公开(公告)号：US06233284B1

公开(公告)日：2001-05-15

申请号：US08804784

申请日：1997-02-20

申请人： Brent Townshend

发明人： Brent Townshend

IPC分类号： H04B1404

CPC分类号： H04L7/0029 ,  H04L5/1438 ,  H04L25/4917 ,  H04L25/4927 ,  H04M11/00 ,  H04M11/06 ,  H04Q11/00 ,  H04Q11/04 ,  H04Q11/0428 ,  H04Q2213/13034 ,  H04Q2213/13036 ,  H04Q2213/1305 ,  H04Q2213/1309 ,  H04Q2213/13103 ,  H04Q2213/13107 ,  H04Q2213/13174 ,  H04Q2213/13179 ,  H04Q2213/13199 ,  H04Q2213/13202 ,  H04Q2213/13204 ,  H04Q2213/13209 ,  H04Q2213/13299 ,  H04Q2213/1332 ,  H04Q2213/13337 ,  H04Q2213/1336 ,  H04Q2213/13385 ,  H04Q2213/13396

摘要： A method of selecting a PCM codeword set. A communication system includes an encoder and a decoder. The encoder has a digital connection to the digital portion of the telephone network. The digital portion of the telephone network is connected by an analog loop to the decoder. The method includes transmitting sequence of PCM codewords from the encoder and receiving the sequence as a sequence of analog voltages. A noise level it determined and a minimum separation value is selected in response to the noise level. A set of PCM codewords is selected such that no two PCM codewords within the set are separated by less than minimum separation value.

摘要翻译： 一种选择PCM码字集合的方法。 通信系统包括编码器和解码器。 编码器具有到电话网络的数字部分的数字连接。 电话网络的数字部分通过模拟环路连接到解码器。 该方法包括从编码器传送PCM码字的序列，并将该序列作为模拟电压的序列接收。 响应于噪声电平选择其确定的噪声电平和最小分离值。 选择一组PCM码字，使得该组内的两个PCM码字不被最小分离值分开。

公开(公告)号：US06829305B2

公开(公告)日：2004-12-07

申请号：US09730746

申请日：2000-12-07

申请人： Young Hwan Kang ,  Cheol Woo You ,  Jee Woong Seol

发明人： Young Hwan Kang ,  Cheol Woo You ,  Jee Woong Seol

IPC分类号： H04B1404

CPC分类号： H04L1/005 ,  H03M13/27 ,  H03M13/29 ,  H03M13/2957 ,  H04L1/0041 ,  H04L1/0065 ,  H04L1/0066 ,  H04L1/0068 ,  H04L1/0069

摘要： The present invention relates to a concatenated convolutional encoder and decoder for the next generation mobile communication system requiring a high performance channel coding, in particular to a concatenated convolutional encoder and decoder of a mobile communication system which is capable of providing a dual mode encoder and decoder for supporting both a parallel concatenated convolutional code and a serially concatenated convolutional code and improving the performance of the system by using punctured and thrown away sequence in a convolutional encoder. The present invention can show stable performance regardless of SNR, accordingly the credibility of the system can increase.

摘要翻译： 本发明涉及一种用于需要高性能信道编码的下一代移动通信系统的级联卷积编码器和解码器，特别涉及能够提供双模式编码器和解码器的移动通信系统的级联卷积编码器和解码器 用于支持并行级联卷积码和串行级联卷积码，并通过在卷积编码器中使用穿孔和丢弃序列来提高系统的性能。 本发明可以显示稳定的性能，而不管SNR如何，因此可以增加系统的可信度。

公开(公告)号：US06687306B1

公开(公告)日：2004-02-03

申请号：US09527008

申请日：2000-03-16

申请人： Zhenyu Wang ,  Jinguo Yu

发明人： Zhenyu Wang ,  Jinguo Yu

IPC分类号： H04B1404

CPC分类号： H04B14/04 ,  H04L25/4927

摘要： A first transceiver transmits a set of test levels to a second transceiver through a communication channel with one or more types of companding laws. The second transceiver determines line encoding with, and conversion between, the companding laws present in the communication channel based on the received set of test signals. The set of test levels are signals having levels determined based on the difference between the normalized amplitude, vertex, or energy curves for the types of companding laws, with or without accounting for other sources of network distortion. Additional distortion from line characteristics, such as robbed-bit signaling (RBS) and/or line impairment, may be detected based on changes in encoding sample levels of transmitted test signals that are reconstructed by the second transceiver. The second transceiver may then transmit information to the first transceiver about the companding laws and other sources of distortion present in the network. The second transceiver employs a method of constellation adjustment to correct for distortion resulting from line encoding, encoding conversion, RBS and other line impairments. For a given, detected encoding conversion during the training phase, two constellations are employed, one for the first transceiver and one for the second transceiver. For constellation adjustment, each transceiver first detects encoding, encoding conversion, RBS, and other line impairments using a set of PCM test levels during their respective training phases. The second transceiver then adjusts its transmit constellation for communication with the first transceiver based on the detected encoding, encoding conversion, RBS, and other line impairments.

摘要翻译： 第一收发器通过具有一种或多种类型的压扩定律的通信信道将一组测试级别发送到第二收发器。 第二收发机基于所接收的一组测试信号来确定在通信信道中存在的压扩法的线路编码和转换。 测试级别的集合是具有基于压缩法的类型的归一化幅度，顶点或能量曲线之间的差确定的等级的信号，具有或不考虑其他网络失真源。 可以基于由第二收发器重建的发送的测试信号的编码采样电平的变化来检测来自诸如抢占信令（RBS）和/或线路损害的线路特性的附加失真。 然后，第二收发器可以向第一收发器发送关于网络中存在的压扩定律和其它失真源的信息。 第二收发器采用星座调整的方法来校正由线编码，编码转换，RBS和其他线路损伤引起的失真。 对于在训练阶段期间的给定的检测到的编码转换，采用两个星座，一个用于第一收发器，一个用于第二收发器。 对于星座调整，每个收发器首先在各自的训练阶段使用一组PCM测试级别来检测编码，编码转换，RBS和其他线路损伤。 然后，第二收发器基于检测到的编码，编码转换，RBS和其他线路损伤来调整其与第一收发器通信的发送星座。

公开(公告)号：US06647063B1

公开(公告)日：2003-11-11

申请号：US08506726

申请日：1995-07-26

申请人： Yoshiaki Oikawa

发明人： Yoshiaki Oikawa

IPC分类号： H04B1404

CPC分类号： G10L19/035

摘要： A method of encoding information of an input signal using a fixed number of bits for each unit time frame. Part of the encoded information of at least one second frame temporally consecutively or non-consecutively preceding or following a first frame is contained in the encoded information of the first frame. This eliminates fluctuations in the sound quality due to bit surplus/shortage resulting from quantization for achieving efficient encoding and decoding.

摘要翻译： 一种对于每个单位时间帧使用固定位数编码输入信号的信息的方法。 在第一帧的编码信息中包含至少一个第二帧的时间上连续地或非连续地在第一帧之前或之后的编码信息的一部分。 这消除了由于用于实现有效的编码和解码的量化导致的位剩余/不足导致的声音质量的波动。

公开(公告)号：US06636568B2

公开(公告)日：2003-10-21

申请号：US10087503

申请日：2002-03-01

申请人： Tamer Kadous

发明人： Tamer Kadous

IPC分类号： H04B1404

CPC分类号： H04L1/20 ,  H04B7/0417 ,  H04L1/0002 ,  H04L1/0017 ,  H04L1/06 ,  H04L1/0631

摘要： Techniques to determine data rates for a number of data streams transmitted via a number of transmission channels (or transmit antennas) in a multi-channel (e.g., MIMO) communication system. In one method, the “required” SNR for each data rate to be used is initially determined, with at least two data rates being unequal. The “effective” SNR for each data stream is also determined based on the received SNR and successive interference cancellation processing at the receiver to recover the data streams. The required SNR for each data stream is then compared against its effective SNR. The data rates are deemed to be supported if the required SNR for each data stream is less than or equal to its effective SNR. A number of sets of data rates may be evaluated, and the rate set associated with the minimum received SNR may be selected for use for the data streams.

摘要翻译： 确定通过多信道（例如，MIMO）通信系统中的多个传输信道（或发射天线）发送的多个数据流的数据速率的技术。 在一种方法中，首先确定要使用的每个数据速率的“所需”SNR，其中至少两个数据速率是不相等的。 每个数据流的“有效”SNR也是基于收到的SNR和在接收机处的连续干扰消除处理来确定的，以恢复数据流。 然后将每个数据流的所需SNR与其有效SNR进行比较。 如果每个数据流的所需SNR小于或等于其有效SNR，则视为支持数据速率。 可以评估多组数据速率，并且可以选择与最小接收SNR相关联的速率设置用于数据流。

公开(公告)号：US06606356B1

公开(公告)日：2003-08-12

申请号：US09430130

申请日：1999-10-29

申请人： Takashi Nanya

发明人： Takashi Nanya

IPC分类号： H04B1404

CPC分类号： G06F9/3869

摘要： An asynchronous digital system, an asynchronous data path circuit, an asynchronous digital signal processing circuit and an asynchronous digital signal processing method, which enables improved processing speed while maintaining high reliability are provided by dividing the overall chip into blocks with a specified area, forming the connection between the blocks by applying thereto a delay insensitive (Dl) model or a quasi delay insensitive (QDI) model, while forming each block by applying thereto a scalable delay insensitive (SDI) model. In the SDI model, the system is configured using circuit components having a delay assumed during design in which if the specification states that a signal transition (b) in a subcircuit 7 precedes a signal transition (c) in a subcircuit 8, &kgr;·Tab

摘要翻译： 通过将整个芯片划分成具有指定区域的块来提供异步数字系统，异步数据路径电路，异步数字信号处理电路和异步数字信号处理方法，其能够在保持高可靠性的同时提高处理速度，形成 通过向块施加延迟不敏感（D1）模型或准延迟不敏感（QDI）模型，同时通过向可应用的延迟不敏感（SDI）模型应用形成每个块来连接。 在SDI模型中，使用在设计期间具有延迟的电路组件来配置系统，其中如果规范规定子电路7中的信号转换（b）在子电路8中的信号转换（c）之前，kappa.Tab

公开(公告)号：US06570927B1

公开(公告)日：2003-05-27

申请号：US09340101

申请日：1999-06-25

申请人： Nick Andrew Van Stralen ,  John Anderson Fergus Ross ,  John Bailey Anderson

发明人： Nick Andrew Van Stralen ,  John Anderson Fergus Ross ,  John Bailey Anderson

IPC分类号： H04B1404

CPC分类号： H03M13/235 ,  H03M13/3938 ,  H03M13/6362

摘要： A method is described for convolutionally encoding and decoding data (voice coded data), organized into (35-bit, 20 msec) frames, where the data is encoded by a finite-state data encoder (RSC coder 216) for transmission over a data channel (18). The RSC encoder avoids the need for termination bits associated with each N-bit frame of data, so that the number of bits associated with each encoded frame is reduced, and the throughput of the channel can be increased. The method according to the invention includes storing the first M bits of each frame. Once they are stored, they are loaded in parallel into the M stages of the encoder, thereby deleting residual states from the preceding frame. The remaining (N−M) bits are then applied to the encoder, causing it to produce the convolutional code. After the last of the (N−M) bits are encoded, the M stored bits are summed with feedback from the encoder, and reapplied to the encoder. The ending state of the encoder is thus equal to the starting state.

摘要翻译： 描述了一种用于对组织成（35位，20毫秒）帧的数据（语音编码数据）进行卷积编码和解码的方法，其中数据由有限状态数据编码器（RSC编码器216）编码，用于通过数据传输 通道（18）。 RSC编码器避免需要与每个N位数据帧相关联的终止位，从而减少与每个编码帧相关联的比特数，并且可以增加信道的吞吐量。 根据本发明的方法包括存储每帧的前M位。 一旦它们被存储，它们被并行地加载到编码器的M个级中，从而从前一帧中删除残余状态。 剩余的（N-M）位然后被施加到编码器，使其产生卷积码。 在编码最后一个（N-M）位之后，M个存储的位与来自编码器的反馈相加，并重新应用于编码器。 因此编码器的结束状态等于起始状态。

公开(公告)号：US06563877B1

公开(公告)日：2003-05-13

申请号：US09282260

申请日：1999-03-31

申请人： Ayyoob Dehgani Abbaszadeh

发明人： Ayyoob Dehgani Abbaszadeh

IPC分类号： H04B1404

CPC分类号： H03M13/3905 ,  H03M13/3723 ,  H03M13/3922 ,  H03M13/3972 ,  H03M13/6583 ,  H04L25/03171

摘要： A block sliding window data decoder includes a forward recursion calculator and a plurality of backward recursion calculators including a first backward recursion calculator and a second backward recursion calculator that receives inputs from the first backward recursion calculator. The first backward recursion calculator operates every D cycles to perform a backward recursion over received input signals, while assuming that all future states are equally likely. The decoder further includes a symbol probability calculator that receives inputs from the forward recursion calculator and from the first backward recursion calculator. A memory of the decoder stores the input signals and is organized as N cells, wherein for each cycle one of the N cells is written while N−1 of the cells are read and their contents provided to the forward recursion calculator and to the first and second backward recursion calculators. Each calculation cell of the decoder includes a normalizer for normalizing the input signal and signals processed by the forward recursion calculator and the first and second backward recursion calculators. The normalizer is implemented using AND functions.

摘要翻译： 块滑动数据解码器包括正向递归计算器和多个向后递归计算器，其包括第一后​​向递归计算器和第二后向递归计算器，其接收来自第一向后递归计算器的输入。 第一个反向递归计算器运行每个D个周期，以便在接收到的输入信号上执行向后递归，同时假定所有将来的状态同样是可能的。 解码器还包括符号概率计算器，其接收来自前向递归计算器和第一向后递归计算器的输入。 解码器的存储器存储输入信号并被组织为N个单元，其中对于每个周期，写入N个单元中的一个，单元的N-1被读取并且其内容提供给正向递归计算器，并且其内容被提供给第一和 第二个向后递归计算器。 解码器的每个计算单元包括用于对输入信号进行归一化的归一化器和由正向递归计算器和第一和第二后向递归计算器处理的信号。 归一化器使用AND函数实现。

公开(公告)号：US06501802B1

公开(公告)日：2002-12-31

申请号：US09239229

申请日：1999-01-29

申请人： Richard G. C. Williams

发明人： Richard G. C. Williams

IPC分类号： H04B1404

CPC分类号： H04B14/04 ,  H04L25/4927

摘要： A method of transmitting a quite, or zero, signal in a PCM communication system. The zero signal is specified universally in ordered set terms for either &mgr;-Law or A-Law PCM systems, which has minimal energy in the A-Law system, and contains no energy within the &mgr;-Law system. The signal is preferably specified as a repetition of six intervals (or multiple thereof) because the DTN can modify PCM codes on a six interval period by the robbed-bit signaling mechanism. The zero signal may be used to detect network elements that produce single-signed zero outputs from zero inputs of either sign. In addition, by examination of the zero signal the receiver may determine whether the channel includes an analog link or connection.

摘要翻译： 一种在PCM通信系统中传输相当或零信号的方法。 零信号通常在有序集合术语中被规定为在法律系统中具有最少能量的μ律或A-Law PCM系统，并且在mu-Law系统中不包含能量。 信号优选地被指定为六个间隔（或其多个）的重复，因为DTN可以通过抢占位信令机制在六个间隔周期上修改PCM码。 零信号可用于检测从任一符号的零输入产生单符号零输出的网络元件。 此外，通过检查零信号，接收机可以确定信道是否包括模拟链路或连接。

公开(公告)号：US06480549B1

公开(公告)日：2002-11-12

申请号：US09056331

申请日：1998-04-07

申请人： Frederic J. Hirzel ,  Victor Demjancuko

发明人： Frederic J. Hirzel ,  Victor Demjancuko

IPC分类号： H04B1404

CPC分类号： H04L25/4927

摘要： A method of determining digital channel attenuation; comprising the steps of: receiving a known training sequence of PCM codes, which PCM codes are subjected to the attenuation within the digital channel; quantizing the received known training sequence of PCM codes according to a predetermined thresholding procedure; identifying identical PCM codes created as a result of the thresholding procedure; and, determining the attenuation of the digital channel based upon the identification of identical PCM codes. A method is also disclosed for determining a digital channel PCM code transformation comprising receiving a known training sequence of PCM codes, which PCM codes are subjected to the PCM code transformation within the digital channel, quantizing the received known training sequence of PCM codes according to a predetermined thresholding procedure, and determining the transformation of transmitted codes to those received. A method is also disclosed for improved echo cancellation in a communications network having an analog and a digital modem, comprising saving codes transmitted from the digital modem to the analog modem for echo cancellation, transforming, by a mapping table, codes transmitted from said digital modem to codes received by the analog modem, and, using the received codes as a reference signal for cancellation of echo. A method of improved spectral shaping using a transmit shaping transfer function in a communications network having an analog and a digital modem, comprising, transforming, by a mapping table, codes transmitted from the digital modem to codes received by the analog modem, using the received codes for transformation to their linear value equivalent representations, and, applying the linear value representations to the transmit shaping transfer function.

摘要翻译： 一种确定数字信道衰减的方法; 包括以下步骤：接收PCM码的已知训练序列，该PCM码经受数字频道内的衰减; 根据预定的阈值处理量化接收的已知PCM码训练序列; 识别由阈值过程产生的相同的PCM码; 以及基于相同的PCM代码的识别来确定数字信道的衰减。 还公开了一种用于确定数字信道PCM码变换的方法，该方法包括：接收PCM码的已知训练序列，该PCM码在数字信道内进行PCM码变换，对PCM码的接收的已知训练序列进行量化，根据 预定的阈值处理程序，以及确定发送的代码到接收的代码的变换。 还公开了一种用于在具有模拟和数字调制解调器的通信网络中改善回声消除的方法，包括将从数字调制解调器发送的代码保存到模拟调制解调器以进行回波消除，通过映射表将从所述数字调制解调器发送的代码变换 到由模拟调制解调器接收的编码，并且使用接收到的代码作为用于消除回波的参考信号。 一种在具有模拟和数字调制解调器的通信网络中使用发射整形传递函数改进频谱整形的方法，包括：通过映射表将从数字调制解调器发送的代码转换为由模拟调制解调器接收的码，使用接收的 用于转换为其线性值等效表示的代码，以及将线性值表示应用于发送整形传递函数。