公开(公告)号：WO1998013968A1

公开(公告)日：1998-04-02

申请号：PCT/US1997016935

申请日：1997-09-19

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  YANG, Jian

IPC: H04L07/02

CPC classification number: H04L7/0054 ,  H04L7/0062

Abstract: In a data receiver (18) which periodically samples at predefined sample points a received analog signal and produces therefrom a digital output, an adaptive self-noise cancellation timing recovery circuit (26) includes: a self-noise canceller (44), responsive to the samples and the digital output, for adaptively approximating the self-noise component of the samples and for removing the approximated self-noise component from the samples to produce substantially self-noise free samples; a timing error generator (42), responsive to the self-noise free samples and the digital output, for generating a timing error signal proportional to sampling deviations from the predefined sample points of the data receiver; and a control device (40), responsive to the timing error signal, for controlling the sampling phase of the data receiver to eliminate the sampling deviations.

Abstract translation: 一种自适应自噪声消除定时恢复电路（26）包括：自噪声消除器（44），响应于所述数据接收器（18） 样本和数字输出，用于自适应地近似样本的自噪声分量并从样本中去除近似的自噪声分量以产生基本上无噪声的样本; 定时误差发生器（42），响应于无噪声样本和数字输出，用于产生与数据接收机的预定采样点的采样偏差成比例的定时误差信号; 以及响应于定时误差信号的控制装置（40），用于控制数据接收器的采样相位以消除采样偏差。

公开(公告)号：WO1997010553A1

公开(公告)日：1997-03-20

申请号：PCT/US1996013884

申请日：1996-08-29

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  EYUBOGLU, M., Vedat ,  YANG, Jian

IPC: G06F17/10

CPC classification number: H04B1/1036 ,  H04L25/03038 ,  H04L25/03057 ,  H04L2025/03477 ,  H04L2025/03496

Abstract: The present invention provides a device and method in multi-access communications system for reliably receiving burst transmissions from users in the presence of narrow band interference. The adaptive interference suppreser incorporates adaptive elements that are updated using a predetermined adaptation algorithm. These adaptive elements are stored in memory at the end of the burst transmission for reuse in receiving a next burst transmission.

Abstract translation: 本发明提供了一种多接入通信系统中的设备和方法，用于在存在窄带干扰的情况下可靠地接收来自用户的突发传输。 自适应干扰抑制器包括使用预定的自适应算法更新的自适应元件。 这些自适应元件在突发传输结束时存储在存储器中，以便在接收下一个突发传输时重新使用。

公开(公告)号：WO1996003831A1

公开(公告)日：1996-02-08

申请号：PCT/US1995002527

申请日：1995-02-28

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  NG, Dennis ,  YANG, Jian ,  EYUBOGLU, M., Vedat

IPC: H04M11/00

CPC classification number: H04N7/147 ,  H04M3/567 ,  H04M3/568 ,  H04N7/15 ,  H04N7/152 ,  Y10S379/908

Abstract: Multipoint control units (902) are networked utilizing a predetermined number of mixing operations such that delay is reduced while maintaining overall quality. The present invention provides an advantageous system (200) by also substantially reducing communication costs by utilizing efficient networking.

Abstract translation: 使用预定数量的混合操作联网多点控制单元（902），从而在保持整体质量的同时降低延迟。 本发明还通过利用有效的组网来大幅降低通信成本，提供了有利的系统（200）。

公开(公告)号：WO1996019882A1

公开(公告)日：1996-06-27

申请号：PCT/US1995014637

申请日：1995-10-26

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  YONG, Mei ,  YANG, Jian ,  NG, Dennis

IPC: H04J03/16

CPC classification number: H04N21/2365 ,  H04J3/247 ,  H04L29/06 ,  H04N21/23406 ,  H04N21/2385 ,  H04N21/2665

Abstract: The present invention provides a method (900) and device (100) in multimedia communication systems for efficiently segmenting information bitstreams from multiple media sources into variable length packets, and multiplexing and sending the packets to a shared communication link with low delay and low overhead. The packet segmentation and multiplexing are performed dynamically based on fullness of a set of information buffers that contain the information bitstreams to be transmitted, and delay-sensitivity of each information bitstream. The multi-discipline queuing scheme has been developed in this invention to control the dynamic packet segmenting and multiplexing process.

Abstract translation: 本发明提供了一种多媒体通信系统中的方法（900）和装置（100），用于将信息比特流从多个媒体源有效地分段为可变长度分组，并以低延迟和低开销复用并发送到共享通信链路。 基于包含要发送的信息比特流的一组信息缓冲器的丰满度以及每个信息比特流的延迟敏感度来动态地执行分组分段和多路复用。 本发明已经开发了多学科排队方案来控制动态分组分组和复用过程。

公开(公告)号：WO2001017154A3

公开(公告)日：2001-03-08

申请号：PCT/US2000/022631

申请日：2000-08-17

Applicant: MOTOROLA INC.

Inventor： YANG, Jian

IPC: H03M13/00

Abstract: During encoding, a microprocessor (201) calculates Y m by standard Reed-Solomon encoding techniques. The microprocessor (201) then utilizes Y m as an index to a look-up table (203), and is returned G o Y m , G 1 Y m , ..., G K-1 Y m , from the look-up table (203). During syndrome calculation, a second set of parity symbols are generated from the information symbols using the method similar to the encoder, in particular, values for G o Y m , ..., G K-1 Y m are obtained from a first look-up table (503) in a similar manner as encoder to determine the values for G o Y m , G 1 Y m , ..., G K-1 Y m . A second look-up table (505) is set up to determine roots of the error locator polynomial. The second look-up table consists of several tables and each table contains (Q-1) elements, where Q is the size of the GF(Q) field. The mth look-up table stores Galois Field element α -mi at location i if the greatest common denominator between (Q-1) and m (GCD(Q-1,m))=1. If GCD(Q-1,m) ≠1, then the mth look-up table actually consists of (GCD(Q-1,m)) sub-tables storing GF element α -(mi+j) , where j=0, 1, ..., GCD(Q-1,m)-1.

公开(公告)号：EP1068706A1

公开(公告)日：2001-01-17

申请号：EP99916577.2

申请日：1999-04-09

Applicant: MOTOROLA, INC.

Inventor： KSCHISCHANG, Frank, Robert ,  NARULA, Aradhana ,  YANG, Jian

IPC: H04L27/04

CPC classification number: H04L27/2614 ,  H04L27/2602 ,  H04L27/3411

Abstract: In a transmitter (10) for transmitting data in blocks over a channel to a receiver (19), a device for improving a defined property of transform-domain symbols, the device, including: a signal mapper (12) which maps the input data into blocks of symbols in a first domain; wherein each of the symbols is chosen from a base constellation contained in an expanded constellation having expansion symbols, and wherein at least some of the symbols in the base constellation have one or more corresponding expansion symbols; and a perturbation transform device (14 and 16), responsive to the blocks of symbols, which produces for each block of symbols in the first domain a block of perturbed transform-domain symbols in order to improve a defined property of the transform-domain symbols.

公开(公告)号：EP1400022A2

公开(公告)日：2004-03-24

申请号：EP00957537.4

申请日：2000-08-17

Applicant: MOTOROLA, INC.

Inventor： YANG, Jian

IPC: H03M13/00 ,  G06F11/00

CPC classification number: H03M13/6505 ,  H03M13/1545 ,  H03M13/158 ,  H03M13/159 ,  H03M13/6569

Abstract: During encoding, a microprocessor (201) calculates Ym by standard Reed-Solomon encoding techniques. The microprocessor (201) then utilizes Ym as an index to a look-up table (203), and is returned GoYm, G1Ym, ..., GK-1Ym, from the look-up table (203). During syndrome calculation, a second set of parity symbols are generated from the information symbols using the method similar to the encoder, in particular, values for GoYm, ..., GK-1Ym are obtained from a first look-up table (503) in a similar manner as encoder to determine the values for GoYm, G1Ym, ..., GK-1Ym. A second look-up table (505) is set up to determine roots of the error locator polynomial. The second look-up table consists of several tables and each table contains (Q-1) elements, where Q is the size of the GF(Q) field. The mth look-up table stores Galois Field element α-mi at location i if the greatest common denominator between (Q-1) and m (GCD(Q-1,m))=1. If GCD(Q-1,m) ≠1, then the mth look-up table actually consists of (GCD(Q-1,m)) sub-tables storing GF element α-(mi+j), where j=0, 1, ..., GCD(Q-1,m)-1.

Abstract translation: 在编码期间，微处理器（201）通过标准Reed-Solomon编码技术来计算Ym。 微处理器（201）然后利用Ym作为查找表（203）的索引，并从查找表（203）中返回GoYm，G1Ym，...，GK-1Ym。 在校正子计算期间，使用类似于编码器的方法从信息符号生成第二组奇偶校验符号，具体地，从第一查找表（503）获得GoYm，...，GK-1Ym的值。 以与编码器类似的方式确定GoYm，G1Ym，...，GK-1Ym的值。 建立第二查找表（505）以确定错误定位器多项式的根。 第二个查找表由几个表组成，每个表包含（Q-1）个元素，其中Q是GF（Q）字段的大小。 如果（Q-1）和m（GCD（Q-1，m））= 1之间的最大公分母，第m个查找表存储位置i处的伽罗瓦域元素α-mi。 如果GCD（Q-1，m）≠1，则第m查找表实际上由存储GF元素α-（mi + j）的（GCD（Q-1，m））子表格组成，其中j = 0 ，1，...，GCD（Q-1，m）-1。

公开(公告)号：EP0745295A1

公开(公告)日：1996-12-04

申请号：EP95939883.0

申请日：1995-10-26

Applicant: MOTOROLA, INC.

Inventor： YONG, Mei ,  YANG, Jian ,  NG, Dennis

IPC: H04J3 ,  H04L29 ,  H04N7

CPC classification number: H04N21/2365 ,  H04J3/247 ,  H04L29/06 ,  H04N21/23406 ,  H04N21/2385 ,  H04N21/2665

Abstract: The present invention provides a method (900) and device (100) in multimedia communication systems for efficiently segmenting information bitstreams from multiple media sources into variable length packets, and multiplexing and sending the packets to a shared communication link with low delay and low overhead. The packet segmentation and multiplexing are performed dynamically based on fullness of a set of information buffers that contain the information bitstreams to be transmitted, and delay-sensitivity of each information bitstream. The multi-discipline queuing scheme has been developed in this invention to control the dynamic packet segmenting and multiplexing process.

公开(公告)号：EP0745295B1

公开(公告)日：2005-02-02

申请号：EP95939883.5

申请日：1995-10-26

Applicant: MOTOROLA, INC.

Inventor： YONG, Mei ,  YANG, Jian ,  NG, Dennis

IPC: H04J3/16 ,  H04J3/26 ,  H04Q11/04 ,  H04J3/24 ,  H04L29/06 ,  H04N7/58

CPC classification number: H04N21/2365 ,  H04J3/247 ,  H04L29/06 ,  H04N21/23406 ,  H04N21/2385 ,  H04N21/2665

公开(公告)号：EP1219061A1

公开(公告)日：2002-07-03

申请号：EP00955667.1

申请日：2000-08-17

Applicant: MOTOROLA, INC.

Inventor： YANG, Jian

IPC: H04L5/16 ,  H04L7/00 ,  H04B1/38

CPC classification number: H04L7/0029 ,  H04L5/16 ,  H04L7/005

Abstract: During operation a transmitter and receiver of a central site termination unit (TU-C) (101) are driven by a sample clock derived from a network clock source (103). A remote termination unit (TU-R) (102) operates with a free running sampling clock and acquires and tracks the network clock (103) from a downstream signal (104). The regenerated network clock is then used to drive both the receiver (107) and the transmitter (108) of the TU-R (102). In particular, the transmit samples are generated on a block by block basis using fast algorithms. To avoid glitches during data transmission caused by block processing, the data sample at the boundary of blocks of data is replaced by an interpolated value. In particular, a first order approximation to the correct value of the boundary sample is made, and the first order approximation is substituted in place of the boundary data sample of the block.