公开(公告)号：WO2004010573A1

公开(公告)日：2004-01-29

申请号：PCT/US2003/022652

申请日：2003-07-18

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： KWAK, Jaeyoung ,  PAN, Jung-Lin ,  ZEIRA, Ariela

IPC: H03D1/04

CPC classification number: H04B1/71055 ,  H04B1/7093 ,  H04B1/71072 ,  H04B7/0854 ,  H04L1/06 ,  H04L25/0212 ,  H04L25/0226 ,  H04L25/03305 ,  H04L25/03318

Abstract: A plurality of data signals are received over an antenna array having a plurality of antenna elements. The data singals are transmitted over a shared spectrum in a wireless communication system. A signal having each of the data signals is received over each antenna element. The plurality of data signals are grouped into a plurality of groups. The received signals of the antenna elements are matched filtered (70) for a first group of the plurality of groups, producing a matched filtered result. Data is jointly detected of the first group using the matched filtered result. An interference correction signal is constructed (76) using the detected data for each antenna element. The interference cancelled result is subtracted (92) from the received signal of each antenna element, producing an interference cancelled result for each antenna element. Data is successively detected for remaining groups using the interference cancelled result for each antenna element.

Abstract translation: 通过具有多个天线元件的天线阵列接收多个数据信号。 在无线通信系统中通过共享频谱传输数据信号。 在每个天线元件上接收具有每个数据信号的信号。 多个数据信号被分组成多个组。 天线元件的接收信号对于多个组中的第一组进行匹配滤波（70），产生匹配的滤波结果。 使用匹配的过滤结果联合检测第一组的数据。 使用每个天线元件的检测数据构造干扰校正信号（76）。 从每个天线元件的接收信号中减去干扰消除结果（92），产生每个天线元件的干扰消除结果。 使用每个天线元件的干扰消除结果对剩余组连续检测数据。

公开(公告)号：WO2003107534A1

公开(公告)日：2003-12-24

申请号：PCT/US2003/018593

申请日：2003-06-12

Applicant: BERMAI, INC.

Inventor： KIM, Younggyun ,  MOON, Jaekjun

IPC: H03H7/30

CPC classification number: H04B1/71057 ,  H04B1/7093 ,  H04B2201/709709 ,  H04J11/0033 ,  H04L23/02 ,  H04L25/03057 ,  H04L25/03267 ,  H04L2025/03375 ,  H04L2025/03503 ,  H04L2027/0042

Abstract: Demodulation techniques for a wireless communication system make use of a decision feedback equalization (DFE) technique to mitigate the effects of multipath channel characteristics on receiver performance. The techniques may be particularly useful in the demodulation of complementary code keying (CCK) symbols. A demodulator that performs such techniques may include a time-variant or time-invariant matched filter (70), a feedback intersymbol interference (ISI) canceller (78), a transform unit (72), a phase rotation estimator and corrector (76), a pattern-dependent bias canceller (80, 81, 82), and a maximum picker (84) for symbol decisions (86). The transform unit may include a bank of correlators, or alternatively a fast Walsh transform unit.

Abstract translation: 无线通信系统的解调技术利用判决反馈均衡（DFE）技术来减轻多径信道特性对接收机性能的影响。 这些技术在解码补码编码（CCK）符号中可能特别有用。 执行这种技术的解调器可以包括时变或时不变匹配滤波器（70），反馈符号间干扰（ISI）消除器（78），变换单元（72），相位旋转估计器和校正器（76） ，模式相关偏移消除器（80,81,82）和用于符号决定（86）的最大选择器（84）。 变换单元可以包括一组相关器，或者可以包括快速沃尔什变换单元。

公开(公告)号：WO0239611A3

公开(公告)日：2003-12-11

申请号：PCT/US0147367

申请日：2001-11-03

Applicant: QUALCOMM INC

Inventor： BUTLER BRIAN K ,  MOHSENI JAFAR M ,  JOHN DEEPU ,  ZHANG HAITAO

IPC: H04J13/10 ,  H04B1/707 ,  H04B1/7093

CPC classification number: H04B1/7093 ,  H04B1/707

Abstract: A spreading system according to an embodiment of the invention spreads two data signals. The system produces a filtered signal that is based on one of the data signals and an output signal that is based on both of the data signals. In one example, a spreading system is used to perform QPSK spreading of two data signals, including separate processing of the two data signals, in a practical manner. Such separate control may include filtering and/or gain control.

Abstract translation: 根据本发明的实施例的扩展系统扩展了两个数据信号。 系统产生基于数据信号之一的滤波信号和基于两个数据信号的输出信号。 在一个示例中，扩展系统用于以实用的方式执行两个数据信号的QPSK扩展，包括两个数据信号的单独处理。 这种单独的控制可以包括滤波和/或增益控制。

公开(公告)号：WO2003032512A1

公开(公告)日：2003-04-17

申请号：PCT/US2002/032470

申请日：2002-10-10

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： DEMIR, Alpaslan ,  OZLUTURK, Fatih, M.

IPC: H04B1/69

CPC classification number: H04B1/708 ,  H04B1/70735 ,  H04B1/7077 ,  H04B1/7093 ,  H04B2201/7071

Abstract: A User Equipment (UE) has as circuit that performs the acquisition for the low chip rate option of the Universal Mobile Telecommunication System (UMTS) Time Division Duplex (TDD) standard as formulated by the Third Generation Partnership Project (3GPP). The present invention implements the detection (10) of the basic SYNC code; the determination (20) of the midamble used and the detection (30) of the superframe timing based on SYNC code modulation sequence. This enables reading of a full Broadcast Channel (BCH) message.

Abstract translation: 用户设备（UE）具有执行由第三代合作伙伴计划（3GPP）制定的通用移动电信系统（UMTS）时分双工（TDD）标准的低码片速率选项的获取的电路。 本发明实现了基本SYNC码的检测（10） 所使用的中间码的确定（20）和基于SYNC码调制序列的超帧定时的检测（30）。 这使得能够读取完整的广播信道（BCH）消息。

公开(公告)号：WO2003028399A1

公开(公告)日：2003-04-03

申请号：PCT/JP2002/009784

申请日：2002-09-24

Applicant: 松下電器産業株式会社 ,  高橋 秀行 ,  北川 恵一 ,  芳賀 宏貴 ,  林 真樹 ,  平松 勝彦

Inventor： 高橋 秀行 ,  北川 恵一 ,  芳賀 宏貴 ,  林 真樹 ,  平松 勝彦

IPC: H04Q7/38

CPC classification number: H04B1/7075 ,  H04B1/70735 ,  H04B1/70775 ,  H04B1/7083 ,  H04B1/7093 ,  H04B2201/70702

Abstract: A synchronization code identification and a synchronization timing detection are performed in two stages. In a first stage of processes ST1 to ST7, according to a rough correlation between a reception signal and a candidate synchronization code, the synchronization code or the synchronization timing are roughly decided or one of them is accurately calculated. In a second stage of processes ST8 to ST12, an accurate synchronization code identification and synchronization timing detection are performed.

Abstract translation: 同步码识别和同步定时检测分两个阶段进行。 在处理ST1至ST7的第一阶段，根据接收信号和候选同步码之间的粗略的相关性，粗略地确定同步码或同步定时，或者精确地计算其中之一。 在处理ST8至ST12的第二阶段中，执行精确的同步码识别和同步定时检测。

公开(公告)号：WO2003015305A1

公开(公告)日：2003-02-20

申请号：PCT/US2002/024702

申请日：2002-08-06

Applicant: ANALOG DEVICES, INC.

Inventor： RIFAAT, Rasekh ,  GREENFIELD, Zvi ,  FRIDMAN, Jose

IPC: H04B1/707

CPC classification number: H04B1/7093

Abstract: A digital signal processor performs despread decoding in wireless telephone systems. Orthogonal codes are used to combine data signals into one overall coded signal which is transmitted. The orthogonal codes are used to retrieve individual data signals from the transmitted overall coded signal. Despread instructions are included in the digital signal processor functionality.

Abstract translation: 数字信号处理器在无线电话系统中执行解扩解码。 正交码用于将数据信号组合成一个发送的总编码信号。 正交码用于从发送的总体编码信号中检索单个数据信号。 解扩指令包括在数字信号处理器功能中。

公开(公告)号：WO2002089349A1

公开(公告)日：2002-11-07

申请号：PCT/IB2002/001423

申请日：2002-04-22

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventor： WHIGHT, Kenneth, R.

IPC: H04B1/707

CPC classification number: H04B1/7093 ,  G01S11/08 ,  H04B1/70757

Abstract: A method of detecting, and a receiver for, a spread spectrum signal, in which a chip sequence is sampled (110) and filtered in a matched filter (120), the output of the filter is averaged (130) over respective samples of successive chip sequences, sub-samples are determined (180) by interpolating between the averaged samples, and the position of the chip sequence in the spread spectrum signal is determined (170) by determining the position of closest match between the sub-samples and samples taken at the same interval from a reference correlation function (160) of the chip sequence. The time of arrival of the spread spectrum signal may be determined by comparison of the position of the chip sequence, or an average of more than one such position, with a time reference. The position of closest match may be determined by correlation.

Abstract translation: 一种用于检测和扩展频谱信号的接收机的方法，其中码片序列被采样（110）并在匹配滤波器（120）中滤波），滤波器的输出在连续的各个样本上被平均化（130） 通过在平均采样之间进行插值来确定（180）子样本，并且通过确定子采样和采样采样之间最接近匹配的位置来确定扩频信号中的码片序列的位置（170）（170） 以与芯片序列的参考相关函数（160）相同的间隔。 扩频信号的到达时间可以通过将码片序列的位置或多于一个这样的位置的平均值与时间参考进行比较来确定。 最接近匹配的位置可以通过相关来确定。

公开(公告)号：WO02073937A3

公开(公告)日：2002-11-07

申请号：PCT/US0208106

申请日：2002-03-14

Applicant: MERCURY COMP SYSTEMS INC

Inventor： OATES JOHN H

IPC: H04B1/707 ,  H04B15/00 ,  H04K1/00 ,  H04L27/00

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 or other spread-spectrum communication systems of the type (fig. 1) that processes one or more spread-spectrum waveforms, each representative of a waveform received from a respective user. The improvement is characterized by a first logic element (100) that generates a residual composite spread-spectrum waveform (112) as a function of an arithmetic difference between a composite spread-spectrum waveform for all users and an estimated spread-spectrum waveform for each user. It is further characterized by one or more second logic elements (118, 120) that generates for at least a selected user, 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.

Abstract translation: 本发明提供了处理一个或多个扩频波形的类型（图1）类型的改进的CDMA，WCDMA或其他扩频通信系统，每个扩频波形表示从相应用户接收的波形。 该改进的特征在于，产生作为所有用户的复合扩频波形之间的算术差异的函数的残差复合扩频波形（112）的第一逻辑元件（100）和用于所有用户的估计扩频波形 用户。 其进一步的特征在于为至少选择的用户产生的一个或多个第二逻辑元件（118,120），作为残差复合扩频波形和估计扩展频谱波形之和的函数的精细扩频波形， 该用户的频谱波形。

公开(公告)号：WO02033859A1

公开(公告)日：2002-04-25

申请号：PCT/US2000/041183

申请日：2000-10-17

IPC: H04B1/707 ,  H04B15/00 ,  H04K1/00 ,  H04L27/30

CPC classification number: H04B1/7075 ,  H04B1/7093

Abstract: In simultaneous reception of overlapping signals (61) sharing a single spreading sequence, packet start times (135) are found by separately demodulating, low pass filtering and despreading in-phase and quadrature components. Despread in-phase and quadrature signals are provided to synchronization filters (103, 105, 113, 115) connected in parallel and arranged in two identical pairs. Outputs from filters in different pairs are added, and the sums are squared. The squared signals are added. An exceeded threshold of the output from the last adder (129) decilitates a packet start. Knowing packet start times facilitates separating the overlapping inbound signals.

Abstract translation: 在共享单个扩展序列的重叠信号（61）的同时接收中，通过单独解调低通滤波和解扩同相和正交分量来找到分组开始时间（135）。 解扩的同相和正交信号被提供给并联连接并以两个相同的对布置的同步滤波器（103,105,113,115）。 添加来自不同对的滤波器的输出，并且这些和是平方的。 加上平方信号。 来自最后一个加法器（129）的输出的超出阈值使分组开始衰减。 知道分组开始时间有助于分离重叠的入站信号。

公开(公告)号：WO0057569A9

公开(公告)日：2001-11-15

申请号：PCT/US0007774

申请日：2000-03-22

Applicant: TEXAS INSTRUMENTS INC

Inventor： SRIRAM SUNDARARAJAN ,  HOSUR SRINATH

IPC: H04B1/707

CPC classification number: H04B1/70752 ,  H04B1/70735 ,  H04B1/7077 ,  H04B1/7093 ,  H04B2201/70702 ,  H04B2201/70707

Abstract: A circuit for detecting a serial signal comprises a first circuit (400) coupled to receive the serial signal (200) during a predetermined plurality of time periods of substantially equal duration. The first circuit is coupled to receive a first code (414). The first circuit is arranged to compare a part of the serial signal corresponding to each time period of the plurality of time periods to the first code, thereby producing a match signal. The first circuit accumulates the match signal from each of the each time period of the plurality of time periods.

Abstract translation: 用于检测串行信号的电路包括第一电路（400），该第一电路被耦合以在基本相等的持续时间的预定多个时间段内接收串行信号（200）。 第一电路被耦合以接收第一代码（414）。 第一电路被布置为将与多个时间段的每个时间段相对应的串行信号的一部分与第一代码进行比较，从而产生匹配信号。 第一电路从多个时间段的每个时间段的每一个累加匹配信号。