公开(公告)号：US08781042B1

公开(公告)日：2014-07-15

申请号：US14050893

申请日：2013-10-10

Applicant: Marvell International Ltd.

Inventor： Qing Zhao ,  Souvik Dihidar ,  Leilei Song ,  Jungwon Lee

IPC: H03D1/04

CPC classification number: H04L27/2647 ,  H04L25/06

Abstract: In accordance with the teachings described herein, systems and methods are provided for calibrating DC offset in a receiver. A DC calibration circuit may be used that is configured to receive a digital multi-carrier modulated (MCM) signal that includes a sequence of MCM symbols. The DC calibration circuit may include an accumulator and a compensator. The accumulator may be used to determine an estimated DC offset of a current MCM symbol in the sequence of MCM symbols. The compensator may be used to remove the estimated DC offset from a next MCM symbol in the sequence of MCM symbols. The accumulator may also be used to receive a plurality of digital samples that comprise the current MCM symbol and to determine the estimated DC offset by calculating an average of the plurality of digital samples.

Abstract translation: 根据本文所述的教导，提供了用于校准接收机中的DC偏移的系统和方法。 可以使用DC校准电路，其被配置为接收包括MCM符号序列的数字多载波调制（MCM）信号。 DC校准电路可以包括蓄电池和补偿器。 可以使用累加器来确定MCM符号序列中的当前MCM符号的估计DC偏移。 补偿器可以用于从MCM符号序列中的下一个MCM符号中去除估计的DC偏移。 累加器还可以用于接收包括当前MCM符号的多个数字样本，并且通过计算多个数字样本的平均值来确定估计的DC偏移。

公开(公告)号：US08718204B1

公开(公告)日：2014-05-06

申请号：US13888214

申请日：2013-05-06

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Jiwoong P. Choi ,  Hui-Ling Lou

IPC: H03D1/00 ,  H04L27/06

CPC classification number: H04L25/03203 ,  H04L25/03331

Abstract: One of a plurality of candidate data symbols is selected. All possible values of the selected one candidate data symbol are grouped into two or more bit groups. A bit group is selected from the two or more bit groups. A local optimum candidate value from values in the selected bit group is determined for the selected one candidate data symbol for a given set of values corresponding to all of the plurality of candidate data symbols but the selected one candidate data symbol, the local optimum candidate value minimizing a distance value corresponding to a distance between the received data symbol vector and a channel matrix multiplied with the candidate vector, without calculating the distance value. A likelihood value is calculated for a bit in the selected one candidate data symbol based at least in part on the determined local optimum candidate value.

Abstract translation: 选择多个候选数据符号中的一个。 所选择的一个候选数据符号的所有可能值被分组为两个或更多位组。 从两个或多个位组中选择一个位组。 对于对应于所有多个候选数据符号但所选择的一个候选数据符号的给定值的集合，为所选择的一个候选数据符号确定所选位组中的值的局部最佳候选值， 最小化与所接收的数据符号向量和与候选向量相乘的信道矩阵之间的距离相对应的距离值，而不计算距离值。 至少部分地基于所确定的局部最佳候选值来计算所选择的一个候选数据符号中的比特的似然值。

公开(公告)号：US08711990B1

公开(公告)日：2014-04-29

申请号：US13872740

申请日：2013-04-29

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Qing Zhao

IPC: H04L27/06

CPC classification number: H04L27/2647 ,  H04L5/0007 ,  H04L25/0224 ,  H04L27/2613 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2662

Abstract: A system including a demodulation module, a metric generation module, and a preamble detection module. The demodulation module is configured to generate demodulated signals based on demodulating, in accordance with a differential demodulation scheme, signals received from a base station. The signals received from the base station include a plurality of symbols. The demodulated signals comprise a plurality of real parts each having a corresponding magnitude. The metric generation module is configured to generate a plurality of metrics for the plurality of symbols based on the corresponding magnitudes of the plurality of real parts of the demodulated signals. The preamble detection module is configured to detect, based on the plurality of metrics, whether the plurality of symbols in the signals received from the base station includes a preamble symbol.

Abstract translation: 一种包括解调模块，度量生成模块和前导码检测模块的系统。 解调模块被配置为基于根据差分解调方案解调从基站接收的信号来产生解调信号。 从基站接收的信号包括多个符号。 解调信号包括多个具有相应幅度的实数部分。 度量生成模块被配置为基于解调信号的多个实部的相应大小来生成多个符号的多个度量。 前导码检测模块被配置为基于多个度量来检测从基站接收的信号中的多个符号是否包括前导码符号。

公开(公告)号：US08619841B1

公开(公告)日：2013-12-31

申请号：US13675516

申请日：2012-11-13

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Hui-Ling Lou ,  Dimitrios-Alexandros Toumpakaris

IPC: H04B1/38 ,  H04L25/02 ,  H04L27/00 ,  H04L7/00 ,  H04L23/00

CPC classification number: H04L27/2657 ,  H04B7/01

Abstract: A transceiver configured to be implemented in a first device includes transmitter and receiver modules and first and second estimator modules. The receiver module receives a first signal transmitted on a channel from a second device to the first device. The first estimator module estimates a first parameter associated with the first signal or the channel. The second estimator module estimates a carrier frequency offset based on the first parameter. The carrier frequency offset is a difference between a first carrier frequency of the first device, and a second carrier frequency of the second device. The transmitter module adjusts a second parameter based on the carrier frequency offset, and based on the second parameter, transmits a second signal to the second device or the receiver module adjusts a third parameter based on the carrier frequency offset, and based on the third parameter, receives a third signal from the second device.

Abstract translation: 被配置为在第一设备中实现的收发器包括发射器和接收器模块以及第一和第二估计器模块。 接收器模块接收在从第二设备到第一设备的信道上发送的第一信号。 第一估计器模块估计与第一信号或通道相关联的第一参数。 第二估计器模块基于第一参数估计载波频率偏移。 载波频率偏移是第一装置的第一载波频率和第二装置的第二载波频率之间的差。 发射机模块基于载波频率偏移来调整第二参数，并且基于第二参数，将第二信号发送到第二设备，或者接收机模块基于载波频率偏移来调整第三参数，并且基于第三参数 从第二设备接收第三信号。

公开(公告)号：US09225477B1

公开(公告)日：2015-12-29

申请号：US14072613

申请日：2013-11-05

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Jiwoong Choi

IPC: H04L1/18 ,  G06F11/10

CPC classification number: H04L1/1845 ,  G06F11/1004 ,  H04L1/1816 ,  H04L1/1819

Abstract: Systems and techniques relating to wireless communications are described. A described technique includes receiving, at a wireless communication device, signals representing wireless data transmissions that are based on a message, the received signals including one or more previous signals and a current signal, wherein the current signal was transmitted in response to the one or more previous signals failing to successfully resolve the message; combining the received signals based on unequal weights to produce a combined signal, the weights include a first weight value assigned to the one or more previous signals and a second, greater weight value assigned to the current signal, the second weight value being based on a noise variance, the first weight value being based on a modified version of the noise variance, the modified version reflecting one or more decoding failures; and decoding the combined signal to resolve the message.

Abstract translation: 描述与无线通信相关的系统和技术。 所描述的技术包括在无线通信设备处接收表示基于消息的无线数据传输的信号，所接收的信号包括一个或多个先前信号和当前信号，其中当前信号响应于一个或多个 更多以前的信号未能成功解决消息; 基于不等权重组合所接收的信号以产生组合信号，所述权重包括分配给所述一个或多个先前信号的第一加权值和分配给所述当前信号的第二较大加权值，所述第二权重值基于 噪声方差，所述第一权重值基于所述噪声方差的修改版本，所述修改版本反映一个或多个解码失败; 并解码组合信号以解决消息。

公开(公告)号：US09215121B1

公开(公告)日：2015-12-15

申请号：US14309657

申请日：2014-06-19

Applicant: MARVELL INTERNATIONAL LTD.

Inventor： Jungwon Lee ,  Jihwan P. Choi ,  Hui-Ling Lou ,  Rohit U. Nabar ,  Yakun Sun

IPC: H04L27/00 ,  H04L27/26

CPC classification number: H04L27/2627 ,  H04B7/0413 ,  H04B7/0669 ,  H04B7/0671 ,  H04L1/0625 ,  H04L5/0023 ,  H04L5/0087 ,  H04L25/0204 ,  H04L25/03159 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: A plurality of diagonal matrices Ci is determined, where the plurality of diagonal matrices Ci is for modifying a plurality of transmit signals to be transmitted via a plurality of transmit antennas, each diagonal matrix Ci for modifying an i-th block of sub-carriers, adjacent in frequency, in the plurality of transmit signals. The plurality of diagonal matrices Ci is used to modify the plurality of transmit signals to implement transmit diversity.

Abstract translation: 确定多个对角矩阵Ci，其中多个对角矩阵Ci用于修改要经由多个发射天线发射的多个发射信号，用于修改第i个子载波块的每个对角矩阵Ci， 频率相邻的多个发送信号。 多个对角矩阵Ci用于修改多个发射信号以实现发射分集。

公开(公告)号：US09191044B1

公开(公告)日：2015-11-17

申请号：US14142291

申请日：2013-12-27

Applicant: Marvell International Ltd.

Inventor： Yakun Sun ,  Jungwon Lee

IPC: H04B1/10 ,  H04B7/04

CPC classification number: H04B7/0456 ,  H04B1/10 ,  H04B7/0413 ,  H04J11/004 ,  H04L1/0048 ,  H04L25/03305

Abstract: Systems and methods are provided for determining a successive interference cancellation (SIC) decoding ordering in a multiple input multiple output transmission (MIMO) system. Multiple decoding orderings for received codewords are identified. A performance objective, such as total throughput or total probability of decoding, is computed for each one of the orderings based on the position of the codewords in the ordering. A globally optimal ordering is found that maximizes the performance objective over the multiple decoding orderings.

Abstract translation: 提供了用于确定多输入多输出传输（MIMO）系统中的连续干扰消除（SIC）解码排序的系统和方法。 识别接收码字的多个解码顺序。 基于排序中的码字的位置，针对每个排序计算性能目标，例如总吞吐量或总解码概率。 发现全局最优排序，使多个解码顺序的性能目标最大化。

公开(公告)号：US09007950B1

公开(公告)日：2015-04-14

申请号：US13951003

申请日：2013-07-25

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee

IPC: G06F15/16 ,  H04W24/10

CPC classification number: H04J11/005 ,  H04B7/024 ,  H04B7/0404 ,  H04B7/0854 ,  H04L5/0032 ,  H04L5/0048 ,  H04W24/08 ,  H04W24/10

Abstract: A mobile station including an input configured to receive input signals via a channel, a noise measuring module, and a control module. The noise measuring module is configured to measure noise based on the input signals, and generate information in response to measuring the noise based on the input signals. The control module is configured to determine, depending on whether the noise measuring module is able to (i) measure the noise based on the input signals and (ii) generate the information in response to measuring the noise based on the input signals, whether to use a first procedure to estimate a gain of the channel or a second procedure to estimate the gain of the channel, where the first procedure to estimate the gain of the channel is different than the second procedure to estimate the gain of the channel.

Abstract translation: 一种移动站，包括被配置为经由信道接收输入信号的输入，噪声测量模块和控制模块。 噪声测量模块被配置为基于输入信号测量噪声，并且响应于基于输入信号测量噪声而生成信息。 控制模块被配置为根据噪声测量模块能够（i）基于输入信号测量噪声和（ii）响应于基于输入信号测量噪声生成信息，来确定是否 使用第一过程来估计信道的增益或估计信道增益的第二过程，其中估计信道增益的第一过程不同于估计信道增益的第二过程。

公开(公告)号：US08989314B1

公开(公告)日：2015-03-24

申请号：US14215160

申请日：2014-03-17

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Jihwan P. Choi

IPC: H03D1/24

CPC classification number: H04L1/0048 ,  H04L1/0041 ,  H04L25/03248 ,  H04L27/3488 ,  H04L2001/0093

Abstract: A computer-readable medium stores instructions causing one or more processors to demodulate a received signal including a plurality of user signals. Respective user data in each of at least some of the plurality of user signals is encoded with a respective finite state machine encoder having a respective number of states Si, wherein i=1, 2, . . . , N, N being the number of users, and wherein at least a first user signal and a second user signal are encoded independently of each other. The instructions cause the processor(s) to calculate distances between transmit symbols in the received signal and an expected joint symbol value, and jointly decode, with a finite state machine decoder, user data in the demodulated received signal, including at least first user data corresponding to the first user signal, based on the calculated distances. The finite state machine decoder has S1*S2* . . . *SN states.

Abstract translation: 计算机可读介质存储使一个或多个处理器解调包括多个用户信号的接收信号的指令。 多个用户信号中的至少一些用户信号中的每一个中的相应用户数据用具有相应数量的状态Si的相应的有限状态机编码器进行编码，其中i = 1,2。 。 。 ，N，N是用户的数量，并且其中至少第一用户信号和第二用户信号被彼此独立地编码。 指令使处理器计算接收信号中的发送符号与期望的联合符号值之间的距离，并且与有限状态机解码器共同解码解调的接收信号中的用户数据，包括至少第一用户数据 对应于第一用户信号，基于所计算的距离。 有限状态机解码器具有S1 * S2 *。 。 。 * SN状态。

公开(公告)号：US08958287B1

公开(公告)日：2015-02-17

申请号：US13942156

申请日：2013-07-15

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Jihwan P. Choi

IPC: G01R31/08 ,  H04B7/04

CPC classification number: H04B7/0456 ,  H04B7/0617

Abstract: Methods and apparatus are provided for directing a beam towards a receiving device in the presence of interference. A beam transmitted by a transmission source is received at a receiving device. The received beam is affected by an interference signal from an interfering source. The receiving device computes a covariance matrix that represents a channel estimate associated with the interfering source. The receiving device modifies a predetermined sounding signal based on the covariance matrix for transmission to the transmission source. The receiving device causes the transmission source to estimate an equivalent channel matrix based on the predetermined sounding signal and the modified predetermined sounding signal. The equivalent channel matrix represents the channel estimate associated with the interfering source and a channel estimate associated with the transmission source.

Abstract translation: 提供了用于在存在干扰的情况下将光束引向接收装置的方法和装置。 在接收装置处接收由发送源发送的波束。 接收的波束受来自干扰源的干扰信号的影响。 接收设备计算表示与干扰源相关联的信道估计的协方差矩阵。 接收装置根据用于发送到发送源的协方差矩阵修改预定的发声信号。 接收装置使得发送源基于预定的探测信号和修改的预定探测信号来估计等效信道矩阵。 等效信道矩阵表示与干扰源相关联的信道估计和与传输源相关联的信道估计。