Abstract: An exemplary method of maintaining secure time in a computing device is disclosed in which one or more processors implements a Rich Execution Environment (REE), and a separate Trusted Execution Environment (TEE). The TEE maintains a real-time clock (RTC) that provides a RTC time to the REE. A RTC offset is stored in non-volatile memory, with the RTC offset indicating a difference between the RTC time and a protected reference (PR) time. Responsive to a request from the REE to read the RTC time, a current RTC time is returned to the REE. Responsive to a request from the REE to adjust the RTC time, the RTC time and the corresponding RTC offset are adjusted by a same amount, such that the PR time is not altered by the RTC adjustment. An exemplary computing device operable to implement the method is also disclosed.

Abstract: A voltage level shifting device for driving a capacitive load has an input terminal for receiving a first input signal switchable between a first logic state corresponding to a first reference voltage and a second logic state corresponding to a second reference voltage, and an output terminal for supplying an output signal switchable between a first logic state corresponding to a third reference voltage and a second logic state corresponding to a fourth reference voltage. The device also has a first electronic circuit that is activated following a commutation of the first input signal from the first reference voltage to the second reference voltage for fixing the output terminal to the fourth reference voltage. The device further has a second electronic circuit that is activated following a commutation of the first input signal from the second reference voltage to the first reference voltage.

Abstract: The invention relates to a circuit (100) for use with a loudspeaker (104) having a first differential input terminal (t1) and a second differential input terminal (t2), the circuit (100) comprising: a differential power amplifier (103) having a first differential output terminal (t3) operatively connected to the first differential input terminal (t1) of the loudspeaker (104) and a second differential output terminal (t4) operatively connected to the second differential input terminal (t2) of the loudspeaker (104);—a first resistor (RS1) disposed between the first differential output terminal (t3) of the differential power amplifier (103) and the first differential input terminal (t1) of the loudspeaker (104); a second resistor (RS2) disposed between the second differential output terminal (t4) of the differential power amplifier (103) and the second differential input terminal (t2) of the loudspeaker (104).

Abstract: An interface circuit is provided that is adapted to connect a microphone circuit to a preamplifier. The microphone circuit has a microphone and at least an output node and the preamplifier has at least an input node connected to the output node by the interface circuit. The interface circuit has at least a decoupling capacitor for DC decoupling the input node from the output node. The decoupling is connected between the input node and the output node. The interface circuit has at least one active circuit, comprising a resistor connected the decoupling capacitor. The resistor acts as part of a resistance multiplier and has an equivalent resistance that together with the decoupling capacitor defines a high-pass filter connected between the microphone and the preamplifier. The interface circuit may also have a biasing circuit connected to the resistor.

Abstract: The invention relates to a method for estimating a blurriness value based on a series of at least two frames acquired within a period of time greater than or equal to a given exposure time, the frames being grouped in at least one couple of frames, characterized in that it comprises determining, for each couple of frames of the series, first and second values corresponding to a displacement according to a first direction and a second direction, between the first frame and the second frame of a couple of frames, determining a first blur measure for one direction among the first and second directions by calculating a metric based on the displacement values for each couple of frames of at least a subset of the series, determining a second blur measure for the other direction among the first and second directions by calculating a metric applied to the displacement values for each couple of frames of the series of frames and determining a blurriness value based on the first and second blur measures.

Abstract: A method, apparatus, receiver, computer program and storage medium for joint detection are disclosed. The joint detection method includes categorizing interference signals based on level of interference so as to obtain a strong interference signal, cancelling the strong interference signal from a received signal, and performing a joint detection by utilizing a matched filtering result of a remaining signal.

Abstract: A downlink signaling counter management method for a communication device is adapted to be simultaneously associated with at least two subscriber identities and to simultaneously provide radio receiving capabilities to less than all of the subscriber identities. For each decoding of a paging block for a subscriber identity, it is determined whether the paging block decoding was correct and whether a previous paging block decoding condition is fulfilled. The downlink signaling counter is updated with different values depending on this determination results, and on whether the paging block decoding was based on a maximum number of paging bursts.

Abstract: A method of calibrating coexistence of several wirelessly communicating sub-systems within a wireless device wherein the wirelessly communicating sub-systems comprise several transmitters and several receivers which are interconnected through one or more interfaces, the method comprising:—activating one of the transmitters while maintaining the other transmitters off by causing said transmitter to transmit a first signal with a known set of characteristics;—measuring unwanted signal received at each receiver and originating from a coupling of said receivers with the activated transmitter;—storing coupling data derived from each of the measured unwanted signals in relation with the set of signal characteristics of the first signal and/or a set of unwanted signal characteristics, whereby forming a calibration database for adjusting operation of one or more transmitters and/or receivers to manage the coexistence of the plurality of wirelessly communicating sub-systems during normal operation of the wireless devi

Abstract: A two-stage, passive, RC polyphase filter for mm-wave quadrature LO generation is presented. The filter features an innovative, symmetrical layout structure, which is more robust to parasitics than the conventional layout. Layout parasitics which become important at mm-wave frequencies are identified and a compensated. Impedance variations and transfer functions are evaluated considering these dominant parasitics. More than 15 dB improvement in image rejection ratio is achieved in comparison with conventional layouts. Using the inventive techniques more than 35 dB of image rejection ratio over a bandwidth of 6 GHz is demonstrated in an outphasing transmitter at 60 GHz in 40 nm CMOS.

Abstract: The invention deals with a method of communication in cellular networks comprising mobile user equipments (1, 2, 3, 4), base stations (5, 6, 7, 8) and core networks (9, 10), backhauls (1, 12, 13, 14, 15) between base stations (5, 6, 7, 8) and core networks (9, 10), including, if a request from or to a mobile user equipment (4) cannot be satisfied by a base station (6) of a first network through own backhaul according to traffic load thereon, the step of trying to satisfy said request through backhaul of another neighbor base station (8) of a second network different from first network, said another neighbor base station (8) being selected according at least to availability and to offered quality of service thereof.

Abstract: Embodiments of the invention concern a method for mitigating interference between near field communication and an audio stream in a mobile user equipment (1), wherein the method includes a step (S5) of replacing at least part of the interfered audio stream by a sound representative of an interfering near field communication transaction.

Abstract: Systems and methods for suppressing pop-up noise in an audio signal are disclosed. The system includes a driver circuit shared by a pin interface and a complementary pin interface. A control unit is coupled to the pin interface and the complementary pin interface. To activate the pin interface, the control unit is configured to first activate the driver output at the complementary pin interface. Once the complementary pin interface achieves a preset voltage, the driver output is switched to the pin interface by the control unit. In addition, the driver circuit can be calibrated for a DC offset on the complementary pin interface by re-using calibration data calculated at the pin interface. Further, DC correction signals can be provided from a pre-biasing circuit based on the calibration data of the driver circuit.

Abstract: A DC-DC converter controls a supply current (IIN) provided to a rechargeable battery. The converter comprises an electrical input terminal that receives supply current (IIN). An electrical output terminal is connected to the battery through a coil with a resistor in series therebetween. A controllable selector connects the input terminal to the output terminal during a first time interval in order to supply the battery and to connect the input terminal to a ground potential during a successive second time interval. Also, a feedback module generates a control signal for the selector from a resistor feedback signal, indicative of a variation of a battery charge current (IOUT). The feedback module has an electronic block that receives the feedback signal. The electronic block processes the feedback signal to measure a variation of the supply current (IIN) and provide the control signal to adjust the duration of the first time interval.

Abstract: A UE communication device is provided having a transmitter architecture that transmits SRS transmissions and PUSCH transmissions. A reference mode chosen from a LPM, an MPM and an HPM is selected based on a present power mode of the SRS transmission or based on a predicted power mode that the PUSCH transmission following the present SRS transmission will likely operate in. The transmitter architecture has an exemplary extended switching point structure allowing the RPD between the SRS transmission used for pre-quarter selection and the subsequent PUSCH transmission applying the pre-quarter to be minimized.

Abstract: There is provided a source device, which is adapted to communicate with a sink device through an HDMI cable. The sink device comprises an internal circuit, handshaking circuitry adapted to verify if the sink device is able to supply a current on a line of the HDMI cable, an internal power supply intended for powering the line and a switching circuit able to uncouple the internal power supply from the line and able to couple the internal circuit to the line. There is also provided a sink device, which is adapted to communicate with a source device through an HDMI cable. The sink device comprises a power supply, hand-shaking circuitry able to indicate that the sink device is able to supply a current on a line of said HDMI cable, and a circuit able to couple the power supply to the line.

Abstract: The invention concerns a security chip of a communication device, comprising: a near field communication interface (37), a first processing unit (42), a first non volatile storage capability (45), adapted to store first information related to near field communication, and connected to be accessed, from outside the security chip, through said near field communication interface (37), under the control of said first processing unit (42), wherein it also comprises a second non volatile storage capability (48), adapted to store second information related to near field communication different from said first information, and connected to be accessed, from outside the security chip, independently from said first processing unit (42).

Abstract: The electronic device and a corresponding signal processing method disclosed herein reduces electromagnetic noise. To that end, the electronic device includes a delay line, an oscillator, and a modulator. The delay line generates a spread spectrum clock signal from an input clock signal, where a timing jitter and a period of jitter of the spread spectrum clock signal are controlled at each period of the spread spectrum clock signal based on a digital code. The oscillator uses the spread spectrum clock signal to generate a processing signal. The modulator modulates the processing signal as a function of an audio signal.

Abstract: A system and method for vector memory array transposition. The system includes a vector memory, a block transposition accelerator, and an address controller. The vector memory stores a vector memory array. The block transposition accelerator reads a vector of a block of data within the vector memory array. The block transposition accelerator also writes a transposition of the vector of the block of data to the vector memory. The address controller determines a vector access order, and the block transposition accelerator accesses the vector of the block of data within the vector memory array according to the vector access order.

Abstract: Process of assignment and deallocation of a correlation unit or finger of a rake receiver intended to treat a received signal of a wireless communication system characterized in that the assignment of a finger is ordered by a CPICH detector operating on the level of the frame of said signal and in that the deallocation of the same finger is controlled by the analysis of a criterion derived from the RSCP indicator calculated on the level of a slot of said signal. The invention also achieves a rake receiver for the implementation of the process.

Abstract: The present subject matter discloses a method for antenna activity detection in multi-antenna communication devices. In one embodiment, the method comprises computing a received signal strength indicator (RSSI) value for each of a plurality of antennas based on a sampled data associated with each of the antennas. The RSSI values may then be analyzed to identify an antenna having a highest RSSI value as a primary antenna and one or more antennas having the RSSI value less than the highest RSSI value as auxiliary antennas. Further, an RSSI difference for each of the auxiliary antennas is calculated and compared with a first threshold value to ascertain one or more potentially inactive antennas from among the auxiliary antennas. The potentially inactive antennas may then be further analyzed to identify one or more inactive antennas based at least in part on the RSSI value.