Abstract: Devices and methods are disclosed for generating, filtering, and amplifying signals that are sent and received using SOCs. These improved methods and devices advantageously provide filtering of composite RF signals such that the RF signals can be transmitted with an improved SNR. Such filtered signals can then be transmitted at a higher power. Because filtering is performed at an intermediate frequency, the higher cost of low-noise RF-transmitters and/or RF filtering components can be avoided. Accordingly, less expensive (e.g., noisier) components, such as readily available wireless transceiver SOCs, can be used for generating RF signals, filtering the signals, and then transmitting the filtered signals at higher power. As a result of these devices and methods, inexpensive SOCs may be used at higher powers and over longer ranges than would be normally expected.

Abstract: The present invention relates to a method and a transcoder arrangement of transcoding a bitstream representing an original video source from an input format to an output format. The method comprises the steps of receiving (S10) the bitstream with the input video format, wherein the input video format is a high fidelity format; and receiving (S20) side information related to said video bitstream. Said side information comprising at least: a video bitstream representing the original video source with a low fidelity input video format, coding parameters optimized based on knowledge of the original video source; transform coefficients, indicative of a residual between the original video source and a decoded version of the high fidelity format.

Abstract: An improved receiver design implements a practical method for modeling users in SIC turbo loop multiuser detection architectures, wherein in each loop unsubtracted estimation errors from previous loops are used to appropriately scale the error covariance matrix for each user, thereby accurately representing the remaining residual interference in the data stream for each desired user. The effect of estimation errors in previous interference cancellation operations is thereby minimized, and symbol estimations in successive turbo loops are improved, for example during multiuser MMSE, multiuser MMSE with interference rejection combining (MMSE-IRC), sample matrix inversion (SMI), or any of their adaptive variants (least mean-square, recursive least square, Kalman filter etc.). The estimated residual symbol energy can be computed per symbol, and then applied to entire data streams, to groups of symbols, or to each symbol separately.

Abstract: A demodulation apparatus demodulates spectrum-spread received data, and includes a band variable filter removing noise components from despread received data, a power conversion unit converting each sample value of received data after removing noise components to a power value, a cyclic addition unit cyclically adding the power value in bit periods of received data, a maximum-value detection/average-level measurement unit detecting a maximum value from a cyclic-addition result of the cyclic addition unit, an estimation unit estimating a spreading-code timing and a carrier frequency based on maximum-value information detected by the maximum-value detection/average-level measurement unit, a spreading-code generation unit generating a spreading code with a timing according to an estimation result of a spreading-code timing obtained by the estimation unit, and a local-signal generation unit setting a local-signal frequency according to an estimation result of a carrier frequency obtained by the estimation unit.

Abstract: A protective case for a mobile device such as a tablet computer is disclosed that includes modular components that can be mixed and matched by the user at the point of purchase to facilitate creation of a user customizable look. The case includes a shell that is configured to retain the tablet device and a front cover that is configured to protect and conceal the screen of the tablet when the case is in the closed position. When the assembled case is in the open position and the tablet is retained within the shell, the cover is configured to stand the shell up on edge. The shell and front cover can be reversibly attached to one another by the user, so that the user can select a shell of one color, material, design, or style and a front cover of another color, material, design or style. Retention tab and slot are employed to reversibly lock the front cover to the shell to form a seamless integrated multi use mode case.

Abstract: A two-point phase modulator comprising a phase locked loop, PLL, having a voltage controlled oscillator, VCO, and a feedback path, a first modulation circuit for introducing a first modulation signal into the feedback path, the first modulation circuit generating the first modulation signal using a reference clock signal extracted from the PLL and derived from a first clock, a second modulation circuit for introducing a second modulation input into the VCO, the second modulation circuit generating the second modulation signal using a clock signal generated independently of the reference clock and a synchronizer for aligning the second modulation signal in time with the first clock signal.

Abstract: A method and an apparatus for receiving broadcast signals thereof are disclosed. The apparatus for receiving broadcast signals, the apparatus comprises a receiver to receive the broadcast signals, a demodulator to demodulate the received broadcast signals by an OFDM (Orthogonal Frequency Division Multiplex) scheme, a frame parser to parse a signal frame from the demodulated broadcast signals, a time deinterleaver to time deinterleave data in the parsed signal frame and a decoder to decode the time deinterleaved data.

Abstract: A Faster-Than-Nyquist (FTN)-based transmitting apparatus segments an input data bit string into a plurality of partial bit strings, simultaneously channel-encodes each of the plurality of partial bit strings, simultaneously modulates each of the plurality of channel encoded bit strings to generate a plurality of modulation symbol sequences, and then pulse-shapes and transmits the plurality of modulation symbol sequences at a speed faster than a Nyquist rate.

Abstract: A clock circuit includes a selector circuit connected to an output terminal, first, second, and third paths connected in parallel between an input terminal for receiving an input clock signal and the selector circuit, a first clock signal output from the first path being delayed with respect to a second clock signal output from the second path by a predetermined length of time, and the second clock signal being delayed with respect to a third clock signal output from the third path by the predetermined length of time, and a control circuit configured to control the selector circuit to switch among at least two of the first, second, and third clock signals.

Abstract: Methods and devices are provided for processing a received communication signal by a UE using an analog complex filter and using a single analog-to-digital converter (ADC). A control channel of the communication signal may be decoded to determine the frequency range in which a payload channel is located. The UE may then demodulate only the frequency range containing the payload channel. A complex representation of the received payload channel may be provided to the analog complex filter, with the payload channel shifted to a non-zero frequency IF. The analog complex filter may attenuate any portion of the complex representation that falls near ?IF. The UE may then convert only one component path of the filtered complex representation to a digital signal. A complex representation of the digital signal may then be generated, with the payload channel shifted to DC.

Abstract: A time-domain equalizer for eliminating an echo signal from a received signal is provided. The received signal includes an original signal and the echo signal. The time-domain equalizer includes a time delay estimator, an amplitude amplifying ratio estimator and a phase shift estimator. The time delay estimator determines a delay amount maximizing a cost function to serve as an estimated delay amount of the echo signal relative to the original signal. The amplitude amplifying ratio estimator determines an estimated amplitude amplifying ratio of the echo signal relative to the original signal. The phase shift estimator determines an estimated phase shift of the echo signal relative to the original signal according to the estimated delay amount. The estimated delay amount, the estimated amplitude amplifying ratio and the estimated phase shift are used to set a filtering condition to be applied to the received signal.

Abstract: A method of operating a long term evolution (LTE) communication system on a shared frequency spectrum is disclosed. A user equipment (UE) is initialized on an LTE frequency band. A base station (eNB) monitors the shared frequency spectrum to determine if it is BUSY. The eNB transmits to the UE on the shared frequency spectrum if it is not BUSY. The eNB waits for a first time if it is BUSY and directs the UE to vacate the shared frequency spectrum after the first time.

Abstract: A method and apparatus are configured to recognize mobile terminals positioned within a coverage area for short range communication with a user-specific device, wherein each mobile terminal comprises identification information for the user-specific device. The method and the apparatus provide a customized service corresponding to at least one of the mobile terminals.

Abstract: The apparatus includes a transmission signal divider for dividing and transmitting a received signal to a transmission antenna and an attenuator, an attenuator for applying a predetermined attenuation factor to the transmitted signal divided to the attenuator, a phase shifter for phase-shifting the signal to which the attenuation factor is applied by a predetermined phase, and a time delayer for time-delaying the phase-shifted signal by a predetermined time.

Abstract: A method is presented for receiving broadcast signals. The broadcast signals are received. The received broadcast signals are demodulated by an Orthogonal Frequency Division Multiplex (OFDM) scheme. A signal frame is parsed from the demodulated broadcast signals. Data in the parsed signal frame is bit interleaved. The bit deinterleaving includes block deinterleaving the data with each set of a number of bit groups. The number of bit groups is based on modulation type. When the modulation type is 16 Quadrature Amplitude Modulation (QAM), the number of bit groups is 4. The block deinterleaved data is group-wise deinterleaved by a unit of the bit group and parity deinterleaving parity bits of data in the group-wise deinterleaved data. The bit deinterleaved data is decoded.

Abstract: Good transmission performance is obtained even when the difference between the number of transmit antennas and the number of receive antennas is small. A modulation symbol is subjected to spreading and code multiplexing in a receive antenna direction of a terminal device, is subjected to precoding, and is transmitted. A spreading ratio of a spreading code for performing the spreading in the receive antenna direction is equal to the number of receive antennas of the terminal device. Spreading code multiplexing is performed in the receive antenna direction. Thus, it is possible to provide a base station apparatus and a terminal device providing good transmission performance by changing the number of multiplexing operations even when the difference between the number of transmit antennas and the number of receive antennas is small.

Abstract: A communication system and method is provided for handling emergencies wherein public safety radios are used to directly communicate with normally incompatible radios used by organizations such as schools. The system includes a radio communication bridge that is selectively activated by emergency personnel to contact an organization undergoing an emergency. The bridge is activated via a TCP/IP command over an IP network or alternatively sent by a pre-programmed digital radio. Computer software or firmware at communication endpoints, emergency responder locations, and at an emergency call center facilitates functionality of the system to include emergency notifications, dissemination of information associated with a particular emergency, and the status of the system to include activation and deactivation of the radio bridge.

Abstract: Provided are a wireless communication method based on multiple-user multi-input multi-output (MU-MIMO) and a corresponding user equipment and eNode B. According to the present disclosure, a first MU-CQI offset corresponding to a first co-scheduled PMI which is fully orthogonal with a desired PMI is reported with a larger number of bits than a second MU-CQI offset corresponding to a second co-scheduled PMI which is not fully orthogonal with the desired PMI. Alternatively, a first MU-CQI offset corresponding to a first co-scheduled PMI is reported with a first number of bits, and a second MU-CQI offset corresponding to a second co-scheduled PMI which is correlated with the first co-scheduled PMI is reported with a second smaller number of bits or even not reported.

Abstract: A quantum mechanical radio frequency (RF) signaling system includes a transmission line that receives and conducts an RF pulse signal operating at a radio frequency, a first qubit having a quantum mechanical state that is a linear combination of at least two quantum mechanical eigenstates, and a first network of reactive electrical components having an input that is coupled to the transmission line for receiving the RF pulse signal and an output that is coupled to the first qubit. The first network of reactive electrical components attenuates the amplitude of the RF pulse signal and produces a first attenuated RF pulse signal that is applied to the first qubit. The first attenuated RF pulse signal operates at the radio frequency and has a first attenuated amplitude that causes a predefined change in the linear combination of at least two quantum mechanical eigenstates within the first qubit.

Abstract: Some demonstrative embodiments include apparatuses, devices, systems and methods of communicating a wakeup packet. For example, an apparatus may include circuitry configured to cause a first wireless device to modulate a preamble of a wakeup packet according to an Orthogonal Frequency Division Multiplexing (OFDM) scheme; modulate a payload of the wakeup packet according to an On-Off keying (OOK) modulation scheme over a plurality of OFDM tones; and transmit the wakeup packet to a second wireless device.