Abstract: A transmission band of an analog signal including successive symbols to be transmitted is notched, where each symbol includes sub-carriers to be modulated. In particular, in each symbol the sub-carriers corresponding to a part of the transmission band to be notched are suppressed. In addition, in each symbol a chosen part of the remaining sub-carriers to be modulated is also suppressed.

Abstract: An equalizer for a multi carrier transmission system, converts a transmitted multi carrier signal into sampled frequency domain signals, and suppresses time domain delay dispersion, on the sampled frequency domain signals. It exploits circulant decomposition of a Toeplitz matrix to enable the computationally heavy evaluation of a matrix multiplied by a vector, to be avoided. Increased precision arises from the frequency domain processing being equivalent to a longer time domain FIR filter than is normally practical. The amount of compensation for different carriers can be adjusted, which can lead to increased precision.

Abstract: A device for decoding an incident FEC encoded packet of data within an ARQ scheme. The device includes a processor or processing means for performing successive decoding processes of successive intermediate FEC code encoded packets related to the incident FEC code encoded packet. The processor or processing means includes a FEC decoder. The processor or processing means included a determination unit or determination means for determining initial decoding conditions from the FEC code decoding result concerning the preceding intermediate FEC code encoded packet and from the current intermediate FEC code encoded packet, and the FEC decoder is for performing the current FEC code decoding using the initial decoding conditions.

Abstract: Filtered digital information representative of the power of an output signal from an amplifier is generated, and control information from a setpoint representative of a desired power for the output signal is generated from the desired response time for the establishment of the power and from a model to be followed for the establishment. In addition, a gain control and a bias current control are established for each initial variable-gain amplifier from the filtered digital information, from the control information and from a polynomial digital regulation of the RST type whose polynomial coefficients are determined from input parameters comprising characteristics of each variable-gain amplifier and from characteristics of the filter generating the filtered digital information.

Abstract: A method for de-interleaving S2 received sequences of interleaved received data samples respectively issued from S2 physical channels and to be associated with S1 output transport channels is provided. The S2 received sequences have been delivered, before transmission by a two-stage multi-interleaving device, from S1 initial sequences of ordered data samples respectively associated to S1 initial transport channels. The two-stage multi-interleaving device includes a first stage including S1 interleaving blocks respectively associated to the S1 initial transport channels, a second stage including S2 interleaving blocks respectively associated to the S2 physical channels, and an inter-stage of predetermined data-routing functions connected between the first and second stages.

Abstract: A wireless apparatus includes a millimeter-wave communication interface configured to exchange information within a millimeter-wave communication network, an UWB communication interface and control means or circuitry configured to activate the UWB interface for communicating location indication to the communication network according to an UWB communication standard. The location indication is intended for locating the wireless apparatus within the network.

Abstract: A method for converting a sampling frequency of a digital signal sampled at a first sampling frequency includes receiving digital signal input samples, and forming output samples corresponding to a second sampling frequency based on the digital signal input samples and an interpolation filter. The first sampling frequency may be larger than the second sampling frequency. The method may further include delivering the output samples. Forming output samples includes, for each of the digital signal input samples, updating current values of N successive output samples with N contributions. The N contributions may be respectively calculated based on a value of a current input sample of the digital input samples weighted by values of N filter coefficients associated with the current input sample, N being fixed and identical for all the digital signal input samples regardless of a value of the conversion ratio between the first and second sampling frequencies.

Abstract: The method and device include the generation of two output signals (IRF, QRF) in phase quadrature, having a frequency spectrum including a dominant harmonic at a wanted frequency FC. The generation of a periodic basic signal (VP) having a frequency FOSC equal to the product of R and the desired frequency FC is included, R being a non-integer rational number greater than one and equal to a ratio p/q, in which p is an integer multiple of 4 and q an odd integer. Also included is a processing of the basic signal including, for example, at least a preprocessing having a frequency division by p with elimination of the even harmonics and a frequency multiplication by q.

Abstract: A Bluetooth master radio frequency unit addresses a slave radio frequency unit, to enable the slave to resynchronize to the master, by sending poll packets or null packets, the master being arranged to send sufficient null packets to enable the slave to resynchronize, before sending a poll packet, to determine whether the slave has resynchronized. This approach can provide the slave with the same number of synchronization packets as in the simpler algorithms, while allowing the slave to preserve more (transmit) power and still allowing the master to detect whether the slave has resynchronized or not (and thus to update a Link Supervision Timer for example). Notably this is also suitable for use in prescheduling implementations.

Abstract: A method for processing an incident pulsed signal of an ultra wide band type received over a channel by a data device operating in a wireless data communications system is provided. The incident pulsed signal carries information within a super-frame structure. Upon reception of each super-frame structure by a data device, coarse synchronization is performed with another data device acting as a coordinator device for the wireless data communications system. The coarse synchronization uses a first training sequence. Upon reception of each frame allocated to the data device operating within the super-frame structure, channel estimation is performed using a second training sequence. The channel estimation also performs a frame synchronization.

Abstract: An Nth-order shaping coder with multi-level quantization and dithered quantizer. The coder is inherently stable and produces a purely white quantization error spectrum. In one exemplary embodiment, the coder is first order, and an improved dither scheme is employed including applying a M-times (e.g., M=2) sample-and-hold to the dither sequence, effectively holding a constant dither for multiple clock cycles. This advantageously results in a reduction of instances where the quantizer jumps over two quantization intervals in one clock cycle without first passing through zero for one clock cycle. Methods for implementing the shaping coder are also disclosed.

Abstract: A method for de-interleaving S2 received sequences of interleaved received data samples respectively issued from S2 physical channels and to be associated with S1 output transport channels is provided. The S2 received sequences have been delivered, before transmission by a two-stage multi-interleaving device, from S1 initial sequences of ordered data samples respectively associated to S1 initial transport channels. The two-stage multi-interleaving device includes a first stage including S1 interleaving blocks respectively associated to the S1 initial transport channels, a second stage including S2 interleaving blocks respectively associated to the S2 physical channels, and an inter-stage of predetermined data-routing functions connected between the first and second stages.

Abstract: A device for processing data to be interleaved and stored in target memories includes N interleaving buffers, N producers, and N cells. Each cell includes a register bank of size W, and a delay circuit. The variable M defines a maximum number of concurrent write operations supported per time step W, and defines a maximum buffer size. These parameters are chosen to reflect a standard case. At any time step, each of the N interleaving buffers receives m log-likelihood ratio (LLR) inputs and writes up to M of these into the register banks. When m is larger than M, m-M producers are delayed by the delay circuit. When a buffer overflow occurs (more than W LLRs values), m producers are delayed by the delay circuit. One LLR value is fetched from the register bank and is written in an SRAM interleaving memory.

Abstract: The method and device include determining by removing N?N, rows from an original generator matrix (G) defining the LDPC code and having N rows and N?M columns for obtaining a generator sub-matrix (G1) having N?M columns and N1 rows. The method also includes delivering by receiving an input data vector of size N?M and multiplying the input vector with the generator sub-matrix for obtaining the punctured encoded code word.

Abstract: The method is for detecting the eventual presence of an interferer that is adapted to interfere with a wireless device. The wireless device is provided with at least one receiving chain including an analog to digital conversion stage. The method includes receiving on the receiving chain an incident signal, and delivering to the ADC stage an analog signal from the incident signal. The method further includes elaborating or determining a binary information from a binary signal delivered by the ADC stage and representative of the level of the analog signal, analyzing a temporal evolution of the binary information and detecting the presence of the interferer from the analysis.

Abstract: A radio frequency digital-to-analog converter with a programmable current output. In exemplary aspects of the invention, improved apparatus and methods for providing (i) current mirror matching, (ii) enhanced current pulse rising edge performance, (ii) reduced base voltage swing, and (iv) compensated high voltage swing, are provided. The foregoing apparatus and methods can be applied to any RF signal application (wireless or otherwise), including for example wireless cellular handsets.

Abstract: This method for carrying out the flexible demodulation of data modulated following an amplitude modulation in quadrature is used in a communications system employing a code division multiple access technique (CDMA) and an optical frequency division multiplexing (OFDM) using non-binary spread codes. The invention includes steps for determining a simplified expression specific to the logarithm of the likelihood ratio.

Abstract: A system and method is provided for estimating a sequence of N bits ({circumflex over (x)}0{circumflex over (x)}1 . . . {circumflex over (x)}N?1) corresponding to a received sequence of M digital data (r0r1 . . . rM?1). The method includes determining candidate sequences of MRS digital data from a reduced reference sequence space comprising 2NRS reduced reference sequences of MRS reference digital data (s0s1 . . . sMRS?1), MRS being less than M, and 2NRS being less than or equal to 2N. The method further includes making up each candidate sequence with remaining reference symbols to obtain at least one complete candidate sequence of M digital data, and determining the sequence of N bits ({circumflex over (x)}0{circumflex over (x)}1 . . . {circumflex over (x)}N?1) from the complete candidate sequences.

Abstract: The method is for managing the operation of a wireless communication device including several different communication modules respectively adapted to operate according to several given communication protocols including a UWB module operating according to a UWB protocol based on an OFDM modulation scheme. The method includes controlling the UWB module for scanning a chosen frequency band, and managing a communication to be performed by the device on the basis of the scanning result.

Abstract: A receiver and a method for receiving a signal including a carrier modulated with a known training sequence is described in which an estimate a carrier frequency offset is obtained from an autocorrelation signal by autocorrelation of the part of the received signal containing a known training sequence. The received signal is compensated with the frequency offset obtained to form a compensated received signal, and a timing reference for the received signal is obtained by cross-correlation of the compensated received signal with a known training sequence.