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41. 发明申请

US20120057664A1 METHOD AND APPARATUS FOR SYMBOL TIMING RECOVERY 有权
标题翻译：符号时序恢复的方法和装置
公开(公告)号：US20120057664A1
公开(公告)日：2012-03-08
申请号：US13320128
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： H04L27/06
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： Methods and apparatus for symbol timing recovery are provided. Both a coarse symbol timing recovery method and apparatus, and a fine symbol timing recovery method and apparatus are described which can be used jointly for symbol recovery, for example in phase shift keying receivers. The coarse method involves the use of differential correlations and finding the time difference in peak values of the correlation results. The fine method involves interpolation of a received digital signal, followed by filtering and timing error detection. The error detection signal is further filtered and used to control the interpolator. The methods provide for robust symbol timing synchronization.
摘要翻译：提供了符号定时恢复的方法和装置。描述了粗符号定时恢复方法和装置以及可以联合用于符号恢复的精细符号定时恢复方法和装置，例如在相移键控接收机中。粗略方法涉及使用差分相关性，并找出相关结果峰值的时间差。精细的方法包括对接收到的数字信号进行插值，然后进行滤波和定时误差检测。误差检测信号被进一步滤波并用于控制内插器。这些方法提供鲁棒符号定时同步。

42. 发明申请

US20120045028A1 FEED-FORWARD CARRIER RECOVERY SYSTEM AND METHOD 有权
标题翻译：进给式载波恢复系统和方法
公开(公告)号：US20120045028A1
公开(公告)日：2012-02-23
申请号：US13138953
申请日：2010-05-28
申请人： Dirk Schmitt , Wen Gao , Paul Gothard Knutson
发明人： Dirk Schmitt , Wen Gao , Paul Gothard Knutson
IPC分类号： H04L7/00
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 feedforward phase recovery on a data stream is described. Phase estimation base points are calculated, at a phase detector, for each block of the received data stream. A current phase, at a phase interpolator, between two phase estimation base points. Data stream delays within the phase detector are matched with delays within the phase interpolator.
摘要翻译：描述了数据流上的前馈相位恢复方法。对于接收到的数据流的每个块，在相位检测器处计算相位估计基点。在相位插值器处的两相估计基点之间的电流相位。相位检测器内的数据流延迟与相位内插器内的延迟相匹配。

43. 发明授权

US08107512B2 Method and apparatus for robust automatic frequency control in CDMA systems with constant pilot signals 有权
标题翻译：具有恒定导频信号的CDMA系统中鲁棒自动频率控制的方法和装置
公开(公告)号：US08107512B2
公开(公告)日：2012-01-31
申请号：US10590558
申请日：2004-03-08
申请人： Wen Gao , Zoran Kostic , Alton Shelbourne Keel
发明人： Wen Gao , Zoran Kostic , Alton Shelbourne Keel
IPC分类号： H04B1/00
CPC分类号： H03J7/04 , H03J2200/02 , H04L27/0014 , H04L2027/0055
摘要： There is provided a method for generating an error signal for an automatic frequency control (AFC) loop in a Code Division Multiple Access (CDMA) system. Sign information relating to phase differences in received pilot signals is accumulated. In one embodiment, the accumulated sign information is compared against predetermined threshold levels. The error signal is generated when at least one of the predetermined threshold levels is satisfied. In a second embodiment, the accumulated sign information is decimated. An output of the decimating step is utilized as the error signal for the AFC loop.
摘要翻译：提供了一种用于在码分多址（CDMA）系统中为自动频率控制（AFC）环路产生误差信号的方法。累积与接收到的导频信号中的相位差有关的符号信息。在一个实施例中，将累积的符号信息与预定阈值水平进行比较。当满足预定阈值水平中的至少一个时产生误差信号。在第二实施例中，累积的符号信息被抽取。抽取步骤的输出被用作AFC循环的误差信号。

44. 发明申请

US20110222610A1 FEC FRAME HEADER DESIGN FOR CABLE TELEVISION SIGNALS 有权
标题翻译：用于电缆电视信号的FEC帧头设计
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。

45. 发明授权

US07881343B2 Multi-network overlaid cell detection 有权
标题翻译：多网叠加小区检测
公开(公告)号：US07881343B2
公开(公告)日：2011-02-01
申请号：US10573461
申请日：2003-10-03
申请人： Guillaume Bichot , Jun Li , Wen Gao , Philippe Gilberton
发明人： Guillaume Bichot , Jun Li , Wen Gao , Philippe Gilberton
IPC分类号： H04B7/216 , H04L7/00
CPC分类号： H04W36/0072 , H04B1/7083 , H04W4/06 , H04W36/14 , H04W56/00 , H04W84/12 , H04W88/06
摘要： A communications system includes a wireless telephony network and a wireless Local Area Network (LAN), both accessible by a mobile communications device (16). To facilitate transitioning of the mobile communications device to the wireless LAN from the wireless telephony network, the wireless LAN includes a beacon transmitter, which generates a synchronization channel having a pattern unique to the wireless LAN. The Wireless LAN synchronization channel is received at a first receiver in the mobile communications device together with a synchronization channel from the wireless telephony. The wireless LAN synchronization channel enables the mobile communication device to synchronize with, for transitioning to, the wireless LAN.
摘要翻译：通信系统包括无线电话网络和无线局域网（LAN），无线局域网可由移动通信设备（16）访问。为了便于从无线电话网络将移动通信设备转换到无线LAN，无线LAN包括信标发射机，其生成具有无线LAN唯一的模式的同步信道。无线LAN同步信道与来自无线电话的同步信道一起在移动通信设备中的第一接收机处接收。无线LAN同步信道使得移动通信设备能够与用于转换到无线LAN的同步。

46. 发明申请

US20110013731A1 SPECTRUM SENSING FOR DMB-T SYSTEMS USING PN FRAME HEADERS 审中-公开
标题翻译：使用PN框架头进行DMB-T系统的光谱感应
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。

47. 发明申请

US20100329405A1 TIME-FREQUENCY SYNCHRONIZATION AND FRAME NUMBER DETECTION FOR DMB-T SYSTEMS 审中-公开
标题翻译： DMB-T系统的时频同步和帧数检测
公开(公告)号：US20100329405A1
公开(公告)日：2010-12-30
申请号：US12733570
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： H04L7/00
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 frame timing synchronization from the received signal as a function of frame header mode 1 and frame header mode 3 by correlating groups of received symbols spaced at least two signal frames apart within a sample shift value in a range of plus or minus one.
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，并根据接收信号确定帧定时同步，作为帧头模式1和帧头模式3的函数，符号间隔至少两个信号帧在一个或多个范围内的样本移位值内。

48. 发明申请

US20100242078A1 APPARATUS AND METHOD FOR USE IN A MOBILE/HANDHELD COMMUNICATIONS SYSTEM 审中-公开
标题翻译：用于移动/手持通信系统的装置和方法
公开(公告)号：US20100242078A1
公开(公告)日：2010-09-23
申请号：US12452160
申请日：2008-06-20
申请人： Wen Gao , Benyuan Zhang , Paul Knutson
发明人： Wen Gao , Benyuan Zhang , Paul Knutson
IPC分类号： H04N7/173
CPC分类号： H04L27/02 , H03M13/1102 , H03M13/6356 , H03M13/6362 , H04H20/22 , H04H20/426 , H04H20/57 , H04H20/95 , H04H60/43 , H04L1/0041 , H04L1/0059 , H04L1/0065 , H04L1/0067 , H04L1/0071 , H04L1/0072 , H04L25/03343 , H04N21/242 , H04N21/4302
摘要： An Advanced Television Systems Committee Digital Television (ATSC DTV) transmitter transmits a digital multiplex that includes a legacy DTV channel and a mobile DTV channel. The mobile DTV channel is conveyed in mobile packets that comprise mobile data and additional mobile training information. A mobile packet comprises 207 bytes wherein 2 bytes are header information, 20 bytes are Reed-Solomon (RS) parity information and 185 bytes convey mobile data and mobile training information. The mobile training information is inserted into mobile packets such that the additional training information appears in contiguous positions after convolutional interleaving.
摘要翻译：高级电视系统委员会数字电视（ATSC DTV）发射机发送包括传统DTV信道和移动DTV信道的数字多路复用。在包括移动数据和附加的移动训练信息的移动分组中传送移动DTV信道。移动分组包括207字节，其中2个字节是报头信息，20个字节是里德 - 所罗门（RS）奇偶校验信息，185个字节传送移动数据和移动训练信息。将移动训练信息插入到移动分组中，使得附加训练信息在卷积交织之后出现在相邻位置。

49. 发明申请

US20100202574A1 SPECTRUM SENSING FOR OFDM SIGNALS BY UTILIZING PILOT TONES 有权
标题翻译：用于OFDM信号的频谱感测通过使用PILOT TONES
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。

50. 发明授权

US07684472B2 Method and apparatus for frequency-robust detection of a wideband code division multiple access secondary synchronization channel 有权
标题翻译：用于宽带码分多址辅助同步信道的频率鲁棒检测的方法和装置
公开(公告)号：US07684472B2
公开(公告)日：2010-03-23
申请号：US10612310
申请日：2003-07-02
申请人： Louis Robert Litwin , Alton Shelborne Keel , Wen Gao
发明人： Louis Robert Litwin , Alton Shelborne Keel , Wen Gao
IPC分类号： H04B1/69
CPC分类号： H04B1/70735 , H04B1/7083 , H04B1/7093
摘要： The disclosed embodiments may relate to a method and apparatus for performing a correlation with respect to a received signal. A first correlator may correlate for a real part of a first characteristic of the received signal to produce a first real correlated signal. A second correlator may correlate for an imaginary part of the first characteristic of the received signal to produce a first imaginary correlated signal. A third correlator may correlate for a real part of a second characteristic of the received signal to produce a second real correlated signal. A fourth correlator may correlate for an imaginary part of the second characteristic of the received signal to produce a second imaginary correlated signal. Logic may combine a signal that corresponds to the first real correlated signal, a signal that corresponds to the first imaginary correlated signal, the second real correlated signal and the second imaginary correlated signal to produce a real part of a frequency adjusted signal and an imaginary part of the frequency adjusted signal.
摘要翻译：所公开的实施例可以涉及用于对接收到的信号执行相关的方法和装置。第一相关器可以对接收信号的第一特性的实部进行相关，以产生第一实相关信号。第二相关器可以对接收信号的第一特性的虚部进行相关，以产生第一虚相关信号。第三相关器可以对接收信号的第二特性的实部进行相关，以产生第二实相关信号。第四相关器可以对接收信号的第二特性的虚部进行相关，以产生第二虚相关信号。逻辑可以组合对应于第一实际相关信号的信号，对应于第一虚相关信号的信号，第二实相关信号和第二虚相关信号，以产生频率调整信号和虚部的实部的频率调整信号。

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