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公开(公告)号：US06687223B1
公开(公告)日：2004-02-03
申请号：US09480487
申请日：2000-01-11
IPC分类号： H04L1226
CPC分类号： H04L47/822 , H04L47/15 , H04L47/70 , H04L47/826
摘要： A connection admission control mechanism for packet, circuit, or hybrid packet and circuit networks whereby the signaling message (i.e., “query”) delay in a control channel of a network switch is maintained (i.e., “locked”) in a timed control interval at a desired level using feedback parameters relating to an estimated current amount of delay in the packet network switch during one or more previous timed control intervals, to guarantee or closely achieve a desired signaling message or query delay performance. The processing delay of the network is bound or “locked” at a desired delay performance level based on substantially real-time estimation or measurement of the current signaling message delays of queries or call control packet streams during one or more previous control intervals. Thus, connection processing is robust against variations in traffic intensity and/or processing capabilities of the switch, and a single QoS measure or specification can be applied to the network switch. Because of the resemblance to a phase locked loop (PLL) in hardware timing acquisition techniques, the technique is referred to herein as Delay-Locked Admission Control (DLAC). The control intervals may be adjusted based on the particular application. During each control interval, a predetermined maximum number of new queries are allowed into the processing fabric of the switch. In one embodiment, the maximum number of allowed during any one control interval is initialized at start-up to a desired value, e.g., to 1, to a randomly chosen integer, or chosen according to queuing theory estimates for the particular application and/or based on current conditions.
摘要翻译： 用于分组，电路或混合分组和电路网络的连接准入控制机制，由此网络交换机的控制信道中的信令消息（即，“查询”）延迟在定时控制间隔中被维持（即，“锁定”） 使用与在一个或多个先前定时控制间隔期间的分组网络交换机中的估计的当前延迟量有关的反馈参数，以保证或紧密地实现期望的信令消息或查询延迟性能。 基于在一个或多个先前控制间隔期间的查询或呼叫控制分组流的当前信令消息延迟的基本上实时估计或测量，网络的处理延迟被绑定或“锁定”在期望的延迟性能水平。 因此，连接处理对于交换机的业务强度和/或处理能力的变化是稳健的，并且单个QoS测量或规范可以应用于网络交换机。 由于与硬件定时采集技术中的锁相环（PLL）相似，所以该技术在此被称为延迟锁定接纳控制（DLAC）。 可以基于具体应用来调整控制间隔。 在每个控制间隔期间，允许在交换机的处理结构中预定的最大数量的新查询。 在一个实施例中，在任何一个控制间隔期间允许的最大数量在启动时被初始化为期望值，例如1，到随机选择的整数，或根据特定应用的排队理论估计和/或 根据当前情况。
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公开(公告)号：US06928046B1
公开(公告)日：2005-08-09
申请号：US09304830
申请日：1999-05-05
CPC分类号： H04L27/2656 , H04L27/2678
摘要： Frame synchronization of a received OFDM signal (such as that used in a hybrid FM DAB system) is provided by filtering out significant outer frequency portions of the digital channels, and then using cyclic extension and correlation of the cyclically extended bits (or samples). The received OFDM signal is passed through a bandpass filter to remove outer digital subcarriers (i.e., those farthest from a center frequency) from a received OFDM signal before correlating to locate the OFDM frame boundaries. By filtering out digital subcarriers within each of the digital channels, particularly those closest to adjacent channels and thus most likely to be interfered with by an adjacent first channel OFDM (or FM) signal, correlation between cyclically extended bit (or sample) patterns and thus frame synchronization of OFDM signals can be improved significantly.
摘要翻译： 通过滤出数字信道的重要外频部分，然后使用循环扩展比特（或采样）的循环扩展和相关来提供接收的OFDM信号（例如在混合FM DAB系统中使用的OFDM信号）的帧同步。 所接收的OFDM信号通过带通滤波器以在相关之前从接收的OFDM信号中去除外部数字子载波（即，离中心频率最远的那些），以定位OFDM帧边界。 通过滤除每个数字信道内的数字子载波，特别是那些最接近相邻信道的数字子载波，从而最可能被相邻第一信道OFDM（或FM）信号干扰，循环扩展位（或采样）模式之间的相关性因此 可以显着提高OFDM信号的帧同步。
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3.发明授权公开(公告)号：US07359446B2
公开(公告)日：2008-04-15
申请号：US10639524
申请日：2003-08-13
申请人： Tongtong Li , Masoud Sajadieh , Mohsen Sarraf , Masood Yousefi , Robert L. Cupo , Thomas W. Goeddel
发明人： Tongtong Li , Masoud Sajadieh , Mohsen Sarraf , Masood Yousefi , Robert L. Cupo , Thomas W. Goeddel
CPC分类号： H04L1/0059 , H04L1/0054 , H04L1/0071 , H04L25/067
摘要： “Reliability-related” values are assigned to received signal samples containing noise and distortion. The samples are then sent to a Viterbi decoder in order to regenerate originally transmitted messages.
摘要翻译： “可靠性相关”值分配给包含噪声和失真的接收信号样本。 然后将样本发送到维特比解码器，以便重新生成最初发送的消息。
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公开(公告)号：US20070208988A1
公开(公告)日：2007-09-06
申请号：US11797767
申请日：2007-05-07
申请人： Ahmad Aman , Masoud Sajadieh , Mohsen Sarraf , Masood Yousefi
发明人： Ahmad Aman , Masoud Sajadieh , Mohsen Sarraf , Masood Yousefi
IPC分类号： H03M13/00
CPC分类号： H03M13/2764 , H03M13/275
摘要： Error bursts are randomized by an interleaver which makes use of “set leaders” to generate permutation indices. The permutation indices are used to route bits from initial positions in an input bit stream to re-arranged or randomized positions in an output bit stream. When the output bit stream is then transmitted and subsequently received by a de-interleaver which returns the received bits to their initial, pre-randomized positions, the resulting received signal has an acceptable bit error rate.
摘要翻译： 错误突发由交织器随机化，该交织器利用“集合领导”来产生置换索引。 置换索引用于将输入比特流中的初始位置的比特路由到输出比特流中的重新排列或随机化的位置。 当输出比特流然后被解交织器发送并随后被接收时，其将接收到的比特返回到它们的初始预随机化位置，所得到的接收信号具有可接受的比特错误率。
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公开(公告)号：US07228486B2
公开(公告)日：2007-06-05
申请号：US10620362
申请日：2003-07-17
IPC分类号： H03M13/00
CPC分类号： H03M13/2764 , H03M13/275
摘要： Error bursts are randomized by an interleaver which makes use of “set leaders” to generate permutation indices. The permutation indices are used to route bits from initial positions in an input bit stream to re-arranged or randomized positions in an output bit stream. When the output bit stream is then transmitted and subsequently received by a de-interleaver which returns the received bits to their initial, pre-randomized positions, the resulting received signal has an acceptable bit error rate.
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公开(公告)号：US20050015695A1
公开(公告)日：2005-01-20
申请号：US10620362
申请日：2003-07-17
申请人： Ahmad Aman , Masoud Sajadieh , Mohsen Sarraf , Masood Yousefi
发明人： Ahmad Aman , Masoud Sajadieh , Mohsen Sarraf , Masood Yousefi
CPC分类号： H03M13/2764 , H03M13/275
摘要： Error bursts are randomized by an interleaver which makes use of “set leaders” to generate permutation indices. The permutation indices are used to route bits from initial positions in an input bit stream to re-arranged or randomized positions in an output bit stream. When the output bit stream is then transmitted and subsequently received by a de-interleaver which returns the received bits to their initial, pre-randomized positions, the resulting received signal has an acceptable bit error rate.
摘要翻译： 错误突发由交织器随机化，该交织器利用“集合领导”来产生置换索引。 置换索引用于将输入比特流中的初始位置的比特路由到输出比特流中的重新排列或随机化的位置。 当输出比特流然后被解交织器发送并随后被接收时，其将接收到的比特返回到它们的初始预随机化位置，所得到的接收信号具有可接受的比特错误率。
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公开(公告)号：US07870462B2
公开(公告)日：2011-01-11
申请号：US11797767
申请日：2007-05-07
IPC分类号： H03M13/00
CPC分类号： H03M13/2764 , H03M13/275
摘要： Error bursts are randomized by an interleaver which makes use of “set leaders” to generate permutation indices. The permutation indices are used to route bits from initial positions in an input bit stream to re-arranged or randomized positions in an output bit stream. When the output bit stream is then transmitted and subsequently received by a de-interleaver which returns the received bits to their initial, pre-randomized positions, the resulting received signal has an acceptable bit error rate.
摘要翻译： 错误突发由交织器随机化，该交织器利用“集合领导”来产生置换索引。 置换索引用于将输入比特流中的初始位置的比特路由到输出比特流中的重新排列或随机化的位置。 当输出比特流然后被解交织器发送并随后被接收时，其将接收到的比特返回到它们的初始预随机化位置，所得到的接收信号具有可接受的比特错误率。
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8.发明申请公开(公告)号：US20050036565A1
公开(公告)日：2005-02-17
申请号：US10639524
申请日：2003-08-13
申请人： Tongtong Li , Masoud Sajadieh , Mohsen Sarraf , Masood Yousefi , Robert Cupo , Thomas Goeddel
发明人： Tongtong Li , Masoud Sajadieh , Mohsen Sarraf , Masood Yousefi , Robert Cupo , Thomas Goeddel
CPC分类号： H04L1/0059 , H04L1/0054 , H04L1/0071 , H04L25/067
摘要： “Reliability-related” values are assigned to received signal samples containing noise and distortion. The samples are then sent to a Viterbi decoder in order to regenerate originally transmitted messages.
摘要翻译： “可靠性相关”值分配给包含噪声和失真的接收信号样本。 然后将样本发送到维特比解码器，以便重新生成最初发送的消息。
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9.发明申请公开(公告)号：US20070026820A1
公开(公告)日：2007-02-01
申请号：US11189210
申请日：2005-07-26
申请人： Mohsen Sarraf
发明人： Mohsen Sarraf
CPC分类号： H04B1/707 , H04B2201/70706
摘要： Techniques to reduce signal amplitude peak-to-average ratio (PAR) in a wireless communications system are described. The apparatus may include a signal conditioning module to receive a baseband signal. The signal conditioning module may split the baseband signal along multiple paths, delay one or more of the paths, and combine the multiple paths to form a conditioned signal having lower signal amplitude PAR than the baseband signal. Other embodiments are described and claimed.
摘要翻译： 描述了在无线通信系统中降低信号幅度峰均比（PAR）的技术。 该装置可以包括用于接收基带信号的信号调节模块。 信号调理模块可以沿着多个路径分割基带信号，延迟一个或多个路径，并且组合多个路径以形成具有比基带信号更低的信号幅度PAR的调节信号。 描述和要求保护其他实施例。
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公开(公告)号：US06665356B1
公开(公告)日：2003-12-16
申请号：US09329399
申请日：1999-06-10
IPC分类号： H04L2722
CPC分类号： H04L7/0334
摘要： A phase-modulated signal such as a quadrature phase-shift-keyed (QPSK) signal in a wireless communication system is demodulated using sample timing based at least in part on frequency information generated by frequency demodulating the phase-modulated signal. The phase-modulated signal is separated into first and second portions, the first portion is phase demodulated to generate demodulated symbols, and the second portion is frequency demodulated to generate, e.g., a measure of the instantaneous frequency of the phase-modulated signal. The instantaneous frequency measure is processed to identify one or more symbol transitions, and the identified transitions are used to establish the sample timing such that proper sampling of the symbols is ensured.
摘要翻译： 至少部分地基于通过频率解调相位调制信号生成的频率信息，使用采样定时解调无线通信系统中的相位调制信号，例如正交相移键控（QPSK）信号。 相位调制信号被分离为第一和第二部分，第一部分被相位解调以产生解调符号，并且第二部分被频率解调以产生例如相位调制信号的瞬时频率的测量。 处理瞬时频率测量以识别一个或多个符号转换，并且使用所识别的转换来建立采样定时，从而确保符号的适当采样。
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