公开(公告)号：CA2718135A1

公开(公告)日：2009-10-01

申请号：CA2718135

申请日：2009-03-25

Applicant: QUALCOMM INC

Inventor： CHALLA RAGHU N ,  LIN JEREMY H

IPC: H04L25/06

Abstract: A demodulation mask bitmap includes binary mask values. Each mask value corresponds to an input resource element to a demodulator. For each mask value of a first state, a demodulation engine of the demodulator is not clocked and the demodulator outputs a zero-valued resource element. For each mask value of a second state, the demodulation engine is clocked, the input resource element is demodulated, and the demodulator outputs a demodulated resource element. A demodulation mask bitmap is designed to mask pilot resource elements and corrupted resource elements. Power is conserved by not clocking the demodulation engine for corrupted and pilot resource elements. Subsequent LLR generation and decode operations are simplified. Decoder performance is improved because the decoder does not decode LLR values derived from corrupted resource elements and/or resource elements not relevant to the reconstruction of a communicated message.

公开(公告)号：ES2318353T3

公开(公告)日：2009-05-01

申请号：ES04795424

申请日：2004-10-14

Applicant: QUALCOMM INC

Inventor： SENDONARIS ANDREW ,  SHIU DA-SHAN ,  FARMER DOMINIC GERARD ,  LIN JEREMY H ,  SUBRAHMANYA PARVATHANATHAN ,  ROWLAND THOMAS K

IPC: G01S19/25 ,  G01S19/23 ,  H04L27/00 ,  H04B1/38

Abstract: Un dispositivo de comunicaciones, que comprende: medios (108) para producir una primera señal de referencia (108b) y una segunda señal de referencia (108a); medios (106) para recuperar una primera señal de información de una primera portadora usando la primera señal de referencia; medios (102) para recuperar una segunda señal de información de una segunda portadora usando la segunda señal de referencia, estando configurados los medios para recuperar la segunda señal de información para operar en un estado activo y en un estado en reposo; medios para detectar un error de frecuencia (116c) en la primera señal de información; y caracterizado porque además comprende medios (116) para sintonizar de manera periódica la primera señal de referencia para reducir el error de frecuencia, en el que los medios para sintonizar la primera señal de referencia para reducir el error de frecuencia hacen posible la sintonización de la primera señal de referencia si el error de frecuencia cruza un primer umbral, y una vez habilitado, continuar sintonizando la primera señal de referencia hasta que el error de frecuencia sea reducido por debajo de un segundo umbral, y en el que el primer umbral y el segundo umbral son una función del estado del medio para recuperar la segunda señal de información proveniente de la segunda portadora.

公开(公告)号：DE60230256D1

公开(公告)日：2009-01-22

申请号：DE60230256

申请日：2002-05-03

Applicant: QUALCOMM INC

Inventor： AGRAWAL AVNEESH ,  LIN JEREMY H

IPC: H04B1/7115 ,  H04B1/7117

Abstract: Techniques for increased finger demodulation capability in a hardware efficient manner are disclosed. In one aspect, I and Q samples are shifted into a parallel-accessible shift register. A plurality of chip samples are accessed from the shift register and operated on in parallel to produce a multi-chip result for a channel each cycle. These multi-chip results can be accumulated and output to a symbol-rate processor on symbol boundaries. The scheduling of shift register access, computation, and accumulation can be scheduled such that the hardware is time-shared to support a large number of channels. In another aspect, time-tracking of a large number of channels can be accommodated through channel-specific indexing of the contents of the shift register file. These aspects, along with various others also presented, provide for hardware efficient chip rate processing capability for a large number of channels, with a high degree of flexibility in deployment of those channels.

公开(公告)号：AT415766T

公开(公告)日：2008-12-15

申请号：AT04795424

申请日：2004-10-14

Applicant: QUALCOMM INC

Inventor： SENDONARIS ANDREW ,  SHIU DA-SHAN ,  FARMER DOMINIC GERARD ,  LIN JEREMY H ,  SUBRAHMANYA PARVATHANATHAN ,  ROWLAND THOMAS K

IPC: G01S19/25 ,  H04L27/00 ,  G01S19/23 ,  H04B1/38

Abstract: Systems and techniques are disclosed relating to wireless communications. These systems and techniques involve wireless communications wherein a device may be configured to recover an information signal from a carrier using a reference signal, detect a frequency error in the information signal; and periodically tune the reference signal to reduce the frequency error. To prevent GPS performance degradation during LO tuning, a tuning indicator signal may be generated and provided to the GPS receiver to disable GPS operation.

公开(公告)号：AU2009228915B2

公开(公告)日：2013-05-23

申请号：AU2009228915

申请日：2009-03-10

Applicant: QUALCOMM INC

Inventor： PRAKASH RAJAT ,  LIN JEREMY H ,  SAMPATH HEMANTH ,  OTTE KURT

IPC: H04W36/14 ,  H04W36/36

Abstract: A reference signal management (RSM) program executing on a mobile device detects multiple reference signals, allocates those reference signals into groups, and performs reference signal management functions using information conveyed in the reference signals. The RSM program detects both broadband and narrowband reference signals and maintains updated groups of reference signals that are transmitted from access points with independent configurations or different radio technologies. Battery power of the mobile device is efficiently used to manage reference signals in heterogeneous network environments by preventing unnecessary handoffs, overhead downloads, access probes and new registrations. Reference signals are managed from both synchronous and asynchronous sectors and in idle mode as well as in connected state mode. The RSM program performs functions such as managing handoffs between access points, managing an idle mode of the mobile device, managing an active group of the detected reference signals, and collecting overhead parameters for the mobile device.

公开(公告)号：UA101655C2

公开(公告)日：2013-04-25

申请号：UAA201012714

申请日：2009-03-10

Applicant: QUALCOMM INC

Inventor： SAMPATH HEMANTH ,  LIN JEREMY H ,  OTTE KURT ,  PRAKASH RAJAT

IPC: H04W36/14 ,  H04W36/36

Abstract: Програмакеруванняопорнимисигналами (RSM), щовиконуєтьсяв мобільномупристрої, виявляємножинуопорнихсигналів, розподіляєціопорнісигналинагрупиі виконуєфункціїкеруванняопорнимисигналамиз використаннямінформації, щопереправляєтьсяв опорнихсигналах. RSM- програмавиявляєякширокосмугові, такі вузькосмуговіопорнісигналиі зберігаєоновленігрупиопорнихсигналів, якіпередаютьз точокдоступуз незалежнимиконфігураціямиаборізнимитехнологіямирадіозв'язку. Живленняакумуляторамобільногопристроюефективновикористовуєтьсядлятого, щобкеруватиопорнимисигналамив гетерогеннихмережнихоточеннях, задопомогоюзапобіганнянепотрібнимпередачамобслуговування, службовихзавантажень, пробдоступуі новихреєстрацій. Опорнісигналикеруютьсяякз синхронних, такі засинхроннихсекторіві врежимібездіяльності, ітакожв режиміпідключеногостану. RSM- програмавиконуєтакіфункції, яккеруванняпередачамиобслуговуванняміжточкамидоступу, керуваннярежимомбездіяльностімобільногопристрою, керуванняактивноюгрупоювиявленихопорнихсигналіві збірслужбовихпараметрівдлямобільногопристрою.

公开(公告)号：BRPI0806485A2

公开(公告)日：2011-09-27

申请号：BRPI0806485

申请日：2008-01-03

Applicant: QUALCOMM INC

Inventor： PALANKI RAVI ,  LIN JEREMY H ,  KHANDEKAR AAMOD ,  GOROKHOV ALEXEI ,  AGRAWAL AVNEESH

IPC: H04L1/00 ,  H04L12/70

Abstract: Techniques for transmitting data in a communication system are described. A packet may be partitioned into multiple subpackets, and each subpacket may be encoded separately. The subpackets may be mapped to resources assigned for transmission of the packet, with at least one subpacket being mapped to a subset of the assigned resources. The assigned resources may include multiple tiles, with each tile corresponding to a block of time frequency resources. The subpackets may be mapped to the tiles such that (i) the subpackets are mapped to equal number of tiles to achieve similar decoding performance, (ii) each subpacket is mapped to at least NMIN tiles, if available, to achieve a certain minimum diversity order for the subpacket, and/or (iii) each subpacket is mapped to a subset of the multiple tiles, if possible, so that the subpacket can be decoded without having to demodulate all of the tiles.

公开(公告)号：CA2713144A1

公开(公告)日：2009-08-20

申请号：CA2713144

申请日：2009-02-13

Applicant: QUALCOMM INC

Inventor： PALANKI RAVI ,  LIN JEREMY H ,  SAMPATH HEMANTH

IPC: H04B7/26

Abstract: A communications system and method for a wireless mobile device is provided. The method includes performing sleep mode operations in a device and performing wake-up operations with one or more base stations in view of the sleep mode operations in the device. The method also includes demodulating a communications channel for the device during sleep mode operations in the device and prior to synchronizing with the base stations.

公开(公告)号：CA2673878A1

公开(公告)日：2008-07-17

申请号：CA2673878

申请日：2008-01-04

Applicant: QUALCOMM INC

Inventor： LIN JEREMY H ,  KHANDEKAR AAMOD ,  GOROKHOV ALEXEI ,  AGRAWAL AVNEESH ,  PALANKI RAVI

IPC: H04L1/00

Abstract: Techniques for encoding and decoding data are described. In an aspect, mu ltiple code rates for a forward error correction (FEC) code may be supported , and a suitable code rate may be selected based on packet size. A transmitt er may obtain at least one threshold to use for code rate selection, determi ne a packet size to use for data transmission, and select a code rate from a mong the multiple code rates based on the packet size and the at least one t hreshold. In another aspect, multiple FEC codes of different types (e.g., Tu rbo, LDPC, and convolutional codes) may be supported, and a suitable FEC cod e may be selected based on packet size. The transmitter may obtain at least one threshold to use for FEC code selection and may select an FEC code from among the multiple FEC codes based on the packet size and the at least one t hreshold.

公开(公告)号：CA2491518A1

公开(公告)日：2004-01-15

申请号：CA2491518

申请日：2003-07-09

Applicant: QUALCOMM INC

Inventor： LIN JEREMY H ,  SUBRAHMANYA PARVATHANATHAN

IPC: H04B1/707

Abstract: Techniques for inner/outer loop tracking that is stable and provides desirab le loop convergence characteristics are disclosed. In one aspect, the contribution from any one inner loop to the tracking function of the outer loop (260) is limited, to prohibit any one received signal component from dominating the outer loop. In another aspect, the rate of outer loop trackin g variation is controlled to provide inner and outer loop stability. Various other aspects are also presented. These aspects have the benefit of providin g stable inner and outer loop control, as well as efficient convergence and tracking by the various loops, resulting in reduced frequency error and improved communication performance.