ST Wireless SA Patent applications |
Patent application number | Title | Published |
20100121897 | Filter Block for Compensating Droop in a Frequency Response of a Signal - 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. | 05-13-2010 |
20100008449 | FREQUENCY DEPENDENT I/Q IMBALANCE ESTIMATION - 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. | 01-14-2010 |
20090307401 | CIRCUIT AND METHOD FOR BRIDGING MULTIPLE SOURCE AHB SLAVES TO A TARGET AHB SLAVE - 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. | 12-10-2009 |
20090305747 | APPARATUS FOR FILTERING A REFERENCE VOLTAGE AND MOBILE PHONES COMPRISING SUCH APPARATUS - Apparatus ( | 12-10-2009 |
20090232257 | METHOD AND SYSTEM FOR IMPACT MITIGATION OF SUDDEN CARRIER FREQUENCY SHIFTS IN OFDM RECEIVERS - 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. | 09-17-2009 |
20090221249 | METHOD AND ARRANGEMENT FOR SIGNAL PROCESSING IN A RECEIVER THAT CAN BE TUNED TO DIFFERENT CARRIERS - 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 +Δf or −Δf is effected in the second method step prior to the filtering, and the frequency shift thus produced is reversed by a frequency shift by −Δf or +Δf prior to the filtering, and the signal is decoded. | 09-03-2009 |
20090219085 | DIFFERENTIAL TO SINGLE-ENDED CONVERSION CIRCUIT AND COMPARATOR USING THE CIRCUIT - An electrical circuit for conversion from differential to single-ended includes a differential amplifier stage and first and second buffer circuits. The differential amplifier stage includes a first and a second input; and a first and a different second charging circuit that can be operatively coupled, respectively, with an output of the conversion circuit and with an auxiliary output. Each of the first and second buffer circuits is functionally arranged between one of said outputs and between one of said charging circuits. The buffer circuits being configured so as to substantially equalize relative impedances seen towards said outputs. | 09-03-2009 |
20090201083 | AMPLIFIER DEVICE AND SYSTEM USING THE DEVICE - 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. | 08-13-2009 |
20090190709 | PHASE LOCKED LOOP CALIBRATION - 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. | 07-30-2009 |
20090189643 | CONSTANT VOLTAGE GENERATING DEVICE - 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. | 07-30-2009 |
20090180522 | FIRST SIGNIFICANT PATH DETECTION - 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. | 07-16-2009 |
20090143095 | INTER-MODE INTERFERENCE PREVENTION IN A MULTIMODE WIRELESS DEVICE - 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. | 06-04-2009 |
20090131054 | METHOD AND SYSTEM FOR ENABLING DUAL STANDBY STATE IN A WIRELESS COMMUNICATIONS SYSTEM - 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. During the dual standby state, both the inter-system measurement and handover are initiated by the terminal itself. The multimode wireless communication terminal is used in a multimode wireless communication system. | 05-21-2009 |