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公开(公告)号：US11165892B2
公开(公告)日：2021-11-02
申请号：US16410962
申请日：2019-05-13
Applicant: Marvell World Trade Ltd.
Inventor： Hongyuan Zhang , Mingguang Xu , Yakun Sun
Abstract: A first communication device generates a physical layer (PHY) preamble for a PHY data unit to be transmitted via a communication channel, the PHY data unit conforming to a first communication protocol. Generating the PHY preamble includes generating a legacy portion of the PHY preamble to include a legacy signal field, which is decodable by one or more second communication devices that conform to a second communication protocol to determine a duration of the PHY data unit. The PHY preamble is generated to also include a duplicate of the legacy signal field in the PHY preamble, wherein presence of the duplicate of the legacy signal field indicates to one or more third communication devices that conform to the first communication protocol that the PHY data unit conforms to the first communication protocol. The first communication device generates the PHY data unit to include the PHY preamble and a PHY payload.
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公开(公告)号：US10257006B2
公开(公告)日：2019-04-09
申请号：US15793664
申请日：2017-10-25
Applicant: Marvell World Trade Ltd.
Inventor： Hongyuan Zhang , Yakun Sun , Mingguang Xu , Rui Cao , Hui-Ling Lou
Abstract: A communication device determines that an extension field should be included in physical layer (PHY) data unit to provide a receiver with more processing time to process data included in the PHY data unit, wherein the extension field is not required to be processed by the receiver. The communication device generates i) a PHY preamble of the PHY data unit, and ii) a PHY data portion of the PHY data unit, the PHY data unit conforming to a first communication protocol. Each orthogonal frequency division multiplexing (OFDM) symbol in the PHY data portion is generated with a first tone spacing, which is a fraction 1/N of a second tone spacing defined by a second communication protocol, wherein N is a positive integer greater than one. The communication device also generates the extension field of the PHY data unit, which is appended to an end of the PHY data portion.
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公开(公告)号：US10218822B2
公开(公告)日：2019-02-26
申请号：US15017385
申请日：2016-02-05
Applicant: Marvell World Trade Ltd.
Inventor： Hongyuan Zhang , Yakun Sun , Mingguang Xu
Abstract: A first communication device generates a physical layer (PHY) preamble for a PHY data unit that conforms to a first communication protocol. A first portion of the PHY preamble is generated to include a first signal field having a length subfield that indicates a length of the PHY data unit, A second signal field is generated, and the second signal field and a duplicate of the second signal field are included in the PHY preamble. The PHY preamble is formatted such that the first portion of the PHY preamble is decodable by any second communication device that conforms to a second communication protocol, but does not conform to the first communication protocol, to determine a duration of the PHY data unit based on the length subfield in the first portion of the PHY preamble. The first communication device generates the PHY data unit to include the PHY preamble.
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公开(公告)号：US09432100B2
公开(公告)日：2016-08-30
申请号：US14018807
申请日：2013-09-05
Applicant: Marvell World Trade Ltd.
Inventor： Yakun Sun , Mingguang Xu
CPC classification number: H04B7/0456 , H04B7/0478
Abstract: A method includes calculating a set of first metrics using channel information and one or more precoders, where each of the first metrics corresponds to a respective set of a plurality of sets of codebook precoders, and selecting, based on the set of first metrics and a first selection criteria, a set of codebook precoders from the plurality of sets of codebook precoders. The method also includes, in response to selecting the set of codebook precoders, calculating a set of second metrics and selecting, based on (i) the set of second metrics and (ii) a second selection criteria, a codebook precoder from the selected set of codebook precoders. Each of the second metrics is calculated using a respective codebook precoder in the selected set of codebook precoders. The method also includes causing the selected codebook precoder to be applied to a signal to be transmitted to a communication device.
Abstract translation: 一种方法包括使用信道信息和一个或多个预编码器来计算一组第一度量，其中第一度量中的每一个对应于多组码本预编码器的相应集合，并且基于该组第一度量和 第一选择标准，来自多组码本预编码器的一组码本预编码器。 该方法还包括响应于选择码本预编码器集合，计算一组第二度量并且基于（i）第二度量集合和（ii）第二选择标准来选择来自所选集合的码本预编码器 的码本预编码器。 使用选定的码本编码器集合中的相应码本预编码器来计算每个第二度量。 该方法还包括使所选择的码本预编码器应用于要发送到通信设备的信号。
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公开(公告)号：US10469297B2
公开(公告)日：2019-11-05
申请号：US16170919
申请日：2018-10-25
Applicant: MARVELL WORLD TRADE LTD.
Inventor： Hongyuan Zhang , Xiayu Zheng , Rui Cao , Mingguang Xu , Sudhir Srinivasa , Jie Huang
Abstract: A boundary within a last orthogonal frequency division multiplexing (OFDM) symbol of a PHY data unit is determined. Pre-encoder padding bits are added to a set of information bits to generate a set of padded information bits such that the set of padded information bits, after being encoded, fill one or more OFDM symbols up to the boundary within the last OFDM symbol. The set of padded information bits are encoded to generate a set of coded bits. A PHY preamble is generated to include a subfield that indicates the boundary. The one or more OFDM symbols are generated to include (i) the set of coded information bits in the one or more OFDM symbols up to the boundary to allow a receiving device to stop decoding the one or more OFDM symbols at the boundary, and (ii) post-encoder padding bits in the last OFDM symbol following the boundary.
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Patent Agency Ranking
公开(公告)号：US10411937B2
公开(公告)日：2019-09-10
申请号：US16370588
申请日：2019-03-29
Applicant: Marvell World Trade Ltd.
Inventor： Hongyuan Zhang , Yakun Sun , Mingguang Xu , Rui Cao , Hui-Ling Lou
Abstract: A communication device generates a first portion of a physical layer (PHY) preamble of a PHY data unit to include a first plurality of orthogonal frequency division multiplexing (OFDM) symbols. Each OFDM symbol of the first plurality of OFDM symbols is generated with a first OFDM tone spacing. The communication device generate a second portion of the PHY preamble to include a second plurality of OFDM symbols. Each OFDM symbol of the second plurality of OFDM symbols is generated with a second OFDM tone spacing that is a fraction 1/N of the first OFDM tone spacing, where N is a positive integer greater than one. The communication device generates a PHY data portion of the PHY data unit to include one or more third OFDM symbols. Each third OFDM symbol is generated with the second OFDM tone spacing.
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公开(公告)号：US10027449B2
公开(公告)日：2018-07-17
申请号：US14956947
申请日：2015-12-02
Applicant: MARVELL WORLD TRADE LTD.
Inventor： Yakun Sun , Hongyuan Zhang , Liwen Chu , Lei Wang , Jinjing Jiang , Mingguang Xu
Abstract: A first signal field to be included in a preamble of a physical layer (PHY) data unit is generated. The first signal field includes formatting information for a second signal field to be included in the PHY data unit. The formatting information includes an indication of a number of orthogonal frequency division multiplexing (OFDM) symbols in the second signal field. The second signal field is generated according to the formatting information in the first signal field. The second signal field includes formatting information for a data portion of the PHY data unit. The data portion is generated according to the formatting information in the second signal field. The preamble is generated to include at least the first signal field and the second signal field, The PHY data unit is generated to include the preamble and the data portion.
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公开(公告)号：US09832059B2
公开(公告)日：2017-11-28
申请号：US14728802
申请日：2015-06-02
Applicant: Marvell World Trade Ltd.
Inventor： Hongyuan Zhang , Yakun Sun , Mingguang Xu , Rui Cao , Hui-Ling Lou
CPC classification number: H04L27/2627 , H04L5/0048 , H04L27/2602 , H04L27/2613 , H04L27/2675 , H04W84/12
Abstract: In a method for generating a data unit for transmission via a communication channel, the data unit conforming to a first communication protocol, one or more orthogonal frequency division multiplexing (OFDM) symbols of the data unit are generated. Each OFDM symbol of the one or more OFDM symbols (i) occupies a first bandwidth, (ii) is generated with a first tone spacing, and (iii) includes a set of pilot tones. The first tone spacing is a fraction 1/N of a second tone spacing, the second tone spacing defined for the first bandwidth by a second communication protocol. The set of pilot tones includes a same number of pilot tones as defined for the first bandwidth by the second communication protocol. The data unit is generated to include the one or more OFDM symbols in a data portion of the data unit.
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公开(公告)号：US09768996B2
公开(公告)日：2017-09-19
申请号：US15212927
申请日：2016-07-18
Applicant: Marvell World Trade Ltd.
Inventor： Hongyuan Zhang , Xiayu Zheng , Rui Cao , Mingguang Xu , Sudhir Srinivasa , Jie Huang
CPC classification number: H04L27/2602 , H04B7/066 , H04L1/0009 , H04L1/0057 , H04L5/0007 , H04L5/0046 , H04L27/2605 , H04L27/2627 , H04L27/2628 , H04L27/2634
Abstract: One or more first padding bits are added to information bits to be included in a data portion of a data unit such that the information bits, after being encoded, fill one or more OFDM symbols up to a boundary within a last OFDM symbol. The information bits and the first padding bits are encoded to generate coded bits. After encoding, coded bits corresponding to the last OFDM symbol are padded, or constellation points generated based on the coded bits corresponding to the last OFDM symbol are padded, such that the padded coded bits or the padded constellation points occupy a remaining portion of the last OFDM symbol after the boundary. The last OFDM symbol of the data portion is generated to include the coded information bits corresponding to the last OFDM symbol, the first padding bits and second padding bits or padding constellation points added after encoding.
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10.发明授权Methods and systems for determining indicators used in channel state information (CSI) feedback in wireless systems 有权用于确定无线系统中信道状态信息（CSI）反馈中使用的指示符的方法和系统公开(公告)号：US09130630B2
公开(公告)日：2015-09-08
申请号：US14310281
申请日：2014-06-20
Applicant: Marvell World Trade Ltd.
Inventor： Mingguang Xu , Yakun Sun , Hui-Ling Lou
CPC classification number: H04B7/0626 , H04B7/0413 , H04B7/0456 , H04B7/0478 , H04B7/0617 , H04B7/063 , H04B7/0632 , H04B7/0639 , H04B7/065 , H04L25/03343 , H04L25/03898 , H04L25/03955
Abstract: Systems and methods are provided for determining channel state information (CSI) at a receiver for feedback to a transmitter to indicate properties of the communication channel. A signal is received at a receiver over a communication channel. An optimization value is determined based on the received signal and a plurality of matrix indicators. An amount of change in wideband properties of the communication channel is determined from the optimization value. Based on the determined amount of change, a CSI including a selected type indicator and a selected subset of the plurality of the matrix indicators is selected.
Abstract translation: 提供系统和方法用于在接收机处确定信道状态信息（CSI）以反馈给发射机以指示通信信道的属性。 通过通信信道在接收机处接收信号。 基于接收信号和多个矩阵指示符来确定优化值。 从优化值确定通信信道的宽带属性的变化量。 基于所确定的改变量，选择包括所选择的类型指示符和所述多个矩阵指示符的选定子集的CSI。
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