Abstract: Embodiments include devices and methods for generating a preamble symbol and also transmitting and receiving a signal comprising the preamble symbol. It is proposed a preamble symbol which achieves a robust and simple frame detection and synchronization, quick and reliable detection of embedded signaling data at low complexity and with a low Peak to Average Power Ratio (PAPR). The proposed preamble symbol has three parts, denoted front part, central part and back part. The front part and the back parts comprise a similar correlation sequence which is used for preamble detection, coarse time synchronization and fractional frequency error estimation. While the central part comprises consecutive blocks of samples comprising a predetermined reference information and signaling data which are used for coarse frequency synchronization and conveying data.

Abstract: A radio signal is provided by: determining a first position J1 and a second position J2 in a block of K samples; applying a DFT-spread-OFDM-type scheme to the block, and obtaining an output signal representing a symbol comprising N complex samples Sn in the radio signal; determining, in the output signal, a first position T1 and a second position T2; inserting, between the first position T1 and the second position T2 of the updated output signal, S reference samples and L cyclic prefix samples, to obtain a subsequent signal representing a hybrid symbol comprising a data section and a reference section; appending, to the hybrid symbol, a cyclic prefix of at least part of the hybrid symbol to obtain a signal representing the hybrid symbol appended with the cyclic prefix; and emitting the radio signal corresponding to the signal representing the hybrid symbol appended with the cyclic prefix.

Abstract: The invention relates to inserting reference signals in a radio signal to be transmitted over a wireless communication system, the radio signal being emitted according to a specific SS-STBC scheme, the method comprising, inserting the reference signals to transmit them in the radio signal such as samples of these reference signals are in specific positions in the SS-STBC symbol.

Abstract: Example implementations relate to a method for synchronizing a specific node connected to a plurality of other nodes. The method comprises receiving a respective synchronization quality value for a transmitting other node. The method also comprises measuring a respective propagation medium quality value with the transmitting other node. The method further comprises updating a specific synchronization reference of the specific node, whereby the updating comprises assigning to a respective contribution of the transmitting other node a respective weight of the transmitting other node, the respective weight being a function of the respective synchronization quality value of the transmitting other node and of the respective propagation medium quality value with the transmitting other node. The method also comprises revising a specific synchronization quality value and emitting to a receiving other node the revised specific synchronization quality value.

Abstract: A radio signal is provided by: determining a first position J1 and a second position J2 in a block of K samples; applying a DFT-spread-OFDM-type scheme to the block, and obtaining an output signal representing a symbol comprising N complex samples Sn in the radio signal; determining, in the output signal, a first position T1 and a second position T2; inserting, between the first position T1 and the second position T2 of the updated output signal, S reference samples and L cyclic prefix samples, to obtain a subsequent signal representing a hybrid symbol comprising a data section and a reference section; appending, to the hybrid symbol, a cyclic prefix of at least part of the hybrid symbol to obtain a signal representing the hybrid symbol appended with the cyclic prefix; and emitting the radio signal corresponding to the signal representing the hybrid symbol appended with the cyclic prefix.

Abstract: Embodiments include apparatuses and methods of identifying line of sight, LOS, and non-line of sight, NLOS, conditions in a multipath channel of a vehicular communication system. It is proposed to equip the receiving node with a dual antenna receiver. Then the proposed solution uses the first cluster of multipath components of channel estimates measured on the two antennas to derive the LOS/NLOS channel conditions based on hypothesis testing.

Abstract: Embodiments include devices and methods for generating a preamble symbol and also transmitting and receiving a signal comprising the preamble symbol. It is proposed a preamble symbol which achieves a robust and simple frame detection and synchronization, quick and reliable detection of embedded signaling data at low complexity and with a low Peak to Average Power Ratio (PAPR). The proposed preamble symbol has three parts, denoted front part, central part and back part. The front part and the back parts comprise a similar correlation sequence which is used for preamble detection, coarse time synchronization and fractional frequency error estimation. While the central part comprises consecutive blocks of samples comprising a predetermined reference information and signaling data which are used for coarse frequency synchronization and conveying data.

Abstract: The invention relates to inserting a first and a second Reference Signals in a radio signal to be transmitted over a wireless communication system, the radio signal being emitted according to a specific SC-SFBC scheme, the method comprising: determining K integers such as { n i | i ? ? 1 ; K ? , 0 ? n i ? M 2 - 1 , ? i , j ? ? 1 ; K ? 2 , i < j ? n i < n j } ; and for each pair i of first and second Reference Signals: inserting the first Reference Signal in the radio signal, such as samples of the first Reference Signal are in time periods in the radio signal, said time periods being dependent on a first position in the block of symbols processed by the specific SC-SFBC scheme; inserting the second Reference Signal in the radio signal, such as samples of the second Reference Signal are in time periods in the radio signal, said time periods being dependent on a specific position according to the first position in the same block of symbols.

Abstract: The invention relates to inserting reference signals in a radio signal to be transmitted over a wireless communication system, the radio signal being emitted according to a specific SS-STBC scheme, the method comprising, inserting the reference signals to transmit them in the radio signal such as samples of these reference signals are in specific positions in the SS-STBC symbol.

Abstract: Embodiments include digital signal processing units, a transmitting device for a wireless communication system and methods of processing a composite time domain signal having a plurality of parallel and independent signals that collectively form a parallel communication. It is proposed a new waveform configuration suitable for 5G and that is able to reduce out-of-band (OOB) emissions which are received on a first time domain signal associated to a first sub-band where the OOB emissions originate from an OFDM time domain signal associated with a second sub-band adjacent to the first sub-band. The proposed solution is partly based on filtered-OFDM with the exception that sub-band filtering is not performed on all the samples of the stream of OFDM symbols. Instead, filtering is performed only, for each OFDM time domain signal, where transition occurs between consecutive OFDM symbols.

Abstract: The invention relates to inserting a first and a second Reference Signals in a radio signal to be transmitted over a wireless communication system, the radio signal being emitted according to a specific SC-SFBC scheme, the method comprising: determining K integers such as { n i | i ? ? 1 ; K ? , 0 ? n i ? M 2 - 1 , ? i , j ? ? 1 ; K ? 2 , i < j ? n i < n j } ; and for each pair i of first and second Reference Signals: inserting the first Reference Signal in the radio signal, such as samples of the first Reference Signal are in time periods in the radio signal, said time periods being dependent on a first position in the block of symbols processed by the specific SC-SFBC scheme; inserting the second Reference Signal in the radio signal, such as samples of the second Reference Signal are in time periods in the radio signal, said time periods being dependent on a specific position according to the first position in the same block of symbols.

Abstract: A method and a device for forming a DFT-spread OFDM symbol including data and pilots, comprising: forming a pilot symbol in the time domain, the pilot symbol comprising at least two parts, a first part of the pilot symbol comprising samples of front pilots, a second part of the pilot symbol comprising null values, performing a DFT-spread OFDM modulation of the pilot symbol, precoding the data, putting the precoded data under the form of a data symbol in the time domain, the data symbol comprising at least two parts, a first part of the data symbol comprising null values, a second part of the data symbol comprising the data, performing a DFT-spread OFDM modulation of the data symbol, modifying a part of the DFT-spread OFDM modulated data symbol, combining the modified DFT-spread OFDM modulated data to the DFT-spread OFDM modulated pilot symbol.

Abstract: Embodiments include digital signal processing units, a transmitting device for a wireless communication system and methods of processing a composite time domain signal having a plurality of parallel and independent signals that collectively form a parallel communication. It is proposed a new waveform configuration suitable for 5G and that is able to reduce out-of-band (OOB) emissions which are received on a first time domain signal associated to a first sub-band where the OOB emissions originate from an OFDM time domain signal associated with a second sub-band adjacent to the first sub-band. The proposed solution is partly based on filtered-OFDM with the exception that sub-band filtering is not performed on all the samples of the stream of OFDM symbols. Instead, filtering is performed only, for each OFDM time domain signal, where transition occurs between consecutive OFDM symbols.

Abstract: A method and a device for forming a DFT-spread OFDM symbol including data and pilots, comprising: forming a pilot symbol in the time domain, the pilot symbol comprising at least two parts, a first part of the pilot symbol comprising samples of front pilots, a second part of the pilot symbol comprising null values, performing a DFT-spread OFDM modulation of the pilot symbol, precoding the data, putting the precoded data under the form of a data symbol in the time domain, the data symbol comprising at least two parts, a first part of the data symbol comprising null values, a second part of the data symbol comprising the data, performing a DFT-spread OFDM modulation of the data symbol, modifying a part of the DFT-spread OFDM modulated data symbol, combining the modified DFT-spread OFDM modulated data to the DFT-spread OFDM modulated pilot symbol.

Abstract: The invention concerns multi-carrier based digital telecommunication systems where the channel is used to transport several data streams according to the frequency division multiple access scheme. The proposed method concerns a mapping of data on physical resource in a transmission system where data of elementary streams is distributed over several physical resource blocks, and within each resource block in order to get data from a plurality of elementary streams on at least one sub-carrier and at least a symbol time of each physical resource block. This allows to achieve a good diversity of the allocation of the different streams, leading to the advantage, among others, that poor transmission conditions affecting a particular sub-carrier or a particular time duration, will not concentrate its effects on a particular stream.

Abstract: The invention concerns multi-carrier based digital telecommunication systems where the channel is used to transport several data streams according to the frequency division multiple access scheme. The proposed method concerns a mapping of data on physical resource in a transmission system where data of elementary streams is distributed over several physical resource blocks, and within each resource block in order to get data from a plurality of elementary streams on at least one sub-carrier and at least a symbol time of each physical resource block. This allows to achieve a good diversity of the allocation of the different streams, leading to the advantage, among others, that poor transmission conditions affecting a particular sub-carrier or a particular time duration, will not concentrate its effects on a particular stream.