Abstract: The present invention relates to a memory circuit and a method of controlling data retention in the memory circuit, wherein a supply signal is selectively switched to a respective one of at least two virtual supply lines (24) each shared by a respective one of a plurality of groups (30-1 to 30-n) of memory cells (C0,0 to Cy,z). The selective switching is controlled based on a global activity control signal (A), used for setting the memory circuit either into a standby state or into an active state, and a local data retention indication signal (DR1 to DRn) allocated to a dedicated group of memory cells. Thereby, the data retention part of the memory circuit can be adapted to the application and its state, and standby mode leakaged power is only dissipated in those memory cells for which data retentions actually required.

Abstract: The invention may provide a method and filter block for compensating droop in a frequency response of a signal. The filter block may include a decimator, which decimates a high frequency input signal to a set frequency output signal. The set frequency can be, for example, the Nyquist frequency for the input signal. Further, the filter block may include a droop compensator that compensates the droop in the frequency response of the output signal from the decimator. The droop compensator may be made using recursive filters, as opposed to large tap FIR filters, which may result in less memory consumption and decreased power consumption.

Abstract: A receiver estimates I/Q imbalance in I and Q input signals using circuitry to separate different frequency components of the I and Q input signals, and estimation circuitry arranged to estimate I/Q imbalance at the different frequency bands. The separating of the bands may be carried out in the frequency domain, and may involve combining corresponding values representing corresponding negative and positive frequency bands, and converting the separated frequency domain representations to a time domain representation before the estimation. The estimated imbalance may be used to correct the I and Q signals at the different frequency bands.

Abstract: A circuit and method for bridging multiple source Advanced High-performance Bus (AHB) slaves to a target AHB slave are provided. The circuit uses multiple slave controllers and a multiplexing device to handle signals between the multiple source AHB slaves and the target AHB slave to avoid conflicts between the multiple source AHB slaves to access the target AHB slave.

Abstract: Apparatus (40) comprising a voltage input (49) for applying an unfiltered voltage (V_unfil) and a current input (48) for receiving a bias current (Ib) from a current source. The apparatus (40) further comprises a differential filtering resistive circuit with a first current mirror (44) and a second current mirror (43), being situated between a common output node (50) and said voltage input (49). A first mirror circuit (42) for mirroring the bias current (Ib) to said first current mirror (44), and a second mirror circuit (41) for mirroring a current (Ix) to said second current mirror (43) are employed. A filter capacitor (51) situated at the output side of the apparatus (40), said filter capacitor (51) being connected on one side to said common output node (50) and on the other side to ground. The apparatus (40) provides a filtered output voltage (V_fil) at said common output node (50).

Abstract: A method of managing fingers for multipath signals in a wireless communication device. In one embodiment, the present invention recites receiving multipath signals at a wireless communication device. The present embodiment then acquires one of the multipath signals in a searcher portion of the wireless communication device and determines a signal-to-noise ratio (SNR) level of the one multipath signal. Next, the present embodiment evaluates the multipath signal for categorization into one of a plurality of states and then generates a finger assignment by selectively providing the multipath signal for a demodulation operation based upon its state. The present embodiment then receives the finger assignment from the searcher portion of the communication device and determines a signal-strength for the finger assignment. The present embodiment then enables the finger assignment for a combine operation if the signal-strength for the finger assignment satiates a first signal-strength threshold.

Abstract: This disclosure relates to a method and system for impact mitigation of sudden carrier frequency shifts in OFDM receivers that transforming a received complex digital baseband signal and decoding data from the transformed signal.

Abstract: A method and circuit for signal processing in a receiver that can be tuned to different carriers, the method determining the energy of the adjacent carriers N+1 and N?1, wherein a carrier N contains a signal of interest and the receiver is tuned to it, from the digital signal, in that the energy value of the carriers N+1 and N?1 determined are compared with a threshold value, and in the case where the threshold value is exceeded, a frequency shift of the signal by +?f or ??f is effected in the second method step prior to the filtering, and the frequency shift thus produced is reversed by a frequency shift by ??f or +?f prior to the filtering, and the signal is decoded.

Abstract: This device utilizes frames transported on carriers of different frequencies (BCCH ext CBCH(SD/8)). For processing the information coming from these frames, the device comprises a transceiver circuit (10) including a phase-locked loop for a local oscillator (12). The information is distributed over these frames in locations so that the loop has time to phase lock the local oscillator (12) for receiving information contained in another frame of a different carrier.

Abstract: A device comprising: an input for an electric signal; an integrator stage connected to said input to provide an integrated signal; an amplifier stage electrically coupled to the integrator stage to receive said integrated signal and to provide an output signal. The device being characterized in that the integrator stage is such that the integrated signal is obtained by an individual signal integration operation.

Abstract: A constant voltage generator device provides a first and a second transistor having their main current path coupled serially via a common terminal for providing a constant output voltage at the common terminal of said transistors. The device provides one or more potential dividers having a plurality of serially connected resistive elements. A first voltage is obtained from a first combination of resistive elements of the potential divider and a second voltage obtained from a second combination of resistive elements of the potential divider. The first and the second voltages are supplied to the first and the second voltage at the control terminals of the first and the second transistors, respectively.

Abstract: A method for controlling a modulation signal for modulating a phase locked loop. A scaling control signal for scaling the modulation signal is generated using the error signal of the phase locked loop. The scaling control signal is adjusted when the modulation signal and the phase of the modulation signal have the same sign.

Abstract: A receiving apparatus for a digital mobile communication system comprises an adaptive filter for filtering an input signal. A step-size parameter chosen for the adaption of filter coefficients of the adaptive filter is computed from a variation of the filter coefficients used by the adaptive filter. This facilitates an indirect measure for the channel variation so that a good reception quality over a wide range of user velocities may be enabled in contrast to a system design based on a compromise step-size parameter being optimum for one velocity only.

Abstract: A scheme determines the first significant path (FSP) of a received multipath signal, from data defining the relative delay and the amplitude of the individual signal paths occurring in a series of time frames. The scheme includes filtering the data to spread the signal paths, performing a persistence test between frames to reject spurious signal paths, combining the energy of the signal paths in a frame, applying a test to determine the time at which the combined energy satisfies a criterion, and selecting the FSP dependent on that time. The combined energy may be evaluated within a sliding window, and the position of the window within the frame determined that maximizes the combined energy. Alternatively, the combined energy may be evaluated as the cumulative energy through the frame, and the position determined at which the cumulative energy reaches a threshold.

Abstract: A phase-switching dual modulus prescaler having a dual modulus divider is provided. Said divider comprises a first and second divide-by-2 circuit (A;B), wherein said second divide-by-2 circuit (B) is coupled to the output of said first divide-by-2 circuit (A) and at least said second divide-by-two circuit (B) comprises a four phase output each separated by 90°. A phase selection unit (PSU) is provided for selecting one of the four phase outputs (Ip, In, Qp, Qn; INi, INni, INq, Innq) of the second divide-by-2 circuit (B). Moreover, a phase control unit is provided for providing control signal (C1, NC0; C2, NC2; C3, NC3) to the phase selection unit, wherein the phase selection unit (PSU) performs the selection of the four phase outputs (Ip, In, Qp, Qn; INi, INni, INq, Innq) according to the control signals (C0, NC0; C1, NC1; C2, NC2). Said phase selection unit (PSU) is implemented based on direct logic.

Abstract: This invention relates to a device, a method, a computer program and a computer program product for a device capable of communicating in a first mode of wireless communication and a second mode of wireless communication simultaneously, wherein it is determined for each of at least one channel of a plurality of channels whether interference occurs between the first mode and the second mode; and wherein the channels which have been determined not to cause interference are stored in a list of preferable channels. For instance, in the case where the first mode represents a cellular communications mode, during a cell selection/reselection procedure of the first mode, instead of searching in the cell information stored for the PLMN, it will first search in the list of preferable channels when the second mode is active.

Abstract: A system and method having a multimode wireless communication terminal with at least two SIM card slots for use with at least two phone numbers simultaneously online (dual standby). The system includes a main controller, a primary mode module, a secondary mode module, and an inter-system measurement module. The main controller operates the multimode wireless communication terminal in single standby or dual standby state. The primary mode module enables the primary mode of operation for the multimode wireless communication terminal. The primary mode of operation is a default mode of operation. The secondary mode module enables the secondary mode of operation for the multimode wireless communication terminal. Paging information for the primary mode of operation and the secondary mode of operation are monitored at their respective monitoring rates using a TDM method. Switching between the primary and secondary modes of operation is executed by an inter-system handover module.

Abstract: In one embodiment, the present invention includes a method for determining a level of a buffer that stores data samples. The level may be determined at a predetermined position of a data frame sequence. Based on the level of the buffer at this position, a vocoder and modem of a mobile station may be synchronized. One or both of the vocoder and modem may be adjusted to attain the synchronization. Thus a rate mismatch between the vocoder and modem may be resolved.

Abstract: A mobile terminal in CDMA-TDD system and a method thereof, wherein the terminal comprises a receiving means, receiving and processing wireless signals from a downlink; a transmitting means, transmitting wireless signals via a uplink; and a transmit power control means, receiving a power control message transmitted via the downlink, after acquiring a channel gain value between said mobile terminal and a base-station, calculating a value of the transmit power of said mobile terminal according to said power control message, said channel gain value and a set processing gain value, and adjusting the transmit power of said mobile terminal according to said value of the transmit power, wherein said adjusting the transmit power of said mobile terminal is synchronized with those of other terminals assigned within a same time slot.

Abstract: The invention relates to the domain of turbo decoders. Such a decoder comprises a first decoder (14) and a second decoder (16), each decoder being able to calculate extrinsic output data from extrinsic input data coming from the other decoder. The decoding circuit according to the invention comprises a single memory (31) for storing the extrinsic data. When a decoder calculates an extrinsic output data from an extrinsic input data coming from the other decoder and stored in the single memory at a certain address, this extrinsic output data is then written at this same address.