公开(公告)号：US07260139B2

公开(公告)日：2007-08-21

申请号：US10274916

申请日：2002-10-22

Applicant: Eitan Tene ,  Dotan Sokolov

Inventor： Eitan Tene ,  Dotan Sokolov

IPC: H04B1/00

CPC classification number: H04B1/707 ,  H04B1/7115 ,  H04B2201/70707

Abstract: A method and apparatus for reducing an amount of bits of data at at least two stages of data transfer in a communications reception data path between a rake receiver and a channel decoder.

Abstract translation: 一种用于在耙式接收机和信道解码器之间的通信接收数据路径中的数据传输的至少两个阶段减少数据位数量的方法和装置。

公开(公告)号：US07248623B2

公开(公告)日：2007-07-24

申请号：US10099536

申请日：2002-03-14

Applicant: John H. Oates

Inventor： John H. Oates

IPC: H04B1/00

CPC classification number: H04B1/71052 ,  H04B1/707 ,  H04B1/7093 ,  H04B1/7105 ,  H04B1/71075 ,  H04B1/7115 ,  H04B2201/70707 ,  H04B2201/70711

Abstract: The invention provides methods and apparatus for multiple user detection (MUD) processing that have application, for example, in improving the capacity CDMA and other wireless base stations. One aspect of the invention provides a multiprocessor, multiuser detection system for detecting user transmitted symbols in CDMA short-code spectrum waveforms. A first processing element generates a matrix (hereinafter, “gamma matrix”) that represents a correlation between a short-code associated with one user and those associated with one or more other users. A set of second processing elements generates, e.g., from the gamma matrix, a matrix (hereinafter, “R-matrix”) that represents cross-correlations among user waveforms based on their amplitudes and time lags. A third processing element produces estimates of the user transmitted symbols as a function of the R-matrix.

Abstract translation: 本发明提供了用于多用户检测（MUD）处理的方法和装置，其具有例如在改进容量CDMA和其它无线基站中的应用。 本发明的一个方面提供一种用于在CDMA短码频谱波形中检测用户发送符号的多处理器，多用户检测系统。 第一处理元件生成表示与一个用户相关联的短码与与一个或多个其他用户相关联的短码之间的相关性的矩阵（以下称为“伽马矩阵”）。 一组第二处理元件例如从伽马矩阵生成基于它们的幅度和时间滞后的用户波形之间的互相关的矩阵（以下称为“R矩阵”）。 第三处理单元产生作为R矩阵的函数的用户发送符号的估计。

公开(公告)号：US20070143078A1

公开(公告)日：2007-06-21

申请号：US10680833

申请日：2003-10-07

Applicant: Martin Vetterli ,  Pina Marziliano ,  Thierry Blu

Inventor： Martin Vetterli ,  Pina Marziliano ,  Thierry Blu

IPC: G06F15/00

CPC classification number: H04B1/707 ,  H03M1/1285 ,  H03M1/66 ,  H04B2201/70707

Abstract: Reconstruction method for reconstructing a first signal (x(t)) regularly sampled at a sub-Nyquist rate, comprising the step of retrieving from the regularly spaced sampled values (ys[n], y(nT)) a set of weights (cn, cnr, ck) and shifts (tn, tk) with which said first signal (x(t)) can be reconstructed. The reconstructed signal (x(t)) can be represented as a sequence of known functions (γ(t)) weighted by the weigths (ck) and shifted by the shifts (tk). The sampling rate is at least equal to the rate of innovation (ρ) of the first signal (x(t)).

Abstract translation: 一种用于重新构造以次奈奎斯特速率规则采样的第一信号（x（t））的重构方法，包括从规则间隔的采样值（y N s [n]，y（n T ））一组权重（c N，N，C，N，C，C），并且移位（t N n， 可以重构所述第一信号（x（t））。 重构信号（x（t））可以表示为由重量（c）k N加权并且移位了移位（t≠k）的已知函数（gamma（t））的序列 ）。 采样率至少等于第一个信号（x（t））的创新速率（rho）。

公开(公告)号：US07209461B2

公开(公告)日：2007-04-24

申请号：US09852436

申请日：2001-05-09

Applicant: Avneesh Agrawal ,  Jeremy H. Lin

Inventor： Avneesh Agrawal ,  Jeremy H. Lin

IPC: H04B7/216

CPC classification number: H04B1/7117 ,  H04B1/7115 ,  H04B2201/70707

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.

Abstract translation: 公开了以硬件有效的方式增加手指解调能力的技术。 在一个方面，I和Q样本被移入并行可访问的移位寄存器。 从移位寄存器访问多个芯片样本，并行操作，以产生每个周期的信道的多芯片结果。 这些多芯片结果可以被累加并输出到符号边界上的符号速率处理器。 可以调度移位寄存器访问，计算和累加的调度，使得硬件是时分的，以支持大量信道。 在另一方面，可以通过针对移位寄存器文件的内容的特定索引来容纳大量信道的时间跟踪。 这些方面以及还提出了各种其他方面，为大量渠道提供硬件高效的芯片速率处理能力，在这些频道的部署方面具有高度的灵活性。

公开(公告)号：USRE39540E1

公开(公告)日：2007-04-03

申请号：US10691432

申请日：2003-10-23

Applicant: Dotan Sokolov ,  David Ben-Eli

Inventor： Dotan Sokolov ,  David Ben-Eli

IPC: H04B1/69

CPC classification number: H04B1/70775 ,  H04B1/70756 ,  H04B1/708 ,  H04B1/709 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70707

Abstract: A searcher for a mobile station of a cellular telephony network. Pilot signal from nearby base stations are correlated with a pseudonoise sequence inside a search window, using a bank of correlators. Each correlator is assigned a different delay, from among a sequence of delays in the window. At each delay, correlation is performed initially for a first dwell time. If the resulting correlation value exceeds a threshold, the correlation is continued for a second dwell time. Otherwise, the correlator is set to the next delay in the sequence. Only the outputs of second dwell correlations are used to identify the nearest base station. Some correlators may perform first dwell correlations at new delays in the window at the same time that other correlators are still performing second dwell correlations at old delays in the window.

Abstract translation: 用于蜂窝电话网络的移动台的搜索器。 使用一组相关器，来自附近基站的导频信号与搜索窗口内的伪噪声序列相关。 从窗口中的延迟序列中分配每个相关器不同的延迟。 在每个延迟下，首先在第一停留时间执行相关性。 如果所得到的相关值超过阈值，则相关性继续进行第二停留时间。 否则，相关器被设置为序列中的下一个延迟。 仅使用第二停留相关的输出来识别最近的基站。 一些相关器可以在窗口中的新延迟处执行第一暂停相关，同时其他相关器仍然在窗口中的旧延迟中执行第二驻留相关性。

公开(公告)号：US07174356B2

公开(公告)日：2007-02-06

申请号：US10602951

申请日：2003-06-24

Applicant: Gregory Agami ,  Ronald Rotstein

Inventor： Gregory Agami ,  Ronald Rotstein

IPC: G06F7/52

CPC classification number: H04B1/707 ,  G06F7/4812 ,  H04B2201/70706 ,  H04B2201/70707

Abstract: A method and apparatus for complex multiplication includes steps of: (a) receiving a complex multiplicand having a real value and an imaginary value (704); (b) generating a negation of the real value of the complex multiplicand (706); (c) generating a negation of the imaginary value of the complex multiplicand (708); (d) receiving a complex multiplier (710); and (e) selecting a phasor constant having a value wherein a complex product of the complex multiplicand times the complex multiplier times the phasor constant has a real value equal to one of the real value of the complex multiplicand, the imaginary value of the complex multiplicand, the negation of the real value of the complex multiplicand, and the negation of the imaginary value of the complex multiplicand (712).

Abstract translation: 复数乘法的方法和装置包括以下步骤：（a）接收具有实数值和虚数值的复数被乘数（704）; （b）产生复数被乘数的实数值的否定（706）; （c）产生复数被乘数的虚数值的否定值（708）; （d）接收复数乘法器（710）; 和（e）选择具有其复数乘数乘以相量常数的复乘乘数乘以复数被乘数之一的实数值的复数乘数的复数乘数的相量常数，复乘数的虚数值 ，复数被乘数的实数值的否定以及复数被乘数的虚数值的否定（712）。

公开(公告)号：US07139306B2

公开(公告)日：2006-11-21

申请号：US10099543

申请日：2002-03-14

Applicant: John H. Oates

Inventor： John H. Oates

IPC: H04B1/69

CPC classification number: H04B1/71052 ,  H04B1/707 ,  H04B1/7093 ,  H04B1/7105 ,  H04B1/71075 ,  H04B1/7115 ,  H04B2201/70707 ,  H04B2201/70711

Abstract: The invention provides improved CDMA, WCDMA (UTMS) or other spread spectrum communication systems of the type that processes one or more spread-spectrum waveforms, each representative of a waveform received from a respective user (or other transmitting device). The improvement is characterized by a first logic element that generates a residual composite spread-spectrum waveform as a function of an arithmetic difference between a composite spread-spectrum waveform for all users (or other transmitters) and an estimated spread-spectrum waveform for each user. It is further characterized by one or more second logic elements that generate, for at least a selected user (or other transmitter), a refined spread-spectrum waveform as a function of a sum of the residual composite spread-spectrum waveform and the estimated spread-spectrum waveform for that user.

公开(公告)号：US07133467B2

公开(公告)日：2006-11-07

申请号：US10148289

申请日：2001-09-27

Applicant: Akihiko Nishio ,  Hideo Fujii ,  Masaki Hayashi

Inventor： Akihiko Nishio ,  Hideo Fujii ,  Masaki Hayashi

IPC: H04L27/06

CPC classification number: H04B1/7105 ,  H04B2201/70707

Abstract: The number of spreading codes multiplexed in a received signal is detected, and switches 4 and 5 are switched to the RAKE demodulation section 2 side if the detected number of spreading codes is less than a predetermined threshold value, and to the JD demodulation section 3 side if greater than or equal to the predetermined threshold value. As a result, joint detection demodulation is used only when the number of multiplexed spreading codes is large—that is, when the number of users is large—and consequently power can be saved during demodulation.

Abstract translation: 检测到在接收信号中多路复用的扩展码的数量，如果检测到的扩展码数小于预定阈值，则将开关4和5切换到RAKE解调部分2侧，并且向JD解调部分3侧 如果大于或等于预定阈值。 结果，仅当多路复用扩展码的数量大时，即当用户数量大时才使用联合检测解调，并且因此在解调期间可以节省功率。

公开(公告)号：US07133464B2

公开(公告)日：2006-11-07

申请号：US09769688

申请日：2001-01-25

Applicant: Takashi Mochizuki

Inventor： Takashi Mochizuki

IPC: H04L25/49

CPC classification number: H04B1/7097 ,  H04B1/0475 ,  H04B1/62 ,  H04B2201/70707 ,  H04B2201/709709 ,  H04L25/03866

Abstract: A transmission apparatus includes a filter, multiplier, and controller. The filter reduces leakage power outside the transmission signal band. In the filter, a first attenuation amount more than a predetermined amount or a second attenuation amount not more than the predetermined amount is selectively set in a range higher than the transmission signal band. The multiplier modulates the transmission signal output from the filter. The controller sets one of the first and second attenuation amounts in the filter in accordance with the use situation of a band adjacent to the transmission signal band.

Abstract translation: 传输装置包括滤波器，乘法器和控制器。 滤波器可以减少传输信号频带以外的泄漏功率。 在滤波器中，选择性地设定大于预定量的第一衰减量或不超过预定量的第二衰减量在高于发送信号频带的范围内。 乘法器调制从滤波器输出的传输信号。 控制器根据与发送信号频带相邻的频带的使用情况，设置滤波器中的第一衰减量和第二衰减量之一。

公开(公告)号：US20060246837A1

公开(公告)日：2006-11-02

申请号：US10540692

申请日：2003-12-29

Applicant: Jingxin Liang ,  Zhiyu Zhang ,  Xiaojun Yin

Inventor： Jingxin Liang ,  Zhiyu Zhang ,  Xiaojun Yin

IPC: H04H1/00 ,  H04B1/00

CPC classification number: H04B1/71052 ,  H04B2201/70707

Abstract: A simplified de-correlation method in CDMA multi-user detection comprises: a. receive wireless symbols S; b. obtain a channel correlation matrix R, take a part from R to get a partial correlation matrix RP; c. do inversion operation to the partial correlation matrix RP, then obtain matrix V(m); d. recover original data symbols D from received symbols S by V(m) that the location of original data symbols D corresponds to.

Abstract translation: CDMA多用户检测中的简化去相关方法包括：a。 接收无线符号S; b。 获得信道相关矩阵R，从R中获得部分相关矩阵R P; C。 对部分相关矩阵R P0进行反转操作，然后获得矩阵V（m） d。 从原始数据符号D的位置对应于从接收符号S通过V（m）恢复原始数据符号D。