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: Process for canceling Intercarrier Interference in a OFDM receiver receiving OFDM blocks in presence of Doppler, comprising the steps of: receiving a OFDM block comprising N samples; applying a FFT for the purpose of generating N frequency domain representations composing the received signal (R); multiplying said received signal (R) by the hermitian value of the channel (HH), with H being the channel estimate; applying on said received signal a preconditioned conjugate gradient algorithm based on a N×N P preconditioner matrix; Characterized in that said preconditioner matrix is computed at follows: Formula (19) and formula (20), where formula (I) is a LFIR×PN selection matrix obtained by extracting a predetermined number (LFIR) of rows from the identity matrix IPN, LFIR being a predetermined integer inferior to PN, with p corresponding to the basis expansion order chosen and N is the FFT size; formula (II) is equal to HFH, with H being the frequency-domain channel matrix and F being the N×N discrete-Fourier t

Abstract: Method for identifying within an incident signal at least one frequency communication channel, the incident signal being received on a wireless apparatus, comprising determining a power spectral density (PSD) of that incident signal and identifying the at least one channel from the PSD. The PSD determination comprises storing temporal samples of the incident signal received during a predetermined duration and performing a first Discrete Fourier Transform (DFT) processing on the stored samples.

Abstract: A Method for estimating the channel in a Long Term Evolution (LTE) communication system, said method involving the step of extracting a Primary Synchronization Signal (PSS) from a received signal and further involving the step of spanning said PSS based Least Square (LS) channel estimation on the 64 sub-carriers so as to facilitate the MMSE channel estimation. Preferably, the spanning is performed by means of an interpolation of the particular sub-carriers which are not allocated to said PSS (#-32, d.c.) The method involves the steps of: —Perform LS channel estimation on the 62 sub-carriers containing the PSS (40) —reconstruct the LS channel estimation on the 64 central sub-carriers by interpolating (41) on subcarriers not allocated to said PSS; —Apply (42) an Inverse DFT or Inverse Fast Fourrier Transform —Extract (43) the L first samples, with L corresponding to the length of the channel; —multiply (44) by (FLHFL+?2Ch?1)?1 —Zero-pad (45) the resulting signal to length 64; —Apply (46) a DFT or an FFT.

Abstract: To detect a cell-specific synchronization signal, a modified correlation approach is used, which removes the need for channel estimation.

Abstract: Process for canceling Intercarrier Interference in a OFDM receiver receiving OFDM blocks in presence of Doppler, comprising the steps of: receiving a OFDM block comprising N samples; applying a FFT for the purpose of generating N frequency domain representations composing the received signal (R); multiplying said received signal (R) by the hermitian value of the channel (HH), with H being the channel estimate; applying on said received signal a preconditioned conjugate gradient algorithm based on a N×N P preconditioner matrix; Characterized in that said preconditioner matrix is computed at follows: Formula (19) and formula (20), where formula (I) is a LFIR×PN selection matrix obtained by extracting a predetermined number (LFIR) of rows from the identity matrix IPN, LFIR being a predetermined integer inferior to PN, with p corresponding to the basis expansion order chosen and N is the FFT size; formula (II) is equal to HFH, with H being the frequency-domain channel matrix and F being the N×N discrete-Fourier t

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: Method for identifying within an incident signal at least one frequency communication channel, said incident signal being received on a wireless apparatus, comprising determining a power spectral density (PSD) of that incident signal and identifying said at least one channel from said PSD. The said PSD determination comprises storing temporal samples of said incident signal received during a predetermined duration and performing a first Discrete Fourier Transform (DFT) processing on said stored samples.

Abstract: Process for computing an estimation of the frequency offset in a receiver for a UMTS communication network said receiver receives the signal transmitted by two antennas and including two Common Pilot CHannels (CPICH), said process involving the steps of separating the two signals by means of computation and computing the frequency offset on the base of the two separated signals

Abstract: A Method for estimating the channel in a Long Term Evolution (LTE) communication system, said method involving the step of extracting a Primary Synchronization Signal (PSS) from a received signal and further involving the step of spanning said PSS based Least Square (LS) channel estimation on the 64 sub-carriers so as to facilitate the MMSE channel estimation. Preferably, the spanning is performed by means of an interpolation of the particular sub-carriers which are not allocated to said PSS (#-32, d.c.) The method involves the steps of: —Perform LS channel estimation on the 62 sub-carriers containing the PSS (40)—reconstruct the LS channel estimation on the 64 central sub-carriers by interpolating (41) on subcarriers not allocated to said PSS; —Apply (42) an Inverse DFT or Inverse Fast Fourrier Transform—Extract (43) the L first samples, with L corresponding to the length of the channel; —multiply (44) by (FLHFL+?2Ch?1)?1—Zero-pad (45) the resulting signal to length 64; —Apply (46) a DFT or an FFT.

Abstract: Process for computing an estimation of the frequency offset in a receiver for a UMTS communication network said receiver receives the signal transmitted by two antennas and including two Common Pilot CHannels (CPICH), said process involving the steps of separating the two signals by means of computation and computing the frequency offset on the base of the two separated signals

Abstract: To detect a cell-specific synchronization signal, a modified correlation approach is used, which removes the need for channel estimation.