公开(公告)号：US08116265B2

公开(公告)日：2012-02-14

申请号：US12273965

申请日：2008-11-19

Applicant: Dor Snapir ,  Dubi Lever

Inventor： Dor Snapir ,  Dubi Lever

IPC: H04W4/00 ,  H04J3/00 ,  H04B7/185

CPC classification number: H04H20/51 ,  H04H20/74 ,  H04H40/90 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/002 ,  H04L1/0025 ,  H04L1/201

Abstract: To allocate a very small aperture terminal (VSAT) to a modulation and coding pair (MODCOD) in a second generation digital video broadcasting satellite (DVB-S2) adaptive coding and modulation (ACM) system, a hub periodically transmits pilot frames of alternating MODCODs, which are identified by the VSAT. A field-programmable gate array (FPGA) at the VSAT site maintains telemetry of good and bad frames. A processor may then poll this telemetry to determine an optimal MODCOD to be allocated to the VSAT.

Abstract translation: 为了在第二代数字视频广播卫星（DVB-S2）自适应编码和调制（ACM）系统中将一个非常小的孔径终端（VSAT）分配给调制和编码对（MODCOD），集线器周期性地发送交替MODCOD的导频帧 ，由VSAT标识。 VSAT现场可编程门阵列（FPGA）可保持良好和不良帧的遥测。 然后，处理器可以轮询该遥测以确定要分配给VSAT的最佳MODCOD。

公开(公告)号：US08074158B2

公开(公告)日：2011-12-06

申请号：US11049991

申请日：2005-02-02

Applicant: Arun Visvanathan ,  Amit Butala ,  Parvathanathan Subrahmanya

Inventor： Arun Visvanathan ,  Amit Butala ,  Parvathanathan Subrahmanya

IPC: G06F11/00

CPC classification number: H04W52/12 ,  H04B1/7172 ,  H04L1/20 ,  H04L1/201 ,  H04L1/208 ,  H04W52/18 ,  H04W52/20 ,  H04W52/24 ,  H04W52/44

Abstract: To perform erasure detection for an intermittently active transport channel with unknown format, a receiver determines an energy metric and a symbol error rate (SER) for a received block with CRC failure. The receiver computes uncorrelated random variables u and v for the received block based on the energy metric and SER, the estimated means and standard deviations of the energy metric and SER, and a correlation coefficient indicative of the correlation between the energy metric and SER. The receiver then evaluates the uncorrelated random variables u and v based on at least one decision criterion and declares the received block to be an erased block or a DTX block based on the result of the evaluation. The decision criterion may be defined based on a target probability of false alarm and adjusted based on another metric, such as a zero state bit, for the received block.

Abstract translation: 为了对具有未知格式的间歇活动传输信道执行擦除检测，接收机确定具有CRC故障的接收块的能量度量和符号错误率（SER）。 接收机基于能量度量和SER，能量度量和SER的估计平均值和标准偏差以及表示能量度量与SER之间的相关性的相关系数，计算接收块的不相关随机变量u和v。 然后，接收机基于至少一个决策标准来评估不相关的随机变量u和v，并且基于评估结果将接收到的块声明为擦除块或DTX块。 可以基于目标误报率概率来定义判定标准，并且基于接收块的另一个度量（例如零状态位）进行调整。

公开(公告)号：US08023428B2

公开(公告)日：2011-09-20

申请号：US12625479

申请日：2009-11-24

Applicant: Richard Henry Erving ,  Robert Raymond Miller, II

Inventor： Richard Henry Erving ,  Robert Raymond Miller, II

IPC: H04L12/56 ,  H04J1/16

CPC classification number: H04L1/20 ,  H04L1/201

Abstract: A method for improving packetized speech transmitted over a wireless LAN is disclosed. Speech packets transmitted over the wireless LAN are monitored for errors. Any of the speech packets found to have errors are replaced with synthesized speech packets. The synthesized speech packets may be created from a vocal tract model generated from the received speech packets during periods of time when there are no errors.

Abstract translation: 公开了一种用于改善通过无线LAN发送的分组化语音的方法。 监视通过无线局域网传输的语音数据包的错误。 被发现有错误的任何一个语音分组被合成语音分组所取代。 可以在没有错误的时段期间从接收到的语音分组生成的声道模型创建合成语音分组。

公开(公告)号：USRE42453E1

公开(公告)日：2011-06-14

申请号：US12851013

申请日：2010-08-05

Applicant: Stephen Alan Allpress ,  Carlo Luschi

Inventor： Stephen Alan Allpress ,  Carlo Luschi

IPC: H04L27/06

CPC classification number: H04L1/0054 ,  H04L1/0072 ,  H04L1/201

Abstract: A decoder for use in a wireless communication device, the decoder comprising a correlator for correlating a received data sequence with a set of codewords such that a correlation value is generated for each correlation, wherein the set of codewords correspond to possible codewords that could be generated from encoding bit sequences having a predetermined number of information bits; a selector for selecting a first correlation value and a second correlation value generated by the correlator and for subtracting the second correlation value from the first correlation value to generate a third value; and a comparator for comparing the third value with a predetermined value to generate a decoding reliability indicator.

Abstract translation: 一种用于无线通信设备的解码器，所述解码器包括相关器，用于将接收到的数据序列与一组码字相关，使得为每个相关产生相关值，其中所述码字集合对应于可以生成的可能码字 从具有预定数量的信息比特的编码比特序列; 选择器，用于选择由相关器产生的第一相关值和第二相关值，并从第一相关值中减去第二相关值以产生第三值; 以及比较器，用于将第三值与预定值进行比较，以产生解码可靠性指示符。

公开(公告)号：US20110083065A1

公开(公告)日：2011-04-07

申请号：US12652465

申请日：2010-01-05

Applicant: Amit Singh ,  Göran Bergman ,  Gustaf Claëson

Inventor： Amit Singh ,  Göran Bergman ,  Gustaf Claëson

IPC: H03M13/09 ,  G06F11/10

CPC classification number: H04L1/0045 ,  H04L1/201

Abstract: A decoding-reliability metric from a received-signal decoder is compared with a threshold to decrease significantly the probability of false detection in a receiver and thus increase communication reliability and performance. In a wideband code division multiple access communication system, for example, significant decrease of the probability of false grant-message detection and significant increases of enhanced uplink performance and reliability can be obtained.

Abstract translation: 将来自接收信号解码器的解码可靠性度量与阈值进行比较，以显着降低接收机中的错误检测的概率，从而增加通信可靠性和性能。 例如，在宽带码分多址通信系统中，可以获得虚假授权消息检测的概率的显着降低和增强的上行链路性能和可靠性的显着增加。

公开(公告)号：US07730385B2

公开(公告)日：2010-06-01

申请号：US11289858

申请日：2005-11-30

Applicant: Jeffrey C. Smolinske ,  Michael E. Buckley ,  Kenneth A. Stewart

Inventor： Jeffrey C. Smolinske ,  Michael E. Buckley ,  Kenneth A. Stewart

IPC: H03M13/00

CPC classification number: H03M13/41 ,  H03M13/3746 ,  H03M13/3994 ,  H03M13/63 ,  H04L1/0054 ,  H04L1/0057 ,  H04L1/0059 ,  H04L1/0065 ,  H04L1/0072 ,  H04L1/20 ,  H04L1/201

Abstract: A wireless communication device employs a method for receiving a message stream on a control channel. According to one embodiment, the wireless communication device receives a message on the control channel. The wireless communication devices attempts to decode the message and, if the message is successfully decoded, adds bits of the successfully decoded message to a message attributes list. Some time thereafter, the wireless communication device attempts to decode a subsequent message received on the control channel and, if an error is detected during decoding of the subsequent message, replaces bits in the subsequent message with bits from the message attributes list to produce a modified message. The wireless device then attempts to decode the modified message.

Abstract translation: 无线通信设备采用在控制信道上接收消息流的方法。 根据一个实施例，无线通信设备在控制信道上接收消息。 无线通信设备尝试对消息进行解码，并且如果消息被成功解码，则将成功解码的消息的比特添加到消息属性列表。 之后的一段时间，无线通信设备尝试对在控制信道上接收到的后续消息进行解码，并且如果在后续消息的解码期间检测到错误，则使用来自消息属性列表的比特来替换后续消息中的比特，以产生经修改的 信息。 无线设备然后尝试对修改的消息进行解码。

公开(公告)号：US20100070267A1

公开(公告)日：2010-03-18

申请号：US12625479

申请日：2009-11-24

Applicant: Richard Henry Erving ,  Robert Raymond Miller, II

Inventor： Richard Henry Erving ,  Robert Raymond Miller, II

IPC: G10L19/00 ,  H04W84/02

CPC classification number: H04L1/20 ,  H04L1/201

Abstract: A method for improving packetized speech transmitted over a wireless LAN is disclosed. Speech packets transmitted over the wireless LAN are monitored for errors. Any of the speech packets found to have errors are replaced with synthesized speech packets. The synthesized speech packets may be created from a vocal tract model generated from the received speech packets during periods of time when there are no errors.

Abstract translation: 公开了一种用于改善通过无线LAN发送的分组化语音的方法。 监视通过无线局域网传输的语音数据包的错误。 被发现有错误的任何一个语音分组被合成语音分组所取代。 可以在没有错误的时段期间从接收到的语音分组生成的声道模型创建合成语音分组。

公开(公告)号：US20100036668A1

公开(公告)日：2010-02-11

申请号：US12537906

申请日：2009-08-07

Applicant: Khaled H. El-Maleh ,  Eddie-Lun Tik Choy ,  Arasanipalai K. Ananthapadmanabhan ,  Andrew P. DaJaco ,  Pengjun Huang

Inventor： Khaled H. El-Maleh ,  Eddie-Lun Tik Choy ,  Arasanipalai K. Ananthapadmanabhan ,  Andrew P. DaJaco ,  Pengjun Huang

IPC: G10L11/00

CPC classification number: H04L1/08 ,  H04L1/0046 ,  H04L1/201

Abstract: A system and method for detection of rate determination algorithm errors in variable rate communications system receivers. The disclosed embodiments prevent rate determination algorithm errors from causing audible artifacts such as screeches or beeps. The disclosed system and method detects frames with incorrectly determined data rates and performs frame erasure processing and/or memory state clean up to prevent propagation of distortion across multiple frames. Frames with incorrectly determined data rates are detected by checking illegal rate transitions, reserved bits, validating unused filter type bit combinations and analyzing relationships between fixed code-book gains and linear prediction coefficient gains.

Abstract translation: 一种用于在可变速率通信系统接收机中检测速率确定算法错误的系统和方法。 所公开的实施例防止速率确定算法错误引起可听见的伪影，例如吱吱声或嘟嘟声。 所公开的系统和方法检测具有错误确定的数据速率的帧，并执行帧擦除处理和/或存储器状态清理，以防止跨多个帧的失真传播。 通过检查非法速率转换，保留位，验证未使用的过滤器类型位组合以及分析固定代码簿增益和线性预测系数增益之间的关系来检测具有不正确确定的数据速率的帧。

公开(公告)号：US07496804B2

公开(公告)日：2009-02-24

申请号：US11210788

申请日：2005-08-25

Applicant: Carsten Juncker

Inventor： Carsten Juncker

IPC: G06F11/00 ,  G01R31/00

CPC classification number: H04L1/201 ,  H04L1/0061 ,  H04L1/203

Abstract: There is provided a receiver comprising a processing unit, a communications unit for receiving frames including training sequence symbols or pilot symbols, the processing unit being configured to use Cyclic Redundancy Check for detecting errors in the received frames. When no errors in a given frame are discovered on the basis of the Cyclic Redundancy Check, the processing unit is further configured to define a TSC, training sequence code, bit error rate for the bursts of the given frame on the basis of the training sequence symbols or the pilot symbols; to define an upper limit for the TSC bit error rate; and to determine the given frame to be bad when the TSC bit error rate for the bursts of the given frame is greater than the upper limit of the TSC bit error rate.

Abstract translation: 提供了一种接收机，包括处理单元，用于接收包括训练序列符号或导频符号的帧的通信单元，所述处理单元被配置为使用循环冗余校验来检测接收到的帧中的错误。 当在循环冗余检查的基础上没有发现给定帧中的错误时，处理单元还被配置为基于训练序列来定义给定帧的突发的TSC，训练序列码，比特错误率 符号或导频符号; 定义TSC比特错误率的上限; 并且当给定帧的突发的TSC比特错误率大于TSC比特错误率的上限时，确定给定的帧是坏的。

公开(公告)号：US20080294967A1

公开(公告)日：2008-11-27

申请号：US11751313

申请日：2007-05-21

Applicant: Martin Tomlinson ,  Cen Jung Tjhai

Inventor： Martin Tomlinson ,  Cen Jung Tjhai

IPC: H03M13/09

CPC classification number: H03M13/3738 ,  H04L1/1829 ,  H04L1/20 ,  H04L1/201

Abstract: In packet digital communications using a two way communications medium such as wireless each received packet is subject to noise and/or interference which causes errors in some of the received symbols. A common method known as Incremental Redundancy (IR), Hybrid Automatic Repeat Request (HARQ) for corrects these transmission errors by using error detection in conjunction with transmission of additional redundant symbols forming a sequence of forward error correcting codes. Any residual errors are detected by means of a Cyclic Redundancy Check (CRC). The CRC symbols represent transmission overhead and degrade the throughput regardless of the quality of the transmission channel. This invention is concerned with providing error detection without the need for a CRC thereby improving the throughput. In a further embodiment of the invention for those systems that employ a CRC increased reliability of detection is provided which also leads to an improvement in throughput. It is shown that by adjustment of a simple threshold value, the overall packet error rate may be traded off against throughput in a flexible manner. A method of construction of a sequence of codes from a nested block code is described and an example is provided based on a nested block code of length 128. The associated performance graphs of the invention, both using and not using a CRC, for this sequence of codes are given showing the performance improvements of the invention compared to the standard arrangement using a CRC for the same sequence of error correcting codes.

Abstract translation: 在使用诸如无线的双向通信介质的分组数字通信中，每个接收到的分组经受在一些接收到的符号中导致错误的噪声和/或干扰。 称为增量冗余（IR），混合自动重复请求（Hybrid Automatic Repeat Request，混合自动重复请求）的混合自动重传请求（HARQ），通过使用错误检测结合传输附加的冗余符号来纠正这些传输错误，形成前向纠错码序列。 通过循环冗余校验（CRC）检测任何残差。 CRC符号表示传输开销并且降低吞吐量，而与传输信道的质量无关。 本发明涉及提供错误检测，而不需要CRC从而提高吞吐量。 在本发明的另一个实施例中，提供了采用CRC增加的检测可靠性的那些系统，这也导致吞吐量的改善。 示出了通过调整简单的阈值，可以以灵活的方式将整体分组错误率与吞吐量进行交易。 描述了构建来自嵌套块码的代码序列的方法，并且基于长度为128的嵌套块码提供了一个示例。本发明的相关性能图，使用和不使用CRC，用于该序列 的代码给出了与使用相同的纠错码序列的CRC相比的本发明的性能改进。