公开(公告)号：US20110222610A1

公开(公告)日：2011-09-15

申请号：US12998660

申请日：2009-11-17

申请人： Wen Gao ,  Hou-Shin Chen

发明人： Wen Gao ,  Hou-Shin Chen

IPC分类号： H04N7/32

CPC分类号： H04L1/0057 ,  H03M13/136 ,  H03M13/6555 ,  H04L1/0003 ,  H04L1/0072 ,  H04L27/20 ,  H04L27/22

摘要： An efficient and reliable encoding method suitable for header information in a digital cable television transmission system is provided. An embodiment is shown for FEC frame headers in a DVB-C2 standard, along with the detection algorithm for the FEC header. In the DVB-C2 Standard, Adaptive Coding and Modulation (ACM) or Variable Coding and Modulation (VCM) is applied to each FEC block to provide as much flexibility as possible. As a result, a frame header is attached in front of each FEC frame to inform the coding rate, modulation type and physical layer pipe identifier. Besides the signaling of physical layer related information, the FEC frame header has to provide a structure so that it can be easily and reliably detected in the receiver. Motivated by the need in DVB-C2 Standard, an efficient and reliable method and apparatus to encode the FEC header for DVB-C2 Standard is provided in at least one implementation in this disclosure. In addition, the detection algorithm of the FEC header is described.

摘要翻译： 提供了一种适用于数字有线电视传输系统中标题信息的有效可靠的编码方法。 示出了DVB-C2标准中的FEC帧头的实施例以及用于FEC报头的检测算法。 在DVB-C2标准中，自适应编码和调制（ACM）或可变编码和调制（VCM）被应用于每个FEC块以提供尽可能多的灵活性。 结果，在每个FEC帧的前面附加帧头，以通知编码率，调制类型和物理层管道标识符。 除了物理层相关信息的信令之外，FEC帧报头必须提供一种可以在接收机中容易且可靠地检测的结构。 受DVB-C2标准的需求的驱动，在本公开的至少一个实现中提供了一种用于对DVB-C2标准的FEC报头进行编码的有效且可靠的方法和装置。 另外，描述FEC报头的检测算法。

公开(公告)号：US20110013731A1

公开(公告)日：2011-01-20

申请号：US12733568

申请日：2008-07-23

申请人： Hou-Shin Chen ,  Wen Gao

发明人： Hou-Shin Chen ,  Wen Gao

IPC分类号： H04L27/06

CPC分类号： H04L27/06 ,  H04L27/2602 ,  H04L27/2647 ,  H04N5/4401 ,  H04W72/02

摘要： This dissertation addresses the intersection of personal wireless technology and computational intelligence. The primary research issue addressed is the organization of radio domain knowledge into data structures processable in real-time that integrate machine learning and natural language processing technology into software radio. The thesis defines and develops the cognitive radio architecture. The features needed in the architecture are derived from cognitive radio use cases. These include inferring user communications context, shaping access-network demand, and realizing a protocol for real-time radio spectrum rental. Mathematical foundations for the knowledge-representation architecture are derived by applying point-set topology to the requirements of the use cases. This results in the set-theoretic ontology of radio knowledge defined in the Radio Knowledge Representation Language (RKRL). The mathematical analysis also demonstrates that isochronous radio software is not Turing-computable. Instead, it is constrained to a bounded-recursive subset of the total functions. A rapid-prototype cognitive radio, CR1, was developed to apply these mathematical foundations in a simulated environment. CR1 demonstrated the principles of cognitive radio and focused the research issues. This led to an important contribution of this dissertation, the cognitive radio architecture. This is an open architecture framework for integrating agent-based control, natural language processing, and machine learning technology into software-defined radio platforms.

摘要翻译： 本论文涉及个人无线技术与计算机智能。 解决的主要研究问题是将无线电领域知识组织到可以实时处理的数据结构中，将机器学习和自然语言处理技术整合到软件无线电中。 论文定义和发展了认知无线电架构。 架构中需要的功能来源于认知无线电用例。 这些包括推断用户通信环境，整形接入网络需求，实现实时无线频谱租用协议。 知识表示架构的数学基础是通过将点集拓扑应用于用例的要求而得出的。 这导致无线电知识表示语言（RKRL）中定义的无线电知识的集合理论本体论。 数学分析还表明等时无线电软件不是图灵可计算的。 相反，它被限制为总函数的有界递归子集。 开发了一种快速原型认知无线电CR1，以在模拟环境中应用这些数学基础。 CR1展示了认知无线电的原理，并集中研究问题。 这导致了本论文，认知无线电架构的重要贡献。 这是一个开放架构框架，用于将基于代理的控制，自然语言处理和机器学习技术集成到软件定义的无线电平台中。

公开(公告)号：US20100202574A1

公开(公告)日：2010-08-12

申请号：US12452629

申请日：2007-12-06

申请人： Hou-Shin Chen ,  Wen Gao

发明人： Hou-Shin Chen ,  Wen Gao

IPC分类号： H04L27/06

CPC分类号： H04L27/2647

摘要： An apparatus comprises a downconverter for providing a signal that may be a received orthogonal frequency division multiplexed (OFDM) symbols from a selected channel, each OFDM symbol comprising N subcarriers at least some of which are pilot subcarriers; and a processor that (a) correlates the received OFDM symbols for providing at least one correlated value, (b) generates a metric value as a function of the at least one correlated value and (b) compares the metric value to a threshold value for detecting if an incumbent signal is present.

摘要翻译： 一种装置包括下变频器，用于提供可以是来自所选信道的接收的正交频分复用（OFDM）符号的信号，每个OFDM符号包括N个子载波，其中至少一些是导频子载波; （a）使所接收的OFDM符号相关联以提供至少一个相关值，（b）生成作为所述至少一个相关值的函数的度量值，以及（b）将度量值与阈值进行比较，以便 检测是否存在现有信号。

公开(公告)号：US09350489B2

公开(公告)日：2016-05-24

申请号：US12998660

申请日：2009-11-17

申请人： Wen Gao ,  Hou-Shin Chen

发明人： Wen Gao ,  Hou-Shin Chen

IPC分类号： H04L27/20 ,  H04L1/00 ,  H03M13/13 ,  H03M13/00 ,  H04L27/22

CPC分类号： H04L1/0057 ,  H03M13/136 ,  H03M13/6555 ,  H04L1/0003 ,  H04L1/0072 ,  H04L27/20 ,  H04L27/22

摘要： An efficient and reliable encoding method suitable for header information in a digital cable television transmission system is provided. An embodiment is shown for FEC frame headers in a DVB-C2 standard, along with the detection algorithm for the FEC header. In the DVB-C2 Standard, Adaptive Coding and Modulation (ACM) or Variable Coding and Modulation (VCM) is applied to each FEC block to provide as much flexibility as possible. As a result, a frame header is attached in front of each FEC frame to inform the coding rate, modulation type and physical layer pipe identifier. Besides the signaling of physical layer related information, the FEC frame header has to provide a structure so that it can be easily and reliably detected in the receiver. Motivated by the need in DVB-C2 Standard, an efficient and reliable method and apparatus to encode the FEC header for DVB-C2 Standard is provided in at least one implementation in this disclosure. In addition, the detection algorithm of the FEC header is described.

摘要翻译： 提供了一种适用于数字有线电视传输系统中标题信息的有效可靠的编码方法。 示出了DVB-C2标准中的FEC帧头的实施例以及用于FEC报头的检测算法。 在DVB-C2标准中，自适应编码和调制（ACM）或可变编码和调制（VCM）被应用于每个FEC块以提供尽可能多的灵活性。 结果，在每个FEC帧的前面附加帧头，以通知编码率，调制类型和物理层管道标识符。 除了物理层相关信息的信令之外，FEC帧报头必须提供一种可以在接收机中容易且可靠地检测的结构。 受DVB-C2标准的需求的驱动，在本公开的至少一个实现中提供了一种用于对DVB-C2标准的FEC报头进行编码的有效且可靠的方法和装置。 另外，描述FEC报头的检测算法。

公开(公告)号：US09282557B2

公开(公告)日：2016-03-08

申请号：US13817560

申请日：2010-08-26

申请人： Wen Gao ,  Hou-Shin Chen

发明人： Wen Gao ,  Hou-Shin Chen

IPC分类号： H04J4/00 ,  H04J3/06 ,  H04W72/04 ,  H04W36/00 ,  H04W48/16 ,  H04W56/00 ,  H04W84/12 ,  H04W88/08

CPC分类号： H04W72/0446 ,  H04J3/0641 ,  H04J3/0673 ,  H04W16/14 ,  H04W36/0061 ,  H04W48/10 ,  H04W48/16 ,  H04W56/0015 ,  H04W56/002 ,  H04W72/044 ,  H04W84/12 ,  H04W88/08

摘要： A method and apparatus are described including defining a neighbor set for each access point, selecting a first clock in a first access point, the selected clock having a highest accuracy as a grand master clock, advising neighboring access points to synchronize with the selected grand master clock and transmitting a message to schedule a quiet period based on the grand master clock. Also described are a method and apparatus including receiving a beacon message, inspecting clock descriptors in the beacon message, selecting a best master clock responsive to the inspection and transmitting a message to schedule a quiet period based on the selected best master clock.

公开(公告)号：US20150189456A1

公开(公告)日：2015-07-02

申请号：US13980069

申请日：2011-01-18

申请人： Hou-Shin Chen ,  Wen Gao

发明人： Hou-Shin Chen ,  Wen Gao

IPC分类号： H04R29/00 ,  H04R3/00

CPC分类号： H04R29/004 ,  H04K3/822 ,  H04K2203/12 ,  H04R3/00 ,  H04R2410/00 ,  H04R2420/07 ,  H04R2430/00

摘要： A method and apparatus for spectrum sensing for general wireless microphone signals are provided. The spectrum sensing algorithm developed makes use of the property that the autocorrelation function of a wireless microphone signal is a sinusoidal function provided that the frequency deviation is much smaller than the carrier frequency and the correlation delay is small. Based on this property, a simple spectrum sensing algorithm for the wireless microphone signal is designed by computing the auto-correlation function of the received signal and matched filtering of the sinusoidal function. The tones detected are further verified to see if they are located at one of the possible wireless microphone frequencies.

摘要翻译： 提供了一种用于一般无线麦克风信号的频谱感测的方法和装置。 开发的频谱感知算法利用无线麦克风信号的自相关函数为正弦函数的性质，只要频率偏差远小于载波频率，相关延迟小。 基于该性质，通过计算接收信号的自相关函数和正弦函数的匹配滤波来设计无线麦克风信号的简单频谱感知算法。 检测到的音调被进一步验证，以查看它们是否位于可能的无线麦克风频率之一。

公开(公告)号：US08867634B2

公开(公告)日：2014-10-21

申请号：US13138585

申请日：2010-03-12

申请人： Hou-Shin Chen ,  Wen Gao

发明人： Hou-Shin Chen ,  Wen Gao

IPC分类号： H04K1/10 ,  H04L27/00 ,  H04L5/00

CPC分类号： H04L27/0006 ,  H04L5/0007

摘要： Methods and apparatuses for OFDM spectrum sensing are provided. The proposed spectrum sensing algorithms are based on Time-Domain Symbol Cross-Correlation (TDSC-MRC and TDSC-NP methods) and can be applied to all existing wireless OFDM systems. The statistical behaviors of the TDSC-based spectrum sensors are explicitly analyzed. In addition, the spectrum sensing method employing the Cyclic Prefix of the OFDM modulated signals (CP method) is described for comparison purposes. The DVB-T Standard is adopted as an application example to illustrate the proposed spectrum sensing algorithms. Simulation results show that the TDSC-MRC method outperforms the CP method for all values of CP ratio considered. The TDSC methods have the advantage that the detection performances are the same for different CP ratios, while the detection performance of the CP method degrades dramatically when the CP ratio becomes small.

摘要翻译： 提供了OFDM频谱感测的方法和装置。 所提出的频谱感知算法基于时域符号交叉相关（TDSC-MRC和TDSC-NP方法），并且可以应用于所有现有的无线OFDM系统。 明确分析了基于TDSC的频谱传感器的统计特性。 另外，为了进行比较，描述了使用OFDM调制信号的循环前缀的频谱感测方法（CP方法）。 采用DVB-T标准作为应用示例来说明所提出的频谱感知算法。 模拟结果表明，考虑到所有CP比值，TDSC-MRC方法优于CP方法。 TDSC方法的优点在于，对于不同的CP比，检测性能相同，而当CP比变小时，CP方法的检测性能显着降低。

公开(公告)号：US20130148639A1

公开(公告)日：2013-06-13

申请号：US13817560

申请日：2010-08-26

申请人： Wen Gao ,  Hou-Shin Chen

发明人： Wen Gao ,  Hou-Shin Chen

IPC分类号： H04W72/04

CPC分类号： H04W72/0446 ,  H04J3/0641 ,  H04J3/0673 ,  H04W16/14 ,  H04W36/0061 ,  H04W48/10 ,  H04W48/16 ,  H04W56/0015 ,  H04W56/002 ,  H04W72/044 ,  H04W84/12 ,  H04W88/08

摘要： A method and apparatus are described including defining a neighbor set for each access point, selecting a first clock in a first access point, the selected clock having a highest accuracy as a grand master clock, advising neighboring access points to synchronize with the selected grand master clock and transmitting a message to schedule a quiet period based on the grand master clock. Also described are a method and apparatus including receiving a beacon message, inspecting clock descriptors in the beacon message, selecting a best master clock responsive to the inspection and transmitting a message to schedule a quiet period based on the selected best master clock.

摘要翻译： 描述了一种方法和装置，包括为每个接入点定义邻居集合，在第一接入点中选择第一时钟，所选择的时钟具有最高精度作为大主时钟，建议相邻接入点与所选择的大主机同步 时钟，并发送消息，以根据大主时钟安排安静时段。 还描述了一种方法和装置，包括接收信标消息，检查信标消息中的时钟描述符，响应于检查选择最佳主时钟，并发送消息以基于所选择的最佳主时钟来安排安静时段。

公开(公告)号：US08433006B2

公开(公告)日：2013-04-30

申请号：US12452629

申请日：2007-12-06

申请人： Hou-Shin Chen ,  Wen Gao

发明人： Hou-Shin Chen ,  Wen Gao

IPC分类号： H03D1/00 ,  H04L27/06

CPC分类号： H04L27/2647

摘要： An apparatus comprises a downconverter for providing a signal that may be a received orthogonal frequency division multiplexed (OFDM) symbols from a selected channel, each OFDM symbol comprising N subcarriers at least some of which are pilot subcarriers; and a processor that (a) correlates the received OFDM symbols for providing at least one correlated value, (b) generates a metric value as a function of the at least one correlated value and (b) compares the metric value to a threshold value for detecting if an incumbent signal is present.

摘要翻译： 一种装置包括下变频器，用于提供可以是来自所选信道的接收的正交频分复用（OFDM）符号的信号，每个OFDM符号包括N个子载波，其中至少一些是导频子载波; （a）使所接收的OFDM符号相关联以提供至少一个相关值，（b）生成作为所述至少一个相关值的函数的度量值，以及（b）将度量值与阈值进行比较，以便 检测是否存在现有信号。

公开(公告)号：US20120238227A1

公开(公告)日：2012-09-20

申请号：US13514584

申请日：2009-12-21

申请人： Wen Gao ,  Hou-Shin Chen

发明人： Wen Gao ,  Hou-Shin Chen

IPC分类号： H04B1/04

CPC分类号： H04W16/10 ,  H04L27/10

摘要： A method and system for detection of available a white space channel in an area of licensed transmitters includes a detector which utilizes the autocorrelation analysis of a channel in an frequency modulated (FM) band. Calculation of the autocorrelation excludes an initial set of correlation delay values such that large values of autocorrelation are removed. The remaining autocorrelation based on higher correlation delay values exposes the sinusoidal nature of an FM transmitter operating in the selected channel. White space becomes available to a user if no transmitter is detected using the autocorrelation detection method.

摘要翻译： 用于在许可发射机的区域中检测可用的空白信道的方法和系统包括利用频率调制（FM）频带中的信道的自相关分析的检测器。 自相关的计算排除了初始的相关延迟值集合，从而消除了大的自相关值。 基于较高相关延迟值的剩余自相关显示在所选频道中操作的FM发射机的正弦特性。 如果没有使用自相关检测方法检测到发射机，则空白可用于用户。