公开(公告)号：US20180248723A1

公开(公告)日：2018-08-30

申请号：US15889273

申请日：2018-02-06

申请人： Rambus Inc.

发明人： Robert E. Palmer

IPC分类号： H04L27/01 ,  H04L25/03 ,  H04L25/06

CPC分类号： H04L27/01 ,  H04L7/041 ,  H04L7/046 ,  H04L25/03006 ,  H04L25/03273 ,  H04L25/069

摘要： An integrated receiver supports adaptive receive equalization. An incoming bit stream is sampled using edge and data clock signals derived from a reference clock signal. A phase detector determines whether the edge and data clock signals are in phase with the incoming data, while some clock recovery circuitry adjusts the edge and data clock signals as required to match their phases to the incoming data. The receiver employs the edge and data samples used to recover the edge and data clock signals to note the locations of zero crossings for one or more selected data patterns. The pattern or patterns may be selected from among those apt to produce the greatest timing error. Equalization settings may then be adjusted to align the zero crossings of the selected data patterns with the recovered edge clock signal.

公开(公告)号：US20180102807A1

公开(公告)日：2018-04-12

申请号：US15589874

申请日：2017-05-08

申请人： QUALCOMM Incorporated

发明人： Wanshi Chen ,  Wei Zeng ,  Peter Gaal

IPC分类号： H04B1/7107 ,  H04L25/03 ,  H04L27/26

CPC分类号： H04B1/7107 ,  H04L25/03006 ,  H04L25/03273 ,  H04L25/0328 ,  H04L25/03821 ,  H04L27/2657 ,  H04W56/0045

摘要： Aspects of the disclosure relate to inter-link interference cancellation for reducing or mitigating interference from signals in different directions (e.g., uplink and downlink directions). A wireless communication device (i.e., a victim device subject to inter-link interference) may determine a time offset or lead time of an interfering signal from an offending device. Based on the determined time offset, the victim device may perform interference cancellation or suppression to reduce or mitigate the interference of the interfering signal. Other aspects, embodiments, and features are also claimed and described.

公开(公告)号：US20180013593A1

公开(公告)日：2018-01-11

申请号：US15468127

申请日：2017-03-24

申请人： GLOBAL UNICHIP CORPORATION ,  TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.

发明人： Yu-Chu CHEN ,  Wen-Juh KANG ,  Cheng-Hung WU

IPC分类号： H04L25/03 ,  H03K19/21 ,  H03L7/08 ,  H04L12/26

CPC分类号： H04L25/03273 ,  H03K19/21 ,  H03L7/0807 ,  H03L7/095 ,  H03L2207/14 ,  H04L7/0033 ,  H04L7/0083 ,  H04L7/033 ,  H04L7/0331

摘要： An unlock detector includes a checker, an accumulator, and a comparator. The accumulator is electrically connected to the checker, and the comparator is electrically connected to the accumulator. The checker includes several checking units. The checker is configured to receive a sampled data signal and a sampled edge signal, and to check the sampled data signal and the sampled edge signal via the checking units to generate several checking results. The accumulator is configured to generate a counting value in a manner of counting according to the checking results. The comparator is configured to compare the counting value with a threshold to generate an unlock-detecting result.

公开(公告)号：US20170366468A1

公开(公告)日：2017-12-21

申请号：US15465396

申请日：2017-03-21

申请人： Intel Corporation

发明人： Ehud SHOOR ,  Ari SHARON

IPC分类号： H04L12/863 ,  H04L1/00 ,  H04L7/033 ,  H04L25/03

CPC分类号： H04L47/6245 ,  G06F1/04 ,  G06F13/40 ,  H04B15/00 ,  H04L1/0018 ,  H04L25/03273 ,  H04L49/90

摘要： Described is a low latency re-timer for systems supporting spread spectrum clocking. The re-timer comprises: a first clock frequency estimator to estimate a frequency of a receive clock (RX CLK) and to provide a first timestamp associated with a first clock that underwent spread spectrum; a second clock frequency estimator to estimate a frequency of a transmit clock (TX CLK) and to provide a second timestamp associated with a second clock that underwent spread spectrum; and a comparator to compare the first timestamp with the second timestamp.

公开(公告)号：US09800438B1

公开(公告)日：2017-10-24

申请号：US15333505

申请日：2016-10-25

申请人： Xilinx, Inc.

发明人： Hongtao Zhang ,  Zhaoyin D. Wu ,  Christopher J. Borrelli ,  Geoffrey Zhang

IPC分类号： H04L7/00 ,  H04L25/03 ,  H04L12/26

CPC分类号： H04L25/03885 ,  G01R31/02 ,  G01R31/44 ,  H04L7/0025 ,  H04L7/0087 ,  H04L25/03273

摘要： An example method of performing an eye-scan in a receiver includes: generating digital samples from an analog signal input to the receiver based on a sampling clock, the sampling clock phase-shifted with respect to a reference clock based on a phase interpolator (PI) code; equalizing the digital samples based on first equalization parameters of a plurality of equalization parameters of the receiver; adapting the plurality of equalization parameters and performing clock recovery based on the digital samples to generate the PI code; and performing a plurality of cycles of locking the plurality of equalization parameters, suspending phase detection in the clock recovery, offsetting the PI code, collecting an output of the receiver, resuming the phase detection in the clock recovery, and unlocking the equalization parameters to perform the eye scan.

公开(公告)号：US20170264379A1

公开(公告)日：2017-09-14

申请号：US15454608

申请日：2017-03-09

申请人： QUALCOMM Incorporated

发明人： George Alan Wiley

IPC分类号： H04B17/21 ,  H04L25/03

CPC分类号： H04B17/21 ,  G06F13/4295 ,  H04L7/10 ,  H04L25/03273 ,  H04L25/14 ,  H04L25/49

摘要： Methods and apparatus are described that facilitate transmission of data, particularly between two devices within an electronic apparatus. In particular, a preamble for transmission in a sequence of symbols over a multi-wire communications interface, such as a MIPI C-PHY interface, is constructed to include one or more symbols each having a single state transition symbols for signaling a particular calibration preamble from a transmitter to a receiver over the multi-wire communications interface. The preamble, having only single state transition symbols, improves reliability of decoding the symbols at a receiver, including reception and decoding without the use of a calibration clock.

公开(公告)号：US09350588B2

公开(公告)日：2016-05-24

申请号：US14649528

申请日：2012-12-14

申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

发明人： Thomas Eriksson ,  Thomas Emanuelsson ,  Mats Rydström

IPC分类号： H03D3/00 ,  H03K9/06 ,  H04L27/18 ,  H04L27/26 ,  H04L25/03

CPC分类号： H04L27/2657 ,  H04L25/03273 ,  H04L27/2671 ,  H04L27/2675 ,  H04L27/2679 ,  H04L27/2691 ,  H04L2025/03414

摘要： A receiver for an MCM signal with pilot symbols, comprising a first phase adjustment unit for adjusting the phase of an MCM signal by means of the pilot symbols and to output a first phase adjusted MCM signal to an MCM re-modulator unit which demodulates and then modulates the first phase-adjusted MCM signal to create an MCM reference signal. The communications receiver also comprises a second phase adjustment unit which receives the first phase adjusted MCM signal and also the MCM reference signal. The second phase adjustment unit adjusts the phase of the first phase adjusted MCM signal by means of said MCM reference signal and outputs a second phase adjusted MCM signal to an output MCM demodulator which demodulates the second phase adjusted MCM signal and outputs the demodulated MCM signal.

摘要翻译： 一种用于具有导频符号的MCM信号的接收机，包括：第一相位调整单元，用于通过导频符号调整MCM信号的相位，并将第一相位调整的MCM信号输出到解调后的MCM再调制器单元 调制第一相位调整MCM信号以产生MCM参考信号。 通信接收机还包括接收第一相位调整MCM信号和MCM参考信号的第二相位调整单元。 第二相位调整单元通过所述MCM参考信号调整第一相位调整MCM信号的相位，并将第二相位调整MCM信号输出到解调第二相位调整MCM信号并输出​​解调MCM信号的输出MCM解调器。

公开(公告)号：US20160142154A1

公开(公告)日：2016-05-19

申请号：US14941472

申请日：2015-11-13

申请人： ZTE Corporation

发明人： Zhensheng Jia ,  Yi Cai

IPC分类号： H04B10/61 ,  H04L1/00 ,  H04L7/04 ,  H04L25/03

CPC分类号： H04B10/6165 ,  H04L1/0047 ,  H04L1/0054 ,  H04L7/048 ,  H04L25/03019 ,  H04L25/03267 ,  H04L25/03273 ,  H04L2025/03636

摘要： A post-equalization technique for recovering data bits from a coherent modulation optical signal is implemented in the digital domain by iteratively performing a decision-directed least mean square channel equalization step, a digital post filter step and a maximum likelihood sequence estimation step so that the symbol decisions of the previous iteration are fed to the decision directed least mean square channel equalization step to successively improve the symbol decisions. In an experimental setup, the iterative technique demonstrated performance improvement mitigating the bandwidth limitation as compared to a corresponding non-iterative technique.

摘要翻译： 通过迭代地执行决策导向的最小均方信道均衡步骤，数字后置滤波器步骤和最大似然序列估计步骤，在数字域中实现用于从相干调制光信号恢复数据比特的后均衡技术， 将先前迭代的符号决定馈送到决策导向最小均方信道均衡步骤，以连续地改进符号决定。 在实验设置中，与相应的非迭代技术相比，迭代技术显示了降低带宽限制的性能提升。

公开(公告)号：US20130184018A1

公开(公告)日：2013-07-18

申请号：US13562621

申请日：2012-07-31

申请人： Steve H. Hsu ,  Raheel Khan

发明人： Steve H. Hsu ,  Raheel Khan

IPC分类号： H04B15/00

CPC分类号： H04L25/03273 ,  H04J11/005 ,  H04L25/0328 ,  H04L27/2657

摘要： Methods and apparatus are described for interference cancellation of interference components of a time domain signal in the frequency domain. A time domain sequence is received, and a plurality of overlapping time domain segments is generated from the time domain sequence. Frequency offset compensation to compensate for frequency offset associated with a serving cell is performed in the time domain, and the overlapping time domain segments are then converted to the frequency domain. Additional frequency offset compensation may be performed to compensation for the frequency offset associated with interfering cells.

摘要翻译： 描述了用于在频域中的时域信号的干扰分量的干扰消除的方法和装置。 接收时域序列，并且从时域序列生成多个重叠的时域片段。 在时域中执行用于补偿与服务小区相关联的频率偏移的频率偏移补偿，然后将重叠的时域片段转换为频域。 可以执行额外的频率偏移补偿以补偿与干扰小区相关联的频率偏移。

公开(公告)号：US08472544B2

公开(公告)日：2013-06-25

申请号：US12860072

申请日：2010-08-20

申请人： In Hwan Choi ,  Kyung Won Kang ,  Kook Yeon Kwak ,  Young Jin Hong ,  Sung Ryong Hong

发明人： In Hwan Choi ,  Kyung Won Kang ,  Kook Yeon Kwak ,  Young Jin Hong ,  Sung Ryong Hong

IPC分类号： H04L5/12 ,  H04L23/02

CPC分类号： H04B1/68 ,  H03M13/2732 ,  H03M13/2936 ,  H04L25/03273 ,  H04L2025/03382

摘要： A digital television (DTV) transmitter and a method of coding data in the DTV transmitter method are disclosed. A pre-processes enhanced data by coding the enhanced data for forward error correction (FEC) and expanding the FEC-coded enhanced data. A data formatter generates enhanced data packets including the pre-processed enhanced data and inserting known data to at least one of the enhanced data packets. A first multiplexer multiplexes main data packets with the enhanced data packets, and a data randomizer randomizes the multiplexed data packets. A Reed-Solomon (RS) encoder RS-codes the randomized data packets by adding first parity data, and a data interleaver interleaves the RS-coded data packets. A trellis encoder trellis-encodes the interleaved data packets, wherein the trellis encoder may be initialized when a known data sequence is inputted thereto.

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。 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。 数据格式化器生成增强的数据分组，包括预处理的增强数据，并将已知数据插入到增强数据分组中的至少一个。 第一复用器将主数据分组与增强数据分组复用，并且数据随机化器将复用的数据分组随机化。 里德 - 所罗门（RS）编码器通过添加第一奇偶校验数据RS编码随机数据分组，并且数据交织器交织RS编码的数据分组。 网格编码器对交织的数据分组进行网格编码，其中当已知的数据序列被输入时，网格编码器可被初始化。