公开(公告)号：WO2004059931A1

公开(公告)日：2004-07-15

申请号：PCT/JP2003/016521

申请日：2003-12-24

Applicant: 松下電器産業株式会社 ,  梅井 俊智 ,  勝田 昇 ,  安井 伸彦 ,  堺 貴久 ,  水口 裕二 ,  髙平 豊 ,  河田 浩嗣 ,  秋田 貴志

Inventor： 梅井 俊智 ,  勝田 昇 ,  安井 伸彦 ,  堺 貴久 ,  水口 裕二 ,  髙平 豊 ,  河田 浩嗣 ,  秋田 貴志

IPC: H04L25/49

CPC classification number: H04N21/43615 ,  H04J3/0647 ,  H04J3/085 ,  H04L7/046 ,  H04L7/06 ,  H04L7/10 ,  H04L12/42 ,  H04N21/41422 ,  H04N21/4302 ,  H04N21/4305 ,  H04N21/43632

Abstract: データ伝送装置は（１ａ）、各データ伝送装置（１ｂ～ｎ）とクロック同期をとるためのロック信号を作成して送信する。ここで、当該データ伝送装置（１ａ）は、８値マッピングされたデータによる通信を開始することを通知するためのパターン１ロック信号と、４値マッピングされたデータによる通信を開始することを通知するためのパターン２ロック信号とを発生することができる。そして、当該２種類のロック信号のいずれかが各データ伝送装置に送信される。各データ伝送装置は、いずれのロック信号を受信したのかを判定することで、トレーニング前に、データの通信方式を通知することが可能となる。

Abstract translation: 数据发送装置（1a）生成并发送与数据发送装置（1b〜n）进行时钟同步的锁定信号。 这里，数据发送装置（1a）能够生成用于通知8值映射数据的通信开始的模式1锁定信号和用于通知4值映射数据通知开始的模式2锁定信号。 两种类型的锁定信号中的一种被发送到每个数据传输设备。 每个数据传输设备判断已经接收到哪个锁定信号，并且可以在训练之前通知数据通信方法。

公开(公告)号：WO2003084119A1

公开(公告)日：2003-10-09

申请号：PCT/US2003/006259

申请日：2003-02-28

Applicant: ADVANCED MICRO DEVICES, INC.

Inventor： BOROWSKI, Jorg ,  MENNENGA, Menno ,  MENKEN, Rudiger

IPC: H04L7/02

CPC classification number: H04W56/009 ,  H04B1/70755 ,  H04L7/027 ,  H04L7/10

Abstract: A synchronization data detecting unit is provided in a communication system for detecting predetermined synchronization data. The synchronization data are sent in a transmission frame in a communication signal of the communication system. The synchronization data include a sequence of identical binary symbols which are transmitted after scrambling. The synchronization detection unit comprises a descrambler (406) for descrambling the received communication and for producing an output data sequence having multi-level signal values. The multi-level signal values of the descrambler output are smoothed in a filter unit (407). The smoothed signal is compared with a predetermined threshold value. If the smoothed signal exceeds the predefined threshold value, a detection of said synchronized data is indicated.

Abstract translation: 在用于检测预定同步数据的通信系统中提供同步数据检测单元。 在通信系统的通信信号中的发送帧中发送同步数据。 同步数据包括在加扰之后发送的相同二进制符号的序列。 同步检测单元包括用于对所接收的通信进行解扰并产生具有多电平信号值的输出数据序列的解扰器（406）。 解扰器输出的多电平信号值在滤波器单元（407）中被平滑化。 平滑信号与预定阈值进行比较。 如果平滑信号超过预定阈值，则指示所述同步数据的检测。

公开(公告)号：WO2002099962A2

公开(公告)日：2002-12-12

申请号：PCT/US2002/011877

申请日：2002-05-08

Applicant: COMSAT CORPORATION ,  FAN, Yigang ,  CHAKRAVARTHI, Prakash

Inventor： FAN, Yigang ,  CHAKRAVARTHI, Prakash

IPC: H03D1/00

CPC classification number: H04L7/041 ,  H04L7/10

Abstract: The present invention relates to burst mode digital communication systems where data transmission is preceded by a preamble for acquisition of carrier and clock synchronization using maximum likelihood (ML) principle. The preamble is sampled and the set of samples obtained is processed using the optimization algorithms of the present invention to provide the ML timing estimate. The optimization algorithms in the present invention consist of three parts. The first part deals with isolating the desired optimal estimate from non-optimal extremes satisfying the same necessary condition, and provides the initial conditions for activating the binary search schemes. The second part performs the binary search for the optimal timing estimate that guarantees the convergence. On the basis of the obtained iterative sequence, the last part constructs a more rapidly convergent sequence to obtain the ML symbol timing estimate. Using the obtained symbol timing estimate, the ML carrier phase estimate can be computed explicitly, and synchronization performed.

Abstract translation: 突发模式数字通信系统本发明涉及突发模式数字通信系统，其中数据传输之前是使用最大似然（ML）原理获取载波和时钟同步的前同步码。 对前导码进行采样，并使用本发明的优化算法来处理所获得的样本集合，以提供ML定时估计。 本发明的优化算法由三部分组成。 第一部分涉及将期望的最优估计与满足相同必要条件的非最优极值分离，并提供激活二进制搜索方案的初始条件。 第二部分执行保证收敛的最佳时序估计的二进制搜索。 在获得的迭代序列的基础上，最后一部分构建更快速的收敛序列以获得ML符号定时估计。 使用获得的符号定时估计，可以明确计算ML载波相位估计，并进行同步。

公开(公告)号：WO02006935A1

公开(公告)日：2002-01-24

申请号：PCT/US2001/022020

申请日：2001-07-13

IPC: G06F1/04 ,  G06K7/00 ,  G06K19/07 ,  H04L7/033 ,  H04L7/04 ,  H04L7/10 ,  G06F1/12

CPC classification number: G06K19/07733 ,  G06F1/04 ,  G06K7/0008 ,  G06K19/07 ,  H04L7/0331 ,  H04L7/0337 ,  H04L7/04 ,  H04L7/10

Abstract: A method and device is disclosed for generating a local clock signal CLK1X (172) from Universal Synchronous Bus downstream-received differential signals DM and DP carrying the downstream received bit-serial signal. The method and device does not require the use of a crystal or resonator. Counters (312, 310, 305, 301) are used to determine a number of periods of a free-running high frequency clock signal ((164) contained within in a known number of bit periods of the downstream received bit-serial signal (146). The counter values are divided by the known number of bit periods of the received bit-signal (146) to determine a bit period of the received bit-serial signal (146). The local clock signal (172) may be phase-locked with the received bit serial signal (146). The local clock period is updated on an ongoing manner by downstream known received traffic.

Abstract translation: 公开了用于从承载下游接收的位串行信号的通用同步总线下游接收差分信号DM和DP产生本地时钟信号CLK1X（172）的方法和装置。 该方法和装置不需要使用晶体或谐振器。 计数器（312,310,305,301）用于确定包含在下游接收位串行信号（146）的已知数量的位周期内的自由运行的高频时钟信号（（164））的周期数 计数器值除以接收到的位信号（146）的已知位数周期，以确定接收的位串行信号（146）的位周期，本地时钟信号（172）可以是相位 - 与接收到的位串行信号（146）锁定。本地时钟周期以下游已知的接收流量以持续的方式更新。

公开(公告)号：WO01065756A1

公开(公告)日：2001-09-07

申请号：PCT/US2001/001932

申请日：2001-01-22

IPC: H04B1/707 ,  H04J3/06 ,  H04L1/00 ,  H04L7/10 ,  H04K1/00

CPC classification number: H04J13/0029 ,  H04B1/707 ,  H04B1/7075 ,  H04J3/0602 ,  H04J13/10 ,  H04J13/102 ,  H04L1/0071 ,  H04L7/10

Abstract: A method of chip interleaving in direct sequence spread spectrum communications. A binary code sequence is chosen to have a length N = 2 -1 and to be self-orthogonal. A data string (40) of M = QN+1 bits, QN-1 bits, or QN+S bits, where Q is a positive integer and S is an integer between 1 and N that lacks a common factor with N, is multiplied sequentially (44) with the binary code sequence (42) until N chip frames of M chips each are produced. These chip frames are transmitted to a receiver, and recovered in an equally straightforward manner. The integers Q and N are chosen according to transmission conditions.

Abstract translation: 一种直接序列扩频通信中码片交织的方法。 选择二进制码序列具有长度N = 2k -1并且是自正交的。 M = QN + 1比特，QN-1比特或QN + S比特的数据串（40），其中Q是正整数，S是与N之间缺少公共因子的1和N之间的整数，被乘以 顺序地（44）与二进制码序列（42），直到产生每个M个码片的N个码片帧。 这些芯片帧被传送到接收机，并以同样直接的方式恢复。 根据传输条件选择整数Q和N。

公开(公告)号：WO01048972A1

公开(公告)日：2001-07-05

申请号：PCT/IL2000/000870

申请日：2000-12-28

IPC: G11C27/02 ,  H03K5/00 ,  H03K5/13 ,  H03K5/156 ,  H04L7/00 ,  H04L7/04 ,  H04L7/10

CPC classification number: G11C27/02 ,  H03K5/131 ,  H03K5/133 ,  H03K5/1565 ,  H03K2005/00058 ,  H04L7/0008 ,  H04L7/0037 ,  H04L7/042 ,  H04L7/10

Abstract: A method for sampling a data stream (22) includes receiving a segment of the data stream containing a sequence of known data, together with a source-synchronous clock signal (20), and generating a series of trial sampling clocks (60) by applying a corresponding series of different trial delays to the received clock signal The received segment of the data stream is sampled using each of the trial sampling clocks in turn to generate sampled data. The known data are compared to the sampled data to find comparison results for each of the trial sampling clocks. Responsive to the comparison results, a final delay is set, to be applied to the received clock signal so as to generate a final sampling clock for use in sampling the data stream subsequent to the segment.

Abstract translation: 一种用于采样数据流（22）的方法包括：接收包含已知数据序列的数据流的段与源同步时钟信号（20）一起，并通过应用产生一系列试用采样时钟（60） 对接收的时钟信号的相应的一系列不同的试验延迟数据流的接收段依次使用每个试验采样时钟进行采样，以生成采样数据。 将已知数据与采样数据进行比较，以找到每个试验采样时钟的比较结果。 响应于比较结果，设置最终延迟以应用于所接收的时钟信号，以便生成用于对该段之后的数据流进行采样的最终采样时钟。

公开(公告)号：WO01015375A1

公开(公告)日：2001-03-01

申请号：PCT/JP1999/004576

申请日：1999-08-25

IPC: H04J3/06 ,  H04L7/08 ,  H04L7/10 ,  H04B7/15

CPC classification number: H04L7/10 ,  H04J3/0602 ,  H04L7/08

Abstract: While continuing data communication through a communication channel, a frame is captured using a synchronous channel of a frequency different from that of the communication channel thereby to smoothly perform inter-satellite diversity and inter-satellite handover. During the period for which no data is communicated by means of a communication burst (31X) through a communication channel, a frame is captured by means of synchronous bursts (21Y, 21Z) through a synchronous channel of a different frequency. Since the synchronous bursts (21Y, 21Z) include synchronous words (23Y to 25Y, 23Z to 25Z), the timings of the synchronous words (23Y to 25Y, 23Z to 25Z) receivable during the period for which no data is communicated are increased. Alternatively, the synchronous bursts (21Y, 21Z) of the channel of the frequency which is determined for both the transmitter and receiver are transmitted/received during the period, and consequently the frame capture is smoothly carried out.

Abstract translation: 在通过通信信道进行数据通信的同时，利用与通信信道不同的频率的同步信道捕获帧，从而平滑地进行卫星间分集和卫星间切换。 在通过通信信道通过通信突发（31X）不传送任何数据的时段期间，借助同步脉冲串（21Y，21Z）通过不同频率的同步信道捕获帧。 由于同步突发（21Y，21Z）包括同步字（23Y至25Y，23Z至25Z），所以在不传送数据的期间内可以接收的同步字（23Y至25Y，23Z至25Z）的定时增加。 或者，在该周期期间发送/接收为发送器和接收器两者确定的频率的信道的同步突发（21Y，21Z），因此平滑地进行帧捕获。

公开(公告)号：WO9842079A3

公开(公告)日：1999-10-07

申请号：PCT/US9804677

申请日：1998-03-11

Applicant: I C COM LTD ,  FRIEDMAN MARK M ,  MOLEV SHTEIMAN ARKADY

Inventor： MOLEV-SHTEIMAN ARKADY

IPC: H04B1/707 ,  H04J3/06 ,  H04J13/10 ,  H04L1/00 ,  H04L7/10 ,  H04B15/00

CPC classification number: H04L1/0071 ,  H04B1/707 ,  H04J3/0602 ,  H04J13/102 ,  H04L7/10

Abstract: A method of chip interleaving in direct sequence spread spectrum communications. A binary code sequence is chosen to have a length N=2 -1 (14) and to be self-orthogonal. A data string of M=QN+/-1 bits (10 and 12), where Q is a positive integer, is multiplied sequentially with the binary code sequence until N (14) chip frames of M (10 and 12) chips each are produced. These chip frames are transmitted to a receiver, and recovered in an equally straightforward manner. The integers Q and N are chosen according to transmission conditions.

Abstract translation: 一种直接序列扩频通信中码片交织的方法。 选择二进制码序列具有长度N = 2k -1（14）并且是自正交的。 M = QN +/- 1位（10和12）的数据串（10和12），其中Q是正整数，与二进制码序列顺序相乘，直到产生M（10和12）码片的N（14）个码片帧 。 这些芯片帧被传送到接收机，并以同样直接的方式恢复。 根据传输条件选择整数Q和N。

公开(公告)号：WO99018701A1

公开(公告)日：1999-04-15

申请号：PCT/US1998/012735

申请日：1998-06-18

IPC: H04L27/34 ,  H04L1/00 ,  H04L7/04 ,  H04L7/10 ,  H04L12/56 ,  H04L27/00 ,  H04L29/10 ,  H04M11/00 ,  H04M11/06 ,  H04Q3/42 ,  H04L1/12

CPC classification number: H04L1/0057 ,  H04L1/0002 ,  H04L1/0021 ,  H04L7/048 ,  H04L7/10 ,  H04L27/0002 ,  H04L47/10 ,  H04M11/062 ,  Y02D50/10

Abstract: A digital subscriber line communication system does not require the use of a plain old telephone service (POTS) splitter in the resident's home. Digital signal processing techniques are utilized to adapt to varying subscriber line conditions due to POTS telephone equipment. The digital signal processing techniques eliminate the need for a splitter by reducing susceptibility to distortion due to varying subscriber line characteristics. The digital subscriber line modem utilizes quadrature amplitude modulated (QAM) signals and frequency division multiplexing. The digital subscriber line modem includes a control circuit which includes a rapid retrain circuit. The rapid retrain circuit can retrain the digital subscriber line modem in less than 0.5 seconds.

Abstract translation: 数字用户线路通信系统不需要在居民的家中使用普通老式电话服务（POTS）分离器。 利用数字信号处理技术来适应由POTS电话设备引起的不同用户线路状况。 数字信号处理技术通过减少由于不同的用户线路特性引起的失真的敏感性而消除对分路器的需要。 数字用户线路调制解调器利用正交幅度调制（QAM）信号和频分复用。 数字用户线路调制解调器包括一个控制电路，它包括一个快速的再训练电路。 快速重新训练电路可以在0.5秒以内重新训练数字用户线调制解调器。

公开(公告)号：WO98047245A1

公开(公告)日：1998-10-22

申请号：PCT/JP1998/001682

申请日：1998-04-13

IPC: H04L7/00 ,  H04B1/16 ,  H04B7/26 ,  H04L7/10

CPC classification number: H04B1/1615 ,  H04L7/0083 ,  H04L7/10 ,  H04W52/0216 ,  Y02D70/40

Abstract: A method for controlling communication of mobile equipment in which the power consumed by the repetition of useless asynchronous reception for establishing synchronization can be reduced. The control unit (5) of a mobile station which is the mobile equipment controls the duration of asynchronous reception stopping time elapsed until asynchronous reception is again started after the asynchronous reception is temporarily stopped for synchronization establishing so that the duration can be extended in accordance with the number of continuous synchronization establishment failures or the time continuously elapsed from a failure, when the synchronization establishment between the mobile station and a base station has continuously failed.

Abstract translation: 一种用于控制移动设备的通信的方法，其中可以减少重复用于建立同步的无用异步接收所消耗的功率。 作为移动设备的移动台的控制单元（5）控制异步接收停止时间的持续时间，直到异步接收再次开始，异步接收被暂时停止以用于同步建立，使得持续时间可以根据 当移动台和基站之间的同步建立连续失败时，连续同步建立失败的次数或从故障持续经过的时间。