Abstract: A method for testing a band allocated to a non serving cell for a wireless OFDM communication systems, involving the step of:—configuring the RF front end circuit to receive a wide band signal covering multiple candidates of bandwidths (BW1) which are likely to be allocated to said non serving cell;—computing the received OFDM symbols;—entering into a first loop for successively testing two consecutive bandwidth candidates (BWj), said testing comprising the steps of:—computing a first non coherent power estimation (RSRP_Excessi) of the received signal on the basis of the reference signals (RS) existing in the non overlapping range of said two consecutive bandwidth (BWi);—computing a second coherent power estimation (RSRP_ExcesSj_coh)of the received signal on the basis of the reference signals (RS) existing in the non overlapping range of said two consecutive bandwidth (BWi);—comparing said first and said second estimation and determining and determining whether the tested bandwidth (BWi) is allocated to said

Abstract: Cell detection process for a communication network, such as a Long Term Evolution (LTE) system; comprising the steps of: receiving signal samples (i.e. OFDM samples in the case of LTE) transmitted by at least one Base Station (BS); performing a first Primary Synchronization Signal (PSS) correlation measurement with a predetermined PSS sequence in order to generate a first PSS correlation measurement sequence; performing a second Primary Synchronization Signal (PSS) correlation measurement in order to generate a second PSS correlation measurement sequence; comparing said first and second correlation measurement sequences with a predetermined threshold in order to determine peak values, determining common peak values substantially corresponding to similar locations within the half radio frame, and identifying the PSS corresponding to said common peak positions.

Abstract: A method of processing a paging message, the method being suitable for a User Equipment (UE) for a wireless telecommunication system, and comprising the steps of:—monitoring a Paging Indicator (PI) included in a Paging Indicator Channel (PICH) message;—upon reception (210) of a Paging Indicator (PI) relevant to said User Equipment, detecting and decoding a paging (PCH) channel in order to decode a corresponding paging message (220);—computing and checking the CRC (230) of said paging message and, in case of failure of the CRC check, performing the following steps:—performing (240, 250) a partial checking of said paging message, said partial checking being limited to a number of fields of said paging message;—determining whether said paging message is relevant to one single UE (260);—if said paging message is relevant to one single UE, replacing (261) the bits not relevant to said single UE by default bits and computing and checking (262) a new CRC—if the new CRC check succeeds, forwarding the processed paging

Abstract: A Process for achieving slot synchronization of the P-SCH sequence in a UMTS communication system, involving the step of receiving (41) said signal including a synchronization sequence (P-SCH); performing a correlation (42) of each received sample with a known synchronization sequence (P-SCH) in order to generate a correlation profile; determining (43) the level of noise and computing a first threshold; suppressing (44) any peaks within said correlation profile having a magnitude inferior to said first threshold; detecting (45) the persistent local maximum peaks over a period of N slots; applying a predetermined mask positioned with respect to said persistent peaks and associated to at least one second threshold value distinctive from said first threshold.

Abstract: The SINR (signal-to-interference+noise ratio) estimator comprises a low-pass filter (66) to filter a variance ?? computed from the received pilot symbol amplitude to obtain an estimated variance ?? with a reduced bias, wherein the low-pass filter has an adjustable coefficient and the estimator comprises an electronic controller able to adjust the value of the adjustable coefficient according to the number of pilot symbols received during a timeslot.

Abstract: MIMO receiver for processing N data streams received by N antennas for a direct-sequence (DS) spread-spectrum wireless communication system comprising: a first linear equalizer operating at the chip level for performing linear chip level Inter-Chip Interference (ICI) and all Inter-Stream Interference (ISI) cancellation (Channel Shortening) of said N data streams, and generating N output chip level data streams; de-spreading blocks for separately de-spreading the N outputs of said first linear equalizer; and a second non linear detector for performing spatial equalization and multi-stream detection. The invention also provides a process for processing the mimo data streams based on the separate performing, on one side, of a linear chip level Inter-Chip Interference (ICI) an and all Inter-Stream Interference (ISI) cancellation and, on the other side, spatial multi-stream detection.

Abstract: 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.

Abstract: A process for cancelling inter-cell interference between neighboring cells in a synchronized OFDM communication system allowing communication between one User Equipment (UE) fitted with at least two antennas and one serving base station is provided. The process allows multi-antenna mobile receiver in a UE to receive downlink information from a base station that includes both information relating to proper communication with the base station and additional information that was received by the base station from a neighboring base station that provides interference data about another UE. The multi-antenna UE is adapted to use the downlink information in its receiver circuitry to cancel the interference from the other UE.

Abstract: The present invention relates to a method and a device for detecting active spreading codes for a signal in a communication system and estimating power of the active spreading codes. Further, the present invention ensures efficient interference cancellation. Multiple correlations are performed at a single level of a spreading code tree, the produced output samples are then observed at this level during a defined period, and a decision for the activity and power is met for all existing codes via extracting and processing information from these samples. At the correlation step, unitary fast Walsh Hadamard transformation is performed at practically the highest spreading factor in the system.

Abstract: In a receiver of a UMTS telecommunication system a process for performing the Outer Loop power control in a User Equipment is provided. The receiver includes an improved outer loop power control mechanism that estimates a Signal to Interference target (SIRtarg) based on a Block Error Rate target (BLERtarg) received from a base station. The outer loop control mechanism estimates a BLER value (BLERest) based on a number of received blocks and then adjusts a SIR target value (SIRtarg) based on the relationship between BLERtarg and BLERest. Meanwhile, simultaneously in parallel, the outer loop power control mechanism monitors for a potential convergence of a first SIR value with the SIRtarg and upon detection of such potential convergence applying a correction to SIRtarg.

Abstract: A process and receiver for canceling interference generated by a set interference base stations in a synchronized OFDM communication system and receiver in a User Equipment comprising a set of Nrx antennas. The process and receiver that cancels interference generated by a set of base stations performs OFDM demodulation on a receiver signal for each antenna of a user equipment (UE). The process and receiver also monitors each UE antenna for pilot signals generated by nearby base stations. Then the process or receiver extracts the pilot signals and establishes a list of existing base station antennas. The channel power of any interfering antennas is measured and then the Nrx-N most powerful antenna is selected. The process or receiver then performs a joint detection of the N useful Data Symbols (UDS), together with the (Nrx-N) Interfering Data Symbols (IDS) that are demodulated by demodulation blocks.

Abstract: Process of a finger assignment in a rake receiver for a wireless communication device comprising the following steps:—detection (21) of a pilot (CPICH) and the comparison of its energy according to a first threshold value;—detection (22), on the basis of said first threshold value, of a first significant path;—assignment (23) of said first significant path to a first finger of the rake receiver;—determination (24) of an observation window;—application (25) of a second threshold value, distinct and lower than said first value, for the detection of secondary paths;—rake fingers assignment to secondary paths detected.

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: An iterative decoding device for a communication receiver includes a decoder for decoding received encoded data blocks by a next iteration initialization, a controller to choose one of the first and second hard decision bits in order for the validity of a CRC field, associated to this received data block, to be checked, and a first memory. The controller, when the CRC field of a block is invalid, orders the decoder to store the final stakes associated to the block in the first memory to require the transmission of a redundant version of the block, and when the redundant version is received, to initialize the decoder with the stored final stakes before it applies the next iteration initialization mechanism to the received redundant version.

Abstract: A diversity receiver and a method of recovering symbols in a diversity receiver system comprises receiving first and second signals at first and second antenna elements. The first signal comprises first and second consecutive symbols modified by a first channel coefficient and the second signal comprises the first and second symbols modified by a second channel coefficient. The first and second signals are delayed and the first and second channel coefficients are estimated by applying the delayed first and second signals to a master Rake finger having first and second outputs for the estimated the first and second channel coefficients. A complex conjugate of the estimated second channel coefficient is produced.

Abstract: An iterative decoding device (ITD) for a communication receiver comprises: i) a means (SISO1, SISO2, DI1, DI2, I1, I2) for decoding received encoded data blocks by means of a so-called next iteration initialization mechanism, a control means (CM) arranged to choose one of the first and second hard decision bits in order for the validity of a CRC field, associated to this received data block, to be checked, and Ëi) a first memory means (M1). The control means (CM) is also arranged, when the CRC field of a block is invalid, —to order the decoding means to store the final stakes associated to the block in the first memory means (M1), —to require the transmission of a redundant version of the block, and —when the redundant version is received, to initialize the decoding means (SISO1) with the stored final stakes before it applies the next iteration initialization mechanism to the received redundant version.

Abstract: A method and associated module for selection of a maximum peak in a correlation signal corresponding to the correlation between a code periodically transmitted by a transmitter, and an input signal received by a receiver on a radio channel, includes a selection criteria which is the time recurrence of the same position of peaks of correlation, taking into account a margin around the peak position compensating for a drift due to a frequency offset between the receiver and the transmitter.

Abstract: 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.

Abstract: 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.

Abstract: The present invention relates to a method and a device for detecting active spreading codes for a signal in a communication system and estimating power of the active spreading codes. Further, the present invention ensures efficient interference cancellation. Multiple correlations are performed at a single level of a spreading code tree, the produced output samples are then observed at this level during a defined period, and a decision for the activity and power is met for all existing codes via extracting and processing information from these samples. At the correlation step, unitary fast Walsh Hadamard transformation is performed at practically the highest spreading factor in the system.