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    SINGLE STREAM PHASE TRACKING DURING CHANNEL ESTIMATION IN A VERY HIGH THROUGHPUT WIRELESS MIMO COMMUNICATION SYSTEM
    31.
    发明专利
    SINGLE STREAM PHASE TRACKING DURING CHANNEL ESTIMATION IN A VERY HIGH THROUGHPUT WIRELESS MIMO COMMUNICATION SYSTEM 未知

    公开(公告)号：CA2807383A1

    公开(公告)日：2012-03-01

    申请号：CA2807383

    申请日：2011-08-26

    Applicant: QUALCOMM INC

    Inventor： SHI KAI ,  ZHANG NING

    IPC: H04L7/00

    Abstract: In a multiple-input, multiple-output system, the wireless node's receive chain demodulation function is enhanced to include phase tracking. Instead of performing phase tracking during the data symbols which is cumbersome for very high throughput wireless networks, the VHT Long Training Fields (LTFs) embedded in the preamble of a frame are used for phase tracking. Single stream pilot tones are added during the transmission of VHT- LTFs. This is exploited on the receive side to be able to estimate the channel using the pilot tones in the first set of the Long Training Fields. Second set of the Long Training Fields are then used to estimate the phase of the pilot tones using the estimated channel. The phase estimation so obtained is continuously applied to other received data tones throughout the VHT-LTFs of the data symbols. The phase errors due to PLL mismatches and phase noise are reduced at reception, leading to better signal to noise ratio for different levels of parts per million drift and offset in frequency. Further, MIMO channel estimation is more accurate, which improves the overall wireless network when this accurate MIMO channel estimation data participates in calibration and handshake between wireless nodes.

    Activador de ahorro de energía
    32.
    发明专利
    Activador de ahorro de energía 未知

    公开(公告)号：ES2750811T3

    公开(公告)日：2020-03-27

    申请号：ES16726236

    申请日：2016-05-12

    Applicant: QUALCOMM INC

    Inventor： JIA ZHANFENG ,  CHO JAMES ,  KUMAR SUMEET ,  HOMCHAUDHURI SANDIP ,  O'DONNELL IAN ,  ZHANG NING ,  RAISSINIA ALIREZA

    IPC: H04W52/02 ,  H04W72/12

    Abstract: Un procedimiento para que un primer dispositivo inalámbrico reciba datos de enlace descendente, DL, en cola, (540(1), 540(2), 540(3)) de un segundo dispositivo inalámbrico, con el procedimiento realizado por el primer dispositivo inalámbrico y que comprende: recibir (801), desde el segundo dispositivo inalámbrico, una trama de baliza (510) que indica la presencia de una pluralidad de conjuntos de datos de DL en cola (540(1), 540(2), 540(3)), cada uno para su entrega simultánea a uno correspondiente de una pluralidad de dispositivos inalámbricos, en el que la pluralidad de dispositivos inalámbricos incluye el primer dispositivo inalámbrico, y en el que la trama de baliza (510) indica que el primer dispositivo inalámbrico debe transmitir una petición (530(1), 530(2)) para la entrega de los datos de DL en cola (540(1), 540(2), 540(3)) al recibir el permiso (520) del segundo dispositivo inalámbrico; recibir (802), del segundo dispositivo inalámbrico, permiso (520) para solicitar la entrega de los datos de DL en cola (540(1), 540(2), 540(3)); transmitir (803), al segundo dispositivo inalámbrico, la petición (530(1), 530(2)) para la entrega de los datos de DL en cola (540(1), 540(2), 540(3)) basándose en el permiso (520); y recibir (804), del segundo dispositivo inalámbrico, el conjunto de datos de DL en cola (540(1), 540(2), 20 540(3)) correspondientes al primer dispositivo inalámbrico.

    Mecanismo de ahorro de energía en una red WLAN con gran número de estaciones
    34.
    发明专利
    Mecanismo de ahorro de energía en una red WLAN con gran número de estaciones 未知

    公开(公告)号：ES2719711T3

    公开(公告)日：2019-07-12

    申请号：ES16760289

    申请日：2016-08-25

    Applicant: QUALCOMM INC

    Inventor： JIA ZHANFENG ,  RAISSINIA ALIREZA ,  ASTERJADHI ALFRED ,  CHO JAMES ,  HOMCHAUDHURI SANDIP ,  KUMAR SUMEET ,  MERLIN SIMONE ,  ZHANG NING ,  RANGANATH ASHOK ,  O'DONNELL IAN ,  YOUNG JASON ,  SAMPATHKUMAR BADRISRINIVASAN

    IPC: H04W52/02

    Abstract: Un procedimiento para la comunicación inalámbrica, que comprende: proporcionar una indicación de una duración de suspensión a un nodo inalámbrico (110), donde proporcionar la indicación de la duración de suspensión para su transmisión al nodo inalámbrico (110) comprende además: generar una trama de señal de tiempo de activación objetivo, TWT, (305) durante una ranura de tiempo de un TWT (210); y proporcionar la trama de señal de TWT (305) para su transmisión; en el que la trama de señal de TWT (305) comprende una lista de servicios que identifica al menos un nodo inalámbrico que debe recibir servicio durante al menos una de las ranuras de tiempo del TWT (210) o la duración de suspensión; comunicarse con el nodo inalámbrico durante el TWT (210), donde la comunicación comprende al menos uno de proporcionar datos para su transmisión al nodo inalámbrico (110) u obtener datos recibidos desde el nodo inalámbrico (110); y abstenerse de proporcionar datos para su transmisión al nodo inalámbrico (110) durante al menos la duración de suspensión indicada basándose en, al menos en parte, la temporización de la comunicación.

    SINGLE STREAM PHASE TRACKING DURING CHANNEL ESTIMATION IN A VERY HIGH THROUGHPUT WIRELESS MIMO COMMUNICATION SYSTEM
    36.
    发明专利
    SINGLE STREAM PHASE TRACKING DURING CHANNEL ESTIMATION IN A VERY HIGH THROUGHPUT WIRELESS MIMO COMMUNICATION SYSTEM 未知

    公开(公告)号：AU2016203514A1

    公开(公告)日：2016-06-16

    申请号：AU2016203514

    申请日：2016-05-27

    Applicant: QUALCOMM INC

    Inventor： SHI KAI ,  ZHANG NING

    IPC: H04L7/00

    Abstract: In a multiple-input, multiple-output system, the wireless node's receive chain demodulation function is enhanced to include phase tracking. Instead of performing phase tracking during the data symbols which is cumbersome for very high throughput wireless networks, the VHT Long Training Fields (LTFs) embedded in the preamble of a frame are used for phase tracking. Single stream pilot tones are added during the transmission of VHT- LTFs. This is exploited on the receive side to be able to estimate the channel using the pilot tones in the first set of the Long Training Fields. Second set of the Long Training Fields are then used to estimate the phase of the pilot tones using the estimated channel. The phase estimation so obtained is continuously applied to other received data tones throughout the VHT-LTFs of the data symbols. The phase errors due to PLL mismatches and phase noise are reduced at reception, leading to better signal to noise ratio for different levels of parts per million drift and offset in frequency. Further, MIMO channel estimation is more accurate, which improves the overall wireless network when this accurate MIMO channel estimation data participates in calibration and handshake between wireless nodes.

    SINGLE STREAM PHASE TRACKING DURING CHANNEL ESTIMATION IN A VERY HIGH THROUGHPUT WIRELESS MIMO COMMUNICATION SYSTEM
    37.
    发明专利
    SINGLE STREAM PHASE TRACKING DURING CHANNEL ESTIMATION IN A VERY HIGH THROUGHPUT WIRELESS MIMO COMMUNICATION SYSTEM 未知

    公开(公告)号：SG10201504527PA

    公开(公告)日：2015-07-30

    申请号：SG10201504527P

    申请日：2011-08-26

    Applicant: QUALCOMM INC

    Inventor： SHI KAI ,  ZHANG NING

    Abstract: In a multiple-input, multiple-output (MIMO) system, a wireless node's receive chain demodulation function is enhanced to include phase tracking. VHT Long Training Fields (LTFs) embedded in a frame preamble are used for phase tracking. Single stream pilot tones are added during transmission of VHT-LTFs. A receiver estimates the channel using the pilot tones in a first set of LTFs. A second set of LTFs are used to estimate the phase of the pilot tones using the estimated channel. The phase estimation is continuously applied to other received data tones throughout the VHT-LTFs of data symbols. Phase errors due to PLL mismatches and phase noise are reduced at reception, leading to better signal to noise ratio for different levels of drift and frequency offset. Further, MIMO channel estimation is more accurate, improving the overall wireless network when the accurate MIMO channel estimation data participates in calibration and handshake between wireless nodes.

    Single stream phase tracking during channel estimation in a very high throughput wireless MIMO communication system
    38.
    发明专利
    Single stream phase tracking during channel estimation in a very high throughput wireless MIMO communication system 未知

    公开(公告)号：AU2011293191B2

    公开(公告)日：2015-03-26

    申请号：AU2011293191

    申请日：2011-08-26

    Applicant: QUALCOMM INC

    Inventor： SHI KAI ,  ZHANG NING

    IPC: H04L7/00

    Abstract: In a multiple-input, multiple-output system, the wireless node's receive chain demodulation function is enhanced to include phase tracking. Instead of performing phase tracking during the data symbols which is cumbersome for very high throughput wireless networks, the VHT Long Training Fields (LTFs) embedded in the preamble of a frame are used for phase tracking. Single stream pilot tones are added during the transmission of VHT- LTFs. This is exploited on the receive side to be able to estimate the channel using the pilot tones in the first set of the Long Training Fields. Second set of the Long Training Fields are then used to estimate the phase of the pilot tones using the estimated channel. The phase estimation so obtained is continuously applied to other received data tones throughout the VHT-LTFs of the data symbols. The phase errors due to PLL mismatches and phase noise are reduced at reception, leading to better signal to noise ratio for different levels of parts per million drift and offset in frequency. Further, MIMO channel estimation is more accurate, which improves the overall wireless network when this accurate MIMO channel estimation data participates in calibration and handshake between wireless nodes.

    СИСТЕМА И СПОСОБ ДЛЯ ПЕРЕДАЧИ СИГНАЛА С НИЗКОЙ ПЛОТНОСТЬЮ КОНТРОЛЯ ЧЕТНОСТИ
    40.
    发明专利
    СИСТЕМА И СПОСОБ ДЛЯ ПЕРЕДАЧИ СИГНАЛА С НИЗКОЙ ПЛОТНОСТЬЮ КОНТРОЛЯ ЧЕТНОСТИ 未知

    公开(公告)号：UA106311C2

    公开(公告)日：2014-08-11

    申请号：UAA201304508

    申请日：2011-09-16

    Applicant: QUALCOMM INC

    Inventor： SHI KAI ,  ZHANG NING

    IPC: H03M13/00

    Abstract: Представленысистемаи способдляпередачи LDPC-параметров. Способзаключаетсяв том, чтодляпакетаопределяетсяисходноечисло OFDM-символов (Nsym_init), основанноеначислеинформационныхбитов, которыедолжныдоставлятьсяв пакете. Такжеопределяется STBC-значение. Значениечисладополнительныхсимволов (Nsym_ext) формируетсянаосновезначения Nsym_init, приэтомзначение Nsym основанонаупомянутомзначении Nsym_init иупомянутомзначении Nsym_ext. Значение Nldpc_ext определяетсянаоснове STBC-значенияи значения Nsym_ext сцельюопределения LDPC-параметров, ассоциированныхс пакетом.

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