Abstract: This device (10) includes elements (12) for receiving an analogical signal including a data signal in a frequency channel, elements (18) for amplifying the received signal, elements (20) for filtering the amplified signal so as to cut out frequencies outside the frequency channel of the data signal, members (24) for converting the filtered analogical signal into a digital signal, elements (32) for measuring the power (Pwhole) of the whole received signal after amplification and before filtering, and members (26) for determining an amplification control signal for the received signal amplification as a function of the received signal measured power (Pwhole).

Abstract: Method of decoding a DVB digital television service by a handheld DVB-H digital television receiver intended to be integrated into a terminal, characterized in that it includes: a step of retaining in memory, in a memory of the terminal (2), SI/PSI tables, while the terminal is switched off; a step of switching on (28) the terminal; a step of loading (30) the SI/PSI tables from the memory of the terminal; and a step of attempted decoding (40), of the DVB service using the SI/PSI tables loaded.

Abstract: This amplifier (10) for radio frequency signals comprises a circuit adapted to amplify the signals within a first range of frequency (19) and is characterized in that said circuit is also adapted to simultaneously attenuate the signals within a second range of frequency (18).

Abstract: The method is for estimating a phase and gain mismatch of a base band digital signal. It comprises: determining (10) weight coefficients depending upon the likelihood of the frequency values of a segment of said base band digital signal; and determining (26) the phase and gain mismatch for the segment using the weight coefficients.

Abstract: The reception method including: a step of recovering (18) a transport packet TS, the transport packet TS conveying a SI/PSI table, and the SI/PSI table including a version field; and a step of reading (20) the value of the version field of the SI/PSI table conveyed by the transport packet TS, is characterized in that it includes: a step of comparison (22) of the read value of the version field of the SI/PSI table with a recorded value; and in the case where the read value is different from the recorded value: a step of recovery (30) of the whole of the SI/PSI table; and a step of recording (32) the read value in place of the recorded value.

Abstract: The method includes determining (100) a first surface of a first coverage zone, determining (102) second surfaces of second coverage zones, determining (104), amongst the second coverage zones, a second coverage zone, referred to as the most probable second coverage zone, whose second surface has the greater overlapping with the surface of the first coverage zone, and attempting (106) to synchronize the turner with a second signal emitted over the most probable second coverage zone, in order to receive a second service.

Abstract: A method for scanning frequencies of a network by a tuner, in order to determine available frequencies, the network including a plurality of coverage zones, a respective signal being emitted over each coverage zone of the network, at a respective frequency, the tuner being located in one of the coverage zones, referred to as the current coverage zone, a signal, referred to as the current signal, being emitted over the current coverage zone, the current signal conveying a plurality of services according to a time slicing method. The method includes obtaining a group of frequency values of the frequencies of coverage zones of the network, and during time intervals separating the time slices dedicated to the at least one service intended to be received, the tuner scanning all the frequency values of the group in order to determine available frequencies, whatever is the number of frequency values in the group.

Abstract: The present invention relates to a method for measuring radio channel quality in a radio communication system. In the method a modulated signal is received over a communication channel. The modulated signal has been modulated by using modulation parameters. A decoder decodes (305) the modulated signal and forms decoded data. The decoder creates (306) a decoder performance indicator (PS) that depends on the decoded data. Then a radio channel quality indicator (RCQI) is created, the radio channel quality indicator being essentially independent of the modulation parameters.

Abstract: This demodulator for signals transmitted by bursts of data packets and the corresponding method comprise receiving from a separate processor identifiers of bursts to be processed, filtering the signals to retrieve the bursts whose identifiers were received, processing said retrieved bursts, receiving from said separate processor timing information associated with the identifiers of bursts to be processed; and power management to drive at least some components of said demodulator between an idle state and an active state depending upon said timing information.

Abstract: A wireless mobile device comprising a tuner for converting a received radio frequency signal to a base band signal or intermediate frequency signal and providing the base band signal or intermediate frequency signal to a receiver, wherein the receiver is arranged to provide received data associated with the base band signal or intermediate frequency signal to an application processor for storage in memory, wherein the application processor is arranged to extract the data from memory in an interleaved form and perform error correction on the interleaved data.

Abstract: The packet interleaving method includes selecting successive input sets of consecutive input packets (X1 . . . XNin) received from a forward correction module (14), each input packet (Xj) being a vector of constellation points of a predetermined constellation diagram. For each input set, it further includes generating an output set of output packets (O1 . . . ONout), each output packet (Om) being a vector of constellation points, by distributing the constellation points of each input packet (Xj) of the input set, and sending the output packets (O1 . . . ONout) of the output set to a modulator (18). The input set including Nin input packets (X1 . . . XNin) and each of the Nin input packets (X1 . . . XNin) including a same number Lin of constellation points, the number Nout of output packets in the output set is related to Lin by the relation Lin=A×Nout, where A is a fixed whole number.

Abstract: This method for receiving a data stream transmitted over several radiofrequency channels each with a different frequency, comprises scanning the bandwidth to identify available radiofrequency channels, determining a quality indicator for each available radiofrequency channel and selecting a channel for receiving the data stream depending upon said quality indicators. The method further comprises determining a refreshing period for the quality indicator of each available channel and weighting every determined refreshing period depending on the value of the quality indicator of the currently received channel.

Abstract: This device (12, 14) for mixing radiofrequency signals (RF) comprises: —a mixer circuit (18, 20) adapted to mix at least two signals, one of which is a radiofrequency signal; and —a current mirror circuit (22, 24) receiving signals delivered by the mixer circuit and delivering output signals. Wherein said current mirror circuit (18, 20) has two stages, each with a low pass passive filter.

Abstract: A reception device includes a number of reception paths and a decoder. The reception paths are sequenced and each reception path includes a calculation module embodied to deliver a combined confidence index and a combined data stream, from the confidence index and the equalized data stream for the current path, as well as, for the subsequent reception paths after the first path, from the combined confidence index and the combined data stream, for the preceding path. The decoder is embodied to only process the combined confidence index and the combined data stream, provided by the calculation module in the last path.

Abstract: This method for receiving a data stream transmitted over several radiofrequency channels each with a different frequency, comprises scanning the bandwidth to identify available radiofrequency channels, determining a quality indicator for each available radiofrequency channel and selecting a channel for receiving the data stream depending upon said quality indicators. The method further comprises determining a refreshing period for the quality indicator of each available channel and weighting every determined refreshing period depending on the value of the quality indicator of the currently received channel.

Abstract: A device for receiving a radio frequency signal including consecutive bursts of data, the device includes a demodulating unit (12) having a plurality of processing elements (16) forming a data path for demodulating the radio frequency signal, a power management module (18) for activating the processing elements (16) before the reception of a burst of data. The power management module (18) is adapted to successively activate the processing elements (16) starting from an activation time.

Abstract: A method of detecting an impulse noise component for a data transmission signal in a mobile environment includes receiving over a communication channel a demodulated signal having an input signal level subject to a fading condition where the input signal level varies without the presence of the impulse noise component; estimating a variation of the input signal level independently of the impulse noise component under the fading condition to obtain a robust signal level estimate of the signal; and detecting the impulse noise component based on the robust signal level estimate and the input signal level. The method also includes reducing the impulse noise component by cancelling a signal component of the received signal whose impulse noise component has been detected.

Abstract: This device (10) includes elements (12) for receiving an analogical signal including a data signal in a frequency channel, elements (18) for amplifying the received signal, elements (20) for filtering the amplified signal so as to cut out frequencies outside the frequency channel of the data signal, members (24) for converting the filtered analogical signal into a digital signal, elements (32) for measuring the power (Pwhole) of the whole received signal after amplification and before filtering, and members (26) for determining an amplification control signal for the received signal amplification as a function of the received signal measured power (Pwhole).

Abstract: The present invention relates to a method for measuring radio channel quality in a radio communication system. In the method a modulated signal is received over a communication channel. The modulated signal has been modulated by using modulation parameters. A decoder decodes (305) the modulated signal and forms decoded data. The decoder creates (306) a decoder performance indicator (PS) that depends on the decoded data. Then a radio channel quality indicator (RCQI) is created, the radio channel quality indicator being essentially independent of the modulation parameters.

Abstract: This integrated tuner circuit (2) for radiofrequency signals is suitable to be connected to at least one antenna (22; 42A, 42B), wherein the integrated circuit comprises an internal resonance stage (10) with at least one trimable capacitance (12) adapted to be connected to the antenna and to resonate therewith and wherein the integrated circuit also comprises a control unit (20) adapted to control the value of said at least one trimable capacitance to change the resonance value of the antenna.