Method and device for generating two-frequency signal with constant binding containing four expanding signals and method and device for receiving such signal

FIELD: radio engineering, communication.

SUBSTANCE: according to the method, the four spreading signals s1(t), s2(t), s3(t), s4(t) of the base band are modulated, respectively, the frequency f1 and the frequency f2 so that on the carrier radio frequency fp=(f1+f2)/2, a multiplexed signal with a constant envelope is formed, with the signals s1(t) and s2(t), mutually orthogonal carrier phases are modulated at the frequency f1, signals s3(t) and s4(t), mutually orthogonal carrier phases are modulated at the frequency f2, f1>f2. The method includes determining a power ratio for the four spreading signals s1(t), s2(t), s3(t), s4(t) in the multiplexed signal with a constant envelope; storing the additional phases matching table containing additional phases belonging to the main frequency band of the in-phase component I(t) and belonging to the fundamental frequency band of the quadrature component Q(t) of the multiplexed signal with a constant envelope; receiving an additional phase θ of the current time segment by searching in the additional phases matching table; and forming the in-main frequency band of the in-phase component I(t) and belonging to the main frequency band of the quadrature component Q(t) of the multiplexed signal with a constant envelope; and forming a multiplexed signal SRF(t) with constant envelope based on the additional phases θ.

EFFECT: task achievement.

16 cl, 9 dwg, 2 tbl

 



 

Same patents:

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to transmitting and receiving data using multiple frequencies. Measurement of communication quality using a broadband signal and transmission and reception of data using a predetermined frequency band is carried out at approximately the same time. The transmitting device (1) is capable of transmitting data at a first frequency and a second frequency to a receiving device (2). The transmitter (1a) of the transmitting device (1) transmits a predetermined broadband signal in a first period of time in a frequency band which does not include the first frequency, and in a second period of time in a frequency band which does not include the second frequency. The quality measuring unit (2a) of the receiving device (2) measures quality of communication with the transmitting device (1) based on the broadband signal received in the first and second periods of time.

EFFECT: preventing quality degradation when transmitting and receiving data.

21 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to transmitting and receiving data using multiple frequencies. Measurement of communication quality using a broadband signal and transmission and reception of data using a predetermined frequency band are carried out at approximately the same time. The transmitting device (1) is capable of transmitting data at a first frequency and a second frequency to a receiving device (2). The transmitter (1a) of the transmitting device (1) transmits a predetermined broadband signal in a first period of time in a frequency band which does not include the first frequency, and in a second period of time in a frequency band which does not include the second frequency. The quality measuring unit (2a) of the receiving device (2) measures quality of communication with the transmitting device (1) based on the broadband signal received in the first and second periods of time.

EFFECT: preventing quality degradation when transmitting and receiving data.

3 cl, 21 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication engineering and can be used in wireless communication systems. The transmitter includes multiple transmitting antennae; a conversion unit configured to generate multiple signal sequences corresponding to a predefined frequency bandwidth from one or more transmission streams associated with any transmitting antenna; a precoding unit configured to set the weight of each signal sequence using a precoding matrix; and a transmitting unit configured to convert an output signal from the precoding unit into a number of signals corresponding to the number of transmitting antennae and transmit the converted signals from the transmitting antennae. If closed-loop control is performed, the precoding unit uses a precoding matrix selected from a codebook based on a precoding matrix indicator fed back from a receiver, and if open-loop control without relying on a feedback from the receiver is performed, the precoding unit uses a precoding matrix selected from a codebook such that mutually different precoding matrices are applied to different signal sequences.

EFFECT: high transmission throughput.

37 cl, 18 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication engineering and can be used in MIMO systems. Techniques to efficiently derive a spatial filter matrix are described. In a first scheme, a Hermitian matrix is iteratively derived based on a channel response matrix, and a matrix inversion is indirectly calculated by deriving the Hermitian matrix iteratively. The spatial filter matrix is derived based on the Hermitian matrix and the channel response matrix. In a second scheme, multiple rotations are performed to iteratively obtain first and second matrices for a pseudo-inverse matrix of the channel response matrix. The spatial filter matrix is derived based on the first and second matrices. In a third scheme, a matrix is formed based on the channel response matrix and decomposed to obtain a unitary matrix and a diagonal matrix. The spatial filter matrix is derived based on the unitary matrix, the diagonal matrix, and the channel response matrix.

EFFECT: high throughput of transmission channels.

13 cl, 4 dwg

FIELD: radio engineering, communication.

SUBSTANCE: in the device and the method, BS and MS share a table correlating a basic TF as a combination of parameters such as TB size used for transmitting only user data, an allocation RB quantity, a modulation method and an encoding ratio, with a derived TF having user data of different TB size by combining L1/L2 control information. Even when multiplexing L1/L2 control information, the index corresponding to the basic TF is reported from BS to MS.

EFFECT: high downlink and uplink throughput even when performing dynamic symbol allocation.

14 cl, 20 dwg

FIELD: radio engineering, communication.

SUBSTANCE: transmitter includes multiple transmitting antennae; a conversion unit configured to generate multiple signal sequences corresponding to a predefined frequency bandwidth from one or more transmission streams associated with any of the transmitting antennae; a precoding unit configured to set the weight the signal sequences using a precoding matrix selected from a code module including multiple predefined precoding matrices; and a transmitting unit configured to convert an output signal from the precoding unit into a number of signals corresponding to the number of transmitting antennae and transmit the converted signals from the transmitting antennae. The precoding unit applies different precoding matrices to different signal sequences, and the relationship between the different precoding matrices and the different signal sequences is determined through open-loop control which is independent of feedback from a receiver.

EFFECT: high capacity.

24 cl, 18 dwg

FIELD: physics, communications.

SUBSTANCE: invention relates to wireless communication. The base station is configured to communicate with a user terminal in a mobile communication system using a multiple input/multiple output (MIMO) scheme via precoding. The base station includes a receiving module which receives a precoding matrix index (PMI), which indicates a given precoding matrix, a determination module which determines the value of a flag indicator which indicates whether to use the precoding matrix given in the PMI for communication over a downlink, a control signal generating module which generates a downlink control signal which includes a flag indicator, and a transmitting module which transmits a signal, including a downlink control signal, over a downlink.

EFFECT: efficient utilisation of resources while simultaneously reducing the volume of downlink overhead.

18 cl, 11 dwg

FIELD: information technologies.

SUBSTANCE: in a device and a method BS and MS jointly use a table correlating the main TF as a combination of such parameters as a size of TB used only for user data transfer, quantity of RB for distribution, a method of modulation and a coding coefficient, with a TF derivative, having user data with other size of TB, by means of combining control information of L1/L2. Even during multiplexing of control information of L1/L2 an index complying with the main TF is communicated from BS to MS.

EFFECT: increased efficiency of a top-down communication link and a bottom-up communication link during dynamic distribution of symbols.

10 cl, 20 dwg

FIELD: information technology.

SUBSTANCE: disclosed invention relates to a transmitting apparatus, a receiving apparatus and a data transmitting method. To this end, measurement of communication quality using a broadband signal and transmitting and receiving data using a predetermined frequency band is carried out at approximately the same time. The transmitting apparatus (1) can transmit data at a first frequency and a second frequency to the receiving apparatus (2). The transmitter (1a) of the transmitting apparatus (1) transmits a predetermined broadband signal in a first period of time in a frequency band which does not include the first frequency, and in a second period of time in a frequency band which does not include the second frequency. The quality measuring unit (2a) of the receiving apparatus (2) measures quality of communication with the transmitting apparatus (1) based on the broadband signal received in the first and second period of time.

EFFECT: invention helps prevent quality deterioration when transmitting and receiving data.

14 cl, 21 dwg

FIELD: information technology.

SUBSTANCE: disclosed is a base station in which mobile stations are allocated either resource blocks obtained by dividing the system frequency band into blocks of successive subcarrier frequencies or distributed resource blocks consisting of subcarrier frequencies which are discretely distributed on the system frequency band, and obtained via segmentation of resource blocks into several resource blocks. The base station has a scheduling device configured to allocate resource blocks or distributed resource blocks for mobile stations with a predetermined allocation cycle based on the state of corresponding downlink channels transmitted from the mobile stations.

EFFECT: capacity to periodically allocate predetermined radio resources for traffic with periodic occurrence of data.

4 cl, 14 dwg

FIELD: engineering of systems for providing access to multimedia products for consumer through connections of digital client line xDSL.

SUBSTANCE: method includes usage of at least one multiplexer of access to digital client line DSLAM with permitted broadcasting, made for authentication of at least one user locally, and for permitting access to at least one channel in base network, while client information of each user is recorded in DSLAM, which maintains xDSL connection, leading to house of client and each DSLAM supports broadcasting protocols, request is received in DSLAM with permitting of broadcasting at least to one channel from client, where receiving DSLAM locally services xDSL connection for client, information stored in receiving DSLAM is used to determine whether access of client to channel being requested is sanctioned, and if client has sanctioned access to channel being requested, then DSLAM is used to provide such access.

EFFECT: increased speed of switching between channels of audio-visual information through xDSL connection with confirmation in access unit.

5 cl, 9 dwg

FIELD: methods for identification of changed in repeatedly broadcasted database.

SUBSTANCE: in accordance to the method data is produced in fragments, document is received which contains information about fragments, information is analyzed, and fragments are received repeatedly in accordance to aforementioned information.

EFFECT: possible listening of repeated broadcasting with minimal processing of data, detection of change of any data element and determining of location where the change is described.

4 cl, 2 dwg

FIELD: information technology.

SUBSTANCE: in a first scheme, a Hermitian matrix is iteratively derived based on a channel response matrix, and a matrix inversion is indirectly calculated by deriving the Hermitian matrix iteratively. The spatial filter matrix is derived based on the Hermitian matrix and the channel response matrix. In a second scheme, multiple rotations are performed to iteratively obtain first and second matrices for a pseudo-inverse matrix of the channel response matrix. The spatial filter matrix is derived based on the first and second matrices. In a third scheme, a matrix is formed based on the channel response matrix and decomposed to obtain a unitary matrix and a diagonal matrix. The spatial filter matrix is derived based on the unitary matrix, the diagonal matrix, and the channel response matrix.

EFFECT: efficient derivation of a spatial filter matrix.

24 cl, 4 dwg

FIELD: information technologies.

SUBSTANCE: transmitting device is equipped with facilities of radio communication resources provision, which provide radio communication resources to each physical channel according to the physical channel type; and transmission facilities, which transmit information to be sent by each physical channel, with application of proposed radio communication resources.

EFFECT: presence of optimal provision of radio communication resources to physical channels in the descending channel for transmission of various information types.

11 cl, 59 dwg

FIELD: information technology.

SUBSTANCE: disclosed is a base station in which mobile stations are allocated either resource blocks obtained by dividing the system frequency band into blocks of successive subcarrier frequencies or distributed resource blocks consisting of subcarrier frequencies which are discretely distributed on the system frequency band, and obtained via segmentation of resource blocks into several resource blocks. The base station has a scheduling device configured to allocate resource blocks or distributed resource blocks for mobile stations with a predetermined allocation cycle based on the state of corresponding downlink channels transmitted from the mobile stations.

EFFECT: capacity to periodically allocate predetermined radio resources for traffic with periodic occurrence of data.

4 cl, 14 dwg

FIELD: information technology.

SUBSTANCE: disclosed invention relates to a transmitting apparatus, a receiving apparatus and a data transmitting method. To this end, measurement of communication quality using a broadband signal and transmitting and receiving data using a predetermined frequency band is carried out at approximately the same time. The transmitting apparatus (1) can transmit data at a first frequency and a second frequency to the receiving apparatus (2). The transmitter (1a) of the transmitting apparatus (1) transmits a predetermined broadband signal in a first period of time in a frequency band which does not include the first frequency, and in a second period of time in a frequency band which does not include the second frequency. The quality measuring unit (2a) of the receiving apparatus (2) measures quality of communication with the transmitting apparatus (1) based on the broadband signal received in the first and second period of time.

EFFECT: invention helps prevent quality deterioration when transmitting and receiving data.

14 cl, 21 dwg

FIELD: information technologies.

SUBSTANCE: in a device and a method BS and MS jointly use a table correlating the main TF as a combination of such parameters as a size of TB used only for user data transfer, quantity of RB for distribution, a method of modulation and a coding coefficient, with a TF derivative, having user data with other size of TB, by means of combining control information of L1/L2. Even during multiplexing of control information of L1/L2 an index complying with the main TF is communicated from BS to MS.

EFFECT: increased efficiency of a top-down communication link and a bottom-up communication link during dynamic distribution of symbols.

10 cl, 20 dwg

FIELD: physics, communications.

SUBSTANCE: invention relates to wireless communication. The base station is configured to communicate with a user terminal in a mobile communication system using a multiple input/multiple output (MIMO) scheme via precoding. The base station includes a receiving module which receives a precoding matrix index (PMI), which indicates a given precoding matrix, a determination module which determines the value of a flag indicator which indicates whether to use the precoding matrix given in the PMI for communication over a downlink, a control signal generating module which generates a downlink control signal which includes a flag indicator, and a transmitting module which transmits a signal, including a downlink control signal, over a downlink.

EFFECT: efficient utilisation of resources while simultaneously reducing the volume of downlink overhead.

18 cl, 11 dwg

FIELD: radio engineering, communication.

SUBSTANCE: transmitter includes multiple transmitting antennae; a conversion unit configured to generate multiple signal sequences corresponding to a predefined frequency bandwidth from one or more transmission streams associated with any of the transmitting antennae; a precoding unit configured to set the weight the signal sequences using a precoding matrix selected from a code module including multiple predefined precoding matrices; and a transmitting unit configured to convert an output signal from the precoding unit into a number of signals corresponding to the number of transmitting antennae and transmit the converted signals from the transmitting antennae. The precoding unit applies different precoding matrices to different signal sequences, and the relationship between the different precoding matrices and the different signal sequences is determined through open-loop control which is independent of feedback from a receiver.

EFFECT: high capacity.

24 cl, 18 dwg

FIELD: radio engineering, communication.

SUBSTANCE: in the device and the method, BS and MS share a table correlating a basic TF as a combination of parameters such as TB size used for transmitting only user data, an allocation RB quantity, a modulation method and an encoding ratio, with a derived TF having user data of different TB size by combining L1/L2 control information. Even when multiplexing L1/L2 control information, the index corresponding to the basic TF is reported from BS to MS.

EFFECT: high downlink and uplink throughput even when performing dynamic symbol allocation.

14 cl, 20 dwg

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