公开(公告)号：CO2019008498A2

公开(公告)日：2019-08-20

申请号：CO2019008498

申请日：2019-08-02

Applicant: QUALCOMM INC

Inventor： SORIAGA JOSEPH BINAMIRA ,  SARKIS GABI ,  KUDEKAR SHRINIVAS ,  RICHARDSON THOMAS ,  LONCKE VINCENT

IPC: H03M13/03 ,  H03M13/00 ,  H03M13/11

Abstract: RESUMEN Los aspectos de la presente divulgación se refieren la codificación del control de paridad de baja densidad (LDPC) mediante el uso de gráficos base de LDPC. Dos o más gráficos base de LDPC pueden mantenerse, lo cuales están asociados con diferentes rangos de longitudes de bloque de información de superposición. Un gráfico base de LDPC particular se puede seleccionar para un bloque de información en función de la longitud de bloque de información del bloque de información. Las métricas adicionales que se pueden considerar cuando se selecciona el gráfico base de LDPC pueden incluir la tasa de código utilizada para codificar el bloque de información y/o el tamaño de elevación aplicado a cada gráfico base de LDPC para producir la longitud de bloque de información del bloque de información.

公开(公告)号：AU2018214491A1

公开(公告)日：2019-07-18

申请号：AU2018214491

申请日：2018-01-19

Applicant: QUALCOMM INC

Inventor： SORIAGA JOSEPH BINAMIRA ,  SARKIS GABI ,  KUDEKAR SHRINIVAS ,  RICHARDSON THOMAS ,  LONCKE VINCENT

IPC: H03M13/03 ,  H03M13/00 ,  H03M13/11

Abstract: Aspects of the present disclosure relate to low density parity check (LDPC) coding utilizing LDPC base graphs. Two or more LDPC base graphs may be maintained that are associated with different ranges of overlapping information block lengths. A particular LDPC base graph may be selected for an information block based on the information block length of the information block. Additional metrics that may be considered when selecting the LDPC base graph may include the code rate utilized to encode the information block and/or the lift size applied to each LDPC base graph to produce the information block length of the information block.

公开(公告)号：AU2017333145A1

公开(公告)日：2019-03-07

申请号：AU2017333145

申请日：2017-07-11

Applicant: QUALCOMM INC

Inventor： KUDEKAR SHRINIVAS ,  RICHARDSON THOMAS ,  SORIAGA JOSEPH BINAMIRA ,  XU CHANGLONG

IPC: H04L1/18

Abstract: Various aspects of the disclosure relate to encoding information and decoding information. In some aspects, the disclosure relates to an encoder and a decoder for Polar codes with HARQ. If a first transmission of the encoder fails, information bits associated with a lower quality channel may be retransmitted. At the decoder, the resulting decoded retransmitted bits may be used to decode the first transmission by substituting the retransmitted bits for the original corresponding (low quality channel) bits. In some aspects, to decode the first transmission, soft-combining is applied to the decoded retransmitted bits and the original corresponding (low quality channel) bits. In some aspects, CRC bits for a first transmission may be split between a first subset of bits and a second subset of bits. In this case, the second subset of bits and the associated CRC bits may be used for a second transmission (e.g., a retransmission).

公开(公告)号：CA3061475A1

公开(公告)日：2018-12-13

申请号：CA3061475

申请日：2018-06-08

Applicant: QUALCOMM INC

Inventor： RICHARDSON THOMAS ,  SORIAGA JOSEPH BINAMIRA ,  KUDEKAR SHRINIVAS ,  SARKIS GABI

IPC: H03M13/11

Abstract: Certain aspects of the present disclosure provide quasi-cyclic low-density parity-check (QC-LDPC) codes having pair-wise orthogonality of adjacent rows of the corresponding base matrices, and a new decoder (e.g. layered decoder) that exploits the pairwise row orthogonality for flexible decoder scheduling without performance loss, for example by decoding sequentially row by row in the base matrix or by decoding the pairs of orthogonal rows in the base matrix at a time. An apparatus includes a receiver configured to receive a codeword in accordance with a radio technology across a wireless channel via one or more antenna elements situated proximal the receiver. The apparatus includes at least one processor coupled with a memory and comprising decoder circuitry configured to decode the codeword based on a QC-LDPC code to produce a set of information bits. The LDPC code is stored in the memory and defined by a base matrix having columns in which all adjacent rows are orthogonal in a last portion of the rows.

公开(公告)号：HUE036741T2

公开(公告)日：2018-07-30

申请号：HUE10176878

申请日：2007-01-10

Applicant: QUALCOMM INC

Inventor： LAROIA RAJIV ,  LANE FRANK A ,  LI JUNYI ,  RICHARDSON THOMAS

IPC: H04W8/00 ,  H04W36/16 ,  H04W36/24 ,  H04W48/08 ,  H04W52/04 ,  H04W72/02 ,  H04W72/06 ,  H04W74/00 ,  H04W74/08 ,  H04W76/04 ,  H04W84/04 ,  H04W84/18 ,  H04W88/04 ,  H04W88/06

公开(公告)号：AU2012200779B2

公开(公告)日：2014-02-20

申请号：AU2012200779

申请日：2012-02-10

Applicant: QUALCOMM INC

Inventor： PARIZHSKY VLADIMIR ,  RICHARDSON THOMAS

IPC: H04B7/04

Abstract: Methods and apparatus for improved utilization of air link resources are discussed in wireless communications systems employing multi-sector base stations and wireless terminals with multiple antennas. Timing synchronization is maintained across the base station sectors, and the same set of tones are used in adjacent sectors. In a sector boundary region, which is typically a high interference region, a wireless terminal is set to a sector pair state and operated in a MIMO mode of operation, communicating with two adjacent base station antenna faces of the same base station concurrently, the two different adjacent base station antenna faces corresponding to different adjacent sectors. Thus, typically high interference sector boundary regions, are converted into high capacity regions by having the sectors coordinated and utilizing MIMO techniques. (00 U-) C4r N 101 I)0O z ci i 0N z

公开(公告)号：BRPI0806757A2

公开(公告)日：2011-09-13

申请号：BRPI0806757

申请日：2008-01-24

Applicant: QUALCOMM INC

Inventor： KHANDEKAR AAMOD ,  RICHARDSON THOMAS

IPC: H03M13/11

Abstract: Techniques to support low density parity check (LDPC) encoding and decoding are described. In an aspect, LDPC encoding and decoding of packets of varying sizes may be supported with a set of base parity check matrices of different dimensions and a set of lifting values of different powers of two. A base parity check matrix G of dimension m B ( En B ) may be used to encode a packet of k B =n B -m B information bits to obtain a codeword of n B code bits. This base parity check matrix may be "lifted" by a lifting value of L to obtain a lifted parity check matrix H of dimension Lm B ( ELn B ) . The lifted parity check matrix may be used to encode a packet of up to Lk B information bits to obtain a codeword of Ln B code bits. A wide range of packet sizes may be supported with the set of base parity check matrices and the set of lifting values.

公开(公告)号：BRPI0709942A2

公开(公告)日：2011-08-02

申请号：BRPI0709942

申请日：2007-04-14

Applicant: QUALCOMM INC

Inventor： PARIZHSKY VLADIMIR ,  LAROIA RAJIV ,  LEONIDOV ALEXANDER ,  RICHARDSON THOMAS ,  LI JUNYI ,  UPPALA SATHYADEV VENKATA

IPC: H04L27/26

Abstract: A composite signal includes a high power beacon signal and low power corresponding wideband synchronization signal and is communicated over a time interval exceeding a single OFDM transmission time interval. A base station transmits one or more different such composite broadcast signals in a recurring timing structure. Each different potential beacon signal, e.g., a single tone signal, is paired with a unique wideband synchronization signal. A wideband synchronization signal includes at least some predetermined null tones and at least some predetermined non-null tones. For a given wideband synchronization signal, the predetermined null tones carry predetermined modulation symbol values, A wireless terminal receives a composite signal, identifies a beacon, determines a corresponding known wideband synchronization signal, compares received to known wideband synchronization signals, and determines at least one of a timing adjustment, frequency adjustment and channel estimation.

公开(公告)号：AT476072T

公开(公告)日：2010-08-15

申请号：AT07710044

申请日：2007-01-10

Applicant: QUALCOMM INC

Inventor： LAROIA RAJIV ,  LANE FRANK ,  LI JUNYI ,  RICHARDSON THOMAS

IPC: H04W16/14 ,  H04W8/00 ,  H04W36/16 ,  H04W36/24 ,  H04W48/08 ,  H04W52/04 ,  H04W72/02 ,  H04W72/06 ,  H04W74/00 ,  H04W74/08 ,  H04W76/04 ,  H04W84/04 ,  H04W84/18 ,  H04W88/04 ,  H04W88/06

Abstract: A method of operating a first communications device, the method comprising: receiving an interference control signal from a second communications device via an air link; determining whether the second communications device is in a cooperative communications relationship or a non-cooperative communications relationship with the first communications device; and deciding whether to disregard the interference control signal or to implement an interference control operation, based on the determination as well as a corresponding apparatus.

公开(公告)号：AU2009223396A1

公开(公告)日：2009-09-17

申请号：AU2009223396

申请日：2009-02-24

Applicant: QUALCOMM INC

Inventor： RICHARDSON THOMAS ,  TAVILDAR SAURABH ,  PARK VINCENT D ,  WU XINZHOU ,  LI JUNYI ,  LAROIA RAJIV

IPC: H04W88/04

Abstract: Methods and apparatus for wireless communications in regional networks, e.g., ad hoc peer to peer networks, are described. Wireless communications devices transmit and monitor for presence indicator signals broadcast from other peer communications devices in its local vicinity. A wireless communications device maintains a list of discovered devices in its vicinity. A first wireless communications device transmits a paging signal directly over an airlink to a second communications device, which is on its list and to which it desires to send data units, e.g., user data in a peer to peer traffic segment. In response to a received paging response signal from the second device, the first device transmits data units, intended for the second device, to a third device, which acts as an intermediary node. The power level for the data unit signal is controlled to be lower than the power level used for the paging signal. FIG. 4