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1.发明授权公开(公告)号：US10090870B1
公开(公告)日：2018-10-02
申请号：US15943275
申请日：2018-04-02
Applicant: Marvell International Ltd.
Inventor： Shaoan Dai , Kok-Wui Cheong , Zhenzhong Gu , Junqing Sun
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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2.发明授权Method and apparatus for detecting narrow-band interference in a communication system 有权用于检测通信系统中的窄带干扰的方法和装置公开(公告)号：US09106300B1
公开(公告)日：2015-08-11
申请号：US14516848
申请日：2014-10-17
Applicant: Marvell International Ltd.
Inventor： Yuji Meng , Yicheng Chen , Jin Zhang , Kok-Wui Cheong
CPC classification number: H04B1/1036 , H04B17/345 , H04B2001/1072
Abstract: Aspects of the disclosure provide a method for detecting interference. The method includes receiving a plurality of frequency components of a signal received at a first device, identifying, among the plurality of frequency components, first frequency components that are not corrupted by interference, determining a noise power threshold based on the first frequency components, and comparing powers of the plurality of frequency components with the noise power threshold to determine second frequency components to be suppressed during decoding of the signal.
Abstract translation: 本公开的方面提供了一种用于检测干扰的方法。 该方法包括接收在第一设备处接收的信号的多个频率分量，在多个频率分量中识别未被干扰破坏的第一频率分量，基于第一频率分量确定噪声功率阈值，以及 将多个频率分量的功率与噪声功率阈值进行比较，以确定在信号解码期间要抑制的第二频率分量。
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3.发明授权Method and apparatus for equalization and decoding in a wireless communications system including plural receiver antennae 有权在包括多个接收机天线的无线通信系统中进行均衡和解码的方法和装置公开(公告)号：US08731085B1
公开(公告)日：2014-05-20
申请号：US13947562
申请日：2013-07-22
Applicant: Marvell International Ltd.
Inventor： Hui-Ling Lou , Kok-Wui Cheong
CPC classification number: H04L27/2649 , H03M13/4107 , H04B7/0857 , H04L1/0047 , H04L1/0054 , H04L25/0202 , H04L25/03159 , H04L25/03286
Abstract: A transceiver including a receiver and a receive baseband processor. The receiver is configured to receive an analog radio frequency signal including a time domain analog Orthogonal Frequency Division Multiplexing (OFDM) symbol and generate a baseband signal. The baseband signal includes a frequency domain digital OFDM symbol. The receive baseband processor is configured to generate an estimate of the channel for each sub-carrier of the frequency domain digital OFDM symbol, generate channel state information corresponding to each sub-carrier of the frequency domain digital OFDM symbol, generate a plurality of demodulated symbols based on the estimate of the channel for each sub-carrier of the frequency domain digital OFDM symbol, wherein each demodulated symbol corresponds to a given sub-carrier of the frequency domain digital OFDM symbol, perform decoding on each demodulated symbol, and generate a corresponding decoded symbol, wherein the decoding of each demodulated symbol is based on the channel state information.
Abstract translation: 收发器，包括接收机和接收基带处理器。 接收机被配置为接收包括时域模拟正交频分复用（OFDM）符号的模拟射频信号并产生基带信号。 基带信号包括频域数字OFDM符号。 接收基带处理器被配置为产生频域数字OFDM符号的每个子载波的信道的估计，生成与频域数字OFDM符号的每个子载波相对应的信道状态信息，生成多个解调符号 基于频域数字OFDM符号的每个子载波的信道的估计，其中每个解调符号对应于频域数字OFDM符号的给定子载波，对每个解调的符号执行解码，并产生相应的 解码符号，其中每个解调符号的解码基于信道状态信息。
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4.发明授权Method and apparatus for decoding a symbol incorporating channel state information 有权用于对包含信道状态信息的符号进行解码的方法和装置公开(公告)号：US09166854B1
公开(公告)日：2015-10-20
申请号：US14633659
申请日：2015-02-27
Applicant: Marvell International Ltd.
Inventor： Hui-Ling Lou , Kok-Wui Cheong
CPC classification number: H04L27/2649 , H03M13/4107 , H04B7/0857 , H04L1/0047 , H04L1/0054 , H04L25/0202 , H04L25/03159 , H04L25/03286
Abstract: A baseband processor for a receiver. The baseband processor includes a channel estimator configured to generate an estimate of a communication channel based on a baseband signal. The baseband signal corresponds to a radio frequency signal received by the receiver. A demodulator is configured to generate, based on the baseband signal and the estimate of the communication channel, channel state information corresponding to the communication channel, and generate, based on the estimate of the communication channel, a demodulated symbol, wherein the demodulated symbol incorporates the channel state information. A decoder is configured to generate branch metrics for the demodulated symbol using the estimate of the communication channel as received from the channel estimator and the demodulated symbol as received from the demodulator, and perform decoding on the demodulated symbol, using the branch metrics for the demodulated symbol, in order to generate a decoded symbol.
Abstract translation: 用于接收器的基带处理器。 基带处理器包括被配置为基于基带信号生成通信信道的估计的信道估计器。 基带信号对应于由接收机接收的射频信号。 解调器被配置为基于通信信道的基带信号和估计来生成对应于通信信道的信道状态信息，并且基于通信信道的估计生成解调符号，其中解调符号包含 通道状态信息。 解码器被配置为使用从信道估计器接收的通信信道的估计和从解调器接收的解调符号来生成解调符号的分支度量，并且使用解调的分支度量对解调的符号执行解码 符号，以便生成解码符号。
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5.发明授权公开(公告)号：US09042466B1
公开(公告)日：2015-05-26
申请号：US14159541
申请日：2014-01-21
Applicant: Marvell International LTD.
Inventor： Hui-Ling Lou , Kok-Wui Cheong , Randy Tsang
CPC classification number: H04B1/38 , H04B7/0413 , H04B7/0891 , H04L1/0002 , H04L1/0625 , H04L5/0003 , H04L5/003 , H04L25/03343 , H04L2025/03426
Abstract: A wireless communication device including a transceiver, a medium access control device, a first module and a second module. The transceiver is configured to receive a signal on a channel. The medium access control device is configured to determine a parameter, wherein the parameter is a rank of a matrix of the channel, an angle of array of the signal, a packet error rate of the signal, a frame error rate of the signal, or a signal-to-noise ratio of the signal. The first module is configured to, based on the parameter, determine whether an operating environment of the wireless communication device is a rich-scattering environment or a line of sight environment. The second module is configured to adjust a bandwidth of the wireless communication device based on the operating environment as determined by the first module.
Abstract translation: 一种无线通信设备，包括收发器，介质访问控制设备，第一模块和第二模块。 收发器被配置为在信道上接收信号。 介质访问控制设备被配置为确定参数，其中参数是信道的矩阵的秩，信号的阵列角度，信号的分组错误率，信号的帧错误率，或者 信号的信噪比。 第一模块被配置为基于该参数来确定无线通信设备的操作环境是富散射环境还是视线环境。 第二模块被配置为基于由第一模块确定的操作环境来调整无线通信设备的带宽。
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Patent Agency Ranking
6.发明授权Receiver and method for incorporating channel state information into maximum ratio combining of a plurality of received signals 有权用于将信道状态信息合并到多个接收信号的最大比组合中的接收机和方法公开(公告)号：US08971459B1
公开(公告)日：2015-03-03
申请号：US14278514
申请日：2014-05-15
Applicant: Marvell International Ltd.
Inventor： Hui-Ling Lou , Kok-Wui Cheong
CPC classification number: H04L27/2649 , H03M13/4107 , H04B7/0857 , H04L1/0047 , H04L1/0054 , H04L25/0202 , H04L25/03159 , H04L25/03286
Abstract: A receiver including a plurality of receiver pathways. The plurality of receiver pathways are configured to receive, via respective receive antennas, a radio frequency signal transmitted over a communication channel and generate a plurality of respective baseband signals corresponding to the radio frequency signal. A channel estimator is configured to generate an estimate of the channel based on the plurality of respective baseband signals. A demodulator is configured to generate, based on the plurality of respective baseband signals and the estimate of the channel, channel state information corresponding to the communication channel, perform maximum ratio combining on the plurality of respective baseband signals using the channel state information, and generate, based on the estimate of the channel, a plurality of demodulated symbols that incorporate the channel state information. A decoder is configured to perform decoding on the plurality of demodulated symbols to generate respective decoded symbols.
Abstract translation: 一种接收机，包括多个接收机路径。 多个接收机路径被配置为经由相应的接收天线接收通过通信信道发送的射频信号，并且生成对应于该射频信号的多个相应的基带信号。 信道估计器被配置为基于多个相应的基带信号来生成信道的估计。 解调器被配置为基于多个相应的基带信号和与通信信道相对应的信道状态信息来生成信道状态信息，使用信道状态信息对多个相应的基带信号执行最大比率合并，并且生成 基于信道的估计，包含信道状态信息的多个解调符号。 解码器被配置为对多个解调符号执行解码以产生相应的解码符号。
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7.发明授权Method and apparatus for performing baseband equalization in symbol modulated communications 有权用于在符号调制通信中执行基带均衡的方法和装置公开(公告)号：US08675786B1
公开(公告)日：2014-03-18
申请号：US13888473
申请日：2013-05-07
Applicant: Marvell International Ltd.
Inventor： Hui-Ling Lou , Kok-Wui Cheong
IPC: H04L27/06
CPC classification number: H04L1/0052 , H03M13/4107 , H03M13/6331 , H04L1/0054
Abstract: A system includes a channel estimator configured to receive a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols via a plurality of respective antennas, and generate estimates of a channel based on the plurality of OFDM symbols. A demodulator is configured to generate a plurality of demodulated symbols based on the plurality of OFDM symbols and the estimates of the channel. A decoder is configured to receive the estimates of the channel from the channel estimator, receive the plurality of demodulated symbols from the demodulator, and calculate decision metrics for the plurality of OFDM symbols using both the estimates of the channel and the plurality of demodulated symbols.
Abstract translation: 一种系统包括：信道估计器，被配置为经由多个相应天线接收多个正交频分复用（OFDM）符号，并且基于所述多个OFDM符号来生成信道的估计。 解调器被配置为基于多个OFDM符号和信道的估计来生成多个解调符号。 解码器被配置为从信道估计器接收信道的估计，从解调器接收多个解调符号，并且使用信道估计和多个解调符号来计算多个OFDM符号的判定度量。
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公开(公告)号：US09838072B1
公开(公告)日：2017-12-05
申请号：US15164364
申请日：2016-05-25
Applicant: Marvell International LTD.
Inventor： Shaoan Dai , Kok-Wui Cheong , Zhenzhong Gu , Junqing Sun , Meng Zeng , Xing Wu
IPC: H04B3/04 , H04B3/23 , H04L25/03 , H04L25/08 , H04B17/336
CPC classification number: H04B3/04 , H04B3/23 , H04B17/336 , H04L25/03885 , H04L25/085
Abstract: A transceiver to communicate in a vehicle via a single twisted-pair Ethernet cable includes a transmitter to transmit signals via the single twisted-pair Ethernet cable and a receiver to receive signals via the single twisted-pair Ethernet cable. The transceiver includes an equalizer, a signal-to-noise ratio estimator, and a controller. The equalizer includes a notch filter and a slicer. The equalizer receives an input signal received by the transceiver via the single twisted-pair Ethernet cable. The notch filter cancels electromagnetic interference from the input signal and to output a filtered signal. The slicer slices the filtered signal. The signal-to-noise ratio estimator estimates a signal-to-noise ratio based on an output of the slicer. The controller controls a rate of adapting the equalizer by controlling a rate of change of tap values of the notch filter based on the signal-to-noise ratio.
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公开(公告)号：US09716529B1
公开(公告)日：2017-07-25
申请号：US15164391
申请日：2016-05-25
Applicant: Marvell International Ltd.
Inventor： Shaoan Dai , Kok-Wui Cheong , Zhenzhong Gu , Junqing Sun , Xing Wu
CPC classification number: H04B3/04 , H04B3/23 , H04B17/336 , H04L25/03885 , H04L25/085
Abstract: A transceiver includes an equalizer, an adaptation module, an error detector, and a controller. The equalizer receives an input signal via the single twisted-pair Ethernet cable, including outputs of an analog front end of the receiver and an echo canceller, to cancel electromagnetic interference from the input signal. The adaptation module adapts parameters of one or more of i) the equalizer, ii) the analog front end, and iii) the echo canceller based on an error in an output of the equalizer due to the electromagnetic interference. The error detector detects when the error is greater than or equal to a predetermined threshold and in response sets an error indicator to indicate no error for a predetermined period of time. The controller controls adaptation of the parameters of the one or more of i) the equalizer, ii) the analog front end, and iii) the echo canceller based on the error indicator.
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公开(公告)号：US09673905B1
公开(公告)日：2017-06-06
申请号：US14661948
申请日：2015-03-18
Applicant: Marvell International Ltd.
Inventor： Jin Zhang , Kok-Wui Cheong
CPC classification number: H04B10/27 , H04L25/02 , H04L27/26 , H04L27/2656 , H04L27/2671 , H04L27/2675
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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