公开(公告)号：AU2014215957A1

公开(公告)日：2014-09-11

申请号：AU2014215957

申请日：2014-08-20

Applicant: QUALCOMM INC

Inventor： SHI KAI ,  ZHANG NING

IPC: H03M13/00

Abstract: A system and method for transmitting LDPC parameters is provided. In the method, an initial number of OFDM 0 symbols (Nsym init) is determined for a packet that is based on the number of information bits to be delivered in the packet. An STBC value is also determined. A number of extra symbols (Nsymext) value is generated based on the Nsyminit value, wherein a Nsym value is based on said Nsym init value and said Nsymext value. An Nldpc ext value is determined based on the STBC value and the Nsym_ext value for purposes of determining LDPC parameters associated with the packet IF - 110

公开(公告)号：AU2011301908A1

公开(公告)日：2013-03-21

申请号：AU2011301908

申请日：2011-09-16

Applicant: QUALCOMM INC

Inventor： SHI KAI ,  ZHANG NING

IPC: H03M13/00

Abstract: A system and method for transmitting LDPC parameters is provided. In the method, an initial number of OFDM symbols (Nsym_init) is determined for a packet that is based on the number of information bits to be delivered in the packet. An STBC value is also determined. A number of extra symbols (Nsym_ext) value is generated based on the Nsym_init value, wherein a Nsym value is based on said Nsym_init value and said Nsym_ext value. An Nldpc_ext value is determined based on the STBC value and the Nsym_ext value for purposes of determining LDPC parameters associated with the packet.

公开(公告)号：CA2810533A1

公开(公告)日：2012-03-22

申请号：CA2810533

申请日：2011-09-16

Applicant: QUALCOMM INC

Inventor： SHI KAI ,  ZHANG NING

IPC: H03M13/00

Abstract: A system and method for transmitting LDPC parameters is provided. In the method, an initial number of OFDM symbols (Nsym_init) is determined for a packet that is based on the number of information bits to be delivered in the packet. An STBC value is also determined. A number of extra symbols (Nsym_ext) value is generated based on the Nsym_init value, wherein a Nsym value is based on said Nsym_init value and said Nsym_ext value. An Nldpc_ext value is determined based on the STBC value and the Nsym_ext value for purposes of determining LDPC parameters associated with the packet.

公开(公告)号：WO2013074424A4

公开(公告)日：2013-07-11

申请号：PCT/US2012064524

申请日：2012-11-09

Applicant: QUALCOMM INC

Inventor： CHEN QIFAN ,  SHI KAI ,  ZHANG NING

IPC: H04W64/00 ,  G01S5/02 ,  H04J3/06

CPC classification number: H04W24/08 ,  G01S7/40 ,  G01S13/765 ,  H04J3/0667

Abstract: A method and apparatus for improving the accuracy of a round trip time (RTT) estimate between a first device and a second device are disclosed. The method involves calculating an acknowledgement correction factor and a unicast correction factor. These correction factors are used to compensate for symbol boundary time errors resulting from multipath effects.

Abstract translation: 公开了一种用于提高第一设备和第二设备之间的往返时间（RTT）估计精度的方法和设备。 该方法涉及计算确认校正因子和单播校正因子。 这些校正因子用于补偿由多径效应引起的符号边界时间误差。

公开(公告)号：EP2609710A4

公开(公告)日：2017-07-05

申请号：EP11820744

申请日：2011-08-26

Applicant: QUALCOMM INC

Inventor： SHI KAI ,  ZHANG NING

IPC: H04L25/02 ,  H04B7/04 ,  H04L5/00 ,  H04L27/26

CPC classification number: H04L27/2695 ,  H04B7/0413 ,  H04B7/0421 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/023 ,  H04L27/2657 ,  H04L27/2672 ,  H04L27/2675

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.

Abstract translation: 在MIMO中，无线节点的接收链解调功能被增强以包括使用嵌入在帧前导码中的非常高吞吐量的长训练字段（VHT-LTF）的相位跟踪。 在传输VHT-LTF期间添加单流导频音。 接收机使用第一组VHT-LTF中的导频音来估计信道，并且使用第二组VHT-LTF来估计导频音的相位。 相位估计接收机使用第一组VHT-LTF中的导频音来估计信道。 相位估计连续地应用于整个数据符号的VHT-LTF中的其他接收数据音调。 由于PLL失配和相位噪声导致的相位误差在接收时降低，从而针对不同的漂移和频率偏移水平产生更好的信噪比。

公开(公告)号：EP2617146A4

公开(公告)日：2017-01-25

申请号：EP11826023

申请日：2011-09-16

Applicant: QUALCOMM INC

Inventor： KIM YOUHAN ,  CHO JAMES ,  SHI KAI ,  ZHANG NING

IPC: H04W72/04 ,  H04W84/12

CPC classification number: H04W72/0453 ,  H04L1/0643 ,  H04L5/0023 ,  H04L5/0044 ,  H04L5/0053

Abstract: A first combination of frequency bands is selected for transmitting a first data packet, and a second, different combination of frequency bands is selected for transmitting a second data packet. A data stream is divided into a first set of data and a second set of data. The first set of data is allocated to the first combination of frequency bands, and the second set of data is allocated to the second combination of frequency bands.

Abstract translation: 选择频带的第一组合用于发送第一数据分组，并且选择频带的第二不同组合来发送第二数据分组。 数据流被分成第一组数据和第二组数据。 第一组数据被分配给频带的第一组合，并且第二组数据被分配给频带的第二组合。

公开(公告)号：EP2617136A4

公开(公告)日：2014-04-23

申请号：EP11826020

申请日：2011-09-16

Applicant: QUALCOMM INC

Inventor： SHI KAI ,  ZHANG NING

IPC: H04L1/00

CPC classification number: H04L1/0057 ,  H04L1/0065 ,  H04L1/0067 ,  H04L1/0625 ,  H04L1/0643 ,  H04L27/2601