公开(公告)号：WO1989009965A1

公开(公告)日：1989-10-19

申请号：PCT/US1989001142

申请日：1989-03-16

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  MCLAUGHLIN, Michael, Joseph ,  RASKY, Phillip, David

IPC: G06F11/10

CPC classification number: H04L1/201 ,  G10L19/005 ,  G11B20/1833 ,  H03M13/09 ,  H03M13/35 ,  H03M13/43 ,  H04B1/667 ,  H04L1/004 ,  H04L1/0061 ,  H04L1/0065 ,  H04L1/007 ,  H04L1/0071 ,  H04L1/0072 ,  H04L2001/0098

Abstract: A method and apparatus is disclosed (Fig. 3) for improving the quality of speech samples communicated via sub-band coding utilizing adaptive bit allocation (Fig. 1), by providing error detection only on the adaptive bit allocation information. A first error detection code (340), such as a cyclic redundancy check (CRC), is calculated on the bit allocation parameters (330) in the transmitter (130) and sent to the receiver (180), where a second error detection code (370) is calculated based upon the reconstructed bit allocation parameters (360). The transmitted error detection code is then used to determine (380) if the received bit allocation information is correct, and if not, the frame of speech data is discarded. By protecting only the bit allocation information, additional speech frames may be salvaged from the error-prone channel, thus further increasing speech intelligibility.

Abstract translation: 公开了一种用于通过仅利用自适应位分配信息提供错误检测来改善通过使用自适应位分配（图1）的子带编码传送的语音样本的质量的方法和装置（图3）。 对发送机（130）中的比特分配参数（330）计算出诸如循环冗余校验（CRC）的第一错误检测码（340），并将其发送到接收机（180），其中第二错误检测码 （370）基于重构的比特分配参数（360）来计算。 然后，发送的错误检测码用于确定（380）所接收的比特分配信息是否正确，如果不是，则丢弃该语音数据帧。 通过仅保护比特分配信息，可以从容易出错的信道中抢救附加语音帧，从而进一步增加语音可懂度。

公开(公告)号：WO1991006165A1

公开(公告)日：1991-05-02

申请号：PCT/US1990005359

申请日：1990-09-24

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  LABEDZ, Gerald, Paul ,  BORTH, David, Edward ,  RASKY, Phillip, David

IPC: H04L27/01

CPC classification number: H04L25/03318

Abstract: In a communications network having time-dispersed signals, there is provided a mechanism for soft decision decoding. It comprises: radio reception of a time-dispersed signal, at least partly equalizing those time-dispersal effects, recovering information contained in the signal, multiplying with that recovered information the absolute value of that at-least-partly-equalized signal (scaled by a number derived from channel conditions over a time during which at least part of the information to be recovered is distributed), and error-correcting the multiplied information by a Viterbi algorithm channel decoding scheme of error correction. Accordingly, soft decision information is generated from whithin the equalization process itself.

公开(公告)号：WO1997041658A1

公开(公告)日：1997-11-06

申请号：PCT/US1997006079

申请日：1997-04-11

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  BAUM, Kevin ,  KELTON, James, Robert ,  RASKY, Phillip, David

IPC: H04J03/06

CPC classification number: H04W56/0005 ,  H04J3/0682

Abstract: The present invention provides a communication system (100), device (200), and method of reverse link symbol timing synchronization of transmitted signals to facilitate reverse link timing synchronization. A base unit (204) transmits a forward link signal (160) and determines a timing offset for signals received on a reverse link synchronization channel (150). A plurality of multicarrier subscriber units (202) receive a forward link signal (160) and transmits a reverse link symbol timing synchronization burst on a reverse link channel (160).

Abstract translation: 本发明提供一种通信系统（100），装置（200）以及发送信号的反向链路符号定时同步的方法，以便于反向链路定时同步。 基站单元（204）发送前向链路信号（160），并确定在反向链路同步信道（150）上接收的信号的定时偏移。 多个多载波用户单元（202）接收前向链路信号（160），并在反向链路信道（160）上发送反向链路符号定时同步突发。

公开(公告)号：EP0495006B1

公开(公告)日：1996-12-04

申请号：EP90916969.0

申请日：1990-09-24

Applicant: MOTOROLA, INC.

Inventor： LABEDZ, Gerald, Paul ,  BORTH, David, Edward ,  RASKY, Phillip, David

IPC: H04L25/30 ,  H03M13/00

CPC classification number: H04L25/03318

Abstract: In a communications network having time-dispersed signals, there is provided a mechanism for soft decision decoding. It comprises: radio reception of a time-dispersed signal, at least partly equalizing those time-dispersal effects, recovering information contained in the signal, multiplying with that recovered information the absolute value of that at-least-partly-equalized signal (scaled by a number derived from channel conditions over a time during which at least part of the information to be recovered is distributed), and error-correcting the multiplied information by a Viterbi algorithm channel decoding scheme of error correction. Accordingly, soft decision information is generated from whithin the equalization process itself.

Abstract translation: 在具有时间分散信号的通信网络中，提供了用于软判决解码的机制。 它包括：时间分散信号的无线电接收，至少部分地均衡那些时间分散效应，恢复包含在信号中的信息，与该恢复的信息相乘该至少部分均衡的信号的绝对值（由 从期间信道条件导出的数字，在该时间期间分发至少一部分要恢复的信息），并且通过纠错的维特比算法信道解码方案对乘积信息进行纠错。 因此，在均衡处理本身中生成软判定信息。

公开(公告)号：EP0495006A1

公开(公告)日：1992-07-22

申请号：EP90916969.0

申请日：1990-09-24

Applicant: MOTOROLA, INC.

Inventor： LABEDZ, Gerald, Paul ,  BORTH, David, Edward ,  RASKY, Phillip, David

IPC: H04L25 ,  H04L27

CPC classification number: H04L25/03318

Abstract: Dans un réseau de communications comportant des signaux à dispersion temporelle, on a prévu un mécanisme de décodage de décision programmable. Il comprend: la réception radio d'un signal à dispersion temporelle, l'égalisation au moins partielle des effets de dispersion temporelle, la récupération d'informations contenues dans le signal, la multiplication à l'aide de ces informations récupérées de la valeur absolue de ce signal au moins paritellement égalisé (établi à l'échelle par un nombre dérivé des états du canal sur une durée pendant laquelle au moins une partie des informations à récupérer est répartie), et la correction des erreurs des informations multipliées à l'aide d'un plan de décodage de canal à algorithme Viterbi de correction d'erreurs. Par conséquent, des informations de décisions programmables sont produites à partir du procédé même d'égalisation.

公开(公告)号：EP0840964A1

公开(公告)日：1998-05-13

申请号：EP97920360.0

申请日：1997-04-11

Applicant: MOTOROLA, INC.

Inventor： BAUM, Kevin ,  KELTON, James, Robert ,  RASKY, Phillip, David

IPC: H04J3

CPC classification number: H04W56/0005 ,  H04J3/0682

Abstract: The present invention provides a communication system (100), device (200), and method of reverse link symbol timing synchronization of transmitted signals to facilitate reverse link timing synchronization. A base unit (204) transmits a forward link signal (160) and determines a timing offset for signals received on a reverse link synchronization channel (150). A plurality of multicarrier subscriber units (202) receive a forward link signal (160) and transmits a reverse link symbol timing synchronization burst on a reverse link channel (160).