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1.发明授权Digital communications modulator having a modulation processor which supports high data rates 失效具有支持高数据速率的调制处理器的数字通信调制器公开(公告)号：US06337606B1
公开(公告)日：2002-01-08
申请号：US09241697
申请日：1999-02-02
IPC分类号： H04L2720
CPC分类号： H04L25/03834 , H04L27/2071
摘要： An IC modulation processor (28) may be configured to operate in a single chip mode to accommodate baud rates up to a maximum clock rate for the processor (28) and in a dual chip mode to accommodate baud rates in excess of the maximum clock rate. The IC modulation processor (28) performs digital processing on a communication signal which conveys an input data stream (22). A pulse shaping filter (54-57) is provided following a phase mapper (50). The pulse shaping filter (54-57) is implemented as a pair of half-filters. Pulse shaping is distributed between two IC modulation processors (28) in the dual chip mode. An interpolator (86) and linearizer (106) follow the pulse shaping filters (54-57).
摘要翻译： IC调制处理器（28）可以被配置为以单芯片模式操作以适应处理器（28）的最大时钟速率的波特率，并且以双芯片模式适应超过最大时钟速率的波特率 。 IC调制处理器（28）对传送输入数据流（22）的通信信号执行数字处理。 在相位映射器（50）之后提供脉冲整形滤波器（54-57）。 脉冲整形滤波器（54-57）被实现为一对半滤波器。 在双芯片模式下，脉冲整形分布在两个IC调制处理器（28）之间。 内插器（86）和线性化器（106）跟随脉冲整形滤波器（54-57）。
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2.发明授权
公开(公告)号：US6128282A
公开(公告)日：2000-10-03
申请号：US994002
申请日：1997-12-18
CPC分类号： H04Q11/0478 , H04L2012/5612
摘要： A node controller (30) within a data communication network (22) provides network access for a digital data stream (32). A processor (42) partitions the digital data stream (32) into a constant data rate component (44) having a predictable data rate and a data packet component (46) having an unpredictable data rate. The constant data rate component (44) is then transferred over a first portion (74) of a network data stream (26) reserved for a circuit transmission protocol, and the data packet component (46) is packetized and transferred over a second portion (76) of the network data stream (26) reserved for a packet transmission protocol.
摘要翻译： 数据通信网络（22）内的节点控制器（30）为数字数据流（32）提供网络接入。 处理器（42）将数字数据流（32）分割成具有可预测数据速率的恒定数据速率分量（44）和具有不可预测数据速率的数据分组分量（46）。 恒定数据速率分量（44）然后通过为电路传输协议保留的网络数据流（26）的第一部分（74）传送，并且数据分组组件（46）被分组化并在第二部分 76）被保留用于分组传输协议的网络数据流（26）。
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公开(公告)号：US5671257A
公开(公告)日：1997-09-23
申请号：US468921
申请日：1995-06-06
CPC分类号： H04L7/0054 , H03L7/087 , H04L7/0334 , H03L7/091 , H04L7/0083
摘要： A digital communication receiver (10) takes one complex sample (20) of a baseband analog signal (12) per symbol. A rectangular to polar converter (26) separates phase attributes of the complex samples from magnitude attributes. A phase processor (28) identifies clock adjustment opportunities which occur when relatively large phase changes take place between consecutive symbols. A magnitude processor (32) influences symbol timing only during clock adjustment opportunities. The magnitude processor (32) advances symbol timing in a phase locked loop when decreasing magnitude changes are detected during clock adjustment opportunities and retards symbol timing when increasing magnitude changes are detected during clock adjustment opportunities. An interpolator (66) may be used to estimate magnitude values between samples so that magnitude change is determined between sampled magnitude values and estimated magnitude values.
摘要翻译： 数字通信接收机（10）每个符号采用基带模拟信号（12）的一个复样本（20）。 矩形到极化转换器（26）将复数样本的相位属性与幅度属性分开。 相位处理器（28）识别在相邻符号之间发生相对大的相位变化时发生的时钟调整机会。 幅度处理器（32）仅在时钟调整机会期间影响符号定时。 当在时钟调整机会期间检测到减小的幅度变化时，幅度处理器（32）在锁相环中提前符号定时，并且在时钟调整机会期间检测到增加幅度变化时延迟符号定时。 可以使用内插器（66）来估计样本之间的幅度值，使得在采样的幅度值和估计的幅度值之间确定幅度变化。
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公开(公告)号：US4531224A
公开(公告)日：1985-07-23
申请号：US507193
申请日：1983-06-23
IPC分类号： H04L7/027 , H04L27/00 , H04L27/227 , H03D3/06 , H04L7/02
CPC分类号： H04L7/0274 , H04L27/2273 , H04L2027/0067
摘要： A low SNR symbol synchronizer utilizes two quadrature channels and a delay and multiply technique to produce four product signals. Two of the product signals are same-channel products and two are cross-channel products. When combined and applied to a synchronizing apparatus such as a Costas loop, the signals provide improved performance at low SNR and avoid the need to know the carrier frequency when setting the delay.
摘要翻译： 低SNR符号同步器利用两个正交信道和延迟和乘法技术来产生四个乘积信号。 两个产品信号是同频道产品，另外两个是交叉通道产品。 当组合并应用于诸如科斯塔斯环路的同步装置时，该信号在低SNR下提供改进的性能，并且避免在设置延迟时知道载波频率。
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5.发明授权
公开(公告)号：US4486846A
公开(公告)日：1984-12-04
申请号：US392852
申请日：1982-06-28
CPC分类号： G06F1/0356 , G06F2101/04
摘要： A numerically controlled oscillator wherein only one quadrant of a sinusoidially shaped wave is stored in a read-only-memory and the address of the read-only-memory is generated so that the entire numerically controlled oscillator and the read-only memory are contained on a single semiconductor chip. The data required to reproduce the quadrant is stored in a decomposed format so as to reduce the size of the read-only-memory.
摘要翻译： 一个数控振荡器，其中只有一个正弦形波的一个象限被存储在只读存储器中，并且产生只读存储器的地址，使得整个数控振荡器和只读存储器被包含在 单个半导体芯片。 复制象限所需的数据以分解格式存储，以减小只读存储器的大小。
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公开(公告)号：US07869767B2
公开(公告)日：2011-01-11
申请号：US12333736
申请日：2008-12-12
IPC分类号： H04B17/00
CPC分类号： H03G3/3047 , H03F1/0205 , H03F3/24 , H03F2200/165 , H03F2200/258 , H03G3/3042 , H04B1/0475 , H04L27/2624
摘要： A signal processing system according to various aspects of the present invention includes an excursion signal generator, a scaling system and a filter system. The excursion signal generator identifies a peak portion of a signal that exceeds a threshold and generates a corresponding excursion signal. The scaling system applies a real scale factor to contiguous sets of excursion samples in order to optimize peak-reduction performance. The filter system filters the excursion signal to remove unwanted frequency components from the excursion signal. The filtered excursion signal may then be subtracted from a delayed version of the original signal to reduce the peak. The signal processing system may also control power consumption by adjusting the threshold. The signal processing system may additionally adjust the scale of the excursion signal and/or individual channel signals, such as to meet constraints on channel noise and output spectrum, or to optimize peak reduction. The magnitude threshold, excursion signal and/or individual channel signals may also be adaptively adjusted based on, for example, a channel signal quality such as a noise level specification.
摘要翻译： 根据本发明的各个方面的信号处理系统包括偏移信号发生器，缩放系统和滤波器系统。 偏移信号发生器识别超过阈值的信号的峰值部分，并产生相应的偏移信号。 缩放系统将实际比例因子应用于连续的偏移样本集，以优化峰值降低性能。 滤波器系统对偏移信号进行滤波以从偏移信号中去除不需要的频率分量。 然后可以从原始信号的延迟版本中减去滤波的偏移信号以减小峰值。 信号处理系统还可以通过调整阈值来控制功耗。 信号处理系统可以另外调整偏移信号和/或单个信道信号的比例，例如以满足对信道噪声和输出频谱的约束，或者优化峰值减小。 幅度阈值，偏移信号和/或单个信道信号也可以基于例如诸如噪声电平指定的信道信号质量自适应地调整。
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公开(公告)号：US07751786B2
公开(公告)日：2010-07-06
申请号：US12333847
申请日：2008-12-12
IPC分类号： H04B17/00
CPC分类号： H03G3/3047 , H03F1/0205 , H03F3/24 , H03F2200/165 , H03F2200/258 , H03G3/3042 , H04B1/0475 , H04L27/2624
摘要： A signal processing system according to various aspects of the present invention includes an excursion signal generator, a scaling system and a filter system. The excursion signal generator identifies a peak portion of a signal that exceeds a threshold and generates a corresponding excursion signal. The scaling system applies a real scale factor to contiguous sets of excursion samples in order to optimize peak-reduction performance. The filter system filters the excursion signal to remove unwanted frequency components from the excursion signal. The filtered excursion signal may then be subtracted from a delayed version of the original signal to reduce the peak. The signal processing system may also control power consumption by adjusting the threshold. The signal processing system may additionally adjust the scale of the excursion signal and/or individual channel signals, such as to meet constraints on channel noise and output spectrum, or to optimize peak reduction. The magnitude threshold, excursion signal and/or individual channel signals may also be adaptively adjusted based on, for example, a channel signal quality such as a noise level specification.
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公开(公告)号：US20090097581A1
公开(公告)日：2009-04-16
申请号：US12335969
申请日：2008-12-16
CPC分类号： H03G3/3047 , H03F1/0205 , H03F3/24 , H03F2200/165 , H03F2200/258 , H03G3/3042 , H04B1/0475 , H04L27/2624
摘要： A signal processing system according to various aspects of the present invention includes an excursion signal generator, a scaling system and a filter system. The excursion signal generator identifies a peak portion of a signal that exceeds a threshold and generates a corresponding excursion signal. The scaling system applies a real scale factor to contiguous sets of excursion samples in order to optimize peak-reduction performance. The filter system filters the excursion signal to remove unwanted frequency components from the excursion signal. The filtered excursion signal may then be subtracted from a delayed version of the original signal to reduce the peak. The signal processing system may also control power consumption by adjusting the threshold. The signal processing system may additionally adjust the scale of the excursion signal and/or individual channel signals, such as to meet constraints on channel noise and output spectrum, or to optimize peak reduction. The magnitude threshold, excursion signal and/or individual channel signals may also be adaptively adjusted based on, for example, a channel signal quality such as a noise level specification.
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公开(公告)号：US07295816B2
公开(公告)日：2007-11-13
申请号：US10732390
申请日：2003-12-09
CPC分类号： H04B1/0475
摘要： A communication and/or amplifier system according to various aspects of the present invention includes an excursion signal generator and a filter system. The excursion signal generator identifies a peak portion of a signal that exceeds a threshold, such as a magnitude threshold. The filter system filters a corresponding excursion signal having a magnitude and waveform corresponding to the portion exceeding the threshold to remove unwanted frequency components from a delayed version of the excursion signal. The filtered excursion signal may then be subtracted from the original signal to reduce the peak. In one embodiment, the communication and/or amplifier system operates in conjunction with signals having multiple channels and subchannels. The system may include a magnitude adjustment system configured to adjust magnitudes of the excursion signal subchannels according to magnitudes of the first signal subchannels. The system may also adjust the excursion signal magnitude in a time division environment according to the magnitude of the original signal in the same time slot.
摘要翻译： 根据本发明的各个方面的通信和/或放大器系统包括偏移信号发生器和滤波器系统。 偏移信号发生器识别超过阈值（例如幅度阈值）的信号的峰值部分。 滤波器系统对具有对应于超过阈值的部分的幅度和波形的对应偏移信号进行滤波，以从偏移信号的延迟版本中去除不需要的频率分量。 然后可以从原始信号中减去滤波的偏移信号以减小峰值。 在一个实施例中，通信和/或放大器系统结合具有多个信道和子信道的信号进行操作。 系统可以包括幅度调整系统，其被配置为根据第一信号子信道的幅度来调整偏移信号子信道的幅度。 该系统还可以根据相同时隙中原始信号的幅度在时分环境中调整偏移信号幅度。
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10.发明授权Method for baud-clock phase synchronization in a TDMA digital communications system and apparatus therefor 失效TDMA数字通信系统中波特率相位同步的方法及其装置公开(公告)号：US06452948B1
公开(公告)日：2002-09-17
申请号：US09095116
申请日：1998-06-10
IPC分类号： H04B138
CPC分类号： H04W56/0035 , H04B7/2681 , H04L7/0029 , H04L7/0091
摘要： A time division multiple access digital communications system (12) is provided. The system (12) has a base station (14) configured to generate a receive baud clock (86) and has a receiver (18) and a transmitter (20). The system also has a subscriber unit (16) configured to generate a transmit baud clock (50), and has a transmitter (28) and a receiver (26). The subscriber unit transmitter (28) is configured to transmit a reverse channel signal (54) that incorporates the transmit baud clock (50) as a component thereof. The base station receiver (18) is configured to receive the reverse channel signal (54) from the subscriber unit (16) and produce a phase-error signal (&mgr;′) in response to a phase difference between the transmit baud clock (50) and the receive baud clock (86). The base station transmitter (20) is configured to transmit the phase-error signal (&mgr;′) to the subscriber unit receiver (26). The subscriber unit transmitter (28) contains an interpolator (122) configured to adjust the phase of the transmit baud clock (50) in response to the phase-error signal.
摘要翻译： 提供了一种时分多址数字通信系统（12）。 系统（12）具有被配置为产生接收波特率时钟（86）并具有接收机（18）和发射机（20）的基站（14）。 该系统还具有用于生成发射波特率时钟（50）的用户单元（16），并且具有发射机（28）和接收机（26）。 用户单元发射机（28）被配置为发送包含发射波特率时钟（50）作为其组成部分的反向信道信号（54）。 基站接收器（18）被配置为从用户单元（16）接收反向信道信号（54），并且响应于发射波特率时钟（50）之间的相位差产生相位误差信号（mu'）， 和接收波特率时钟（86）。 基站发射机（20）被配置为向用户单元接收机（26）发送相位误差信号（mu'）。 用户单元发射器（28）包含被配置为响应于相位误差信号调整发射波特率时钟（50）的相位的内插器（122）。
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