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1. 发明授权

US09838152B2 Modulation indication method for communication systems 有权
公开(公告)号：US09838152B2
公开(公告)日：2017-12-05
申请号：US12448187
申请日：2006-12-14
申请人： Joshua Lawrence Koslov , Wen Gao , Yik Chung Wu
发明人： Joshua Lawrence Koslov , Wen Gao , Yik Chung Wu
IPC分类号： H04L27/00 , H04L1/00 , H04L1/16
CPC分类号： H04L1/0025 , H04L1/0003 , H04L1/1607
摘要： A method and apparatus for improving performance in communication systems is provided. In one implementation, information is accessed indicating the quality of at least one communication channel. Based on the accessed information, a modulation scheme is indicated for sending data over the channel encoded with a rateless code. Various different information relating to the communication channel can be used to determine a quality metric for the channel.

2. 发明授权

US09793931B2 Method and apparatus for detecting transmitters for a white space device 有权
公开(公告)号：US09793931B2
公开(公告)日：2017-10-17
申请号：US13520382
申请日：2010-01-15
申请人： Paul Gothard Knutson , Wen Gao , Benyuan Zhang , Hou-Shin Chen
发明人： Paul Gothard Knutson , Wen Gao , Benyuan Zhang , Hou-Shin Chen
IPC分类号： H04W16/14 , H04B1/04 , H04L12/66 , H04N21/436 , H04N21/4363 , H04W28/04
CPC分类号： H04B1/0475 , H04L12/66 , H04N21/43615 , H04N21/43637 , H04W28/04
摘要： The invention relates to a wireless home gateway apparatus and methods of wirelessly delivering audio and/or video programs between a home gateway and a client and mitigating interference thereon. Specifically, the present invention relates to transmitting an audio/video program on two white space channels and alternately stopping transmission on one of said channels to search for external transmissions on the white space channel. The present invention permits the wireless home gateway to continuously transmit an audio/video program to a client while periodically searching for transmitters on each of the white space channels.

3. 发明授权

US09729280B2 ARQ with adaptive modulation for communication systems 有权
公开(公告)号：US09729280B2
公开(公告)日：2017-08-08
申请号：US12448118
申请日：2006-12-14
申请人： Joshua Lawrence Koslov , Wen Gao , Yik Chung Wu
发明人： Joshua Lawrence Koslov , Wen Gao , Yik Chung Wu
IPC分类号： H04L1/18 , H04L1/00 , H04L1/16
CPC分类号： H04L1/188 , H04L1/0003 , H04L1/0025 , H04L1/1671 , H04L1/1848 , H04L1/1877
摘要： A method and apparatus for improving performance in communication systems is provided. In order to maintain the real time constraints of the communication systems, time intervals and indication signals are used in various implementations to indicate and/or force subsequent transmissions of encoded data. An indication signal can include, for example, modulation modification information for subsequent transmissions. In various other implementations, a quality metric is computed for the communication channel and is used to provide modified modulation scheme information to be subsequently used on the communication channel.

4. 发明授权

US09729274B2 Rateless encoding in communication systems 有权
公开(公告)号：US09729274B2
公开(公告)日：2017-08-08
申请号：US12448234
申请日：2007-06-25
申请人： Joshua Lawrence Koslov , Wen Gao , Yik Chung Wu
发明人： Joshua Lawrence Koslov , Wen Gao , Yik Chung Wu
IPC分类号： H04L27/00 , H04L1/00 , H04L1/18
CPC分类号： H04L1/0041 , H04L1/0003 , H04L1/0057 , H04L1/0065 , H04L1/1819
摘要： A method and apparatus for improving performance in communication systems is provided. In one implementation received encoded data is decoded using an inner rateless decoder to produce a series of decoded rateless outputs. The series of decoded rateless outputs is combined to produce a block, and the block is decoded using an outer block decoder. In another implementation, encoded data for a data block encoded with a rateless code is received. It is determined that an initial amount of mutual information for the data block has been received, the initial amount being an amount expected to allow decoding of the received encoded data. Additional encoded data for the data block is received. It is determined that an extra amount of mutual information for the data block has been received beyond said initial amount of mutual information.

5. 发明授权

US09008179B2 Encoding of prediction residuals for lossless video coding 有权
标题翻译：无损视频编码的预测残差编码
公开(公告)号：US09008179B2
公开(公告)日：2015-04-14
申请号：US13539196
申请日：2012-06-29
申请人： Wen Gao , Gregory Cook , Mingyuan Yang , Jin Song , Haoping Yu
发明人： Wen Gao , Gregory Cook , Mingyuan Yang , Jin Song , Haoping Yu
IPC分类号： H04N19/50 , H04N19/13 , H04N19/176 , G06T9/00 , H04N19/146 , H04N19/46 , H04N19/129 , H04N19/61 , H04N19/593 , H04N19/132 , H04N19/136
CPC分类号： H04N19/146 , H04N19/129 , H04N19/132 , H04N19/136 , H04N19/176 , H04N19/46 , H04N19/50 , H04N19/593 , H04N19/61
摘要： An apparatus used in video encoding comprising a processor configured to generate a prediction block for a current block, compute a difference between the current block and the prediction block to generate a residual block, wherein the residual block comprises a plurality of residual values, and if the plurality of residual values include at least one non-zero residual value comprising at least one sign and at least one residual level, perform entropy encoding on the at least one sign; and perform entropy encoding on the at least one residual level, wherein one non-residual value comprises one sign and one residual level.
摘要翻译：一种用于视频编码的装置，包括：处理器，被配置为生成当前块的预测块，计算当前块与预测块之间的差以产生残差块，其中残余块包括多个残差值，如果所述多个残余值包括至少一个包含至少一个符号和至少一个剩余电平的非零残余值，对所述至少一个符号执行熵编码; 并且在所述至少一个残余级别上执行熵编码，其中一个非残差值包括一个符号和一个残余级别。

6. 发明授权

US08908659B2 Method and apparatus for coexistence of different bandwidth systems in TV white space 有权
标题翻译：电视空间中不同带宽系统共存的方法和装置
公开(公告)号：US08908659B2
公开(公告)日：2014-12-09
申请号：US13697016
申请日：2011-05-10
申请人： Hou-Shin Chen , Wen Gao
发明人： Hou-Shin Chen , Wen Gao
IPC分类号： H04J3/00 , H04W4/00 , H04B7/212 , H04J3/08 , H04L12/43
CPC分类号： H04W72/1215 , H04W16/14
摘要： Methods and apparatus of slot time synchronization for coexistence of 5 MHz, 10 MHz, and 20 MHz systems in TV white space are provided. The methods and apparatus extend concepts used in traditional 802.11 applications in the MAC layer so that networks that overlap in frequency and space can have access opportunities to TV white space channels. Several passive mechanisms are described which use bits of traditional 802.11 MAC Management Protocol Data Units to receive information related to the slot time of other overlapped networks. An active approach is described that uses measurements from a radio resource measurement service to adjust the slot time of stations in a network to that of the lowest bandwidth overlapped network in frequency and space.
摘要翻译：提供了在TV空白区域中共享5 MHz，10 MHz和20 MHz系统的时隙时间同步的方法和设备。这些方法和设备扩展了MAC层中传统802.11应用中使用的概念，使得在频率和空间上重叠的网络可以获得TV空白信道的访问机会。描述了几种被动机制，其使用传统的802.11MAC管理协议数据单元的位来接收与其他重叠网络的时隙时间有关的信息。描述了一种主动方法，其使用来自无线电资源测量服务的测量来将网络中的站的时隙时间调整为频率和空间中最低带宽重叠网络的时隙时间。

7. 发明授权

US08743997B2 Method and apparatus for improving throughput and error performance of rateless coding systems 有权
标题翻译：用于提高无编码编码系统的吞吐量和误差性能的方法和装置
公开(公告)号：US08743997B2
公开(公告)日：2014-06-03
申请号：US12451273
申请日：2007-05-03
申请人： Chia-Han Lee , Wen Gao
发明人： Chia-Han Lee , Wen Gao
IPC分类号： H04L27/00
CPC分类号： H03M13/00 , H03M13/3761
摘要： A method and system are described for adaptively adjusting data communication of a rateless coding system, including adaptively estimating a symbol coding length, determining a symbol threshold, determining if the adaptively estimated symbol coding length is less than the symbol threshold, adjusting a transmission power level based on the second determining act and adaptively adjusting a modulation scheme based on the second determining act. Also described are a method and system for decoding communication of a rateless coding system, including receiving encoded symbols, determining if a length of the received encoded symbols is greater than a threshold number of encoded symbols and decoding the received encoded symbols if the length of the received encoded symbols is greater than the threshold number of encoded symbols.
摘要翻译：描述了一种用于自适应地调整无编码编码系统的数据通信的方法和系统，包括自适应地估计符号编码长度，确定符号阈值，确定自适应估计的符号编码长度是否小于符号阈值，调整发送功率电平基于第二确定动作，并且基于第二确定动作自适应地调整调制方案。还描述了一种用于解码无编码编码系统的通信的方法和系统，包括接收编码符号，确定所接收的编码符号的长度是否大于编码符号的阈值数量，并且如果所接收的编码符号的长度接收到的编码符号大于编码符号的阈值数。

8. 发明授权

US08737553B2 Sync detection and frequency recovery for satellite systems 有权
标题翻译：卫星系统的同步检测和频率恢复
公开(公告)号：US08737553B2
公开(公告)日：2014-05-27
申请号：US13322167
申请日：2010-05-28
申请人： Paul Gothard Knutson , Dirk Schmitt , Wen Gao
发明人： Paul Gothard Knutson , Dirk Schmitt , Wen Gao
IPC分类号： H04L7/08 , H04L7/04 , H04L27/26 , H04W56/00 , H04H40/90
CPC分类号： H04L27/2678 , H04H40/90 , H04L7/0062 , H04L7/042 , H04L7/10 , H04L27/0014 , H04L27/2613 , H04L27/2656 , H04L27/2679 , H04L2027/0053 , H04L2027/0067 , H04W56/005
摘要： A method of frame sync detection is described. A first and second differential correlation of a data stream is calculated, at a plurality of delay and conjugate multipliers. The first and second differential correlations are convolved with a previous set of differential correlations. A correlation peak is calculated, at a sync detector, using the convolved differential correlations, to detect a frame sync.
摘要翻译：描述帧同步检测的方法。在多个延迟和共轭乘法器处，计算数据流的第一和第二差分相关。第一和第二差分相关性与先前的差分相关集合进行卷积。在同步检测器处，使用卷积差分相关来计算相关峰值，以检测帧同步。

9. 发明授权

US08677219B2 Method and apparatus for adapting a bit interleaver to LDPC codes and modulations under AWGN channel conditions using binary erasure surrogate channels 失效
标题翻译：用于使用二进制擦除代理信道在AWGN信道条件下使比特交织器适应LDPC码和调制的方法和装置
公开(公告)号：US08677219B2
公开(公告)日：2014-03-18
申请号：US12998270
申请日：2009-10-02
申请人： Jing Lei , Wen Gao
发明人： Jing Lei , Wen Gao
IPC分类号： H03M13/00
CPC分类号： H03M13/251 , H03M13/11 , H03M13/1165 , H03M13/255 , H03M13/2757 , H03M13/356 , H04L1/0071 , H04L27/36
摘要： The present invention relates to code-dependent bit interleavers for parallel non-uniform channels. Since the channel dependence of a given code ensemble is dominated by the mutual information between the channel input and output, the present invention proposes to simplify the analysis about the decoding behavior by using a set of surrogate binary erasure channels. The approximation of the actual channel by the surrogate BEC is established on the equivalence of bitwise capacities, which represent the mutual information between the uniformly-distributed binary input and the likelihood ratios of the effective parallel AWGN channels. Moreover, the transition of the erasure probabilities is modeled by a linear difference equation around the decoding threshold SNR, from which we can derive a necessary condition on the convergence of decoding iterations and achieve a useful guideline for the configuration of the bit interleaver.
摘要翻译：本发明涉及用于并行非均匀信道的代码相关比特交织器。由于给定代码集合的信道依赖性由信道输入和输出之间的相互信息支配，本发明提出通过使用一组替代二进制擦除信道来简化关于解码行为的分析。代数BEC的实际信道的近似是基于位容量的等价性来确定的，这表示均匀分布的二进制输入与有效并行AWGN信道的似然比之间的相互信息。此外，擦除概率的转换由围绕解码阈值SNR的线性差分方程建模，从中可以得出解码迭代收敛的必要条件，并为比特交织器的配置实现有用的指导。

10. 发明申请

US20130079046A1 METHODS AND APPARATUS FOR ACCESS, ENABLEMENT AND CONTROL BY DEVICES IN TV WHITE SPACE 有权
标题翻译：方法和设备，用于在电视白天进行设备的访问，启用和控制
公开(公告)号：US20130079046A1
公开(公告)日：2013-03-28
申请号：US13702398
申请日：2011-06-22
申请人： Hou-Shin Chen , Wen Gao
发明人： Hou-Shin Chen , Wen Gao
IPC分类号： H04W72/04
CPC分类号： H04W16/14 , H04W48/10 , H04W72/042 , H04W74/04
摘要： Methods and apparatus for access, enablement and control of devices in TV white space are provided. Methods and apparatus for channel scanning by a device are provided that shorten channel scanning time by using a 5 MHz Measurement Pilot frame at a predetermined location within an enabling device's channel, regardless of the operating bandwidth of the enabling device. Also provided are methods and apparatus for multi-band dynamic station enablement that locate information regarding an enabling device's supported regulatory classes and channel numbers within one accessible frame of information and also provide request and response messages to arrange for enablement of a requesting device on a network. Further, methods and apparatus are provided for identifying an interfering device on a network by providing increased information from within a DSE Registered Location element.
摘要翻译：提供了电视空白设备访问，启用和控制的方法和设备。提供了一种通过设备进行信道扫描的方法和装置，其通过在启用设备的信道内的预定位置处使用5MHz测量导频帧来缩短信道扫描时间，而不管启用设备的工作带宽如何。还提供了用于多频段动态站启用的方法和装置，其在一个可访问的信息框架内定位关于启用设备的支持的监管类别和信道号的信息，并且还提供请求和响应消息以安排在网络上启用请求设备。此外，提供了通过从DSE注册位置元素内提供增加的信息来识别网络上的干扰设备的方法和装置。

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