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1. 发明授权

US08532227B2 Method and apparatus for robust and high efficiency FEC frame header recovery 有权
标题翻译：鲁棒高效FEC帧头恢复的方法和装置
公开(公告)号：US08532227B2
公开(公告)日：2013-09-10
申请号：US13378136
申请日：2010-06-28
申请人： Hou-Shin Chen , Wen Gao
发明人： Hou-Shin Chen , Wen Gao
IPC分类号： H03D3/22 , H04L27/22
CPC分类号： H04L1/0057 , H04L1/0004 , H04L1/0045 , H04L1/0072 , H04L27/38
摘要： Methods and apparatus for FEC frame header detection are provided, suitable for use in a DVB-C2 receiver. A first method comprises demodulating with a quadrature phase shift keying (QPSK) demapper, followed by correlation and symmetry measures for detection of a robust FEC header. A second method comprises demodulating with a 16 quadrature amplitude modulation (QAM) demapper, followed by correlation and symmetry measures for detection of a high efficiency FEC leader. Another embodiment comprises using both the first and second methods to find the FEC header because the first symbol of the FEC frame header may be sent either in robust mode or in high efficiency mode. There is also provided a method and apparatus for generating an alternate decision statistic for determining detection of the FEC frame header.
摘要翻译：提供了用于FEC帧头检测的方法和装置，适用于DVB-C2接收机。第一种方法包括使用正交相移键控（QPSK）解映射器进行解调，随后进行用于检测鲁棒FEC报头的相关和对称度量。第二种方法包括利用16个正交幅度调制（QAM）解映射器进行解调，随后进行用于检测高效FEC前导码的相关和对称度量。另一个实施例包括使用第一和第二方法来找到FEC报头，因为FEC帧报头的第一个符号可以以鲁棒模式或高效率模式发送。还提供了一种用于生成用于确定FEC帧头的检测的替代判定统计量的方法和装置。

2. 发明申请

US20120274859A1 METHOD AND APPARATUS FOR INTERFERENCE MITIGATION IN A WIRELESS HOME GATEWAY INTERFACE 审中-公开
标题翻译：无线家庭网关接口干扰减轻的方法和装置
公开(公告)号：US20120274859A1
公开(公告)日：2012-11-01
申请号：US13514303
申请日：2010-02-09
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： H04N5/38
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 device and to interference mitigation techniques on such system. Specifically, the invention relates to transmitting an audio video program on a first channel, receiving a control signal from a remote control indicating interference on said first channel, changing the transmission channel to a second channel, and transmitting data indicating said second channel to said remote control.
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设备之间无线传送音频和/或视频节目的方法以及在这种系统上的干扰减轻技术。具体地，本发明涉及在第一信道上发送音频视频节目，从遥控器接收指示对所述第一信道的干扰的控制信号，将传输信道改变为第二信道，以及向所述远端发送指示所述第二信道的数据控制。

3. 发明申请

US20110317750A1 METHOD AND APPRATUS FOR SPECTRUM SENSING FOR OFDM SYSTEMS EMPLOYING PILOT TONES 有权
标题翻译：用于采样导频信号的OFDM系统的频谱感测的方法和装置
公开(公告)号：US20110317750A1
公开(公告)日：2011-12-29
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： H04B17/00
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。

4. 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.

5. 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。

6. 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。

7. 发明申请

US20120314681A1 METHODS AND APPARATUS FOR MEDIA ACCESS CONTROL IN TV WHITE SPACE 审中-公开
标题翻译：电视白天媒体访问控制的方法与装置
公开(公告)号：US20120314681A1
公开(公告)日：2012-12-13
申请号：US13581626
申请日：2011-03-15
申请人： Hou-Shin Chen , Wen Gao
发明人： Hou-Shin Chen , Wen Gao
IPC分类号： H04W74/00
CPC分类号： H04W72/1231 , H04W16/14 , H04W52/243 , H04W72/0413 , H04W84/12
摘要： Methods and apparatus for using 802.11 Wireless LANs in TV white space that allow networks with overlapping wireless regions to coexist. The methods and apparatus offer a solution to the mutated hidden node problem. Wireless devices communicate with a coexistence manager over a backhaul connection. Signals are sent by a low power station indicating a request to use a portion of spectrum. The coexistence manager communicates with a plurality of second stations that transmit at a higher power level. The plurality of second stations either send a signal to the first station indicating that it can transmit, or send signals so that the first station can determine which interference it is receiving, after which the coexistence manager tells the interfering station to transmit a signal to the first station indicating when it can transmit.
摘要翻译：在电视空白区域使用802.11无线局域网的方法和装置，允许具有重叠无线区域的网络共存。该方法和设备提供了突变隐藏节点问题的解决方案。无线设备通过回程连接与共存管理器进行通信。信号由低电站发送，指示使用频谱的一部分的请求。共存管理器与以更高功率级发送的多个第二站通信。多个第二站向第一站发送一个信号，指示它可以发送，或者发送信号，使得第一站可以确定它正在接收哪个干扰，之后共处理器告诉干扰站将信号发送到第一站指示何时可以传输。

8. 发明申请

US20120128101A1 METHOD AND APPARATUS FOR ROBUST AND HIGH EFFICIENCY FEC FRAME HEADER RECOVERY 有权
标题翻译：用于稳健高效FEC帧头恢复的方法和装置
公开(公告)号：US20120128101A1
公开(公告)日：2012-05-24
申请号：US13378136
申请日：2010-06-28
申请人： Hou-Shin Chen , Wen Gao
发明人： Hou-Shin Chen , Wen Gao
IPC分类号： H04L27/06 , H04L27/22
CPC分类号： H04L1/0057 , H04L1/0004 , H04L1/0045 , H04L1/0072 , H04L27/38
摘要： Methods and apparatus for FEC frame header detection are provided, suitable for use in a DVB-C2 receiver. A first method comprises demodulating with a quadrature phase shift keying (QPSK) demapper, followed by correlation and symmetry measures for detection of a robust FEC header. A second method comprises demodulating with a 16 quadrature amplitude modulation (QAM) demapper, followed by correlation and symmetry measures for detection of a high efficiency FEC leader. Another embodiment comprises using both the first and second methods to find the FEC header because the first symbol of the FEC frame header may be sent either in robust mode or in high efficiency mode. There is also provided a method and apparatus for generating an alternate decision statistic for determining detection of the FEC frame header.
摘要翻译：提供了用于FEC帧头检测的方法和装置，适用于DVB-C2接收机。第一种方法包括使用正交相移键控（QPSK）解映射器进行解调，随后进行用于检测鲁棒FEC报头的相关和对称度量。第二种方法包括利用16个正交幅度调制（QAM）解映射器进行解调，随后进行用于检测高效FEC前导码的相关和对称度量。另一个实施例包括使用第一和第二方法来找到FEC报头，因为FEC帧报头的第一个符号可以以鲁棒模式或高效率模式发送。还提供了一种用于生成用于确定FEC帧头的检测的替代判定统计量的方法和装置。

9. 发明申请

US20110235721A1 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长度调制的FEC帧头的方法和装置
公开(公告)号：US20110235721A1
公开(公告)日：2011-09-29
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： H04N7/26
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。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适用于DVB-C2标准的高效且可靠的FEC报头，其中组合了两种不同调制类型用于报头信息的使用。另外，描述FEC报头的检测方法。

10. 发明申请

US20100035550A1 APPARATUS AND METHOD FOR DETECTING FREE ATSE CHANNELS 有权
标题翻译：用于检测空闲通道的装置和方法
公开(公告)号：US20100035550A1
公开(公告)日：2010-02-11
申请号：US12449078
申请日：2007-06-20
申请人： Wen Gao , Hou-Shin Chen
发明人： Wen Gao , Hou-Shin Chen
IPC分类号： H04B17/00 , H04B1/68
CPC分类号： H04L7/042 , H04L7/06 , H04N5/50 , H04N21/4383
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 an Advanced Television Systems Committee (ATSC) signal detector for use in forming a supported channel list comprising those ones of the number of channels upon which an ATSC signal was not detected. The ATSC signal detector comprises a matched filter that matches to at least a modulated version of an ATSC field sync signal for detecting the presence of an incumbent ATSC broadcast signal.
摘要翻译：无线区域网络（WRAN）接收机包括用于通过多个信道之一与无线网络进行通信的收发机，以及用于形成支持的频道列表的高级电视系统委员会（ATSC）信号检测器，其包括没有检测到ATSC信号的通道数。 ATSC信号检测器包括与ATSC场同步信号的至少调制版本匹配的匹配滤波器，用于检测在线ATSC广播信号的存在。

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