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1. 发明授权

US09136890B1 Signal detection with adjustable number of interferring signals 有权
标题翻译：信号检测可调干扰信号数量
公开(公告)号：US09136890B1
公开(公告)日：2015-09-15
申请号：US14221828
申请日：2014-03-21
申请人： MARVELL INTERNATIONAL LTD.
发明人： Jungwon Lee , Jiwoong Choi , Yakun Sun
IPC分类号： H03D1/04 , H04B1/10
CPC分类号： H04B1/10 , H04L25/03891 , H04L2025/03426
摘要： Systems, methods, and other embodiments associated with signal detection with an adjustable number of interfering signals. According to one embodiment an apparatus includes an interferer counter, a detection method selector, and a signal detector. The interferer counter is configured to identify a number of active interfering signals in a received signal. The detection method selector is configured to select a signal detection method based, at least in part, on the number of active interfering signals identified by the interferer counter. In this manner, when one interfering signal is identified, a detection method having a first order is selected; and when two interfering signals are identified, the detection method having a second order is selected. The signal detector is configured to process the received signal according to the signal detection method selected by the detection method selector to detect an intended signal in the received signal.
摘要翻译：与可调节数量的干扰信号的信号检测相关的系统，方法和其它实施例。根据一个实施例，一种装置包括干扰计数器，检测方法选择器和信号检测器。干扰计数器被配置为识别接收信号中的多个有源干扰信号。检测方法选择器被配置为至少部分地基于由干扰计数器识别的有源干扰信号的数量来选择信号检测方法。以这种方式，当识别出一个干扰信号时，选择具有第一级的检测方法; 并且当识别出两个干扰信号时，选择具有二阶的检测方法。信号检测器被配置为根据由检测方法选择器选择的信号检测方法处理接收信号，以检测接收信号中的预期信号。

2. 发明授权

US09106456B1 Adaptive low-complexity channel estimation 有权
标题翻译：自适应低复杂度信道估计
公开(公告)号：US09106456B1
公开(公告)日：2015-08-11
申请号：US14243247
申请日：2014-04-02
申请人： MARVELL INTERNATIONAL LTD.
发明人： Yakun Sun , Jiwoong Choi , Hui-Ling Lou , Raphael Cendrillon
IPC分类号： H04L27/38 , H04L25/02 , H04L27/26 , H04L25/03
CPC分类号： H04L25/0206 , H04L25/0204 , H04L25/0212 , H04L25/022 , H04L25/0228 , H04L27/2647 , H04L27/2649 , H04L27/38 , H04L2025/03535
摘要： Systems, methods, and other embodiments associated with adaptive low-complexity channel estimation are illustrated. In one embodiment an integrated circuit includes a controller configured to control a switch to select between a plurality of processing paths that each perform channel estimation using a different order of operations to process an orthogonal frequency-division multiplexed (OFDM) signal.
摘要翻译：示出了与自适应低复杂度信道估计相关联的系统，方法和其他实施例。在一个实施例中，集成电路包括控制器，其被配置为控制交换机在多个处理路径之间进行选择，每个处理路径使用不同的操作顺序执行信道估计以处理正交频分复用（OFDM）信号。

3. 发明授权

US08891590B1 Method and apparatus for processing wireless signals 有权
标题翻译：用于处理无线信号的方法和装置
公开(公告)号：US08891590B1
公开(公告)日：2014-11-18
申请号：US13627223
申请日：2012-09-26
申请人： Marvell International Ltd.
发明人： Raphael Cendrillon , Yakun Sun , Jiwoong Choi , Hui-Ling Lou
IPC分类号： H04B1/00
CPC分类号： H04L1/009 , H04L25/022 , H04L25/0232
摘要： Systems, methods, and other embodiments associated with processing wireless signals. According to one embodiment, a wireless receiver includes at least one antenna configured to receive a wireless signal. The wireless signal comprises pilot symbols dispersed irregularly throughout a two-dimensional grid. The pilot symbols of the wireless signal are usable by the wireless receiver to estimate the wireless channel at each point in the two-dimensional grid. The wireless receiver includes a pattern logic including hardware configured to generate additional pilot symbols in the two-dimensional grid. The additional pilot symbols generated by the pattern logic along with the pilot symbols dispersed irregularly throughout the two-dimensional grid form a regular distribution of pilot symbols in the two-dimensional grid. The wireless receiver is configured to estimate the wireless channel at each point in the two-dimensional grid based on the regular distribution of pilot symbols in the two-dimensional grid.
摘要翻译：与处理无线信号相关联的系统，方法和其它实施例。根据一个实施例，无线接收器包括配置成接收无线信号的至少一个天线。无线信号包括不规则地分散在二维网格中的导频符号。无线信号的导频符号可由无线接收机使用以估计二维网格中每个点处的无线信道。无线接收器包括模式逻辑，其包括被配置为在二维网格中生成附加导频符号的硬件。由模式逻辑产生的附加导频符号以及不规则地分散在整个二维网格中的导频符号形成二维网格中导频符号的规则分布。无线接收器被配置为基于二维网格中的导频符号的规则分布来估计二维网格中的每个点处的无线信道。

4. 发明授权

US09143210B1 Soft sphere decoder for MIMO maximum likelihood demodulation 有权
标题翻译：用于MIMO最大似然解调的软球解码器
公开(公告)号：US09143210B1
公开(公告)日：2015-09-22
申请号：US14050115
申请日：2013-10-09
申请人： Marvell International Ltd.
发明人： Jungwon Lee , Jiwoong Choi
IPC分类号： H04L27/06 , H04B7/04
CPC分类号： H04B7/0413 , H04L25/03242
摘要： Methods and apparatus are provided for soft-decision maximum likelihood demodulation to decode a data vector transmitted in a multiple-input multiple-output (MIMO) communications channel. Soft-decision demodulators are disclosed that implement sphere decoding to reduce complexity of demodulation while preserving optimal performance. Candidate signal values associated with the transmitted data vector may be obtained and partitioned into signal bit groups. A sphere search may be performed over the candidate signal values within a search radius value to determine a smallest distance metric for each signal bit group. The search radius value may be updated based on a current smallest distance metric for each signal bit group. A log-likelihood ratio (LLR) may be computed from the determined smallest distance metrics for each signal bit group using a soft-decision demodulator.
摘要翻译：提供了用于软判决最大似然解调以解码在多输入多输出（MIMO）通信信道中发送的数据向量的方法和装置。公开了软判决解调器，其实施球解码以降低解调的复杂度，同时保持最佳性能。可以获得与发送的数据向量相关联的候选信号值并将其划分为信号位组。可以在搜索半径值内的候选信号值上执行球体搜索，以确定每个信号比特组的最小距离度量。可以基于每个信号位组的当前最小距离度量来更新搜索半径值。可以使用软判决解调器从每个信号位组的确定的最小距离度量计算对数似然比（LLR）。

5. 发明授权

US09001910B1 Systems and methods for estimating decoder noise power in OFDM systems 有权
标题翻译： OFDM系统中解码器噪声功率估计的系统和方法
公开(公告)号：US09001910B1
公开(公告)日：2015-04-07
申请号：US14250787
申请日：2014-04-11
申请人： Marvell International Ltd.
发明人： Jiwoong Choi , Yakun Sun , Jungwon Lee , Jianyi Huang
IPC分类号： H04K1/10 , H04B7/04 , H04L1/00 , H04L25/02
CPC分类号： H04B7/0413 , H04L1/0036 , H04L25/0202 , H04L25/0204 , H04L27/2647
摘要： Systems and methods for computing a decoder noise power estimate are provided. A pilot signal transmitted through a fading channel from a wireless transmission source is received. Signal power of the received pilot signal, channel noise power, and channel estimation error are computed. The decoder noise power estimate is determined based on the computed signal power, channel noise power, and channel estimation error.
摘要翻译：提供了用于计算解码器噪声功率估计的系统和方法。接收通过衰落信道从无线发送源发送的导频信号。计算接收到的导频信号的信号功率，信道噪声功率和信道估计误差。基于所计算的信号功率，信道噪声功率和信道估计误差来确定解码器噪声功率估计。

6. 发明授权

US08873686B1 Successive interference cancellation in multiple-input multiple-output receivers 有权
标题翻译：多输入多输出接收机中的连续干扰消除
公开(公告)号：US08873686B1
公开(公告)日：2014-10-28
申请号：US14226037
申请日：2014-03-26
申请人： Marvell International Ltd.
发明人： Jungwon Lee , Yakun Sun , Jiwoong Choi , Leilei Song , Adina Matache
IPC分类号： H04B7/10 , H04L1/00 , H04B7/04
CPC分类号： H04L1/0048 , H04B7/0413 , H04J11/004
摘要： A system including a first receiver that generates a first set of decoded codewords; and a first canceller that cancels, in response to any decoded codeword of the first set of decoded codewords failing CRC and a first decoded codeword from the first set of decoded codewords passing CRC, interference of a first codeword on a second set of codewords which includes the plurality of codewords and excludes the first codeword. The system further includes a second receiver that generates a third set of decoded codewords by decoding the second set of codewords; and a second canceller that cancels, in response to any decoded codeword of the third set of decoded codewords failing CRC and a second decoded codeword from the third set of decoded codewords passing CRC, interference of a second codeword on a fourth set of codewords.
摘要翻译：一种包括产生第一组解码码字的第一接收机的系统; 以及第一消除器，其响应于未通过CRC的第一组解码码字的任何解码码字和来自经过CRC的来自第一解码码字集合的第一解码码字，第一码字对第二组码字的干扰包括所述多个码字并且排除所述第一码字。该系统还包括第二接收机，其通过对第二组码字进行解码来产生第三组解码码字; 以及第二消除器，其响应于未通过CRC的第三组解码码字的解码码字和来自经过CRC的第三解码码字集合的第二解码码字，在第四组码字上产生第二码字的干扰。

7. 发明授权

US09225477B1 Significance of retransmission used in subsequent decoding 有权
标题翻译：在后续解码中使用重传的意义
公开(公告)号：US09225477B1
公开(公告)日：2015-12-29
申请号：US14072613
申请日：2013-11-05
申请人： Marvell International Ltd.
发明人： Jungwon Lee , Jiwoong Choi
IPC分类号： H04L1/18 , G06F11/10
CPC分类号： H04L1/1845 , G06F11/1004 , H04L1/1816 , H04L1/1819
摘要： 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.
摘要翻译：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。

8. 发明授权

US08917584B1 Systems and methods for computing a relative path delay between multiple transmission sources 有权
标题翻译：用于计算多个传输源之间的相对路径延迟的系统和方法
公开(公告)号：US08917584B1
公开(公告)日：2014-12-23
申请号：US13751707
申请日：2013-01-28
申请人： Marvell International Ltd.
发明人： Jungwon Lee , Jiwoong Choi , Jihwan P. Choi
IPC分类号： H04J11/00 , H04J3/06 , H04W40/38
CPC分类号： H04W40/38 , H04J11/0063 , H04L25/0202 , H04L27/2601
摘要： Systems and methods are provided for computing a relative path delay between multiple transmitting source to select a source that is closest to a receiving device. Preamble sequences unique to each source are received by a receiving device. The receiving devices determines based on a channel estimation or differential algorithm which transmitting source is closer to the receiving device. The channel estimation algorithm computes the path delay based on a channel estimation correlation at different preamble sequence indices. The differential algorithm computes the path delay based on a correlation between the received and transmitted preamble sequences at different preamble sequence indices. The receiving device selects the closer of the multiple sources to be the source from which to extract data.
摘要翻译：提供的系统和方法用于计算多个发送源之间的相对路径延迟，以选择最接近接收设备的源。每个源独有的前导序列由接收设备接收。接收装置基于信道估计或差分算法确定发射源更靠近接收装置。信道估计算法基于在不同前同步码序列索引处的信道估计相关性来计算路径延迟。差分算法基于在不同前同步码序列索引处的接收和发送前同步码序列之间的相关性来计算路径延迟。接收设备选择要从中提取数据的源的更多的源。

9. 发明授权

US08787483B1 Method and apparatus for detecting a desired signal in the presence of an interfering signal 有权
标题翻译：在存在干扰信号的情况下检测所需信号的方法和装置
公开(公告)号：US08787483B1
公开(公告)日：2014-07-22
申请号：US13659709
申请日：2012-10-24
申请人： Marvell International Ltd.
发明人： Yakun Sun , Krishna Srikanth Gomadam , Jiwoong Choi , Raphael Cendrillon , Hui-Ling Lou , Yan Zhang
IPC分类号： H04L1/02
CPC分类号： H04L1/0048 , H04B7/0413 , H04L1/06 , H04L25/03248 , H04L25/03891 , H04L27/0012
摘要： In accordance with an embodiment, there is provided a method comprising receiving, at a receiver, a desired signal and an interfering signal, wherein the interfering signal was transmitted with a modulation unknown to the receiver; identifying a likely modulation corresponding to the modulation with which the interfering signal was transmitted; and decoding the desired signal using a modulation dependent multiple-input multiple output (MIMO) detection, wherein the modulation dependent MIMO detection is based at least in part on the identified likely modulation corresponding to the modulation with which the interfering signal was transmitted, wherein the modulation dependent MIMO detection includes maximum likelihood (ML) detection.
摘要翻译：根据实施例，提供了一种方法，包括在接收机处接收期望信号和干扰信号，其中以接收机未知的调制方式发送干扰信号; 识别与所述干扰信号被发送的调制相对应的可能调制; 以及使用调制相关多输入多输出（MIMO）检测对所述期望信号进行解码，其中所述调制相关MIMO检测至少部分地基于与所述干扰信号被发送的调制相对应的所识别的可能调制，其中，调制相关MIMO检测包括最大似然（ML）检测。

10. 发明授权

US08644433B1 MIMO soft demodulation using hard-decision candidate selection 失效
标题翻译：使用硬判决候选选择的MIMO软解调
公开(公告)号：US08644433B1
公开(公告)日：2014-02-04
申请号：US13667455
申请日：2012-11-02
申请人： Marvell International Ltd.
发明人： Jungwon Lee , Jiwoong Choi , Hui-Ling Lou
IPC分类号： H03D1/00
CPC分类号： H04L25/03891 , H04B7/0413 , H04B7/0854 , H04L25/067
摘要： Systems and methods for reconstructing digital information in a multiple-input receiver from signals transmitted by a multiple-output transmitter, in a multiple-input multiple-output (MIMO) communications channel are provided. A plurality of signal streams are obtained from a plurality of transmitted signals and a first candidate signal value is selected for each of the plurality of signal streams. A plurality of additional candidate signal values are also selected for each of the plurality of signal streams in response to selecting the first candidate signal value. A log-likelihood ratio (LLR) is computed from the plurality of signal streams based on all of the selected candidate signal values. Digital information may then be estimated based on the computed LLR.
摘要翻译：提供了在多输入多输出（MIMO）通信信道中由多输出发射机发送的信号重建多输入接收机中的数字信息的系统和方法。从多个发送信号中获得多个信号流，并且为多个信号流中的每一个选择第一候选信号值。响应于选择第一候选信号值，还为多个信号流中的每一个选择多个附加候选信号值。基于所选择的所有候选信号值，从多个信号流计算对数似然比（LLR）。然后可以基于所计算的LLR来估计数字信息。

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