Tone plan for LTF compression and transmission in wireless communication systems

    公开(公告)号:AU2015311928A1

    公开(公告)日:2017-02-23

    申请号:AU2015311928

    申请日:2015-09-03

    Applicant: QUALCOMM INC

    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. In one aspect, an apparatus is configured to transmit user data in a first symbol of a first symbol type. The first symbol type has a first symbol duration, a first frequency bandwidth, and a first tone plan. The first tone plan includes a first valid start tone index, a first valid end tone index, and a first set of DC tones. The apparatus is further configured to transmit an LTF in a second symbol of a second symbol type. The second symbol type has a second symbol duration, a second frequency bandwidth, and a second tone plan. The second tone plan includes a second valid start tone index, a second valid end tone index, and a second set of DC tones.

    APPARATUS AND METHOD FOR APPLYING SPECIAL SPECTRAL MASKS FOR TRANSMISSION SUB GIGAHERTZ BANDS

    公开(公告)号:CA2869186A1

    公开(公告)日:2013-11-14

    申请号:CA2869186

    申请日:2013-05-07

    Applicant: QUALCOMM INC

    Abstract: Systems, methods, and devices for wireless communication are provided. In one aspect, an apparatus for wireless communication is provided. The apparatus includes a processor configured to generate a packet for transmission via a wireless signal. The packet is generated for transmission over a bandwidth of 1 MHz using at least one orthogonal frequency-division multiplexing (OFDM) symbol. The apparatus further includes a transmitter configured to transmit the packet via the wireless signal having a power spectral density. The power spectral density within ±0.45 MHz of a center frequency of the wireless signal is at a first power spectral density level. The power spectral density between 0.45 MHz and 0.6 MHz from the center frequency of the wireless signal and between -0.45 MHz and -0.6 MHz from the center frequency of the wireless signal is less than the first power spectral density level. The power spectral density between 0.6 MHz and 1 MHz from the center frequency of the wireless signal and between -0.6 MHz and -1 MHz from the center frequency of the wireless signal is less than -20 dBr with respect to the first power spectral density level. The power spectral density between 1 MHz and 1.5 MHz from the center frequency of the wireless signal and between -1 MHz and -1.5 MHz from the center frequency of the wireless signal is less than -28 dBr with respect to the first power spectral density level. The power spectral density of greater than ±1.5 MHz from the center frequency of the wireless signal is less than -40 dBr with respect to the first power spectral density level.

    Retardo de desplazamiento cíclico por flujo y por antena en MIMO multiusuario de enlace ascendente

    公开(公告)号:ES2871031T3

    公开(公告)日:2021-10-28

    申请号:ES15787737

    申请日:2015-10-01

    Applicant: QUALCOMM INC

    Abstract: Un procedimiento de comunicación inalámbrica para una estación, que comprende: determinar (605) un primer conjunto de valores de retardo de desplazamiento cíclico, CSD, para transmitir un primer conjunto de información en una pluralidad de antenas, en el que el primer conjunto de información es un preámbulo heredado (270), en el que los valores de CSD del primer conjunto difieren entre antenas, en el que dicha determinación (605) comprende: determinar un valor de CSD de antena para cada antena de la pluralidad de antenas, recibir un desfase de CSD de usuario a través de un mensaje de activación (216) desde un punto de acceso, y modificar el valor de CSD de antena para cada antena de la pluralidad de antenas basándose en el desfase de CSD de usuario; determinar (610) un segundo conjunto de valores de CSD para transmitir un segundo conjunto de información sobre la pluralidad de antenas, en el que el segundo conjunto de información es un preámbulo no heredado (280) y símbolos de datos (298), en el que los valores de CSD del segundo conjunto difieren entre flujos; y transmitir (620) el primer conjunto de información basándose en el primer conjunto de valores de CSD y el segundo conjunto de información basándose en el segundo conjunto de valores de CSD.

Patent Agency Ranking