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公开(公告)号：US20050005205A1
公开(公告)日：2005-01-06
申请号：US10611074
申请日：2003-07-01
IPC分类号： G06F11/00 , G06K5/04 , G11B5/00 , G11B20/20 , H03M13/00 , H03M13/03 , H04B20060101 , H04J13/00 , H04J13/04 , H04L12/56
摘要： The disclosed embodiments relate to a communication system comprising a transmitter that is adapted to transmit a data signal that is broken into a plurality of time slots. The transmitter is adapted to insert communication data into a subset of the plurality of time slots and to create null data representative of information about the communication system. The null data is inserted into a subset of the plurality of time slots not occupied by communication data. Other disclosed embodiments relate to a communication system comprising a receiver that is adapted to receive a data signal that is broken into a plurality of time slots. The receiver is adapted to identify correlation peaks in the data signal that correspond to a subset of the plurality of time slots, the subset of the plurality of time slots including null data representative of information about the communication system. The receiver may associate logical values with the correlation peaks and decode the logical values to obtain the information about the communication system.
摘要翻译： 所公开的实施例涉及包括发射机的通信系统，发射机适于发射被分解成多个时隙的数据信号。 发射器适于将通信数据插入到多个时隙的子集中，并且创建表示关于通信系统的信息的空数据。 空数据被插入到未被通信数据占用的多个时隙的子集中。 其他公开的实施例涉及一种通信系统，其包括适于接收被分解成多个时隙的数据信号的接收机。 接收器适于识别数据信号中对应于多个时隙的子集的相关峰值，多个时隙的子集包括表示关于通信系统的信息的空数据。 接收机可以将逻辑值与相关峰值相关联，并解码逻辑值以获得关于通信系统的信息。
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公开(公告)号：US06816548B1
公开(公告)日：2004-11-09
申请号：US09102885
申请日：1998-06-23
IPC分类号： H04H740
CPC分类号： H04N5/211
摘要： An adaptive channel equalizer (50) for processing a demodulated VSB signal containing terrestrial broadcast high definition television information includes an adaptive feed forward filter (FFF 20) and an adaptive decision feedback filter (DFF 30). The equalizer is preceded by a demodulator/carrier recovery network (18) and does not include a carrier recovery function in the equalizer control loop. The equalizer FFF and DFF elements operate adaptively in blind, training, and decision-directed modes. A direct connection provided from the equalizer output to the DFF facilitates coarse signal acquisition and equalization during the blind operating mode.
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3.发明申请公开(公告)号：US20070195903A1
公开(公告)日：2007-08-23
申请号：US11579220
申请日：2005-04-18
CPC分类号： H04L25/03019 , H04L25/03038 , H04L25/0305 , H04L2025/03382 , H04L2025/0342 , H04L2025/03477 , H04L2025/03617 , H04L2025/03687 , H04L2025/03694
摘要： An ATSC (Advanced Television Systems Committee-Digital Television) receiver comprises an equalizer and a controller. The equalizer provides a sequence of received signal points from a constellation space, the constellation space having an inner region and one, or more, outer regions. The controller provides a coefficient gain value for use in adjusting tap coefficient values of the equalizer, wherein the coefficient gain value is as a function of which region of the constellation space the received signal points fall within.
摘要翻译： ATSC（高级电视系统委员会 - 数字电视）接收机包括均衡器和控制器。 均衡器提供来自星座空间的接收信号点的序列，星座空间具有内部区域和一个或多个外部区域。 控制器提供用于调整均衡器的抽头系数值的系数增益值，其中系数增益值作为接收信号点落在其中的星座空间的哪个区域的函数。
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公开(公告)号：US07174494B2
公开(公告)日：2007-02-06
申请号：US10611074
申请日：2003-07-01
IPC分类号： H03M13/00
摘要： A communication system comprising a transmitter that is adapted to transmit a data signal that is broken into a plurality of time slots. The transmitter inserts communication data into a subset of the plurality of time slots and to create null data representative of information about the communication system. The null data is inserted into a subset of the plurality of time slots not occupied by communication data. A communication system comprising a receiver that receives a data signal that is broken into a plurality of time slots. The receiver identifies correlation peaks in the data signal that correspond to a subset of the plurality of time slots, the subset of the plurality of time slots including null data representative of information about the communication system. The receiver may associate logical values with the correlation peaks and decode the logical values to obtain the information about the communication system.
摘要翻译： 一种通信系统，包括适于发送被分解成多个时隙的数据信号的发射机。 发射机将通信数据插入到多个时隙的子集中，并创建表示关于通信系统的信息的空数据。 空数据被插入到未被通信数据占用的多个时隙的子集中。 一种通信系统，包括接收被分解成多个时隙的数据信号的接收机。 所述接收机识别所述数据信号中对应于所述多个时隙的子集的相关峰值，所述多个时隙的子集包括表示关于所述通信系统的信息的空数据。 接收机可以将逻辑值与相关峰值相关联，并解码逻辑值以获得关于通信系统的信息。
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公开(公告)号：US5712873A
公开(公告)日：1998-01-27
申请号：US655269
申请日：1996-06-04
CPC分类号： H04N5/211
摘要： A digital high definition television receiver equalizer system includes an input adaptive feed forward filter (FFF 20), a carrier recovery network (46), and a slicer (40) in addition to an adaptive decision feedback filter (DFF, 30) for removing intersymbol interference. At the beginning of a blind equalizing interval the FFF is not adapted and the DFF operates as a linear filter with adapted coefficients for equalizing post-ghosts. Afterwards in the blind interval the FFF coefficients are adapted blindly for equalizing pre-ghosts. In a subsequent decision-directed mode the slicer output is used for adapting both the FFF and DFF non-linearly.
摘要翻译： 除了用于去除符号的自适应判决反馈滤波器（DFF，30）之外，数字高清晰度电视接收机均衡器系统还包括输入自适应前馈滤波器（FFF 20），载波恢复网络（46）和限幅器（40） 干扰。 在盲均衡间隔开始时，FFF不适用，并且DFF作为具有用于均衡后重影的适应系数的线性滤波器操作。 在盲区间后，FFF系数盲目适应均衡前鬼。 在随后的决策模式中，限幅器输出用于非线性地适应FFF和DFF两者。
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公开(公告)号：US07085282B2
公开(公告)日：2006-08-01
申请号：US10611577
申请日：2003-07-01
CPC分类号： H04L1/0065 , H04L1/0041 , H04L1/0045 , H04L1/0075
摘要： The disclosed embodiments relate to a system for generating forward error correction (FEC) packets. The system includes a first FEC encoder that receives data and encodes first FEC data with the data to form FEC encoded data. Also included in the system is a second FEC encoder that encodes the FEC encoded data to produce second FEC data. An FEC packet formatter formats the second FEC data into an FEC packet.
摘要翻译： 所公开的实施例涉及用于产生前向纠错（FEC）分组的系统。 该系统包括第一FEC编码器，其接收数据并且与第一FEC数据一起编码以形成FEC编码数据。 系统中还包括第二FEC编码器，其对FEC编码数据进行编码以产生第二FEC数据。 FEC分组格式化器将第二FEC数据格式化成FEC分组。
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公开(公告)号：US07042925B2
公开(公告)日：2006-05-09
申请号：US10372623
申请日：2003-02-24
IPC分类号： H04L27/30
CPC分类号： H04B1/7085 , H03G3/3052 , H04B1/708 , H04B2201/70701 , H04L1/0045
摘要： There is provided a correlation method for spread spectrum signals. Correlation peaks in packet headers included in the spread spectrum signals are detected by averaging known signals that repeat in the packet headers. Data corresponding to the spread spectrum signals is recovered based on the correlation peaks.
摘要翻译： 提供了扩频信号的相关方法。 包含在扩展频谱信号中的分组报头中的相关峰值通过对分组报头中重复的已知信号进行平均来检测。 基于相关峰恢复对应于扩频信号的数据。
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公开(公告)号：US06693958B1
公开(公告)日：2004-02-17
申请号：US09218186
申请日：1998-12-22
申请人： Tian Jun Wang , Dong-Chang Shiue , Adolf D'Souza
发明人： Tian Jun Wang , Dong-Chang Shiue , Adolf D'Souza
IPC分类号： H04L2503
CPC分类号： H04H40/18 , H04L25/03057 , H04L2025/03382 , H04L2025/0349 , H04L2025/03617 , H04L2025/0363 , H04L2025/03726 , H04L2025/03789 , H04N5/211
摘要： An adaptive channel equalizer (50) for processing a demodulated VSB signal containing terrestrial broadcast high definition television information operates adaptively in blind, training, and decision-directed modes. The VSB signal is characterized by a data frame format (FIG. 2) constituted by a succession of data fields each containing a data segment prefaced by a field sync segment. Equalization is expedited by recycling (35) received training data through the equalizer more than once during a VSB data field after a field sync segment is detected.
摘要翻译： 用于处理包含地面广播高分辨率电视信息的解调的VSB信号的自适应信道均衡器（50）在盲目，训练和决策导向模式中自适应地进行操作。 VSB信号的特征在于由一系列数据字段构成的数据帧格式（图2），每个数据字段包含以字段同步段为前缀的数据段。 在检测到场同步段之后的VSB数据场期间，通过均衡器多次接收（35）接收到的训练数据来加速均衡。
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公开(公告)号：US06470005B1
公开(公告)日：2002-10-22
申请号：US09222389
申请日：1998-12-29
IPC分类号： H04B7212
CPC分类号： H04L27/0014 , H04L2027/0022
摘要： A wireless telephone system having a plurality of wireless handsets and a base unit, the base unit having a base transceiver. Each handset has a handset transceiver for establishing a wireless link over a shared channel with the base unit via the base transceiver, wherein the base transceiver transmits to a given handset transceiver a forward signal at a carrier frequency. Each handset transceiver has a receiver having a carrier tracking loop for detecting and removing a carrier offset from the forward signal; a transmitter for transmitting to the base transceiver a return signal; and an oscillator, independent of a base oscillator of the base transceiver on which the carrier frequency is based, for driving the receiver and transmitter of the handset. The handset transmitter comprises a prerotator that prerotates the return signal in accordance with the carrier offset detected by the carrier tracking loop so that the return signal will be received by the base transceiver with substantially no carrier offset.
摘要翻译： 一种具有多个无线手机和基本单元的无线电话系统，所述基座单元具有基座收发器。 每个手机具有手持收音机，用于通过基本收发器与基本单元在共享信道上建立无线链路，其中基站收发器向载波收发信机发送载波频率的前向信号。 每个手持机收发器具有接收机，其具有载波跟踪环路，用于检测和去除来自前向信号的载波偏移; 用于向所述基站收发信机发送返回信号的发射机; 以及独立于载波频率所基于的基站收发信机的基本振荡器的振荡器，用于驱动手机的接收机和发射机。 手机发射机包括预驱动器，其根据由载波跟踪环路检测到的载波偏移来预转接返回信号，使得基本收发信机将基本上没有载波偏移接收返回信号。
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10.发明申请公开(公告)号：US20090285274A1
公开(公告)日：2009-11-19
申请号：US11579022
申请日：2005-04-18
IPC分类号： H04B17/00
CPC分类号： H04L25/03019 , H04L2025/03382 , H04L2025/0342 , H04L2025/037 , H04L2025/03732
摘要： An ATSC (Advanced Television Systems Committee-Digital Television) receiver comprises an equalizer and a lock detector. The equalizer provides a sequence of received signal points from a constellation space, the constellation space having an inner region and one, or more, outer regions. The lock detector determines equalizer lock as a function of the number of received signal points falling in the one, or more, outer regions.
摘要翻译： ATSC（高级电视系统委员会 - 数字电视）接收机包括均衡器和锁定检测器。 均衡器提供来自星座空间的接收信号点的序列，星座空间具有内部区域和一个或多个外部区域。 锁定检测器确定作为落入一个或多个外部区域中的接收信号点的数量的函数的均衡器锁定。
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