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1.发明申请INITIALIZATION OF TIMING RECOVERY AND DECISION-FEEDBACK EQUALIZATION IN A RECEIVER 审中-公开定时恢复的初始化和接收方的决策反馈均衡公开(公告)号：US20150326382A1
公开(公告)日：2015-11-12
申请号：US14763798
申请日：2013-01-28
申请人： Jian LI , Yisheng XUE , Michael M. FAN , Jilei HOU , Yin Huang , Fuyun Ling , QUALCOMM INCORPORATED
发明人： Jian Li , Yin Huang , Yisheng Xue , Michael M. Fan , Fuyun Ling , Jilei Hou
CPC分类号： H04L7/0004 , H04L25/03 , H04L25/0305 , H04L25/0307 , H04L2025/03656
摘要： A method of initializing a receiver is performed during an initialization mode. Timing offset values for a timing recovery circuit are repeatedly selected. For each selected timing offset value, timing recovery is performed using the timing offset value and groups of weights for a decision feedback equalizer are repeatedly selected. Each selected group of weights is used to perform blind decision feedback equalization. For each selected group of weights, a metric indicating data reception quality is computed. A timing offset value and a group of weights are chosen based on the computed metrics.
摘要翻译： 在初始化模式期间执行初始化接收机的方法。 定时恢复电路的定时偏移值被重复选择。 对于每个选择的定时偏移值，使用定时偏移值执行定时恢复，并且重复地选择用于判决反馈均衡器的权重组。 每个选择的权重组用于执行盲判决反馈均衡。 对于每个选择的权重组，计算指示数据接收质量的度量。 基于所计算的度量来选择定时偏移值和权重组。
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公开(公告)号：US20150372695A1
公开(公告)日：2015-12-24
申请号：US14766740
申请日：2013-03-14
申请人： Jian LI , Changlong XU , Yisheng XUE , Jilei HOU , Yin HUANG , QUALCOMM INCORPORATED
发明人： Jian Li , Changlong Xu , Yisheng Xue , Jilei Hou , Yin Huang
CPC分类号： H03M13/1131 , H04L1/0045 , H04L1/005 , H04L1/0057
摘要： A method of error correction using low density parity check (LDPC) codes is disclosed. A communications device receives a codeword and detects one or more bit errors in the received codeword using an LDPC code. The device then generates a corrected codeword based, at least in part, on a set of unsatisfied check nodes of the LDPC code. The device may determine that the one or more bit errors are associated with an absorption set of the LDPC code. The device may also determine a plurality of candidate codewords based on the set of unsatisfied check node and select the corrected codeword from the plurality of candidate codewords. Each of the plurality of candidate codewords may represent a valid codeword associated with the LDPC code.
摘要翻译： 公开了一种使用低密度奇偶校验（LDPC）码的纠错方法。 通信设备接收码字，并使用LDPC码检测接收到的码字中的一个或多个比特错误。 然后，该设备至少部分地基于LDPC码的一组不满足的校验节点来生成校正码字。 设备可以确定一个或多个比特错误与LDPC码的吸收集相关联。 该设备还可以基于该不满足的校验节点集合来确定多个候选码字，并从多个候选码字中选择校正后的码字。 多个候选码字中的每一个可以表示与LDPC码相关联的有效码字。
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公开(公告)号：US20200099393A1
公开(公告)日：2020-03-26
申请号：US16494621
申请日：2018-01-11
申请人： Changlong XU , Jian LI , Liangming WU , Joseph Binamira SORIAGA , Jilei HOU , Qualcomm Incorporated
发明人： Changlong Xu , Jian Li , Liangming Wu , Joseph Binamira Soriaga , Jilei Hou
摘要： Methods, systems, and devices for wireless communication are described. A transmitter may generate a first segmentation based on a first subset of control information and a second segmentation based on jointly encoding the first subset and a second subset of the control information. The transmitter may polar encode the first segmentation to generate a first codeword and the second segmentation to generate a second codeword, and transmit the first and second codewords. A receiver may determine a first bit sequence corresponding to the first subset based on decoding a first codeword and determine an error detection code (EDC) and a second bit sequence corresponding to the second subset based on decoding a second codeword. The receiver may perform error detection on the first and second bit sequences based on the determined EDC, and output the first bit sequence and the second bit sequence or a decoding error.
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公开(公告)号：US20200036477A1
公开(公告)日：2020-01-30
申请号：US16493364
申请日：2018-04-18
申请人： Changlong XU , Jian LI , Chao WEI , Jing JIANG , Jilei HOU , Qualcomm Incorporated
发明人： Changlong Xu , Jian Li , Chao Wei , Jing Jiang , Jilei Hou
摘要： Methods, systems, and devices for wireless communication are described for dynamic frozen bits of polar codes for early termination and performance improvement. A wireless device may receive a signal comprising a codeword encoded using a polar code. The wireless device may perform decoding of the codeword including at least: parity check of a first subset of decoding paths for making a decision on early termination of decoding of the codeword based on dynamic frozen bits, and generating path metrics for a second subset of the decoding paths that each pass the parity check based on the dynamic frozen bits, and performing error detection on a bit sequence corresponding to one of the second subset of the decoding paths based at part on error detection bits and the generated path metrics. The wireless device may process the information bits based on a result of the decoding.
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公开(公告)号：US11171672B2
公开(公告)日：2021-11-09
申请号：US16471388
申请日：2018-01-16
申请人： Jian Li , Changlong Xu , Chao Wei , Jilei Hou , Jing Jiang , QUALCOMM Incorporated
发明人： Jian Li , Changlong Xu , Chao Wei , Jilei Hou , Jing Jiang
摘要： Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to methods and apparatus for dynamic frozen polar codes, for example, for control channels. An exemplary method may be performed at the encoder. The method generally includes encoding a stream of bits using a polar code. The encoding includes selecting a first set of channel indices for encoding information bits. The encoding includes selecting a second set of the channel indices smaller than a channel index for a first information bit for encoding fixed frozen bits. The encoding includes selecting remaining channel indices for dynamic frozen (PCF) bits having values based on one or more of the information bits. The method includes transmitting the encoded stream of bits.
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公开(公告)号：US10944517B2
公开(公告)日：2021-03-09
申请号：US16078480
申请日：2016-11-04
申请人： Jian Li , Changlong Xu , Jilei Hou , Neng Wang , Chao Wei , QUALCOMM Incorporated
发明人： Jian Li , Changlong Xu , Jilei Hou , Neng Wang , Chao Wei
摘要： For communication utilizing polar codes, a hybrid automatic repeat request algorithm utilizing incremental redundancy (HARQ-IR) may provide increased throughput by including new data, not based on an original transmission, in a HARQ retransmission. The number of retransmitted bits and new information bits in each HARQ retransmission may be controlled in order to manage a tradeoff between increased throughput and a decreased block error rate (BLER).
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公开(公告)号：US20200100214A1
公开(公告)日：2020-03-26
申请号：US16467454
申请日：2018-01-24
申请人： Chao WEI , Jilei HOU , Changlong XU , Jian LI , Qualcomm Incorporated
发明人： Chao Wei , Changlong Xu , Jilei Hou , Jian Li
摘要： Methods, systems, and devices for wireless communication are described. In order to exchange data over a given wireless communication network, a wireless device may first perform a cell acquisition procedure (e.g., to determine cell-specific information such as timing and frequency offsets, bandwidth, control channel formatting, etc.). In some systems, aspects of the timing information may be conveyed with scrambling codes applied to a master information block (MIB). Physical broadcast channel (PBCH) payloads, including MIB transmissions, may be jointly encoded with synchronization signal indices. Bursts of MIB transmissions may thus be decoded without blind decoding while maintaining error protection and low latency that may be necessary to obtain critical system information within the MIB.
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8.发明申请公开(公告)号：US20160056907A1
公开(公告)日：2016-02-25
申请号：US14781157
申请日：2014-05-08
申请人： Chao WEI , Minghai FENG , Neng WANG , Jilei HOU , QUALCOMM INCORPORATED
发明人： Chao Wei , Minghai Feng , Neng Wang , Jilei Hou
CPC分类号： H04J11/005 , H04J3/1694 , H04L5/14 , H04W16/10 , H04W72/1226
摘要： Methods, systems, and devices are described for interference mitigation between neighboring cells through the use of cell clusters and virtual logical cell clusters. Cells may be added to a cell cluster with a first cell when a level of interference coupling between the first cell and one or more neighboring cells exceeds a first threshold. One or more other cells may be added to a virtual logical cell cluster with the first cell when the level of interference coupling is between a second threshold and the first threshold, the second threshold being less than the first threshold. Interference mitigation between cells of cell clusters and/or virtual logical cell clusters may be performed. Interference mitigation may be accomplished through, for example, coordination of TDD uplink-downlink (UL-DL) configurations for cell clusters and scheduling-dependent interference management (SDIM) for virtual logical cell clusters.
摘要翻译： 描述了通过使用小区集群和虚拟逻辑小区集群来在相邻小区之间进行干扰减轻的方法，系统和装置。 当第一小区和一个或多个相邻小区之间的干扰耦合水平超过第一阈值时，小区可以被添加到具有第一小区的小区簇。 当干扰耦合的水平处于第二阈值和第一阈值之间时，一个或多个其它小区可被添加到具有第一小区的虚拟逻辑小区簇，第二阈值小于第一阈值。 可以执行小区簇和/或虚拟逻辑小区群的小区之间的干扰减轻。 干扰减轻可以通过例如协调用于小区集群的TDD上行链路 - 下行链路（UL-DL）配置和用于虚拟逻辑小区集群的调度相关干扰管理（SDIM）来实现。
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公开(公告)号：US20160029358A1
公开(公告)日：2016-01-28
申请号：US14773869
申请日：2013-03-15
申请人： Jilei HOU , Neng WANG , Chao WEI , QUALCOMM INCORPORATED
CPC分类号： H04W72/046 , H04B7/0695 , H04W74/0833
摘要： A method for improved random access procedures by a UE is provided. The method comprises: measuring a common CSI-RS; selecting a best horizontal/vertical beam from a set of fixed beams; determining a preamble mapped to the selected horizontal/vertical beam; transmitting the preamble; and receiving a random access response.
摘要翻译： 提供了一种用于UE改进随机接入过程的方法。 该方法包括：测量公共CSI-RS; 从一组固定光束中选择最佳水平/垂直光束; 确定映射到所选择的水平/垂直波束的前导码; 传送序言; 并接收随机接入响应。
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公开(公告)号：US20150327324A1
公开(公告)日：2015-11-12
申请号：US14654660
申请日：2014-01-27
申请人： Chao WEI , Xipeng ZHU , Jilei HOU , Neng WANG , QUALCOMM INCORPORATED
发明人： Chao Wei , Xipeng Zhu , Jilei Hou , Neng Wang
CPC分类号： H04W74/002 , H04W52/02 , H04W52/0216 , H04W52/0235 , H04W76/28 , Y02D70/1224 , Y02D70/1242 , Y02D70/1262 , Y02D70/1264 , Y02D70/142 , Y02D70/146 , Y02D70/22 , Y02D70/24 , Y02D70/25
摘要： Methods, systems, and devices are described for discontinuous transmission and/or discontinuous reception in time division duplex (TDD) systems that may have data transmission formats dynamically reconfigured. An initial uplink-downlink (UL-DL) configuration for TDD communication between an eNB and user equipment (UE) may be established. This initial UL-DL configuration may be reconfigured to a different UL-DL configuration for one or more UEs in communication with the eNB. When a UE switches to discontinuous reception (DRX) mode, it may monitor control information from the eNB during DRX on periods, a frequency of the DRX on periods based on a reference UL-DL configuration irrespective of any reconfiguration of UL-DL configuration for a particular UE. In some aspects, a UE that is operating in a UL-DL reconfiguration mode may, upon entering DRX mode, autonomously discontinue operating in the UL-DL re-configuration mode.
摘要翻译： 描述了可能具有动态重新配置的数据传输格式的时分双工（TDD）系统中的不连续传输和/或不连续接收的方法，系统和设备。 可以建立用于eNB和用户设备（UE）之间的TDD通信的初始上行链路 - 下行链路（UL-DL）配置。 对于与eNB通信的一个或多个UE，可将该初始UL-DL配置重新配置为不同的UL-DL配置。 当UE切换到不连续接收（DRX）模式时，它可以在DRX开启周期期间监视来自eNB的控制信息，该DRX周期是基于参考UL-DL配置的DRX开启周期的频率，而不管UL-DL配置的任何重新配置如何， 一个特定的UE。 在一些方面中，在进入DRX模式时，以UL-DL重新配置模式工作的UE可以在UL-DL重新配置模式下自主地停止工作。
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