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11. 发明授权

US09237449B2 Autocorrelation-based spectrum sensing for FM signals 有权
标题翻译：用于FM信号的基于自相关的频谱感测
公开(公告)号：US09237449B2
公开(公告)日：2016-01-12
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： H04B1/18 , H04W16/10 , H04L27/10 , G06F3/033 , H04B1/16
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。

12. 发明授权

US09191937B2 Methods and apparatus for access, enablement and control by devices in TV white space 有权
标题翻译：用于电视空白设备访问，启用和控制的方法和装置
公开(公告)号：US09191937B2
公开(公告)日：2015-11-17
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： H04W4/00 , H04W72/04 , H04W48/10 , H04W16/14
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。

13. 发明授权

US09185455B2 Method and apparatus for using 802.11 WLANs in TV white space 有权
标题翻译：在无线电空间中使用802.11 WLAN的方法和装置
公开(公告)号：US09185455B2
公开(公告)日：2015-11-10
申请号：US13577663
申请日：2011-02-16
申请人： Hou-Shin Chen , Wen Gao
发明人： Hou-Shin Chen , Wen Gao
IPC分类号： H04W4/00 , H04N21/438 , H04N21/2381 , H04N21/2383 , H04N21/2385 , H04N21/4363 , H04N21/4402
CPC分类号： H04N21/4382 , H04N21/2381 , H04N21/2383 , H04N21/2385 , H04N21/43637 , H04N21/440218
摘要： A method and apparatus for using 802.11 Wireless LANs in TV white space are provided that additionally allows coexistence with non-802.11 devices in the same spectrum space. The method and apparatus extend concepts used in traditional 802.11 applications in the MAC and PHY layers so that WLANs can function over TV white space channels. The method and apparatus also facilitates coexistence of non 802.11 devices and existence with other 802.11 applications by extending the Enhanced Distributed Channel Access mechanism used to provide quality of service. An OFDM system with fixed subcarrier spacing is suggested to accommodate spectrum characteristics (variable center frequency and channel bandwidth) of the TVWS.
摘要翻译：提供了一种在TV空白区域中使用802.11无线LAN的方法和装置，该方法和装置还允许与相同频谱空间中的非802.11设备共存。该方法和装置扩展了在MAC和PHY层中传统802.11应用中使用的概念，使得WLAN可以在TV空白信道上运行。该方法和装置还通过扩展用于提供服务质量的增强型分布式信道访问机制来促进非802.11设备的共存和与其他802.11应用的存在。建议具有固定子载波间隔的OFDM系统以适应TVWS的频谱特性（可变中心频率和信道带宽）。

14. 发明授权

US08396166B2 Detection of signals containing sine-wave components through measurement of the power spectral density (PSD) and cyclic spectrum 失效
标题翻译：通过测量功率谱密度（PSD）和循环谱来检测包含正弦波分量的信号
公开(公告)号：US08396166B2
公开(公告)日：2013-03-12
申请号：US12452112
申请日：2007-12-05
申请人： Wen Gao , Hou-Shin Chen
发明人： Wen Gao , Hou-Shin Chen
IPC分类号： H04L27/00
CPC分类号： H04W16/14 , H04B1/1027 , H04W48/16
摘要： A Wireless Regional Area Network (WRAN) receiver comprises a transceiver for communicating with a wireless network over one of a number of channels, and a signal detector for use in forming a supported channel list comprising those ones of the number of channels upon which an Advanced Television Systems Committee (ATSC) DTV (digital television) broadcast signal was not detected. The signal detector performs spectrum sensing as a function of power spectral density (PSD) and cyclic spectrum.
摘要翻译：无线区域网络（WRAN）接收机包括用于通过多个信道中的一个与无线网络通信的收发器，以及用于形成支持的频道列表的信号检测器，所述信道列表包括高级电视系统委员会（ATSC）DTV（数字电视）广播信号未被检测到。信号检测器执行频谱感测作为功率谱密度（PSD）和循环谱的函数。

15. 发明申请

US20120307817A1 METHOD AND APPARATUS FOR USING 802.11 WLANS IN TV WHITE SPACE 有权
标题翻译：在WLAN空间中使用802.11 WLANS的方法和装置
公开(公告)号：US20120307817A1
公开(公告)日：2012-12-06
申请号：US13577663
申请日：2011-02-16
申请人： Hou-Shin Chen , Wen Gao
发明人： Hou-Shin Chen , Wen Gao
IPC分类号： H04L27/04 , H04W84/12
CPC分类号： H04N21/4382 , H04N21/2381 , H04N21/2383 , H04N21/2385 , H04N21/43637 , H04N21/440218
摘要： A method and apparatus for using 802.11 Wireless LANs in TV white space are provided that additionally allows coexistence with non-802.11 devices in the same spectrum space. The method and apparatus extend concepts used in traditional 802.11 applications in the MAC and PHY layers so that WLANs can function over TV white space channels. The method and apparatus also facilitates coexistence of non 802.11 devices and existence with other 802.11 applications by extending the Enhanced Distributed Channel Access mechanism used to provide quality of service. An OFDM system with fixed subcarrier spacing is suggested to accommodate spectrum characteristics (variable center frequency and channel bandwidth) of the TVWS.
摘要翻译：提供了一种在TV空白区域中使用802.11无线LAN的方法和装置，该方法和装置还允许与相同频谱空间中的非802.11设备共存。该方法和装置扩展了在MAC和PHY层中传统802.11应用中使用的概念，使得WLAN可以在TV空白信道上运行。该方法和装置还通过扩展用于提供服务质量的增强型分布式信道访问机制来促进非802.11设备的共存和与其他802.11应用的存在。建议具有固定子载波间隔的OFDM系统以适应TVWS的频谱特性（可变中心频率和信道带宽）。

16. 发明授权

US08311163B2 Time-frequency synchronization and frame number detection for DMB-T systems 有权
标题翻译： DMB-T系统的时频同步和帧号检测
公开(公告)号：US08311163B2
公开(公告)日：2012-11-13
申请号：US12733571
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： H04L7/08 , H04L7/041 , H04L7/043 , H04L27/2602 , H04L27/2656 , H04L27/2675
摘要： A DMB-T receiver supports a single carrier (SC) form of modulation and a multi-carrier form of modulation such as orthogonal frequency division multiplexing (OFDM). Upon receiving a broadcast signal, the DMB-T receiver downconverts the received broadcast signal to a received base-band signal and determines a frame number for each frame by correlating groups of the received symbols in adjacent signal frames. In particular, the receiver determines a maximum right-shift correlation value and a maximum left-shift correlation value. If the magnitude of the maximum right-shift correlation value is greater than, or equal to, the magnitude of the maximum left-shift correlation value, then the maximum right shift correlation value is used to retrieve a frame number from a look-up table. Otherwise, the negative value of the maximum left-shift correlation value is used to retrieve a frame number from the look-up table.
摘要翻译： DMB-T接收机支持单载波（SC）形式的调制和诸如正交频分复用（OFDM）的多载波调制形式。在接收到广播信号时，DMB-T接收机将所接收的广播信号下变频为接收到的基带信号，并通过相邻信号帧中接收的符号组相关来确定每帧的帧号。特别地，接收机确定最大右移相关值和最大左移相关值。如果最大右移相关值的大小大于或等于最大左移相关值的幅度，则最大右移相关值用于从查找表中检索帧号。否则，最大左移相关值的负值用于从查找表中检索帧号。

17. 发明申请

US20120065911A1 METHOD AND APPARATUS FOR SPECTRUM SENSING OF FM WIRELESS MICROPHONE SIGNALS 审中-公开
标题翻译： FM无线麦克风信号的频谱感测方法与装置
公开(公告)号：US20120065911A1
公开(公告)日：2012-03-15
申请号：US13321052
申请日：2010-05-18
申请人： Hou-Shin Chen , Wen Gao
发明人： Hou-Shin Chen , Wen Gao
IPC分类号： G01R23/16 , G06F19/00
CPC分类号： H04B17/382 , H04B17/26
摘要： Methods and apparatus for spectrum sensing for FM wireless microphone signals are provided. The spectrum sensing algorithm developed makes use of the property that the autocorrelation function of an FM 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 FM signal is designed by computing the autocorrelation function of the received signal and matched filtering of the sinusoidal function. The spectrum sensor provided by this approach can reliably detect the target signals when a strong adjacent channel interference exists and the signal power is as low as −114 dBm.
摘要翻译：提供了FM无线麦克风信号的频谱感测方法和装置。开发的频谱感知算法利用FM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FM信号的简单频谱感知算法。当存在强相邻信道干扰并且信号功率低至-114dBm时，由该方法提供的频谱传感器可以可靠地检测目标信号。

18. 发明授权

US08995533B2 Method and apparatus for transmitting and receiving FEC frame headers with variable header modulation 有权
标题翻译：用于发送和接收具有可变报头调制的FEC帧报头的方法和装置
公开(公告)号：US08995533B2
公开(公告)日：2015-03-31
申请号：US12998780
申请日：2009-12-10
申请人： Hou-Shin Chen , Wen Gao
发明人： Hou-Shin Chen , Wen Gao
IPC分类号： H04N7/12 , H04N11/04 , H04L1/00 , H03M13/13 , H03M13/00 , H04L27/20 , H04L27/22 , H04L27/38 , H04N21/2383 , H04N21/438
CPC分类号： H03M13/6555 , H03M13/136 , H04L1/0003 , H04L1/0041 , H04L1/0057 , H04L1/0072 , H04L27/20 , H04L27/22 , H04L27/38 , H04N21/2383 , H04N21/4382
摘要： A frame header of Forward Error Correction (FEC) is provided, suitable for using in the DVB-C2 Standard. 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 FEC header suitable for DVB-C2 Standard is provided in at least one implementation in this disclosure that combines use of two different modulation types for the header information. In addition, the detection Method of the FEC header is described.
摘要翻译：提供了前向纠错（FEC）的帧头，适合在DVB-C2标准中使用。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。在DVB-C2标准中的需求驱动下，在本公开的至少一个实现中提供了适用于DVB-C2标准的高效且可靠的FEC报头，其结合了用于报头信息的两种不同调制类型的使用。另外，描述FEC报头的检测方法。

19. 发明申请

US20150065185A1 METHOD AND APPARATUS FOR DETECTING TRANSMITTERS FOR A WHITE SPACE DEVICE 有权
标题翻译：用于检测白色空间设备的发射机的方法和装置
公开(公告)号：US20150065185A1
公开(公告)日：2015-03-05
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： H04B1/04 , 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.
摘要翻译：本发明涉及无线家庭网关设备和在家庭网关和客户端之间无线地传送音频和/或视频节目的方法，并减轻其上的干扰。具体而言，本发明涉及在两个白色空间信道上发送音频/视频节目，并且交替地停止在所述信道之一上的传输以搜索空白信道上的外部传输。本发明允许无线家庭网关在每个白色空间信道周期性地搜索发射机的同时，将音频/视频节目连续发送到客户端。

20. 发明申请

US20130058247A1 METHOD AND APPARATUS FOR COEXISTENCE OF DIFFERENT BANDWIDTH SYSTEMS IN TV WHITE SPACE 有权
标题翻译：电视白色空间中不同带状系统共存的方法与装置
公开(公告)号：US20130058247A1
公开(公告)日：2013-03-07
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： H04W72/04 , H04W24/00
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电视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。

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