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公开(公告)号：US10277325B1
公开(公告)日：2019-04-30
申请号：US15614145
申请日：2017-06-05
Applicant: Marvell International Ltd.
Inventor： Jin Zhang , Kok-Wui Cheong
Abstract: According to various embodiments, a method for demarcating data bursts includes receiving, via a coax network, a first data burst and a second data burst at a network interface device, wherein the first data burst and the second data burst at least partially overlap in the time domain. In various embodiments, the first data burst includes a start marker, first data elements following the start marker, and an end marker following the first data elements. In various embodiments, the start marker is orthogonal to the end marker. The method further includes distinguishing, at the network interface device, the first data burst from the second data burst based on the start marker and the end marker; and transmitting the first data burst and the second data burst via an optical network such that the first data burst and the second data burst do not overlap in time.
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公开(公告)号：US10044406B1
公开(公告)日：2018-08-07
申请号：US15825937
申请日：2017-11-29
Applicant: Marvell International LTD.
Inventor： Shaoan Dai , Kok-Wui Cheong , Zhenzhong Gu , Junqing Sun , Meng Zeng , Xing Wu
IPC: H04B3/04 , H04B3/23 , H04B17/336 , H04L25/03 , H04L25/08
Abstract: A transceiver to communicate in a vehicle via a single twisted-pair Ethernet cable includes a transmitter and a receiver, an analog front end, an equalizer, and a controller. The transmitter transmits signals via the single twisted-pair Ethernet cable. The receiver receives signals via the single twisted-pair Ethernet cable. The analog front end receives a first signal received by the transceiver via the single twisted-pair Ethernet cable and outputs a second signal. The equalizer includes a notch filter to cancel electromagnetic interference from the second signal. The controller makes a frequency response of the equalizer independent of the electromagnetic interference by controlling tap values of the notch filter. The controller controls gain of one or more of the analog front end and the equalizer based on the frequency response of the equalizer.
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13.发明授权公开(公告)号：US09935664B1
公开(公告)日：2018-04-03
申请号：US15297028
申请日：2016-10-18
Applicant: Marvell International Ltd.
Inventor： Shaoan Dai , Kok-Wui Cheong , Zhenzhong Gu , Junqing Sun
CPC classification number: H04B1/1036 , H04B1/082 , H04B1/1027 , H04B3/238 , H04B17/327 , H04L5/0048
Abstract: Various aspects of this disclosure describe detecting a signal and measuring power with a multi-band filter. Examples include a signal detection and power measurement module in a receiver capable of detecting a training signal and calculating a reliable power measurement in the presence of narrowband interference. A received signal is filtered by a multi-band filter comprising a plurality of sub-band filters. For instance, sub-band filters may be bandpass filters with non-overlapping pass-bands. A training signal is detected by comparing powers of each of the outputs of the sub-band filters to a plurality of thresholds. For example, each sub-band may be assigned a different threshold value. Responsive to detecting a training signal, a power measurement is determined from at least one sub-band filter output. A gain is set based on the determined power measurement, and applied in the receiver.
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公开(公告)号：US09608905B1
公开(公告)日：2017-03-28
申请号：US14333444
申请日：2014-07-16
Applicant: MARVELL INTERNATIONAL LTD.
Inventor： Jin Zhang , Xiaolin Che , Yuji Meng , Yicheng Chen , Gang Wang , Kok-Wui Cheong
CPC classification number: H04L27/265 , H04L1/0001 , H04L27/2627 , H04L27/2662 , H04L47/2483 , H04L2012/2843 , H04W56/0005 , H04W74/0808
Abstract: A packet is detected in an input data stream. A stream of fast Fourier transform (FFT) blocks are scanned for a plurality of candidate symbols for a preamble of the packet. The stream of FFT blocks correspond to the input data stream. A symbol boundary is detected between adjacent candidate symbols of the plurality of candidate symbols. The FFT blocks are aligned with the symbol boundary. A transition boundary is detected between different adjacent candidate symbols of the preamble based on the detected symbol boundary. A packet detection indication is provided based on the detected transition boundary.
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公开(公告)号：US09521025B1
公开(公告)日：2016-12-13
申请号：US14730479
申请日：2015-06-04
Applicant: Marvell International Ltd.
Inventor： Jin Zhang , Kok-Wui Cheong
IPC: H04B10/00 , H04L27/26 , H04B10/27 , H04B10/2575
CPC classification number: H04L27/2647 , H04B10/60 , H04L5/003 , H04L25/4923 , H04L27/2613 , H04L27/2663 , H04L27/2671 , H04L27/2675 , H04L27/2697
Abstract: Systems and methods for detection of a ternary sequence are provided. An example apparatus includes a receiver configured to receive an OFDM signal comprising a plurality of OFDM Resource Elements (REs). A processor is coupled to the receiver and is configured to detect a presence of a known ternary sequence in the received OFDM signal. The processor is configured to detect the ternary sequence by determining a correlation between a first set of the OFDM REs and a first set of symbols of the ternary sequence. A power of each RE of a second set of the OFDM REs is determined. A sum of the powers is determined. A detection value is based on the correlation and the sum. The ternary sequence is determined to be present in the signal based on a comparison of the detection value to a threshold.
Abstract translation: 提供了用于检测三元序列的系统和方法。 一种示例性装置包括：接收器，被配置为接收包括多个OFDM资源元素（RE）的OFDM信号。 处理器耦合到接收器，并且被配置为检测接收的OFDM信号中已知三元序列的存在。 处理器被配置为通过确定第一组OFDM RE和第三组序列的第一组符号之间的相关性来检测三进制序列。 确定第二组OFDM RE的每个RE的功率。 权力的总和是确定的。 检测值基于相关性和总和。 基于检测值与阈值的比较，确定三态序列存在于信号中。
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Patent Agency Ranking
公开(公告)号：US09515634B1
公开(公告)日：2016-12-06
申请号：US15044690
申请日：2016-02-16
Applicant: Marvell International Ltd.
Inventor： Kok-Wui Cheong
CPC classification number: H04B1/10 , H03H21/0001
Abstract: Embodiments provide a receiver comprising an input coupled to a communication channel for receiving an input signal from the communication channel, a first processing filter coupled to the input, and a first level estimation module coupled to the first processing filter to estimate a first level of the input signal based upon the first processing filter. The receiver further comprises a second processing filter coupled to the input, a second level estimation module coupled to the second processing filter to estimate a second level of the input signal based upon the second processing filter, and a control module coupled to (i) the first level estimation module and (ii) the second level estimation module, wherein the control module includes logic configured to select an analog pre-filter for the input signal based upon (i) the first level of the input signal and (ii) the second level of the input sign.
Abstract translation: 实施例提供了一种接收机，其包括耦合到通信信道的输入，用于从通信信道接收输入信号，耦合到输入的第一处理滤波器和耦合到第一处理滤波器的第一级估计模块，以估计第一级 基于第一处理过滤器的输入信号。 所述接收机还包括耦合到所述输入端的第二处理滤波器，耦合到所述第二处理滤波器的第二级估计模块，以基于所述第二处理滤波器估计所述输入信号的第二电平;以及控制模块，其耦合到（i） 第一级估计模块和（ii）第二级估计模块，其中控制模块包括被配置为基于（i）输入信号的第一级选择输入信号的模拟预滤波器的逻辑，以及（ii）第二级估计模块 级别的输入符号。
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17.发明授权System and method for performing maximum ratio combining on a plurality of received symbols 有权用于在多个接收到的符号上执行最大比率组合的系统和方法公开(公告)号：US09036743B1
公开(公告)日：2015-05-19
申请号：US14215636
申请日：2014-03-17
Applicant: Marvell International Ltd.
Inventor： Hui-Ling Lou , Kok-Wui Cheong
CPC classification number: H04L1/0052 , H03M13/4107 , H03M13/6331 , H04L1/0054
Abstract: A system for performing maximum ratio combining on a plurality of symbols corresponding to a transmitted symbol. A plurality of antennas is configured to receive, via respective communication channels, respective ones of the plurality of symbols. An automatic gain control is configured to modify each of the plurality of symbols using a respective gain. The respective gains are different for each of the plurality of symbols. A channel estimator is configured to generate, for each of the respective communication channels, a channel estimate in accordance with a respective one of the plurality of symbols as modified using the respective gain. A demodulator is configured to generate, in accordance with the channel estimates and the plurality of symbols as modified using the respective gains, a maximum ratio combining output and demodulate the maximum ratio combining output to generate a demodulated plurality of symbols.
Abstract translation: 一种用于在对应于所发送的符号的多个符号上执行最大比率组合的系统。 多个天线被配置为经由相应的通信信道接收多个符号中的相应的一个。 自动增益控制被配置为使用相应的增益来修改多个符号中的每一个。 对于多个符号中的每一个，相应的增益是不同的。 信道估计器被配置为针对每个相应的通信信道，根据使用相应增益修改的多个符号中的相应一个符号来生成信道估计。 解调器被配置为根据信道估计和使用相应增益修改的多个符号，生成最大比合并输出并解调最大比合并输出以产生经解调的多个符号。
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18.发明授权公开(公告)号：US08938035B1
公开(公告)日：2015-01-20
申请号：US13773907
申请日：2013-02-22
Applicant: Marvell International Ltd.
Inventor： Shaoan Dai , Kok-Wui Cheong
CPC classification number: H04L1/0054 , H03M13/27 , H03M13/395 , H03M13/3961 , H03M13/41 , H03M13/6325 , H04L1/0071
Abstract: Systems and methods for transferring data over a 2-pair communication system. Two input data streams are received at a Viterbi detector. The two input data streams are converted into an output signal at the Viterbi detector. Each of the input data streams includes a first data symbol interleaved with a second data symbol. A first set of branch metric values is computed for the first data symbols of the two input data streams. A second set of branch metric values is computed for the second data symbols of the two input data streams, where the computing of the second set is based on the first set. Each of the two input data streams is de-interleaved and downsampled to generate the output signal, where the output signal includes four channels of data generated based on the first and second sets of branch metric values. Each of the four channels is of a lower data rate than each of the two input data streams.
Abstract translation: 通过2对通信系统传输数据的系统和方法。 在维特比检测器处接收两个输入数据流。 两个输入数据流在维特比检测器处被转换成输出信号。 每个输入数据流包括与第二数据符号交错的第一数据符号。 针对两个输入数据流的第一数据符号计算第一组分支量度值。 针对两个输入数据流的第二数据符号计算第二组分支量度值，其中第二组的计算基于第一组。 两个输入数据流中的每一个被解交织和下采样以产生输出信号，其中输出信号包括基于第一和第二组分支量度值生成的四个数据通道。 四个通道中的每一个具有比两个输入数据流中的每一个低的数据速率。
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公开(公告)号：US09253122B1
公开(公告)日：2016-02-02
申请号：US13686039
申请日：2012-11-27
Applicant: MARVELL INTERNATIONAL LTD.
Inventor： Jin Zhang , Kok-Wui Cheong
IPC: H04L12/931
CPC classification number: H04L49/405 , H04B3/54 , H04B3/544
Abstract: Systems, methods, and other embodiments associated with using a preamble with at least two polarity transitions to communicate over a power line channel are described. According to one embodiment, an apparatus includes a transmitter configured to transmit a communication signal on a communication channel for communicating with a remote device. The communication channel is a power line channel that carries electric power transmissions. The apparatus also includes a transmission logic configured to control the transmitter to generate at least two polarity transitions in a preamble of the communication signal.
Abstract translation: 描述了与使用具有至少两个极性转换的前导码相关联的系统，方法和其它实施例以通过电力线信道进行通信。 根据一个实施例，一种装置包括：发射机，被配置为在通信信道上发送通信信号，用于与远程设备进行通信。 通信信道是承载电力传输的电力线路。 该装置还包括被配置为控制发射机在通信信号的前导码中产生至少两个极性转换的传输逻辑。
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20.发明授权Methods, algorithms, software, circuits, receivers and systems for decoding convolutional code 有权用于解码卷积码的方法，算法，软件，电路，接收器和系统公开(公告)号：US09209837B1
公开(公告)日：2015-12-08
申请号：US13871520
申请日：2013-04-26
Applicant: Marvell International Ltd.
Inventor： Kok-Wui Cheong , Dimitrios-Alexandros Toumpakaris , Hui-Ling Lou
CPC classification number: H03M13/3972 , H03M13/3961 , H03M13/3994 , H03M13/413
Abstract: Methods, software, circuits and systems involving a low complexity, tailbiting decoder. In various embodiments, the method relates to concatenating an initial and/or terminal subblock of the serial data block and outputting decoded data from an internal block of the modified data block. The circuitry generally includes a buffer, logic configured to concatenate an initial and/or terminal subblock to the serial data block, and a decoder configured to decode the data block, estimate starting and ending states for the data block, and output an internal portion of the serial data block and the one or more sequences as decoded data. The invention advantageously reduces the complexity of a suboptimal convolutional decoder, ensures smooth transitions at the beginning and end of the serial data block during decoding, and increases the reliability of the starting and ending states, without adding overhead to the transmitted data block.
Abstract translation: 方法，软件，电路和系统涉及低复杂度的尾随解码器。 在各种实施例中，该方法涉及连接串行数据块的初始和/或末端子块并从修改的数据块的内部块输出解码数据。 电路通常包括缓冲器，被配置为将初始和/或末端子块连接到串行数据块的逻辑，以及被配置为对数据块进行解码的解码器，估计数据块的开始和结束状态，以及输出数据块的内部部分 串行数据块和一个或多个序列作为解码数据。 本发明有利地降低了次优卷积解码器的复杂度，确保了解码过程中串行数据块开始和结束时的平滑过渡，并增加了起始和结束状态的可靠性，而不会增加传输数据块的开销。
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