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:
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:
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:
A method of operating a user equipment for measuring non-contiguous carriers comprises: changing a position of a local oscillator to be in the middle of the non-contiguous carriers; measuring the carriers simultaneously; estimating a power level of an interferer in a gap in the non-contiguous carriers which creates image interference; and compensating the measurement dependent on the interferer power level and an image rejection factor.
Abstract:
A method for determining a length of a message block of k bits from a length candidate set, comprising steps of: —Selecting (401) a length candidate (N) among the set; —Decoding (402) a received frame to form a decoded sequence that includes a message of a length equal to the length candidate (N), by a Viterbi decoder; —Calculating (402) a Viterbi variable (S(N)) for this candidate (N), —Comparing (403) the Viterbi variable with a threshold (Δ), —Repeating the selecting (401), decoding (402) and calculating (402) steps if said Viterbi variable (S(N)) is greater than the threshold (Δ) and if there exists an unselected length candidate among the set; —If the Viterbi variable is greater than a best value (Sbest), updating this best value to the Viterbi variable and updating a best length (Nend) to this candidate; —Wherein the threshold (Δ) is initially set to a value determined according to the conditions of reception of the receiver.
Abstract:
The present invention relates to the field of battery measurement for a mobile terminal, and provides a method and a device for measuring state of charge (SoC) of a mobile terminal The method comprises: measuring, after the mobile terminal enters a sleep/idle mode, battery parameters of the mobile terminal in accordance with a predetermined measurement period; filtering, when the mobile terminal exits the sleep/idle mode, the measured battery parameters and storing the filtered battery parameters; and acquiring state of charge of the mobile terminal in accordance with the stored battery parameters. According to the technical solution of the present invention, the battery power of the mobile terminal can be measured and the process of the battery power consumption can be calculated accurately.
Abstract:
A signal filter (100) comprises a first transferred impedance filter, TIF, (TIFA) having four differential signal paths (PA,1, PA,2, PA,3, PA,4) and a second TIF (TIFB) having four differential signal paths (PB,1, PB,2, PB,3, PB,4)- A first differential signal port of the first TIF (32A) is coupled to a first differential signal port of the second TIF (32B). A first clock generator (12A) is arranged to provide first-TIF clock signals (CLKA,I+, CLKA,Q+, CLKA,I−, CLKA,Q−) having four non-overlapping phases for selecting the respective first-TIF differential signal paths (PA,1, PA,2, PA,3, PA,4), and a second clock generator (12B) is arranged to provide second-TIF clock signals (CLKB,I+, CLKB,Q+, CLKB,J−, CLKB,Q−) having four non-overlapping phases for selecting the respective second-TIF differential signal paths (PB,1, PB,2, PB,3, PB,4). The phases of the second-TIF clock signals (CLKB,I+, CLKB,Q+, CLKB,I−, CLKB,Q−) are equal to the phases of the first-TIF clock signals (CLKA,I+, CLKA,Q+, CLKA,I−, CLKA,Q−) delayed by 45 degrees. The first-TIF first, second, third and fourth clock signals (CLKA,I+, CLKA,Q+, CLKA,I−, CLKAQ−) and the second-TIF first, second, third and fourth clock signals (CLKB,I+, CLKB,Q+, CLKB,I−, CLKB,Q−) have a duty cycle in the range 16.75% to 25%.
Abstract:
A method of authenticating an agent to a secure environment of a device, in a challenge-response authentication sys tem comprising the device, a remote authentication server and a connection path between the device and the remote authentication server, the method comprising: while the connection path is not established:—obtaining a predictable challenge based on at least a current value of a counter;—obtaining a response for the challenge; and,—authenticating the agent to the secure environment based on at least the response; and, wherein, upon successful authentication, the value of the counter is incremented. A challenge-response authentication system and an apparatus are also claimed.
Abstract:
A voltage regulator includes a current bridge and first and second current paths coupling a current mirror to respective first and second voltage-to-current converters. The current mirror controls a second current dependent on a first current. The first voltage-to-current converter controls the first current dependent on either a reference voltage or a feedback voltage derived from the regulator's output voltage, and the second voltage-to-current converter controls the second current dependent on the other of the feedback and reference voltages. Voltage-to-current conversion by the first converter is independent of voltage-to-current conversion by the second converter. An output transistor stage coupled to the second current path controls the output voltage dependent on the voltage in the second current path indicative of a deviation of the second current from a target current value dependent on the reference voltage.
Abstract:
It is proposed a method for receiving and demodulating an orthogonal frequency division multiplexing signal received through a transmission channel (TC) by a receiver (RCV), comprising demultiplexing said signal to generate time symbols (yl(n)) and performing a time-to-frequency conversion of these time symbols to generate frequency bins (Yl(k)) corresponding to received symbols, the received symbols comprising preamble symbols. The method comprises: Determining an estimated carrier frequency offset on the basis of frequency bins corresponding to used subcarriers of the preamble symbols; Applying said estimated carrier frequency offset to the time symbols so as to correct the carrier frequency of these received symbols.