公开(公告)号：WO2009120724A3

公开(公告)日：2009-11-19

申请号：PCT/US2009038146

申请日：2009-03-24

Applicant: QUALCOMM INC ,  SAMPATH HEMANTH ,  AGRAWAL AVNEESH ,  LIN JEREMY H

Inventor： SAMPATH HEMANTH ,  AGRAWAL AVNEESH ,  LIN JEREMY H

IPC: H04L25/06 ,  H03M13/45

CPC classification number: H03M13/45 ,  H03M13/6588 ,  H04L1/0046 ,  H04L1/1819 ,  H04L1/1822 ,  H04L1/1835 ,  H04L1/1845 ,  H04L5/0007 ,  H04L25/067

Abstract: A system involves a transmitting device (for example, a first wireless communication device) and a receiving device (for example, a second wireless communication device). In the receiving device, LLR (Log-Likelihood Ratio) values are stored into an LLR buffer. LLR bit width is adjusted as a function of packet size of an incoming transmission to reduce the LLR buffer size required and/or to prevent LLR buffer capacity from being exceeded. The receiver may use a higher performance demodulator in order to maintain performance despite smaller LLR bit width. In the transmitting device, encoder code rate is adjusted as a function of receiver LLR buffer capacity and packet size of the outgoing transmission such that receiver LLR buffer capacity is not exceeded. Any combination of receiver LLR bit width adjustment, demodulator selection, and encoder code rate adjustment can be practiced to reduce LLR buffer size required while maintaining performance.

Abstract translation: 系统涉及发送设备（例如，第一无线通信设备）和接收设备（例如，第二无线通信设备）。 在接收设备中，将LLR（对数似然比）值存储到LLR缓冲器中。 根据输入传输的分组大小调整LLR比特宽度，以减少所需的LLR缓冲区大小和/或防止超出LLR缓冲区容量。 接收机可以使用更高性能的解调器，以便尽管较小的LLR位宽度来保持性能。 在发送设备中，根据接收机LLR缓冲器容量和输出传输的分组大小来调节编码器码率，使得接收机LLR缓冲器容量不被超过。 可以实现接收机LLR位宽度调整，解调器选择和编码器码率调整的任何组合，以在保持性能的同时减少所需的LLR缓冲区大小。

公开(公告)号：WO2008086236A3

公开(公告)日：2008-09-04

申请号：PCT/US2008050316

申请日：2008-01-04

Applicant: QUALCOMM INC ,  PALANKI RAVI ,  LIN JEREMY H ,  KHANDEKAR AAMOD ,  GOROKHOV ALEXEI ,  AGRAWAL AVNEESH

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

IPC: H04L1/00

CPC classification number: H04L1/0007 ,  H04L1/0009 ,  H04L1/0021 ,  H04L1/0042 ,  H04L1/1812 ,  H04L1/1822

Abstract: Techniques for encoding and decoding data are described. In an aspect, multiple 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 transmitter may obtain at least one threshold to use for code rate selection, determine a packet size to use for data transmission, and select a code rate from among the multiple code rates based on the packet size and the at least one threshold. In another aspect, multiple FEC codes of different types (e.g., Turbo, LDPC, and convolutional codes) may be supported, and a suitable FEC code 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 threshold.

Abstract translation: 描述用于编码和解码数据的技术。 在一方面，可以支持用于前向纠错（FEC）码的多个码率，并且可以基于分组大小来选择合适的码率。 发射机可以获得用于码率选择的至少一个阈值，确定用于数据传输的分组大小，并且基于分组大小和至少一个阈值从多个码率中选择码率。 在另一方面，可以支持不同类型的多个FEC码（例如Turbo，LDPC和卷积码），并且可以基于分组大小来选择合适的FEC码。 发射机可以获得用于FEC码选择的至少一个阈值，并且可以基于分组大小和至少一个阈值从多个FEC码中选择FEC码。

公开(公告)号：WO2009120479A3

公开(公告)日：2010-01-14

申请号：PCT/US2009036437

申请日：2009-03-07

Applicant: QUALCOMM INC ,  CHAUDHURI ARUNAVA ,  YAO IWEN ,  LIN JEREMY H ,  GURSKI REMI ,  YEN KEVIN W

Inventor： CHAUDHURI ARUNAVA ,  YAO IWEN ,  LIN JEREMY H ,  GURSKI REMI ,  YEN KEVIN W

IPC: G06F15/78 ,  G06F9/30 ,  G06F9/38 ,  G06F9/48 ,  H04M1/725

CPC classification number: G06F9/3879 ,  G06F15/7814

Abstract: A flexible and reconf?gurable digital system (for example, a wireless modem) includes a set of sub-circuits. Each sub-circuit includes a task manager and an amount of configurable hardware circuitry for performing a type of operation on a data stream. The task manager of a sub-circuit can configure and control the configurable hardware of the sub-circuit. A central processor configures and orchestrates operation of the sub- circuits by maintaining a set of task lists in a tightly coupled memory. Each task list includes task instructions for a corresponding sub-circuit. The task manager of a sub- circuit reads task instructions from its task list and controls its associated hardware circuitry as directed by the instructions. A timestamp task instruction and a push task instruction and the task list architecture allow modem sub-circuits to be easily reconfigured to operate in accordance with either a first air interface standard or a second air interface standard.

Abstract translation: 灵活和可重构的数字系统（例如，无线调制解调器）包括一组子电路。 每个子电路包括任务管理器和用于对数据流执行一种操作的可配置硬件电路的量。 子电路的任务管理器可以配置和控制子电路的可配置硬件。 中央处理器通过在紧耦合的存储器中维护一组任务列表来配置和协调子电路的操作。 每个任务列表包括相应子电路的任务指令。 子电路任务管理器从其任务列表中读取任务指令，并根据指令控制其相关的硬件电路。 时间戳任务指令和推送任务指令以及任务列表架构允许将调制解调器子电路轻松地重新配置为根据第一空中接口标准或第二空中接口标准进行操作。

公开(公告)号：WO2009120913A3

公开(公告)日：2011-01-13

申请号：PCT/US2009038473

申请日：2009-03-27

Applicant: QUALCOMM INC ,  CHAUDHURI ARUNAVA ,  SAMPATH HEMANTH ,  YAO IWEN ,  LIN JEREMY H ,  CHALLA RAGHU N ,  WU MIN

Inventor： CHAUDHURI ARUNAVA ,  SAMPATH HEMANTH ,  YAO IWEN ,  LIN JEREMY H ,  CHALLA RAGHU N ,  WU MIN

IPC: G06F17/14

CPC classification number: G06F17/142 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0053 ,  H04L27/265 ,  H04L27/2662

Abstract: An improved processing engine for performing Fourier transforms includes an instruction processor configured to process sequential instruction software commands and a Fourier transform engine coupled to the instruction processor. The Fourier transform engine is configured to perform Fourier transforms on a serial stream of data. The Fourier transform engine is configured to receive configuration information and operational data from the instruction processor via a set of software tasks.

Abstract translation: 用于执行傅里叶变换的改进的处理引擎包括配置成处理顺序指令软件命令的指令处理器和耦合到指令处理器的傅里叶变换引擎。 傅立叶变换引擎被配置为对串行数据流执行傅里叶变换。 傅里叶变换引擎被配置为经由一组软件任务从指令处理器接收配置信息和操作数据。

公开(公告)号：WO2009120640A3

公开(公告)日：2011-01-20

申请号：PCT/US2009037989

申请日：2009-03-23

Applicant: QUALCOMM INC ,  SAMPATH HEMANTH ,  ZHANG XIN ,  LIN JEREMY H ,  SHARMA NISTHA ,  PALANKI RAVI ,  KANDUKURI NARAYANA SUNIL KUMAR

Inventor： SAMPATH HEMANTH ,  ZHANG XIN ,  LIN JEREMY H ,  SHARMA NISTHA ,  PALANKI RAVI ,  KANDUKURI NARAYANA SUNIL KUMAR

IPC: G06F17/14

CPC classification number: G06F17/142 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0053 ,  H04L27/265

Abstract: In embodiments, a wireless receiver employs a hardware-based Fast Fourier Transform (FFT) engine controlled by firmware. The FFT engine executes tasks stored in a task list. Each task is associated with a different portion of a signal, for example, one or more Orthogonal Frequency Division Modulated (OFDM) symbols. Each task may include configuration information for the FFT engine for configuring the engine to process the associated portion of the signal, a pointer to the portion to be processed, and another pointer to the memory for storing the output. The task list may be firmware controlled. Division of the FFT into a configurable hardware part driven by firmware to read and execute the tasks in the task list may speed up the FFT process and make it more flexible. A hardware beacon sorter may be coupled to the FFT engine to sort the sub-carriers according to their energies.

Abstract translation: 在实施例中，无线接收机采用由固件控制的基于硬件的快速傅立叶变换（FFT）引擎。 FFT引擎执行任务列表中存储的任务。 每个任务与信号的不同部分相关联，例如一个或多个正交频分调制（OFDM）符号。 每个任务可以包括用于配置引擎以处理信号的相关部分的引擎的FFT引擎的配置信息，到要处理的部分的指针，以及用于存储输出的另一个指向存储器的指针。 任务列表可以是固件控制的。 将FFT分解为由固件驱动的可配置硬件部分，以读取和执行任务列表中的任务，可加速FFT过程并使其更加灵活。 硬件信标分类器可以耦合到FFT引擎，以根据它们的能量对子载波进行分类。

公开(公告)号：WO2004006460A2

公开(公告)日：2004-01-15

申请号：PCT/US0321595

申请日：2003-07-09

Applicant: QUALCOMM INC

Inventor： SUBRAHMANYA PARVATHANATHAN ,  LIN JEREMY H

IPC: H04B1/707

CPC classification number: H04B1/712

Abstract: Techniques for inner/outer loop tracking that is stable and provides desirable 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 tracking variation is controlled to provide inner and outer loop stability. Various other aspects are also presented. These aspects have the benefit of providing 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.

Abstract translation: 公开了内/外循环跟踪的技术，它是稳定的并且提供期望的回路收敛特性。 在一个方面，来自外环（260）的任何内循环到跟踪功能的贡献被限制，以禁止任何一个接收信号分量控制外循环。 在另一方面，控制外环跟踪变化的速率以提供内环和外环的稳定性。 还提出了各种其他方面。 这些方面具有提供稳定的内外环控制以及通过各种环路的有效收敛和​​跟踪的优点，导致降低的频率误差和改进的通信性能。

公开(公告)号：WO0221716A3

公开(公告)日：2002-06-06

申请号：PCT/US0126947

申请日：2001-08-28

Applicant: QUALCOMM INC

Inventor： LIN JEREMY H ,  AGRAWAL AVNEESH ,  TERASAWA DAISUKE

IPC: H04B1/707 ,  H04Q7/38

CPC classification number: H04B1/707 ,  H04B1/70751 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70707

Abstract: Techniques for generating a reference signal based on time-multiplexed pilot data. A modulated signal is received (FIG. 7) and processed to provide received samples, which are then further processed to provide pilot symbols. A reference signal is generated based on the available pilot symbols (722a, 722b). The reference signal comprises a sequence of "predicted" pilot symbols representative of future estimates of one or more characteristics (e.g., the phase and amplitude) of one or more carrier signals used to generate the modulated signal (FIG's 5A-5E). The reference signal can be generated using a number of techniques. For example, the reference signal can be generated by (e.g., linearly) extrapolating pilot symbols from prior time intervals (FIG. 5B), curve fitting the pilot symbols (FIG. 5C), or (normal or ensemble) averaging (unweighted or weighted) pilot symbols (FIG's 5D, 5E). For the W-CDMA standard, the processing to generate the pilot symbols typically includes decovering the received samples with a channelization code to provide channelized symbols (720a, 720b), and multiplying the channelized symbols with a particular pilot symbol pattern. The pilot symbols from each slot may also be filtered to generate one or more filtered pilot symbols.

Abstract translation: 基于时分复用导频数据产生参考信号的技术。 接收调制信号（图7）并进行处理以提供接收的样本，然后进一步处理以提供导频符号。 基于可用导频符号（722a，722b）生成参考信号。 参考信号包括代表用于产生调制信号的一个或多个载波信号的一个或多个特性（例如，相位和幅度）的未来估计的“预测”导频符号序列（图5A-5E）。 可以使用许多技术来产生参考信号。 例如，参考信号可以通过（例如，线性地）从先前的时间间隔（图5B）推导导频符号，拟合导频符号（图5C）或（正常或合并）平均（未加权或加权的） ）导频符号（图5D，5E）。 对于W-CDMA标准，用于生成导频符号的处理通常包括用信道化码来解码所接收的样本，以提供信道化符号（720a，720b），并将信道化符号与特定导频符号模式相乘。 也可以对来自每个时隙的导频符号进行滤波以产生一个或多个滤波的导频符号。