公开(公告)号：WO2011106264A2

公开(公告)日：2011-09-01

申请号：PCT/US2011025552

申请日：2011-02-18

Applicant: QUALCOMM INC ,  MCCLOUD MICHAEL L ,  BREHLER MATTHIAS ,  PARK JU WON ,  PARK JONG HYEON ,  KIM JE WOO ,  KANG INYUP ,  BANISTER BRIAN C

Inventor： MCCLOUD MICHAEL L ,  BREHLER MATTHIAS ,  PARK JU WON ,  PARK JONG HYEON ,  KIM JE WOO ,  KANG INYUP ,  BANISTER BRIAN C

CPC classification number: H04L25/03229 ,  H04B7/0413 ,  H04L25/03242 ,  H04L25/03318 ,  H04L2025/0342 ,  H04L2025/03426

Abstract: Providing for reduced complexity or improved accuracy in de-mapping received wireless data streams for multi-channel wireless communication is described herein. By way of example, a low-complexity likelihood algorithm can be employed to de-map data bits from the wireless data streams. In one particular example, the likelihood algorithm can approximate a received bit with a subset of received wireless symbols correlated the bit, reducing algorithm complexity. In other examples, a limited set of received wireless symbols can be employed for the subset, further reducing algorithm complexity. According to at least one other example, logarithmic terms of the algorithm can be approximated with non-logarithmic functions, such as a look-up table, series expansion, polynomial approximation, or the like. These approximations can enhance symbol de-mapping accuracy while maintaining or improving processing overhead for a wireless receiver.

Abstract translation: 这里描述了降低复杂度或提高对多信道无线通信的接收无线数据流解映射的准确性。 作为示例，可以采用低复杂度似然算法来从无线数据流解映射数据比特。 在一个特定示例中，似然算法可以用接收到的无线符号的子集近似接收到的比特，从而降低算法的复杂度。 在其他示例中，可以对子集采用有限的一组接收到的无线符号，进一步降低了算法的复杂度。 根据至少另一个示例，算法的对数项可以用非对数函数近似，例如查找表，串联展开，多项式近似等。 这些近似可以增强符号解映射精度，同时保持或改善无线接收机的处理开销。

公开(公告)号：WO2009158043A1

公开(公告)日：2009-12-30

申请号：PCT/US2009/031529

申请日：2009-01-21

Applicant: QUALCOMM INCORPORATED ,  PARK, Jong Hyeon ,  BANISTER, Brian Clark ,  KANG, Inyup ,  KIM, Je Woo ,  HURT, James Y. ,  BREHLER, Matthias

Inventor： PARK, Jong Hyeon ,  BANISTER, Brian Clark ,  KANG, Inyup ,  KIM, Je Woo ,  HURT, James Y. ,  BREHLER, Matthias

IPC: H04L1/06

CPC classification number: H04L1/0631 ,  H04L1/0662

Abstract: Space time coding (STC) may be applied at the transmitter adding redundant information in both space and time dimensions. At the receiver, the received STC signal may be decoded using a spatial multiplexing MIMO decoding, for example, based on either Minimum Mean Square Error (MMSE) or maximum-likelihood (ML) algorithms. A selective STC decoder may incorporate both the conventional maximum ratio combining (MRC) decoding scheme and a MIMO decoding scheme. One of the STC decoding schemes may be selected, for example, based on estimated channel conditions in order to achieve a trade-off between error rate performance and computational complexity. Components used for a non-selected scheme may be powered down.

Abstract translation: 空间时间编码（STC）可以在发射机上应用于空间和时间维度上的冗余信息。 在接收机处，可以使用例如基于最小均方误差（MMSE）或最大似然（ML）算法的空间复用MIMO解码来解码所接收的STC信号。 选择性STC解码器可以并入常规的最大比合并（MRC）解码方案和MIMO解码方案。 可以例如基于估计的信道条件来选择STC解码方案之一，以便实现错误率性能和计算复杂度之间的权衡。 用于未选择方案的组件可能会关闭电源。

公开(公告)号：WO2006122101A2

公开(公告)日：2006-11-16

申请号：PCT/US2006017879

申请日：2006-05-08

Applicant: QUALCOMM INC ,  KANG INYUP

Inventor： KANG INYUP

IPC: H04B7/216

CPC classification number: H04B1/7083 ,  H04B1/70735

Abstract: A method and apparatus for reduced acquisition time are disclosed. In one embodiment, such as in a W-CDMA system, a receiver receives one or more signals from remote stations, each signal comprising a scrambling code associated with one of a plurality of code groups, each code group identified by a unique series of a synchronization codes. A searcher identifies a subset of first synchronization codes, and a processor selects one or more hypotheses in response to the received subset. The searcher may then perform searching for a scrambling code in accordance with the one or more hypotheses. The scrambling code search may be performed in parallel with continued synchronization code searching. Various other embodiments are also disclosed.

Abstract translation: 公开了一种缩短采集时间的方法和装置。 在一个实施例中，例如在W-CDMA系统中，接收机从远程站接收一个或多个信号，每个信号包括与多个代码组中的一个相关联的扰码，每个代码组由唯一的一系列 同步码 搜索者识别第一同步码的子集，并且处理器响应于所接收的子集选择一个或多个假设。 然后，搜索者可以根据一个或多个假设执行搜索扰码。 可以与继续的同步码搜索并行地执行扰码搜索。 还公开了各种其它实施例。

公开(公告)号：WO2011106651A3

公开(公告)日：2011-11-24

申请号：PCT/US2011026254

申请日：2011-02-25

Applicant: QUALCOMM INC ,  JI ZHU ,  BANISTER BRIAN CLARKE ,  KANG INYUP

Inventor： JI ZHU ,  BANISTER BRIAN CLARKE ,  KANG INYUP

IPC: H03H17/02 ,  H03H17/06

CPC classification number: H03H17/0294 ,  H03H17/0642

Abstract: Disclosed are methods and apparatus for sampling rate conversion in a wireless transceiver. The methods and apparatus achieve agile setting of sampling rates or resampling by adaptively setting a sampling rate of a signal based on at least one performance requirement of the transceiver. In particular, the methods and apparatus perform sampling of an input signal at a first sampling rate to gain one or more input signal samples. The input signal samples are then filtered using parallel or polyphase filtering operating at a second sampling rate lower than the first sampling rate. The filtered samples are then interpolated at the second sampling rate to achieve resampling of the input signal. Polyphase filtering affords an effectively high input sampling rate for good spectrum image rejection, while allowing the second sampling rate to be effectively much lower than the first rate, thereby reducing the complexity of multiplier operations for interpolation.

Abstract translation: 公开了用于无线收发器中的采样率转换的方法和设备。 该方法和装置通过基于收发器的至少一个性能需求自适应地设置信号的采样率来实现采样速率的灵活设置或重采样。 特别地，该方法和设备以第一采样率对输入信号进行采样以获得一个或多个输入信号采样。 然后使用以低于第一采样率的第二采样率进行操作的并行或多相滤波对输入信号采样进行滤波。 然后以第二采样速率对经滤波的样本进行插值以实现输入信号的重采样。 多相滤波提供了一个有效的高输入采样率以获得良好的频谱图像抑制，同时允许第二采样率实际上远低于第一采样率，从而降低了用于插值的乘法器操作的复杂度。

公开(公告)号：WO2008064262A3

公开(公告)日：2008-12-18

申请号：PCT/US2007085296

申请日：2007-11-20

Applicant: QUALCOMM INC ,  FILIPOVIC DANIEL F ,  KANG INYUP

Inventor： FILIPOVIC DANIEL F ,  KANG INYUP

IPC: H04B15/00 ,  H04B1/10

CPC classification number: H04B15/00 ,  H04B1/109

Abstract: In accordance with one aspect of the disclosure, apparatus are provided. A filter is provided to receive from an antenna a receive signal of a given type and a low noise amplifier is provided to amplify the received signal. A translator down translates the receive signal carried at a radio frequency to be carried at an intermediate frequency. An I/Q channel separator is provided to separate the receive signal carried at the intermediate frequency into an analog in-phase (I) signal in an I channel and an analog quadrature-phase (Q) in a Q channel. An analog-to-digital (A/D) converter is provided to respectively convert the I signal and the Q signal to digital domain representations of the I signal and the Q signal. An intermodulation (IM) distortion avoider is provided to avoid IM distortion in the receive signal. The IM distortion avoider includes a carrier frequency exchanger to exchange an IM carrier frequency of IM distortion contained in the receive signal with a carrier frequency of the receive signal.

Abstract translation: 根据本公开的一个方面，提供了装置。 提供了一种滤波器，用于从天线接收给定类型的接收信号，并且提供低噪声放大器以放大所接收的信号。 翻译器向下转换以一个中频传送的射频携带的接收信号。 提供I / Q通道分离器以将在中频载送的接收信号分离为I通道中的模拟同相（I）信号和Q通道中的模拟正交相（Q）。 提供模数（A / D）转换器以分别将I信号和Q信号转换为I信号和Q信号的数字域表示。 提供互调（IM）失真提供者以避免接收信号中的IM失真。 IM失真解除器包括载波频率交换机，用于将接收信号中包含的IM失真的IM载波频率与接收信号的载波频率进行交换。

公开(公告)号：WO2007035550A1

公开(公告)日：2007-03-29

申请号：PCT/US2006/036137

申请日：2006-09-15

Applicant: QUALCOMM INCORPORATED ,  SUBRAHMANYA, Parvathanathan ,  KANG, Inyup ,  FEI, Jia ,  SUNDARESAN, Rajesh

Inventor： SUBRAHMANYA, Parvathanathan ,  KANG, Inyup ,  FEI, Jia ,  SUNDARESAN, Rajesh

IPC: H04B1/707 ,  H04B7/08 ,  H04L25/03

CPC classification number: H04B1/71057 ,  H04B7/0669 ,  H04B7/0673 ,  H04B7/0845 ,  H04L25/03044 ,  H04L25/03292 ,  H04L2025/03509

Abstract: This disclosure describes equalization techniques for spread spectrum wireless communication. The techniques may involve estimating a channel impulse response, estimating channel variance, and selecting filter coefficients for an equalizer based on the estimated channel impulse response and the estimated channel variance. Moreover, in accordance with this disclosure, the channel variance estimation involves estimation of two or more co-variances for different received samples. Importantly, the equalizer is "fractionally spaced" which means that the equalizer defines fractional filtering coefficients (filter taps), unlike conventional equalizers that presume that filter coefficients are defined at integer chip spacing. The techniques can allow the equalizer to account for antenna diversity, such as receive diversity, transmit diversity, or possibly both.

Abstract translation: 本公开描述了用于扩频无线通信的均衡技术。 这些技术可以包括基于所估计的信道脉冲响应和所估计的信道方差估计信道脉冲响应，估计信道方差，以及为均衡器选择滤波器系数。 此外，根据本公开，信道方差估计涉及对于不同接收样本的两个或多个协方差的估计。 重要的是，均衡器是“分数间隔”的，这意味着均衡器定义分数滤波系数（滤波器抽头），不同于传统的均衡器，假设滤波器系数是以整数芯片间隔定义的。 这些技术可以允许均衡器考虑天线分集，例如接收分集，发射分集，或者可能两者。

公开(公告)号：WO2010151847A1

公开(公告)日：2010-12-29

申请号：PCT/US2010/040111

申请日：2010-06-26

Applicant: QUALCOMM INCORPORATED ,  MARRA, Thomas D. ,  LAU, Soon-Seng ,  KANG, Inyup ,  MIRBAGHERI, Arash

Inventor： MARRA, Thomas D. ,  LAU, Soon-Seng ,  KANG, Inyup ,  MIRBAGHERI, Arash

IPC: H04B1/52 ,  H04B1/04 ,  H03M3/00

CPC classification number: H04B1/525 ,  H03M1/661 ,  H04B1/0475

Abstract: A method for interference reduction is described. The method is implemented in a wireless device. It is determined that a page is going to be received via a secondary receiver. It is also determined that a digital-to-analog converter (DAC) image from a transmitter will cause interference with the secondary receiver when the page is received. A sampling frequency of the DAC for the transmitter is changed so that there are not any DAC images from the transmitter that will cause interference with the secondary receiver.

Abstract translation: 描述了一种减少干扰的方法。 该方法在无线设备中实现。 确定将通过次级接收器接收页面。 还确定，当接收到页面时，来自发射器的数模转换器（DAC）图像将引起与次级接收机的干扰。 改变发射机的DAC的采样频率，使得没有来自发射机的任何DAC图像将导致与次要接收机的干扰。

公开(公告)号：WO2008061123A3

公开(公告)日：2008-11-13

申请号：PCT/US2007084641

申请日：2007-11-14

Applicant: QUALCOMM INC ,  SHIM BYONGHYO ,  KANG INYUP ,  ABRISHAMKAR FARROKH ,  SAMBHWANI SHARAD DEEPAK

Inventor： SHIM BYONGHYO ,  KANG INYUP ,  ABRISHAMKAR FARROKH ,  SAMBHWANI SHARAD DEEPAK

IPC: H04B1/707 ,  H04L25/03

CPC classification number: H04L25/03006 ,  H04B1/71072 ,  H04L2025/03617

Abstract: Techniques for recovering a desired transmission in the presence of interfering transmissions are described. For successive equalization and cancellation (SEC), equalization is performed on a received signal to obtain an equalized signal for a first set of code channels. The first set may include all code channels for one sector, a subset of all code channels for one sector, multiple code channels for multiple sectors, etc. Data detection is then performed on the equalized signal to obtain a detected signal for the first set of code channels. A signal for the first set of code channels is reconstructed based on the detected signal. The reconstructed signal for the first set of code channels is then canceled from the received signal. Equalization, data detection, reconstruction, and cancellation are performed for at least one additional set of code channels in similar manner.

Abstract translation: 描述了在存在干扰传输的情况下恢复期望的传输的技术。 对于连续均衡和消除（SEC），对接收信号执行均衡以获得第一组码信道的均衡信号。 第一组可以包括用于一个扇区的所有码信道，用于一个扇区的所有码信道的子集，用于多个扇区的多个码信道等等。然后对均衡后的信号执行数据检测以获得用于第一组 代码通道。 基于检测到的信号重建第一组代码信道的信号。 然后从接收的信号中消除第一组代码信道的重构信号。 均衡，数据检测，重构和消除是以类似的方式对至少一个附加代码信道集合执行的。

公开(公告)号：WO2006122101A3

公开(公告)日：2006-11-16

申请号：PCT/US2006/017879

申请日：2006-05-08

Applicant: QUALCOMM INCORPORATED ,  KANG, Inyup

Inventor： KANG, Inyup

IPC: H04B1/707

Abstract: A method and apparatus for reduced acquisition time are disclosed. In one embodiment, such as in a W-CDMA system, a receiver receives one or more signals from remote stations, each signal comprising a scrambling code associated with one of a plurality of code groups, each code group identified by a unique series of a synchronization codes. A searcher identifies a subset of first synchronization codes, and a processor selects one or more hypotheses in response to the received subset. The searcher may then perform searching for a scrambling code in accordance with the one or more hypotheses. The scrambling code search may be performed in parallel with continued synchronization code searching. Various other embodiments are also disclosed.

公开(公告)号：WO2005086358A1

公开(公告)日：2005-09-15

申请号：PCT/US2005/006635

申请日：2005-02-25

Applicant: QUALCOMM INCORPORATED ,  PAN, Hanfang ,  KANG, Inyup ,  KRYSL, James

Inventor： PAN, Hanfang ,  KANG, Inyup ,  KRYSL, James

IPC: H03M13/27

CPC classification number: H03M13/2764 ,  H03M13/2703

Abstract: Embodiments disclosed herein address the need in the art for an efficient multi-symbol deinterleaver. In one aspect, a plurality of memory banks are deployed to receive and simultaneously store a plurality of values, such as soft decision values determined from a modulation constellation, in accordance with a storing pattern. In another aspect, the storing pattern comprises a plurality of cycles, a selected subset of the plurality of memory banks and an address offset for use in determining the address for storing into the respective memory banks indicated for each cycle. In yet another aspect, the stored values may be accessed in order with a sequentially increasing index, such as an address. Various other aspects are also presented. These aspects have the benefit of allowing multiple symbol values to be deinterleaved in an efficient manner, thus meeting computation time constraints, and conserving power.

Abstract translation: 本文公开的实施例解决了本领域对于有效的多符号解交织器的需要。 在一个方面，多个存储体被部署以根据存储模式来接收并同时存储多个值，诸如从调制星座确定的软判决值。 在另一方面，存储模式包括多个周期，多个存储体的选定子集和用于确定用于存储到为每个周期指示的相应存储体中的地址的地址偏移。 在另一方面，可以按顺序增加的索引（诸如地址）按顺序访问所存储的值。 还提出了各种其他方面。 这些方面具有允许以有效的方式解码多个符号值的好处，从而满足计算时间限制并节省功率。