公开(公告)号：CA2381555A1

公开(公告)日：2001-03-08

申请号：CA2381555

申请日：2000-08-31

Applicant: QUALCOMM INC

Inventor： CHEN TAO ,  PATEL SHIMMAN

IPC: H03M13/45 ,  H04B7/005 ,  H04L1/00 ,  H04L1/20 ,  H04L27/30 ,  H04W52/26

Abstract: Techniques for detecting zero rate frames in a received data transmission. A modulated signal is received and demodulated in accordance with a particular demodulation format to generate demodulated symbols. The demodulated symbols are partitioned into a number of received frames. For each received frame, a quality metric is computed and compared against a threshold value. The threshold value is selected based, in part, on the quality metrics of receiv ed frames. Based on the comparison result, the received frame is indicated as being either transmitted and received in error (i.e., erased or bad) or not transmitted at all (i.e., zero rate or empty). The quality metric can relate to an energy of a received frame, a distance between a received frame and a codeword corresponding to the received frame, or other metrics. The threshol d value can be selected based on the quality metrics computed for decoded fram es or received frames identified as good, and can be dynamically adjusted based on current information available at the receiver. The method is advantageous ly used in a CDMA communications system (100).

公开(公告)号：AU5484300A

公开(公告)日：2001-01-02

申请号：AU5484300

申请日：2000-06-12

Applicant: QUALCOMM INC

Inventor： PATEL SHIMMAN ,  WILBORN THOMAS

IPC: H03G3/30 ,  H04B14/04 ,  H04J1/00 ,  H04J1/05 ,  H04L5/06 ,  H04B7/005 ,  H04B1/28

Abstract: A method and a receiver for processing a desired signal for decoding (i.e., by a decoder). In accordance with the method, an input signal that includes the desired signal and additional signals is received and filtered with a first filter having a bandwidth greater than a bandwidth of the desired signal. The filtered signal is then sampled to generate discrete time samples, which is then filtered with a discrete time matched filter. The filtered samples are then scaled with a scaling factor and quantized. A quantity related to an amplitude of the quantized samples (i.e., power) is measured, and the scaling factor is adjusted in accordance with the measured quantity. The quantized samples can be further processed (i.e., demodulated) and provided to a decoder. The desired signal can be a quadrature modulated signal, in which case matched filtering, scaling, and quantization are performed on the in-phase and quadrature components of the desired signal. The adjustment of the scaling factor can be performed by an automatic gain control (AGC) loop that compares the measured quantity (e.g., signal power of the quantized samples) against a predetermined value to generate error values. The AGC loop then filters the error values to generate the scaling factor. In an embodiment, the loop filtering can be performed with an integrator.

公开(公告)号：WO02060084A3

公开(公告)日：2002-12-19

申请号：PCT/US0200681

申请日：2002-01-11

Applicant: QUALCOMM INC

Inventor： RICK ROLAND R ,  PATEL SHIMMAN ,  SAINTS KEITH ,  ZHANG HAITAO

IPC: H04B1/7117 ,  H04B7/06 ,  H04B1/707

CPC classification number: H04B1/7085 ,  H04B1/7117 ,  H04B7/0697

Abstract: An apparatus, such as a subscriber unit or a base station within a spread spectrum communication system, provides advanced control over the time-tracking of demodulation elements (30A-30N) when unresolvable multipath situations arise. The apparatus provides merge protection that prevents clustered demodulation elements from contracting beyond a minimum time span. In addition, the apparatus provides a master/slave feature for synchronizing the time-tracking of the demodulation elements when clustered around a multipath signal.

Abstract translation: 在扩展频谱通信系统中的诸如用户单元或基站之类的装置，当不可解决的多径情况出现时，提供对解调元件（30A-30N）的时间跟踪的高级控制。 该装置提供合并保护，防止聚集的解调元件超出最小时间间隔。 此外，该设备提供主/从功能，用于在聚集在多路径信号周围时同步解调元件的时间跟踪。

公开(公告)号：WO2007117325A3

公开(公告)日：2008-07-24

申请号：PCT/US2006062125

申请日：2006-12-14

Applicant: QUALCOMM INC ,  PATEL SHIMMAN ,  LAI KUEI-CHIANG ,  GLAZKO SERGUEI A

Inventor： PATEL SHIMMAN ,  LAI KUEI-CHIANG ,  GLAZKO SERGUEI A

IPC: H04L27/26 ,  H04L27/00 ,  H04L27/38

CPC classification number: H04L27/2695 ,  H04L5/0048 ,  H04L25/022 ,  H04L25/0228 ,  H04L27/2613 ,  H04L27/2659 ,  H04L27/2662 ,  H04L27/3872 ,  H04L2027/0034 ,  H04L2027/0065

Abstract: For frequency bin error estimation, multiple hypotheses are formed for different frequency bin errors, pilot offsets, or combinations of frequency bin error and pilot offset. For each hypothesis, received symbols are extracted from the proper subbands determined by the hypothesis. In one scheme, the extracted received symbols for each hypothesis are despread with a scrambling sequence to obtain despread symbols for that hypothesis. A metric is derived for each hypothesis based on the despread symbols, e.g., by deriving a channel impulse response estimate based on the despread symbols and then deriving the metric based on the channel impulse response estimate. In another scheme, the extracted received symbols for each hypothesis are correlated, and a metric is derived based on the correlation results. For both schemes, the frequency bin error and/or the pilot offset are determined based on the metrics for all hypotheses evaluated.

Abstract translation: 对于频率块误差估计，针对不同的频率误差，导频偏移或频率误差和导频偏移的组合形成多个假设。 对于每个假设，从由假设确定的适当子带中提取接收符号。 在一个方案中，每个假设的提取的接收符号用加扰序列解扩，以获得该假设的解扩符号。 基于解扩符号为每个假设导出度量，例如通过基于解扩符号导出信道脉冲响应估计，然后基于信道脉冲响应估计导出度量。 在另一方案中，将每个假设的提取的接收符号相关联，并且基于相关结果导出度量。 对于两种方案，基于所评估的所有假设的度量来确定频率块误差和/或导频偏移。

公开(公告)号：ES2883233T3

公开(公告)日：2021-12-07

申请号：ES16767399

申请日：2016-08-24

Applicant: QUALCOMM INC

Inventor： LEI JING ,  VAJAPEYAM MADHAVAN ,  CHEN WANSHI ,  RICO ALVARINO ALBERTO ,  WANG RENQIU ,  XU HAO ,  FAKOORIAN SEYED ALI AKBAR ,  PATEL SHIMMAN ,  GAAL PETER

IPC: H04W74/08 ,  H04W72/02

Abstract: Un procedimiento para la comunicación inalámbrica, que comprende: identificar (1705) una clase de cobertura para un dispositivo inalámbrico (115) basado al menos en parte, en una característica de un enlace de comunicación (125) asociado con el dispositivo inalámbrico (115); identificar (1710), para la clase de cobertura, un subconjunto de subportadoras de un conjunto de subportadoras para la transmisión de los mensajes de acceso aleatorio; comunicar (1715) en el subconjunto de subportadoras; identificar (1905) una subportadora del subconjunto de subportadoras dentro de una región de banda estrecha (315) de un ancho de banda del sistema de comunicaciones inalámbricas para la transmisión de un mensaje de acceso aleatorio; identificar (1910) una carga útil para incluir en el mensaje de acceso aleatorio; y transmitir (1915) el mensaje de acceso aleatorio que incluye la carga útil que hace uso de la subportadora identificada.

公开(公告)号：ES2860374T3

公开(公告)日：2021-10-05

申请号：ES19172390

申请日：2017-03-01

Applicant: QUALCOMM INC

Inventor： RICO ALVARINO ALBERTO ,  CHEN WANSHI ,  PATEL SHIMMAN ,  GRIOT MIGUEL

IPC: H04W4/90 ,  H04L12/18 ,  H04W48/16 ,  H04W52/02 ,  H04W56/00 ,  H04W72/04

Abstract: Un procedimiento (1100) de comunicaciones inalámbricas realizado por un equipo de usuario "UE", que comprende: recibir información de una primera estación base "BS" en una célula de servicio, y al menos una segunda BS en al menos una célula vecina, el UE dispuesto en la célula de servicio; detectar (1102), a partir de la información recibida, un tipo de célula de cada una de las células de servicio y la al menos una célula vecina como parte de un procedimiento de acampada de célula de servicio de alerta móvil, siendo el tipo de célula uno de una célula adecuada, una célula aceptable o una célula de solo notificación, estando asociada la célula de solo notificación con un servicio autónomo "eMBMS" de servicio mejorado de radiodifusión y multidifusión; determinar (1104) que el tipo de célula de la célula de servicio es una célula de solo notificación y que el tipo de célula de al menos una célula vecina no es una célula adecuada ni una célula aceptable; y acampar (1106) en la célula de servicio según la determinación, en el que una célula adecuada está configurada para proporcionar servicios de comunicación inalámbrica, una célula aceptable está configurada para proporcionar alertas móviles de emergencia y llamadas de emergencia, y una célula de solo notificación está configurada para proporcionar alertas móviles de emergencia y servicios eMBMS.

公开(公告)号：AU2017247162B2

公开(公告)日：2021-05-27

申请号：AU2017247162

申请日：2017-03-14

Applicant: QUALCOMM INC

Inventor： PATEL SHIMMAN ,  CHEN WANSHI ,  HOSSEINI SEYEDKIANOUSH ,  XU HAO ,  GAAL PETER ,  SUN JING

IPC: H04L5/00 ,  H04W72/04 ,  H04W72/08 ,  H04W72/12

Abstract: The present disclosure provides a unique control region that is mapped to each data region for DL DMRS transmissions. In addition, the present disclosure provides an updated DCI format that may include DL DMRS transmissions. The apparatus may receive a first content during a first TTI. In an aspect, the content may include at least a control region which includes a DMRS. In addition, a location of the DMRS may be defined by either a closed-loop precoding structure or an open-loop precoding structure. Furthermore, the duration of the first TTI may be shorter than 1 ms. The apparatus may demodulate the control region based at least on the DMRS.

公开(公告)号：ES2815651T3

公开(公告)日：2021-03-30

申请号：ES16702272

申请日：2016-01-13

Applicant: QUALCOMM INC

Inventor： CHEN WANSHI ,  MALLADI DURGA ,  GAAL PETER ,  WEI YONGBIN ,  XU HAO ,  PATEL SHIMMAN ,  DAMNJANOVIC ALEKSANDAR

IPC: H04L5/00

Abstract: Un procedimiento (1000) de comunicación inalámbrica, estando el procedimiento específicamente adaptado para: recibir (1005) una transmisión no de baja latencia que comprende una región de control (305-a) y una región de datos (310-a) durante un primer intervalo de tiempo de transmisión, TTI, caracterizado por, recibir (1010) una indicación (430) de una transmisión de baja latencia (315, 420), en el que la transmisión de baja latencia tiene una duración de un segundo TTI, en el que la transmisión de baja latencia (315, 420) está presente en al menos una parte de la región de datos (310-a, 415) del primer TTI, en el que el segundo TTI tiene una duración que es menor que la duración del primer TTI, y en el que la indicación (430) se recibe posteriormente a la transmisión de baja latencia (315, 420); y descodificar (1015) la transmisión no de baja latencia en base al menos en parte a la indicación (430).

公开(公告)号：SG11201911638SA

公开(公告)日：2020-02-27

申请号：SG11201911638S

申请日：2018-06-30

Applicant: QUALCOMM INC

Inventor： PATEL SHIMMAN ,  SORIAGA JOSEPH ,  SARKIS GABI ,  NAMGOONG JUNE

IPC: H04L1/00

Abstract: 1502 W O 20 19/0 18120 Al RECEIVE, BY A 'TRANSCEIVER CIRCUIT USING ONL OR MORE ANTLNNAELLMLIVIS LN 1,LECIRICAL COIUMUMCAIION Wrill THU TRA_NSCEIVER CIRCUIT, CONTROL INFORMATION INDICATING A MODULATION AND CODING SCIILML (MC S1 AND A RESOURCE ALLOCATION (RA) FOR TRANSMISSION OF A CODEWORD 1504 SELECT, BY THE PROCESSOR AND BASED ON THE \ ICS AND THE RA, A BASE GRAPH (BG), FROM WH CH TO DERIVE A TOW DENSITY PARITY CHECK (TITC) CODE FOR USE TN DECODING THE. CODEWORD 1506 RECEIVE, BY THE TRANSCEIVER C IRCUIT USING THE ONE OR MORE ANTENNA ELEMENTS, THE CODEWORD VIA RESOURCES OF THE RA ( -1508 DECODE, BY A DECODER CIRCUIT, THE CODEWORD USING THE LDPC CODE DERIVED FROM THE SELECTED BG FIG. 15 (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 24 January 2019 (24.01.2019) WIP0 I PCT omit III m m1111E11 oimIE (10) International Publication Number WO 2019/018120 Al (51) International Patent Classification: HO4L 1/00 (2006.01) (21) International Application Number: PCT/US2018/040507 (22) International Filing Date: 30 June 2018 (30.06.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/529,765 17 July 2017 (17.07.2017) US 16/023,807 29 June 2018 (29.06.2018) US (71) Applicant: QUALCOMM INCORPORATED [US/US]; International IP Administration, 5775 Morehouse Drive, San Diego, CA 92121-1714 (US). (72) Inventors: PATEL, Shimman, Arvind; 5775 Morehouse Drive, San Diego, CA 92121-1714 (US). SORIAGA, Joseph, Binamira; 5775 Morehouse Drive, San Diego, CA 92121-1714 (US). SARKIS, Gabi; 5775 Morehouse Drive, San Diego, CA 92121-1714 (US). NAMGOONG, June; 5775 Morehouse Drive, San Diego, CA 92121-1714 (US). (74) Agent: KENT, Preston, E. et al.; Patterson & Sheri- dan, L.L.P., 24 Greenway Plaza, Suite 1600, Houston, TX 77046-2472 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). (54) Title: COMMUNICATION TECHNIQUES APPLYING LOW-DENSITY PARITY-CHECK CODE BASE GRAPH SELEC- TION (57) : Certain aspects of the present disclosure generally relate to tech- niques for selecting a base graph to be used for wireless communications. Selec- tion can be based on a variety of factors. Abase graph can be used to derive a low-density parity-check (LDPC) code used for encoding a retransmission of an original transmission. An exemplary method generally includes selecting, based on a modulation and coding scheme (MCS) and a resource allocation (RA) for transmitting a codeword, a base graph (BG), from which to derive a low density parity check (LDPC) code for use in encoding data bits in the codeword (e.g., encoding data bits of a bitstream such that some redundant bits are included in the codeword), encoding the data bits to generate the codeword using the LDPC code derived from the selected BG, and transmitting the code- word using the MCS via resources of the RA. [Continued on next page] WO 2019/018120 Al MIDEDIMOMMIONIZEMOTHEIMIDEIHMOVOIS Published: — with international search report (Art. 21(3))

公开(公告)号：AU2017247162A1

公开(公告)日：2018-09-13

申请号：AU2017247162

申请日：2017-03-14

Applicant: QUALCOMM INC

Inventor： PATEL SHIMMAN ,  CHEN WANSHI ,  HOSSEINI SEYEDKIANOUSH ,  XU HAO ,  GAAL PETER ,  SUN JING

IPC: H04L5/00 ,  H04W72/04 ,  H04W72/08 ,  H04W72/12

Abstract: The present disclosure provides a unique control region that is mapped to each data region for DL DMRS transmissions. In addition, the present disclosure provides an updated DCI format that may include DL DMRS transmissions. The apparatus may receive a first content during a first TTI. In an aspect, the content may include at least a control region which includes a DMRS. In addition, a location of the DMRS may be defined by either a closed-loop precoding structure or an open-loop precoding structure. Furthermore, the duration of the first TTI may be shorter than 1 ms. The apparatus may demodulate the control region based at least on the DMRS.