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Pierre Demaj

Pierre Demaj, Surrey FR

Patent application numberDescriptionPublished
20100135361 CDMA RECEIVERS AND CDMA COMMUNICATIONS SYSTEMS - A CDMA communications system includes a primary station and at least one secondary station. The secondary station includes a receiver for receiving CDMA signals transmitted on the downlink. The receiver includes a plurality of Rake finger receivers having inputs for receiving signals and outputs coupled to a combining stage for combining their output signals constructively, a finger assignment stage for assigning the finger receivers to respective received signals, a processing stage for estimating the speed of the CDMA receiver from the signals received and for varying the time required to make a finger replacement decision in response to the estimated speed so that the time required decreases as the speed of the receiver increases and vice versa.06-03-2010

Pierre Demaj, Nice FR

Patent application numberDescriptionPublished
20080247329Signal-to-Interference + Noise Ratio Estimator and Method, Mobile Terminal Having this Estimator - The SINR (signal-to-interference+noise ratio) estimator comprises a low-pass filter (10-09-2008
20080252512Method, a Program and a Module to Estimate a Doppler Maximum Frequency and an Oscillator Frequency Offset, Receiver Including the Module - Abstract: A method of estimating a Doppler maximum frequency f10-16-2008
20090028124Symbol-Level Adaptation Method for Equalizer Coefficients, Memory, Equalizer and Receiver for Implementing the Method - A symbol-level adaptation method to adapt at least one coefficient of an equalizer, wherein the method comprises the steps of: 01-29-2009
20090119570LOW COMPLEXITY BLIND TRANSPORT FORMAT DETECTION - The present invention relates to a method, apparatus and computer program product for detecting a transport format of a multiplexed transport channel used for transferring binary data, wherein a path metric value which estimates likelihood for a hypothetical trellis path to end at a predetermined state is determined for every state of a trellis stage of a possible end bit position of a data block of the transport channel. Then, for each possible end bit position a number of path metric values which indicate higher likelihood for the hypothetical trellis path to end at said predetermined state than an initial state is calculated, and the best end bit positions which lead to highest values of the calculated number are selected and error checking is performed for the selected best end bit positions to detect the transport format. The proposed selection of best end bit positions leads to a reduced number of decoding operations and thus to a reduced processing complexity.05-07-2009
20090180522FIRST 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
20100105407WIRELESS TRANSMISSION POWER CONTROL METHOD AND SYSTEM - A wireless communication system includes a primary station which has a transmitter for transmitting wireless signals on a downlink, and a plurality of secondary stations each having a receiver for receiving signals on the downlink and a transmitter for transmitting on an uplink. In a normal, loaded condition a synchronization channel and a data channel are present on the downlink and closed power control is achieved by measuring the signal to interference ratio (SIR) in a received downlink transmission, comparing the measured SIR with a target SIR and sending a power adjust indication on the uplink to cause the primary station to adjust its transmitted power on the downlink. The secondary station monitors the downlink and, in response to detecting an unloaded cell condition, determines a target SIR offset which it applies to the target SIR to overcome interference from the presence of the synchronization channel on the downlink.04-29-2010

Patent applications by Pierre Demaj, Nice FR

Pierre Demaj, Geneva CH

Patent application numberDescriptionPublished
20090296679SYMBOL-LEVEL ADAPTATION METHOD, MEMORY, EQUALIZER AND RECEIVER FOR IMPLEMENTING THIS METHOD - A symbol-level adaptation method to adapt at least one coefficient of an equalizer, wherein the method includes a) determining if there exists a shortened pilot channelization code which has a spreading factor shorter than the spreading factor of a full pilot channelization code and which is, at the same time, still orthogonal to any other simultaneously active channelization codes, and, b) if there exists a shortened pilot channelization code, despreading the pilot channel using the shortened pilot channelization code to obtain a pilot symbol estimation, and c) adapting the value of the equalizer coefficient according to the error between the pilot symbol estimation obtained from step b) and a corresponding expected pilot symbol.12-03-2009