NETWORK-CENTRIC LINK ADAPTATION FOR COORDINATED MULTIPOINT DOWNLINK TRANSMISSION

    公开(公告)号:CA2764229A1

    公开(公告)日:2010-12-16

    申请号:CA2764229

    申请日:2010-06-09

    Abstract: A Coordinated Multipoint (COMP) cell controller performs network-centric Sink adaptation for User Equipment (UE) in the CoMP cell. The CoMP cell controller receives at least infrequent channel estimates from a UE in the CoMP cell, from which it estimates downlink channel and thermal noise at the UE. The CoMP cell controller is aware of the desired signal to be received at the UE, and the intra-CoMP cell interference to the UE caused by transmissions to other UEs in the CoMP cell. The CoMP cell receives from the UE reports of inter-CoMP cell interference caused by transmissions by other CoMP cells. Based on the downlink channel quality, the desired signal, the intra-CoMP cell interference, the intex-CoMP cell interference, and the thermal noise, the CoMP cell controller performs link adaptation by selecting modulation and coding schemes, and other transmission parameters, for mi upcoming transmission duration (such as a TTI).

    BLIND FREQUENCY-OFFSET ESTIMATION FOR TEMPORALLY AND/OR SPATIALLY CORRELATED SIGNAL

    公开(公告)号:CA2742606A1

    公开(公告)日:2010-05-27

    申请号:CA2742606

    申请日:2009-11-20

    Inventor: HUI DENNIS

    Abstract: An iterative, blind, frequency-offset estimation process that does not require any training signal or demodulated information symbols is disclosed. Receivers embodying the disclosed processes can produce periodic frequency-offset estimates, without running computationally intensive equalization or demodulation algorithms, by exploiting the temporal correlation of the received signal in the time domain, as well as the received signal's correlation across in-phase and quadrature dimensions, in some embodiments, to find a frequency-offset estimate that best fits the received signal in a maximum-likelihood sense. In an exemplary method of estimating receiver frequency offset, a temporally stacked signal block is formed from multi-branch signal samples corresponding to each of two or more time-separated samples of the received signal. The temporally stacked signal block is used in computing a maximum-likelihood joint estimate of the receiver frequency offset and the spatial covariance of the temporally stacked signal block de-rotated by the receiver frequency offset.

    93.
    发明专利
    未知

    公开(公告)号:DE60117052D1

    公开(公告)日:2006-04-13

    申请号:DE60117052

    申请日:2001-11-05

    Abstract: A method and apparatus for offsetting the frequency of a local oscillator in a receiver are disclosed. The local oscillator frequency is offset with an offset frequency that depends on the training sequence used. Training symbols are inputted to the control unit. The control unit then provides an offset frequency depending on the training symbol received. A rotation of the baseband signal, proportional to the offset frequency, is introduced which later is digitally compensated for. Upon reception of the signal, a DC offset is introduced in the radio part. The digital compensation transforms this DC offset, in the baseband signal, to a rotating signal. The rotating DC offset signal is then subtracted in the baseband processing.

    Joint dc offset and channel estimation by using a least squares (ls) algorithm

    公开(公告)号:AU1907402A

    公开(公告)日:2002-05-21

    申请号:AU1907402

    申请日:2001-11-05

    Abstract: A method and apparatus for offsetting the frequency of a local oscillator in a receiver are disclosed. The local oscillator frequency is offset with an offset frequency that depends on the training sequence used. Training symbols are inputted to the control unit. The control unit then provides an offset frequency depending on the training symbol received. A rotation of the baseband signal, proportional to the offset frequency, is introduced which later is digitally compensated for. Upon reception of the signal, a DC offset is introduced in the radio part. The digital compensation transforms this DC offset, in the baseband signal, to a rotating signal. The rotating DC offset signal is then subtracted in the baseband processing.

    Codificación polar para un canal de difusión de barrido de haz

    公开(公告)号:ES2924902T3

    公开(公告)日:2022-10-11

    申请号:ES18723787

    申请日:2018-05-04

    Abstract: De acuerdo con algunas realizaciones, un método en un transmisor inalámbrico comprende: obtener un primer conjunto de bits (que comprende un componente que no varía con el tiempo) para la transmisión inalámbrica; concatenar un segundo conjunto de bits (que comprende un componente variable en el tiempo (por ejemplo, un identificador de haz)) con el primer conjunto de bits; codificar el primer y segundo conjunto de bits concatenados usando un código de canal; y transmitir los bits codificados a un receptor inalámbrico. En algunas realizaciones, transmitir los bits codificados al receptor inalámbrico comprende transmitir un primer haz. El método puede comprender además: concatenar un tercer conjunto de bits (que comprende un componente variable en el tiempo (por ejemplo, un identificador de haz)) con el primer conjunto de bits inalámbricos; codificar el primer y tercer conjunto de bits concatenados usando un código de canal; y transmitir los bits codificados a un receptor inalámbrico utilizando un segundo haz. (Traducción automática con Google Translate, sin valor legal)

    CONCATENATED POLAR CODE WITH ADAPTIVE ERROR DETECTION

    公开(公告)号:CA3050076C

    公开(公告)日:2022-08-30

    申请号:CA3050076

    申请日:2018-02-06

    Abstract: According to certain embodiments, a method by a transmitter is provided for adaptively generating precoder bits for a Polar code. The method includes acquiring at least one configuration parameter upon which a total number of precoder bits depends. The at least one configuration parameter comprising at least one of an information block length K,a code block length N, and/or a code rate R=K/ N. The total number of precoder bits is determined, and the precoder bits for a code block are generated according to the determined total number of precoder bits. The precoder bits are placed within the code block.

    Código Polar concatenado con detección de errores adaptativa

    公开(公告)号:ES2917025T3

    公开(公告)日:2022-07-06

    申请号:ES18708205

    申请日:2018-02-06

    Abstract: Según ciertas realizaciones, se proporciona un método de un transmisor para generar bits precodificadores de forma adaptativa para un código polar. El método incluye adquirir al menos un parámetro de configuración sobre el cual depende un número total de bits precodificadores. El al menos un parámetro de configuración que comprende al menos uno de una longitud de bloque de información k, una longitud de bloque de código n y/ o una tasa de código r = k/ N. se determina el número total de bits precoderadores, y los bits de precodificadores para un El bloque de código se genera de acuerdo con el número total determinado de bits precodificadores. Los bits precoderadores se colocan dentro del bloque de código. (Traducción automática con Google Translate, sin valor legal)

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