Abstract: A communication device is provided that includes a receiver configured to receive a radio frequency signal. The communication device further includes a processor configured to determine a shift frequency based on a component radio frequency signal. The processor is configured to determine a second signal based on the radio frequency signal. The component radio frequency signal is based on the radio frequency signal and associated with a frequency related to the radio frequency signal represented in the frequency domain. The second signal is determined based on shifting frequencies related to the radio frequency signal represented in the frequency domain by the shift frequency.

Abstract: A wireless device includes a radio transceiver, and a digital transmitter configured to transmit, via the radio transceiver, a first data symbol, and to transmit, via the radio transceiver, a repetition of the first data symbol immediately after the first data symbol, where the first data symbol forms a cyclic prefix for the repetition of the first data symbol.

Abstract: A wireless device includes a radio transceiver, and a digital transmitter configured to transmit, via the radio transceiver, a first data symbol, and to transmit, via the radio transceiver, a repetition of the first data symbol immediately after the first data symbol, where the first data symbol forms a cyclic prefix for the repetition of the first data symbol.

Abstract: An equalizer includes: a channel estimator configured to generate a set of time-domain channel coefficients based on a receive signal; a frequency-domain transformer configured to generate a set of frequency-domain channel coefficients based on a frequency transform of the set of time-domain channel coefficients; an equalizer coefficient generator configured to generate a set of frequency-domain equalizer coefficients based on the set of frequency-domain channel coefficients; a time-domain transformer configured to generate a set of time-domain equalizer coefficients based on a time transform of the set of frequency-domain equalizer coefficients; and a filter configured to filter the receive signal based on a filter function that is based on the set of time-domain equalizer coefficients.

Abstract: A communication device is provided that includes a receiver configured to receive a radio frequency signal. The communication device further includes a processor configured to determine a shift frequency based on a component radio frequency signal. The processor is configured to determine a second signal based on the radio frequency signal. The component radio frequency signal is based on the radio frequency signal and associated with a frequency related to the radio frequency signal represented in the frequency domain. The second signal is determined based on shifting frequencies related to the radio frequency signal represented in the frequency domain by the shift frequency.

Abstract: A method of controlling a mobile communications device receiver, which includes: activating the receiver, receiving a voice signal divided into a plurality of voice time intervals, detecting a silent voice time interval from content of the received voice signal, and deactivating the receiver during at least a portion of the silent voice time interval. In addition, the method may also include: receiving a signaling signal divided into a plurality of signaling time intervals, detecting an empty signaling time interval from the plurality of signaling time intervals, and deactivating the receiver during at least a portion of the empty signaling time interval.

Abstract: A method (200) for mitigating interference includes: receiving (201) a first signal (y1) comprising a first plurality of multipath transmissions from at least one radio cell at a first antenna port (A) and a second signal (y2) comprising a second plurality of multipath transmissions from the at least one radio cell at a second antenna port (B); generating (202) a first spatial component (h1A) of a first channel coefficient (h1) based on the first signal (y1) and a second spatial component (h1B) of the first channel coefficient (h1) based on the second signal (y2); generating (203) a covariance measure (Ry) based on the first signal (y1) and the second signal (y2); and generating (204) a first spatial component (w1A) of a first weight (w1) for interference mitigation based on the covariance measure (Ry), the first and second spatial components (h1A, h1B) of the first channel coefficient (h1) and a scalar correction value (C).

Abstract: An equalizer includes: a channel estimator configured to generate a set of time-domain channel coefficients based on a receive signal; a frequency-domain transformer configured to generate a set of frequency-domain channel coefficients based on a frequency transform of the set of time-domain channel coefficients; an equalizer coefficient generator configured to generate a set of frequency-domain equalizer coefficients based on the set of frequency-domain channel coefficients; a time-domain transformer configured to generate a set of time-domain equalizer coefficients based on a time transform of the set of frequency-domain equalizer coefficients; and a filter configured to filter the receive signal based on a filter function that is based on the set of time-domain equalizer coefficients.

Abstract: A method (200) of bias cancellation for a radio channel sequence includes: receiving (201) a radio signal, the radio signal comprising a radio channel sequence coded by a first signature, the first signature belonging to a set of orthogonal signatures; decoding (202) the radio channel sequence based on the first signature to generate a decoded radio channel sequence; decoding (203) the radio channel sequence based on a second signature, wherein the second signature is orthogonal to the signatures of the set of orthogonal signatures, to generate a bias of the radio channel sequence; and canceling (204) the bias of the radio channel sequence from the decoded radio channel sequence.

Abstract: A method of controlling a mobile communications device receiver, which includes: activating the receiver, receiving a voice signal divided into a plurality of voice time intervals, detecting a silent voice time interval from content of the received voice signal, and deactivating the receiver during at least a portion of the silent voice time interval. In addition, the method may also include: receiving a signaling signal divided into a plurality of signaling time intervals, detecting an empty signaling time interval from the plurality of signaling time intervals, and deactivating the receiver during at least a portion of the empty signaling time interval.

Abstract: A communication terminal is described comprising a radio frequency receiver configured to receive a signal comprising signal components transmitted via different communication channels, each modulated based on a common modulation symbol shared by the plurality of communication channels, an equalizer for each communication channel configured to equalize the signal received based on respective one or more channel parameters, a demodulator for each communication channel configured to calculate probability information information bits to be equal to a particular binary value, a combiner configured to combine the probability information calculated for the plurality of communication channels and a decoder configured to generate reconstructed useful data based on the combined probability information.

Abstract: A method (200) of bias cancellation for a radio channel sequence includes: receiving (201) a radio signal, the radio signal comprising a radio channel sequence coded by a first signature, the first signature belonging to a set of orthogonal signatures; decoding (202) the radio channel sequence based on the first signature to generate a decoded radio channel sequence; decoding (203) the radio channel sequence based on a second signature, wherein the second signature is orthogonal to the signatures of the set of orthogonal signatures, to generate a bias of the radio channel sequence; and canceling (204) the bias of the radio channel sequence from the decoded radio channel sequence.

Abstract: A method of influencing the mixture formation and charge movement in the cylinders of a piston internal combustion engine, having at least one gas intake valve and at least one gas outlet valve per cylinder. Each of the valves is provided with a fully variable, preferably electrimagnetic, valve drive and is controllable via an electronic control device that is configured such that within predetermined speed ranges and/or for predetermined load conditions, at least some of the gas intake valves and/or the gas outlet valves can be moved, respectively in dependence on the piston stroke, with a stroke course that is variable, relative to the opening and closing moments and/or the opening time, the opening width and/or the opening duration and/or the movement speed.

Abstract: A piston internal combustion engine with at least one gas exhaust valve (2) for each cylinder (1), which is actuated by an actuator (7), in particular an electromagnetic actuator, controlled by a fully variable engine control unit (15). Based on the predetermined operating cycle, the valve can close off the cylinder interior space against a gas exhaust channel (13) that follows the valve seat (3) of the exhaust valve. This channel is connected to an exhaust gas system and is provided with a means for example a constriction (14) for reducing the pressure gradient during the start of the opening of the gas exhaust valve (2). A specific pressure fluctuation is used for a further reduction in the pressure gradient behind the exhaust valves during the opening through a corresponding layout of the pipe geometry and the container volumes in the exhaust gas system or corresponding installed components.

Abstract: A piston internal combustion engine with at least one gas exhaust valve (2) for each cylinder (1), which is actuated by an actuator (7), in particular an electromagnetic actuator, controlled by a fully variable engine control unit (15). Based on the predetermined operating cycle, the valve can close off the cylinder interior space against a gas exhaust channel (13) that follows the valve seat (3) of the exhaust valve. This channel is connected to an exhaust gas system and is provided with a means for example a constriction (14) for reducing the pressure gradient during the start of the opening of the gas exhaust valve (2). A specific pressure fluctuation is used for a further reduction in the pressure gradient behind the exhaust valves during the opening through a corresponding layout of the pipe geometry and the container volumes in the exhaust gas system or corresponding installed components.

Abstract: The invention relates to a method for influencing the mixture formation and charging movement in the cylinders of a piston internal combustion engine with at least one gas inlet valve and at least one gas outlet valve per cylinder, respectively. Each of these is provided with a fully variable, preferably electromagnetic valve gear and is controllable by means of an electronic control device which is designed in such a way that within predetermined speed ranges and/or in predetermined load conditions, at least some of the gas inlet valves and/or gas outlet valves can be moved in dependence on the piston stroke, respectively, with a stroke course that is variable in relation to opening and closing times and/or opening time for opening width and/or duration of opening period and/or speed of movement.

Abstract: A method of detecting combustion misfires in an internal-combustion engine, includes the following steps: variably actuating valve drives of the engine by an electronic engine control; performing a load-dependent control with the control system by a cylinder-control program; the load-dependent control includes the step of reducing power in at least one cylinder by separately affecting ignition and fuel supply thereto; detecting, in the control system by the cylinder-control program, the cylinder of reduced power with a cylinder-identification signal; at predeterminable intervals detecting, from signals obtained in the preceding step, resulting deviations of predetermined operating data as normal operation; detecting, as combustion misfires, deviations of the predetermined operating data from the normal operation obtained in the preceding step; and generating a setting signal upon detecting deviations in the preceding step.

Abstract: A method of cold starting an internal-combustion engine includes the steps of rotating the engine crankshaft by a starter motor to initiate cold starting; and during initial work cycles of the cold start, controlling, by an engine control device, the cylinder valves, the fuel injection device and the ignition device belonging to at least one selected cylinder, such as to operate the selected cylinder in a delayed intake opening mode.

Abstract: A method of affecting the mixture formation and motion of a charge in an engine cylinder during a suction cycle of a gas intake valve of the cylinder. The suction cycle has a first cycle portion and a subsequent, second cycle portion. The method includes the following steps: introducing air and fuel into the cylinder during the suction cycle; maintaining, during the first cycle portion, the gas intake valve in a first open position at full valve stroke in which the gas intake valve has a fully open cross-sectional flow passage area; and maintaining, during the second cycle portion, the intake valve in a second open position at a partial stroke of the gas intake valve. The partial stroke is less than one half of the full stroke; and in the second open position the gas intake valve has a partially open cross-sectional flow passage area.

Abstract: An electromagnetic actuator includes an electromagnet; and an armature movable toward the electromagnet by an electromagnetic force generated upon energization of the electromagnet. The armature is connectable to a setting member displaced as a function of armature motions. The electromagnetic actuator further has a resetting spring which opposes the electromagnetic force and which has a first end supported in a housing and a second end; and at least one jointed connecting arrangement interposed between the resetting spring and the armature for supporting the armature on the second end of the resetting spring.