公开(公告)号：US20240214155A1

公开(公告)日：2024-06-27

申请号：US18069632

申请日：2022-12-21

申请人： QUALCOMM Incorporated

发明人： Ronen SHAKED ,  Gideon Shlomo KUTZ

IPC分类号： H04L5/00 ,  H04B1/68

CPC分类号： H04L5/0053 ,  H04B1/68 ,  H04L5/0092

摘要： Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a frequency dependent residual side band (FDRSB) training signal on a first set of subcarriers that are lower than a carrier frequency and on a second set of subcarriers that are higher than the carrier frequency, a mirror of the first set of subcarriers about the carrier frequency being non-overlapping with the second set of subcarriers. The UE may receive an indication of FDRSB correction that is based at least in part on the FDRSB training signal. Numerous other aspects are described.

公开(公告)号：US20160269855A1

公开(公告)日：2016-09-15

申请号：US15163468

申请日：2016-05-24

申请人： LANDIS+GYR AG

发明人： Heinz Hohl

IPC分类号： H04W4/00 ,  H04W76/02 ,  H04L5/14 ,  H04L12/733 ,  H04B3/23

CPC分类号： H04B3/23 ,  H04B1/68 ,  H04L5/14 ,  H04L29/08009 ,  H04L45/122 ,  H04L69/32 ,  H04L69/322 ,  H04W4/80 ,  H04W76/14 ,  H04W80/00 ,  Y02D70/144 ,  Y02D70/162

摘要： A radio network having a low power consumption includes a first physical transmission unit, a first data link unit, and a first network unit connected to the first physical transmission unit and to the first data link unit. Between the first data link unit and the first network unit, a first network link is adapted to communicate with a second network link via a subsequent connection structure, such that a second network unit is connected to the first network unit.

摘要翻译： 具有低功耗的无线电网络包括第一物理传输单元，第一数据链路单元和连接到第一物理传输单元和第一数据链路单元的第一网络单元。 在第一数据链路单元和第一网络单元之间，第一网络链路适于经由后续连接结构与第二网络链路通信，使得第二网络单元连接到第一网络单元。

公开(公告)号：US20160164569A1

公开(公告)日：2016-06-09

申请号：US14560834

申请日：2014-12-04

申请人： RAYTHEON COMPANY

发明人： Matthew A. Morton ,  Tina P. Srivastava

IPC分类号： H04B1/68 ,  H04B15/04

CPC分类号： H04B1/68 ,  H04B1/30 ,  H04B15/04

摘要： A frequency conversion system with improved performance. In one embodiment an image reject mixer is used to perform frequency conversion providing an initial degree of suppression of the image and local oscillator leakage signals, and a signal to noise enhancer (SNE) is used to further suppress the image and local oscillator signals, the signal to noise enhancer being a nonlinear passive device that attenuates low-power signals while transmitting high power signals with little loss. The signal to noise enhancer may be fabricated as a thin film of yttrium iron garnet (YIG) epitaxially grown on a gadolinium gallium garnet (GGG) substrate, the GGG substrate secured to a microwave transmission line from the input to the output of the signal to noise enhancer, such that the thin film of yttrium iron garnet is close to the transmission line.

摘要翻译： 具有改进性能的变频系统。 在一个实施例中，使用图像抑制混频器来执行频率转换，提供图像的初始抑制程度和本地振荡器泄漏信号，并且使用信噪比增强器（SNE）来进一步抑制图像和本地振荡器信号， 信噪比增强器是一种非线性无源器件，可在损耗较小的功率信号的同时衰减低功率信号。 信号噪声增强器可以制造为在钆镓石榴石（GGG）衬底上外延生长的钇铁石榴石（YIG）的薄膜，GGG衬底固定到微波传输线，从输入到信号的输出到 噪声增强器，使得钇铁石榴石的薄膜接近传输线。

公开(公告)号：US08179980B2

公开(公告)日：2012-05-15

申请号：US11724364

申请日：2007-03-15

申请人： Allen LeRoy Limberg

发明人： Allen LeRoy Limberg

IPC分类号： H04N7/12

CPC分类号： H04B1/66 ,  H04B1/68

摘要： Electromagnetic signals for transmitting television and other information more robustly have amplitudes modulated in accordance with a digital signal generated by convolutional interleaving and trellis coding of segments of successive data fields, each of which segments contains a prescribed number of bytes. In improvements of these signals, respective fractional portions of a Reed-Solomon forward-error-correction codeword are transmitted in respective ones of a plurality of the segments of the successive data fields. The respective ones of the plurality of segments are separated from each other within the successive data fields, such that their individual bytes do not interleave with each other after the convolutional interleaving and trellis coding are completed.

摘要翻译： 用于传输电视和其他信息的电磁信号更鲁棒地具有根据由卷积交织产生的数字信号和连续数据字段的网格编码进行调制的幅度，每个片段包含规定数量的字节。 在这些信号的改进中，Reed-Solomon前向纠错码字的相应小数部分在连续数据字段的多个段中的相应数据段中被发送。 多个片段中的相应片段在连续的数据字段内彼此分离，使得它们的各个字节在卷积交织和格状编码完成之后彼此不交错。

公开(公告)号：US07277481B2

公开(公告)日：2007-10-02

申请号：US10830827

申请日：2004-04-23

申请人： Loke Kun Tan ,  Tian-Min Liu ,  Hing “Ada” T. Hung

发明人： Loke Kun Tan ,  Tian-Min Liu ,  Hing “Ada” T. Hung

IPC分类号： H03H7/30

CPC分类号： H04N5/46 ,  H04B1/68 ,  H04L25/03057 ,  H04L27/02 ,  H04L27/066 ,  H04L27/2273 ,  H04L27/3427 ,  H04L27/3827 ,  H04L2025/03382 ,  H04L2025/0342 ,  H04L2025/0349 ,  H04L2025/03503 ,  H04L2027/0032 ,  H04L2027/0042 ,  H04L2027/0057 ,  H04L2027/0067 ,  H04L2027/0087 ,  H04N5/21 ,  H04N5/211 ,  H04N5/44 ,  H04N5/4401 ,  H04N11/002

摘要： A system for reducing the complexity of an adaptive decision feedback equalizer, for use in connection with a dual-mode QAM/VSB receiver system is disclosed. QAM and VSB symbols, which are expressed in two's compliment notation, include an extra bit required to compensate for a fixed offset term introduced by the two's compliment numbering system. A decision feedback equalizer includes a decision feedback filter section which operates on symbolic decisions represented by a wordlength which excludes the added bit representing the offset. The vestigal word is convolved with the decision feedback filter's coefficients, while a DC component, corresponding to the excluded bit, is convolved with the same coefficient values in a correction filter. The two values are summed to provide an ISI compensation signal at the input of a decision device such as a slicer. A DC component representing a pilot tone in VSB transmission systems also introduces a DC component, and additional bits, to a VSB wordlength. These additional bits are similarly excluded and the vestigal representation convolved with coefficient values in a decision feedback filter. The DC component, including the pilot tone representation, is convolved with the same coefficient values in a correction filter.

摘要翻译： 公开了一种用于降低自适应判决反馈均衡器的复杂性的系统，用于与双模式QAM / VSB接收机系统相结合。 以二进制符号表示的QAM和VSB符号包括补偿由二进制编号系统引入的固定偏移项所需的额外位。 判决反馈均衡器包括判定反馈滤波器部分，其对由字长表示的符号决定进行操作，该字长不包括表示偏移量的相加位。 遗留词与决策反馈滤波器的系数进行卷积，而对应于排除比特的DC分量与校正滤波器中的相同系数值进行卷积。 将两个值相加以在诸如限幅器的决定装置的输入处提供ISI补偿信号。 表示VSB传输系统中的导频音的DC分量还将DC分量和附加比特引入VSB字长。 类似地排除这些附加位，并且在判决反馈滤波器中与系数值卷积的残余表示。 包括导频音表示的DC分量在校正滤波器中与相同的系数值进行卷积。

公开(公告)号：US20070081595A1

公开(公告)日：2007-04-12

申请号：US11428317

申请日：2006-06-30

申请人： In Hwan Choi ,  Kyung Kang ,  Kook Kwak ,  Young Hong ,  Sung Hong

发明人： In Hwan Choi ,  Kyung Kang ,  Kook Kwak ,  Young Hong ,  Sung Hong

IPC分类号： H04N7/12 ,  H04L23/02

CPC分类号： H04N19/66 ,  H04B1/68 ,  H04N19/46 ,  H04N21/23614 ,  H04N21/2383 ,  H04N21/262 ,  H04N21/4348 ,  H04N21/4382 ,  H04N21/6547

摘要： A digital television (DTV) transmitter and a method of coding data in the DTV transmitter method are disclosed. A pre-processor pre-processes the enhanced data by coding the enhanced data for forward error correction (FEC) and expanding the FEC-coded enhanced data. A data formatter generates one or more groups of enhanced data packets, each enhanced data packet including the pre-processed enhanced data. And, a packet multiplexer generates at least one burst of enhanced data by multiplexing the one or more groups of enhanced data packets. Herein, each burst of enhanced data includes at least one group of enhanced data packets. The DTV transmitter may further include a scheduler which generates first and second control signals to control operations of the data formatter and the packet multiplexer, respectively.

摘要翻译： 公开了一种数字电视（DTV）发射机和DTV发射机方法中的数据编码方法。 预处理器通过对用于前向纠错（FEC）的增强数据进行编码并扩展FEC编码的增强数据来预处理增强数据。 数据格式化器生成一组或多组增强数据分组，每个增强数据分组包括预处理的增强数据。 并且，分组多路复用器通过复用一组或多组增强数据分组来产生增强数据的至少一个突发。 这里，增强数据的每个突发包括至少一组增强数据分组。 DTV发射机还可以包括调度器，其分别产生第一和第二控制信号以控制数据格式化器和分组多路复用器的操作。

公开(公告)号：US20060284669A1

公开(公告)日：2006-12-21

申请号：US11510901

申请日：2006-08-28

申请人： Timothy Moore

发明人： Timothy Moore

IPC分类号： H04B1/10

CPC分类号： H04B1/7097 ,  H04B1/68 ,  H04B1/707 ,  H04B2201/709709 ,  H04L27/02

摘要： A spread spectrum noise shaper uses a modulation technique to achieve a greater signal-to-noise or signal-to-interference ratio (SNR or SIR). The technique doubles the system SIR, in principle. This doubling yields a doubling in system capacity. SNR is increased by receiving the spread spectrum signal in the presence of less noise near the edge of the spread spectrum bandwidth. The technique requires only small additions to a conventional spread spectrum system, in the form of an extra modulator at the transmitter, and an extra demodulator and filter at the receiver.

公开(公告)号：US20050105651A1

公开(公告)日：2005-05-19

申请号：US11031107

申请日：2005-01-07

申请人： Steven Jaffe ,  Tian-Min Liu ,  Loke Tan

发明人： Steven Jaffe ,  Tian-Min Liu ,  Loke Tan

IPC分类号： H04B1/68 ,  H04L25/03 ,  H04L27/00 ,  H04L27/02 ,  H04L27/06 ,  H04L27/227 ,  H04L27/34 ,  H04L27/38 ,  H04N5/21 ,  H04N5/44 ,  H04N5/46 ,  H04N11/00 ,  H04L27/14

CPC分类号： H04N21/4382 ,  H04B1/68 ,  H04L25/03057 ,  H04L27/02 ,  H04L27/066 ,  H04L27/2273 ,  H04L27/3427 ,  H04L27/3827 ,  H04L2025/03382 ,  H04L2025/0342 ,  H04L2025/0349 ,  H04L2025/03503 ,  H04L2027/0032 ,  H04L2027/0042 ,  H04L2027/0057 ,  H04L2027/0067 ,  H04L2027/0087 ,  H04N5/21 ,  H04N5/211 ,  H04N5/44 ,  H04N5/4401 ,  H04N5/46 ,  H04N11/002

摘要： A television receiver system capable of receiving and demodulating television signal information content that has been modulated and transmitted in accordance with a variety of modulation formats is disclosed. In particular, the system is able to accommodate receipt and demodulation of at least 8 and 16-VSB modulated signals in order to support US HDTV applications, as well as 64 and 256-QAM modulated signals, for European and potential US CATV implementations. The system includes carrier and timing recovery loops adapted to operate on an enhanced pilot signal as well as decision directed carrier phase recovery loops. Phase detectors operate on I and Q rail signals, or generate a Q rail from a Hilbert transform of the I rail. Decision directed loops incorporate a trellis decoder in order to operate on sequence estimated decisions for improved reliability in poor SNR environments.

公开(公告)号：US20040258184A1

公开(公告)日：2004-12-23

申请号：US10895879

申请日：2004-07-21

申请人： Broadcom Corporation

发明人： Tian-Min Liu ,  Loke Kun Tan ,  Steven T. Jaffe

IPC分类号： H04L027/06

CPC分类号： H04L27/3827 ,  H04B1/68 ,  H04L25/03057 ,  H04L27/02 ,  H04L27/066 ,  H04L27/2273 ,  H04L27/3427 ,  H04L2025/03382 ,  H04L2025/0342 ,  H04L2025/0349 ,  H04L2025/03503 ,  H04L2027/0032 ,  H04L2027/0042 ,  H04L2027/0057 ,  H04L2027/0067 ,  H04L2027/0087 ,  H04N5/21 ,  H04N5/211 ,  H04N5/44 ,  H04N5/4401 ,  H04N5/46 ,  H04N11/002

摘要： Improved decision feedback equalizer and decision directed timing recovery systems and methods suitable for use in connection with a dual mode QAM/VSB receiver system are disclosed. A trellis decoder operates in conjunction with a decision feedback equalizer circuit on trellis coded 8-VSB modulated signals. The trellis decoder includes a 4-state traceback memory circuit outputting a maximum likelihood decision as well as a number of intermediate decisions based upon the maximum likelihood sequence path. Any number of decisions, along the sequence, may be provided as an input signal to timing recovery system loops, with the particular decision along the sequence chosen on the basis of its delay through the trellis decoder. Variable delay circuitry is coupled to the other input of the timing recovery system loops in order to ensure that both input signals bear the same timestamp. Final decisions are output from the trellis decoder to a DFE in order to enhance the DFE's ability to operate in low SNR environments. A decision sequence estimation error signal is also generated and used to drive the tap updates of both the DFE and an FFE portion of the equalizer.

摘要翻译： 公开了改进的决策反馈均衡器和适用于与双模式QAM / VSB接收机系统相关联的决策定向定时恢复系统和方法。 网格解码器与网格编码的8-VSB调制信号上的判决反馈均衡器电路结合操作。 网格解码器包括基于最大似然序列路径输出最大似然判定以及多个中间决策的4状态追迹存储器电路。 沿序列的任何数量的决定可以作为输入信号提供给定时恢复系统循环，其中沿着根据其通过网格解码器的延迟选择的序列的特定决定。 可变延迟电路耦合到定时恢复系统回路的另一个输入，以确保两个输入信号具有相同的时间戳。 最终决策从网格解码器输出到DF​​E，以提高DFE在低SNR环境下的运行能力。 还产生判决序列估计误差信号并用于驱动均衡器的DFE和FFE部分的抽头更新。

公开(公告)号：US06771714B2

公开(公告)日：2004-08-03

申请号：US10150186

申请日：2002-05-16

申请人： Tian-Min Liu ,  Loke Kun Tan ,  Steven T. Jaffe

发明人： Tian-Min Liu ,  Loke Kun Tan ,  Steven T. Jaffe

IPC分类号： H04L2714

CPC分类号： H04N5/21 ,  H04B1/68 ,  H04L25/03057 ,  H04L27/02 ,  H04L27/066 ,  H04L27/2273 ,  H04L27/3427 ,  H04L27/3827 ,  H04L2025/03382 ,  H04L2025/0342 ,  H04L2025/0349 ,  H04L2025/03503 ,  H04L2027/0032 ,  H04L2027/0042 ,  H04L2027/0057 ,  H04L2027/0067 ,  H04L2027/0087 ,  H04N5/211 ,  H04N5/44 ,  H04N5/4401 ,  H04N5/455 ,  H04N5/46 ,  H04N11/002

摘要： Improved carrier recovery and symbol timing systems and methods suitable for use in connection with a dual-mode QAM/VSB receiver system is disclosed. Carrier and symbol timing acquisition and tracking loops are phase/frequency locked to an inserted pilot signal provided in an input VSB spectrum at a given frequency. An input spectrum is centered about baseband and the pilot is extracted by an equivalent filter which functions as a bandpass filter having pass bands centered about the pilot frequency. Since the pilot signal's frequency is given, its position in the frequency domain for any sampling frequency, is deterministic. The receiver's sampling frequency is provided such that the relationship is expressed as fc=fs/4. When tracked by a phase-lock loop, the pilot signal will appear at the correct location in the spectrum if the sampling frequency fs is correct, and will be shifted in one direction or the other if the sampling frequency fs is too high or too low.

摘要翻译： 公开了适用于双模QAM / VSB接收机系统的改进的载波恢复和符号定时系统和方法。 载波和符号定时采集和跟踪环路被相位/频率锁定到在给定频率下在输入VSB频谱中提供的插入导频信号。 输入频谱以基带为中心，并且通过等效滤波器提取导频，该等效滤波器用作具有以导频频率为中心的通带的带通滤波器。 由于给出了导频信号的频率，所以在频域中对于任何采样频率的位置是确定性的。 提供接收机的采样频率，使得该关系被表示为fc = fs / 4。 当通过锁相环路进行跟踪时，如果采样频率fs正确，则导频信号将出现在频谱中的正确位置，并且如果采样频率fs太高或太低，则导频信号将在一个方向或另一个方向上移位 。