting to a destination device first data via the first transmitter, using frequencies that are allocated for use by cellular communications; and, responsive to a size of data that is to be transmitted to the destination device and responsive to a distance between the destination device and the second transmitter, wirelessly transmitting to the destination device second data via the second transmitter, using frequencies that are allocated for use by cellular communications; wherein, according to some embodiments, the first transmitter uses a first air interface and the second transmitter uses a second air interface that comprises a variant of the first air interface.

A user terminal configured to communicate with a radio base station includes a processor that configures a number of resource blocks used in a format for an uplink control signal; and a transmitter that transmits to the radio base station the uplink control signal using the format comprising the configured number of resource blocks.

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).

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.

Systems/Methods are provided comprising a smartphone that communicates with a first wearable device and also communicates with a second wearable device; wherein the smartphone is further configured to wirelessly receive results of measurements performed by the first wearable device using a Bluetooth technology and to wirelessly receive results of measurements performed by the second wearable device via an unlicensed band of frequencies using a technology that is based on Bluetooth or not. According to some embodiments, the smartphone is further configured to augment results of the measurements received from the first and second wearable devices with respective additional information that is associated therewith. According to further embodiments, the smartphone receives results of measurements performed by the first and second wearable devices concurrently therefrom.

A transmitter and a method therein, configured for generating a synchronization signal for Device-to-Device (D2D) communication utilizing a Single Carrier-Frequency Division Multiple Access (SC-FDMA) waveform. The method includes determining, by a transmitter, a synchronization sequence d.sub.u[l] modulating a set of subcarriers, where |d.sub.u[l]|=|d.sub.u[L?1?l]|, l=0, 1, . . . , L?1, and |d.sub.u[l]=K, for a positive constant K, where u is a root index and L is a length of the synchronization sequence d.sub.u[l]. The method further includes selecting the root index u from a set of root indices, and generating a synchronization signal for D2D communication utilizing an SC-FDMA waveform based on the determined synchronization sequence d.sub.u[l] and the selected root index u.

A transmission apparatus includes a data-block generating unit that generates and outputs a data block including fixed sequence symbols whose signal values are formed of a fixed sequence and data symbols, a pilot-block generating unit that generates and outputs a pilot block including the fixed sequence symbols and pilot symbols that are fixed symbols known on a reception side, and an output control unit to which the data block and the pilot block are inputted, which controls whether the data block or the pilot block is outputted.

System/methods of Carrier Aggregation are disclosed. According to some embodiments, a system/method comprises a first transmitter and a second transmitter, that are connected therebetween, and configured to perform operations comprising: wirelessly transmitting to a destination device first data via the first transmitter, using frequencies that are allocated for use by cellular communications; and, responsive to a size of data that is to be transmitted to the destination device and responsive to a distance between the destination device and the second transmitter, wirelessly transmitting to the destination device second data via the second transmitter, using frequencies that are allocated for use by cellular communications; wherein, according to some embodiments, the first transmitter uses a first air interface and the second transmitter uses a second air interface that comprises a variant of the first air interface.