Abstract: A receiver for receiving data in a broadcast system includes a broadcast receiver that receives, via the broadcast system, a receiver input data stream including plural channel symbols represented by constellation points in a constellation diagram. A demodulator demodulates the channel symbols into codewords and a decoder decodes the codewords into output data words. A broadband receiver obtains redundancy data via a broadband system, the redundancy data for a channel symbol including one or more least robust bits of the channel symbol or a constellation subset identifier indicating a subset of constellation points including the constellation point representing the channel symbol. The demodulator and/or the decoder is configured to use the redundancy data to demodulate the respective channel symbol and to decode the respective codeword, respectively.

Abstract: Embodiments provide a transmission method of wireless transmission of data within a communication system (e.g. a sensor network or telemetry system). The system includes a step of transmitting the data while using at least two time hopping patterns and/or frequency hopping patterns, a second pattern of the at least two patterns being a time- and/or frequency-shifted version of a first pattern of the at least two patterns.

Abstract: An apparatus and a corresponding method for mapping payload data of mapping input data streams onto a mapping output data stream having a channel bandwidth for transmission in a multi-carrier broadcast system includes first and second frame forming mechanisms. The first frame forming mechanism is adapted to form first frames having a first frame structure and the second frame forming mechanism is adapted to form second frames having a second frame structure. Preferably, in a second frame structure the data blocks of a particular mapping input data stream are spread in time and frequency over various data symbols and various data segments of the second frames to provide high robustness against disturbances. The payload portion of the second frame is preferably segmented into various data segments enabling use of a narrow-band receiver, even if both the first and second frames cover the same total channel bandwidth.

Abstract: Embodiments provide a transfer method for transferring data of variable length using a fixedly specified number of sub-data packets to which the data of variable length is distributed.

Abstract: Embodiments provide a data receiver with a unit for receiving sub-data packets, a unit for determining a phase difference and a unit for determining a distance difference. The unit for receiving sub-data packets is configured to receive at least two sub-data packets from a data transmitter, and to combine the at least two sub-data packets to obtain a data packet that is transmitted split into the at least two sub-data packets by the data transmitter, wherein each of the at least two sub-data packets is shorter than the data packet, wherein the unit for receiving sub-data packets is configured to receive the at least two sub-data packets on at least two different carrier frequencies. The unit for determining a phase difference is configured to determine a phase difference between the at least two sub-data packets that is caused by the at least two different carrier frequencies and the path delay.

Abstract: A receiver for receiving data in a broadcast system comprises a broadcast receiver that receives via said broadcast system a receiver input data stream comprising a plurality of channel symbols represented by constellation points in a constellation diagram, a demodulator that demodulates said channel symbols into codewords, and a decoder that decodes said codewords into output data words. A redundancy calculator determines a required amount of redundancy data required for correct demodulation and decoding by use of the originally received channel symbol and additional redundancy data. A broadband request unit requests, if demodulation of a channel symbol and/or decoding of a codeword is erroneous or likely to fail, a required amount of redundancy data via a broadband system, that is received by a broadband receiver via said broadband system. Said demodulator and/or said decoder is configured to use said redundancy data for demodulation and decoding, respectively.

Abstract: A receiver for receiving data in a broadcast system includes a broadcast receiver that receives, via the broadcast system, a receiver input data stream including plural channel symbols represented by constellation points in a constellation diagram. A demodulator demodulates the channel symbols into codewords and a decoder decodes the codewords into output data words. A broadband receiver obtains redundancy data via a broadband system, the redundancy data for a channel symbol including one or more least robust bits of the channel symbol or a constellation subset identifier indicating a subset of constellation points including the constellation point representing the channel symbol. The demodulator and/or the decoder is configured to use the redundancy data to demodulate the respective channel symbol and to decode the respective codeword, respectively.

Abstract: A transmitter and transmission method for broadcasting data. To enable a receiver, such as a moving receiver, to improve decoding quality, if needed, a transmitter includes: a data input receiving at least one transmitter input data stream segmented into input data words; an encoder error correction code encoding the input data words into codewords including a basic codeword portion and an auxiliary codeword portion, the encoder generating the basic codeword portion from an input data word according to a first code and generating the auxiliary codeword portion from an input data word according to a second code, the basic codeword portion for regular decoding and the auxiliary codeword portion for incremental redundancy if regular decoding of the codeword by using the basic codeword portion is erroneous; a data mapper mapping the codewords onto frames of a transmitter output data stream; and a transmitter transmitting the transmitter output data stream.

Abstract: The invention relates to a method for determining the position of a first sensor node relative to a second sensor node, wherein the first and the second sensor nodes are communicatively connected to each other and are a constituent part of a sensor network, comprising the method steps: reception of signal sections of transmitted signals from at least two transmitters by the first and the second sensor node, beginning at a time t1 for a time period tRX; determining the angle of incidence of the transmitted signals to at least one of the sensor nodes; determining the distance between the sensor nodes from the propagation time differences of the transmitted signals from the at least two transmitters received at the first and second sensor nodes; determining the position of the first sensor node relative to the second sensor node from the distance between the sensor nodes and the angle of incidence of the transmitted signals, wherein the sensor nodes determine the time t1 and the time period t1 in relation to a r

Abstract: The present invention relates to an apparatus and a corresponding method for mapping error correction code encoded time-domain data of at least two mapping input data streams (S1, S2, . . . , Sn) onto a time-domain mapping output data stream (Q) having a frame structure, comprising a data input (102) for receiving said at least two mapping input data streams (S1, S2, . . . , Sn) each being segmented into data blocks (D1, D2, . . . , DN) carrying error correction code encoded data, a data mapper (104) for mapping the data blocks (D1, D2, . . . , DN) of said at least two mapping input data streams (S1, S2, . . . , Sn) onto frames of said mapping output data stream (Q), each frame comprising a number of frame intervals (F1, F2, . . . , FM), wherein the data mapper (104) is adapted for mapping the data blocks (D1, D2, . . . , DN) onto said frame intervals such that each frame interval (F1, F2, . . . , FM) carries sequentially arranged data blocks (D1, D2, . . .

Abstract: The invention relates to a method for the frequency error correction of an oscillator of a sensor node in a sensor network, comprising the following steps: receiving a transmission signal of a transmitter, the signal being modulated by orthogonal frequency division multiplexing (OFDM); determining the frequency deviation of the oscillator using the received transmission signal; determining a correction signal for correcting the frequency deviation of the oscillator and correcting the frequency of the oscillator by means of the correction signal.

Abstract: A data transmitter is provided, having: a generator for generating transmission data packets, configured to split a first data packet into at least three transmission data packets, each of the transmission packets being shorter than the first data packet, the generator being configured to channel-encode the at least three transmission packets such that only a portion thereof is required for decoding the first data packet; a transmission element for transmitting data packets, configured to transmit the at least three transmission packets in a frequency channel via a communications channel with a time gap; a monitor element for monitoring the frequency channel, configured to recognize an interference or transmission of a further data transmitter in the frequency channel; the transmission element being configured not to transmit via the communications channel a packet, waiting for transmission, of the at least three transmission packets if an interference or transmission from a further data transmitter is recogn

Abstract: Embodiments provide a receiver having a receiving unit and a synchronization unit. The receiving unit is configured to receive a data packet having a pilot sequence. The synchronization unit is configured to separately correlate the pilot sequence with at least two partial reference sequences corresponding to a reference sequence for the pilot sequence of the data packet, in order to obtain a partial correlation result for each of the at least two partial reference sequences, wherein the synchronization unit is configured to non-coherently add the partial correlation results in order to obtain a coarse correlation result for the data packet.

Abstract: A data transmitter is provided, having: a generator for generating transmission data packets, configured to split a first data packet destined for a first data receiver into at least two transmission data packets, wherein each of the transmission data packets destined for the first data receiver is shorter than the first data packet; a transmission element for transmitting data packets, configured to transmit the at least two transmission data packets destined for the first data receiver via a communications channel with a time gap; wherein the transmission element for transmitting data packets is configured to transmit at least one further transmission data packet to the first data receiver or a second data receiver in the time gap between the at least two transmission data packets destined for the first data receiver.

Abstract: A transmitter is configured to operate in a mobile communication system according to a mobile communication standard (e.g., 3GPP), wherein resources of the communication system are divided into resources elements. The transmitter is also configured to transmit an additional telegram by separating the telegram into a plurality of data packets, each of the data packets being shorter than the telegram, and transmitting each of the data packets respectively in one of the resource elements.

Abstract: A receiver for receiving data in a broadcast system comprises a broadcast receiver that receives via said broadcast system a receiver input data stream comprising a plurality of channel symbols represented by constellation points in a constellation diagram, a demodulator that demodulates said channel symbols into codewords, and a decoder that decodes said codewords into output data words. A redundancy calculator determines a required amount of redundancy data required for correct demodulation and decoding by use of the originally received channel symbol and additional redundancy data. A broadband request unit requests, if demodulation of a channel symbol and/or decoding of a codeword is erroneous or likely to fail, a required amount of redundancy data via a broadband system, that is received by a broadband receiver via said broadband system. Said demodulator and/or said decoder is configured to use said redundancy data for demodulation and decoding, respectively.

Abstract: What is described is an Radio Frequency Identification (RFID) tag configured for communicating with an Radio Frequency Identification (RFID) reader, wherein the RFID tag is configured to receive a query command from the RFID reader, to measure a duration of a TRcal signal comprised by the query command, and to determine an individual Backscatter Link Frequency for communicating with the RFID reader based on the measured duration of the TRcal signal. The invention also refers to an RFID reader and to a corresponding method.

Abstract: A receiver for receiving data in a broadcast system comprises a broadcast receiver that receives via said broadcast system a receiver input data stream comprising a plurality of channel symbols represented by constellation points in a constellation diagram, a demodulator that demodulates said channel symbols into codewords, and a decoder that decodes said codewords into output data words. A redundancy calculator determines a required amount of redundancy data required for correct demodulation and decoding by use of the originally received channel symbol and additional redundancy data. A broadband request unit requests, if demodulation of a channel symbol and/or decoding of a codeword is erroneous or likely to fail, a required amount of redundancy data via a broadband system, that is received by a broadband receiver via said broadband system. Said demodulator and/or said decoder is configured to use said redundancy data for demodulation and decoding, respectively.

Abstract: An RFID reader includes a transmitter, a receiver, and an evaluator. The receiver receives signals from RFID tags within a given number of slots of a time frame with a given frame size and provides a number of successful slots and a number of collided slots. The evaluator sets a modified frame size based on an estimated number of RFID tags which is determined based on the frame size, the number of successful slots, and the number of collided slots. The invention also refers to a corresponding method.

Abstract: The present invention relates to an apparatus and a corresponding method for mapping error correction code encoded time-domain data of at least two mapping input data streams (S1, S2, . . . , Sn) onto a time-domain mapping output data stream (Q) having a frame structure, comprising a data input (102) for receiving said at least two mapping input data streams (S1, S2, . . . , Sn) each being segmented into data blocks (D1, D2, . . . , DN) carrying error correction code encoded data, a data mapper (104) for mapping the data blocks (D1, D2, . . . , DN) of said at least two mapping input data streams (S1, S2, . . . , Sn) onto frames of said mapping output data stream (Q), each frame comprising a number of frame intervals (F1, F2, . . . , FM), wherein the data mapper (104) is adapted for mapping the data blocks (D1, D2, . . . , DN) onto said frame intervals such that each frame interval (F1, F2, . . . , FM) carries sequentially arranged data blocks (D1, D2, . . .