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41. 发明授权

US06621855B1 Scalable spread-spectrum signal detection and acquisition processor 有权
标题翻译：可扩展扩频信号检测和采集处理器
公开(公告)号：US06621855B1
公开(公告)日：2003-09-16
申请号：US09318853
申请日：1999-05-26
申请人： Nick Andrew Van Stralen , Richard August Korkosz , Gary Jude Saulnier , John Erik Hershey , Naofal Mohammed Wassel Al-Dhahir
发明人： Nick Andrew Van Stralen , Richard August Korkosz , Gary Jude Saulnier , John Erik Hershey , Naofal Mohammed Wassel Al-Dhahir
IPC分类号： H04B169
CPC分类号： H04B1/70752 , H04B1/708
摘要： A method allows determination of the presence of, the frequency of, and or the timing of a coded signal distributed in time, as for example a direct-sequence spread-spectrum signal or a signal having a coded header. According to the method, the received signal is correlated (16, 216, 316) with small sections of the spreading or header code, to produce partial correlations, as for example a 1024-chip spreading code is correlated in eight- or sixteen-chip portions. The result of each partial correlation is delayed (32, 232, 332/350) by an amount which results in temporal congruence or simultaneous occurrence of the partial correlations at a Doppler processor. The processor processes the simultaneous partial correlations, to produce signals which recur in the appropriate frequency bin at the recurrence rate of the spreading code. The frequency bin identifies the frequency of the received signals, and the time of the appearance of the signals at the bins is indicative of the time.
摘要翻译：一种方法允许确定在时间上分布的编码信号的存在，频率和/或定时，例如直接序列扩频信号或具有编码报头的信号。根据该方法，接收信号与扩展或报头代码的小部分相关（16,216,316），以产生部分相关性，例如1024个码片扩展码在八或十六个芯片中相关部分。每个部分相关的结果被延迟（32,232,332/350）一个量，这导致在多普勒处理器处的部分相关性的时间一致性或同时发生。处理器处理同时的部分相关，以产生以扩展码的复现速率在适当频率仓中重复的信号。频率仓识别接收到的信号的频率，并且信号在信息箱出现的时间表示时间。

42. 发明授权

US06594792B1 Modular turbo decoder for expanded code word length 有权
标题翻译：用于扩展码字长度的模块化turbo解码器
公开(公告)号：US06594792B1
公开(公告)日：2003-07-15
申请号：US09561333
申请日：2000-04-28
申请人： Stephen Michael Hladik , Abdallah Mahmoud Itani , Nick Andrew Van Stralen , Robert Gideon Wodnicki , John Anderson Fergus Ross
发明人： Stephen Michael Hladik , Abdallah Mahmoud Itani , Nick Andrew Van Stralen , Robert Gideon Wodnicki , John Anderson Fergus Ross
IPC分类号： H03M1329
CPC分类号： H03M13/3905 , H03M13/2957 , H03M13/3933 , H03M13/3972
摘要： A turbo decoder system utilizing a MAP decoding algorithm has a predetermined number of turbo decoder modules for decoding segments of a turbo code component code word in parallel, thereby expanding the block-length and data-rate capability of the turbo decoder system. Input data samples are provided to an interleaver/de-interleaver module wherein they are divided into segments of predetermined size, each segment being provided to a respective turbo decoder module. The outputs of each turbo decoder module are a posteriori probabilities which are re-ordered in the interleaver/de-interleaver module, segmented, and provided back to the turbo decoders as a priori information-bit probabilities. For the case of a turbo code comprising two component codes, the a posteriori information-bit probabilities are re-ordered according to the interleaver definition at the end of odd-numbered half iterations, while at the end of even-numbered half iterations, they are re-ordered according to the de-interleaver definition. Decoding continues until the desired number of iterations have been performed. Data decisions are made on the final a posteriori bit probability estimates.
摘要翻译：利用MAP解码算法的turbo解码器系统具有预定数量的turbo解码器模块，用于并行地解码turbo码分量码字的段，从而扩展turbo解码器系统的块长度和数据速率能力。将输入数据样本提供给交织器/解交织器模块，其中它们被划分成预定大小的段，每个段被提供给相应的turbo解码器模块。每个turbo解码器模块的输出是在交织器/解交织器模块中重排序的后验概率，被分段并作为先验信息比特概率返回给turbo解码器。对于包括两个分量代码的turbo码的情况，根据奇数半迭代结束时的交织器定义重新排序后验信息比特概率，而在偶数半迭代结束时，它们根据解交织器定义重新排序。解码继续，直到执行所需的迭代次数。对最终的后验位概率估计作出数据决定。

43. 发明授权

US06570927B1 Method for tail-biting and decoding recursive systematic codes 失效
标题翻译：递归和解码递归系统代码的方法
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。

44. 发明授权

US06393072B1 Channel decoder using vocoder joint statistics 有权
标题翻译：频道解码器使用声码器联合统计
公开(公告)号：US06393072B1
公开(公告)日：2002-05-21
申请号：US09340102
申请日：1999-06-25
申请人： John Anderson Fergus Ross , Nick Andrew Van Stralen , Mark Lewis Grabb , Steven Robert Koch , Richard Louis Zinser, Jr. , John Bailey Anderson
发明人： John Anderson Fergus Ross , Nick Andrew Van Stralen , Mark Lewis Grabb , Steven Robert Koch , Richard Louis Zinser, Jr. , John Bailey Anderson
IPC分类号： H04L2706
CPC分类号： H04L1/0047 , H04L25/061 , H04L25/067
摘要： A method for decoding (voice)data where the data is encoded by a finite-state data encoder (216) for transmission over a data channel (18), includes the step of procuring a table of joint statistics representing the probability of occurrence, in a frame of source data of each of the bits of the frame. The joint statistics may be determined ahead of time. The method includes the step of calculating intermediate gamma signals in response to the decoded data of the preceding frame and the joint statistics. The joint statistics source distribution signals represent the likelihood that, for a given logic level of the preceding bit, the “current” bit takes on a particular state; for uncorrelated bits, this value is 0.5. State probability signals and transition probability signals are generated from the gamma signals. The state probability and transition probability signals are processed to produce bit probability signals indicative of the probability that the current bit is in a given state, from which hard bit decisions can be made.
摘要翻译：一种用于解码（语音）数据的方法，其中数据由有限状态数据编码器（216）编码，用于通过数据信道（18）进行传输，包括以下步骤：采购表示发生概率的联合统计表，帧的每个比特的源数据帧。联合统计可以提前确定。该方法包括响应于前一帧的解码数据和联合统计来计算中间伽马信号的步骤。联合统计源分布信号表示对于前一比特的给定逻辑电平，“当前”比特处于特定状态的可能性; 对于不相关的位，此值为0.5。从伽马信号产生状态概率信号和转移概率信号。处理状态概率和转移概率信号以产生指示当前比特处于给定状态的概率的比特概率信号，从中可以进行硬比特决定。

45. 发明授权

US06304299B1 System and method for mitigating multipath effects in television systems 有权
标题翻译：用于减轻电视系统中多路径效应的系统和方法
公开(公告)号：US06304299B1
公开(公告)日：2001-10-16
申请号：US09201376
申请日：1998-11-30
申请人： Richard Louis Frey , Naofal Mohammed Wassel Al-Dhahir , Mark Lewis Grabb , John Anderson Fergus Ross , John Erik Hershey , Nick Andrew Van Stralen
发明人： Richard Louis Frey , Naofal Mohammed Wassel Al-Dhahir , Mark Lewis Grabb , John Anderson Fergus Ross , John Erik Hershey , Nick Andrew Van Stralen
IPC分类号： H04N521
CPC分类号： H04N5/211
摘要： A wide-band overlay sequence generator adds an overlay signal to a television signal which is transmitted through a channel. At a receiver, a replica of the transmitted overlay sequence is generated and synchronized to the overlay signal in the received signal. An adaptive equalizer filter effectively adjusts the received television signal so that the channel perturbations are removed from the signal.
摘要翻译：宽带覆盖序列发生器将叠加信号添加到通过信道传输的电视信号。在接收机处，生成并发送覆盖序列的副本并将其与接收信号中的覆盖信号同步。自适应均衡器滤波器有效地调整接收到的电视信号，从而从信号中去除信道扰动。

46. 发明授权

US06223319B1 Turbo code decoder with controlled probability estimate feedback 失效
标题翻译：具有受控概率估计反馈的Turbo码解码器
公开(公告)号：US06223319B1
公开(公告)日：2001-04-24
申请号：US09137257
申请日：1998-08-20
申请人： John Anderson Fergus Ross , Stephen Michael Hladik , Nick Andrew Van Stralen , John Bailey Anderson
发明人： John Anderson Fergus Ross , Stephen Michael Hladik , Nick Andrew Van Stralen , John Bailey Anderson
IPC分类号： G06F1110
CPC分类号： H03M13/3905 , H03M13/2957 , H03M13/3933 , H03M13/6577 , H03M13/658
摘要： A feedback control for a turbo decoder controls the feedback between component decoders by modifying updated a priori probabilities calculated by one component decoder and used as inputs to another component decoder during the decoding process, resulting in a significant performance advantage. A feedback control switch selects either previously estimated a posteriori probabilities, modifications of these values, or neutral values as a priori probabilities utilized by the next component decoder.
摘要翻译：用于turbo解码器的反馈控制通过修改由一个分量解码器计算出的先验概率并在解码过程中用作另一个分量解码器的输入来控制组件解码器之间的反馈，从而产生显着的性能优势。反馈控制开关选择先前估计的后验概率，这些值的修改或中性值作为下一个组件解码器利用的先验概率。

47. 发明授权

US5903594A Power line communications spread spectrum protocol 失效
标题翻译：电力线通信扩频协议
公开(公告)号：US5903594A
公开(公告)日：1999-05-11
申请号：US838215
申请日：1997-04-16
申请人： Emilie Thorbjorg Saulnier , Richard August Korkosz , John Erik Hershey , Michael James Hartman , Ralph Thomas Hoctor , Nick Andrew Van Stralen
发明人： Emilie Thorbjorg Saulnier , Richard August Korkosz , John Erik Hershey , Michael James Hartman , Ralph Thomas Hoctor , Nick Andrew Van Stralen
IPC分类号： H04B1/69 , H04B3/54 , H04B15/00 , H04M11/04
CPC分类号： H04B3/546 , H04B1/69 , H04B2203/5408 , H04B2203/5416 , H04B2203/5425 , H04B2203/5433 , H04B2203/5458
摘要： A spread spectrum protocol in a power line communication (PLC) system uses Harmonic Modulation (HM) as true spread spectrum modulation made up of a plurality of modulated tones spaced in frequency with equal distance between adjacent tones. The protocol incorporates the following modes:"Conventional"--Master/Slave relation of meters to a common hub."Leap Frog"--performing data relay through locally elected/designated meters for relay to a central hub or a distributed set of concentrators."Alarm Channel"--reserving an HM signal set for meters to telemeter their configuration in a subnetwork after a power distribution network reconfiguration."Probing"--using HM polling to diagnose the location of a feeder fault."Derived Timing"--master derived timing for inbound message framing."Rate Adapting"--allocating a mix of number of HM channels to the outbound/inbound ratio according to message traffic control requirements and power line distribution topology."Priority/Noise Based Adapting"--allocating a different mix of number of HM channels to the outbound/inbound ratio based on message priority or noise conditions.
摘要翻译：电力线通信（PLC）系统中的扩频协议使用谐波调制（HM）作为由相邻音调之间具有相等距离的频率间隔的多个调制音调构成的真实扩频调制。该协议包含以下模式：“常规” - 仪表与公共集线器的主/从关系。 “飞跃青蛙” - 通过本地选举/指定的仪表执行数据继电器，用于中继到中央集线器或分布式集中器。 “报警通道” - 在配电网络重新配置之后，保留用于米的HM信号，以在子网中对其配置进行远程测量。 “探测” - 使用HM轮询来诊断馈线故障的位置。 “派生时间” - 主要导出入站消息框架的定时。 “速率适配” - 根据消息流量控制要求和电力线分配拓扑，将HM信道数量的混合分配到出站/入站比例。 “基于优先/噪声的适应” - 根据消息优先级或噪声条件，将不同数量的HM信道分配到出站/入站比例。

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