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1. 发明授权

US07675994B2 Packet identification mechanism at the transmitter and receiver for an enhanced ATSC 8-VSB system 失效
标题翻译：用于增强型ATSC 8-VSB系统的发射机和接收机的分组识别机制
公开(公告)号：US07675994B2
公开(公告)日：2010-03-09
申请号：US10118876
申请日：2002-04-09
申请人： Vasanth R. Gaddam , Dagnachew Birru
发明人： Vasanth R. Gaddam , Dagnachew Birru
IPC分类号： H04L27/04
CPC分类号： H04N21/2383 , H04L1/0041 , H04L1/006 , H04L1/0065 , H04L1/007 , H04L27/02 , H04N21/4382
摘要： A flexible digital transmission system that improves upon the ATSC A/53 HDTV signal transmission standard. The system includes a digital signal transmitter for generating a first Advanced Television Systems Committee (ATSC) standard encoded 8-VSB bit stream and, for generating an encoded new robust bit stream for transmitting high priority information bits, wherein symbols of the new bit stream are capable of being transmitted according to a transmission mode including: a 2-VSB mode and a 4-VSB transmission mode. The standard 8-VSB bit stream and new bit stream may be simultaneously transmitted over a terrestrial channel according to a broadcaster defined bit-rate ratio. The transmission system includes a control mechanism for generating information needed for encoding robust packets at a transmitter device. It also includes a mechanism for encoding control parameters and multiplexes the generated information with the standard and robust bit-streams for transmission. A receiver architecture is additionally provided to decode standard and robust bit-streams transmitted by the transmitter device.
摘要翻译：灵活的数字传输系统，改进了ATSC A / 53 HDTV信号传输标准。该系统包括用于产生第一高级电视系统委员会（ATSC）标准编码的8-VSB比特流的数字信号发射机，并且用于产生用于发送高优先级信息比特的编码的新鲁棒比特流，其中新比特流的符号是能够根据包括2-VSB模式和4-VSB传输模式的传输模式进行传输。标准8-VSB比特流和新比特流可以根据广播器定义的比特率比率通过地面信道同时发送。传输系统包括用于产生在发射机设备处对鲁棒分组进行编码所需的信息的控制机制。它还包括用于编码控制参数的机制，并将所生成的信息与标准和鲁棒的比特流多路复用以进行传输。另外提供接收机架构来解码由发射机设备发射的标准和鲁棒的比特流。

2. 发明授权

US08773994B2 Signaling method and apparatus to enable multiple antenna communications in wireless systems 有权
标题翻译：用于在无线系统中实现多天线通信的信令方法和装置
公开(公告)号：US08773994B2
公开(公告)日：2014-07-08
申请号：US13263136
申请日：2010-03-24
申请人： Monisha Ghosh , Vasanth R. Gaddam
发明人： Monisha Ghosh , Vasanth R. Gaddam
IPC分类号： G01R31/08
CPC分类号： H04L1/0025 , H04B7/0613 , H04L7/042
摘要： A method (200) for signaling a transmission mode in a wireless communication networks comprises selecting a signature sequence corresponding to the transmission mode of a transmitting device (S210); forming, for each antenna in the transmitting device, a synchronization field based on the selected signature sequence, wherein the synchronization field is included in a preamble (S220); and transmitting, from each antenna in the transmitting device, the data frame that comprises the preamble.
摘要翻译：一种用于在无线通信网络中发送传输模式的信令的方法（200）包括：选择与传输设备的传输模式对应的签名序列（S210）; 针对所述发送装置中的每个天线形成基于所选择的签名序列的同步字段，其中所述同步字段包括在前导码中（S220）; 并且从发送装置中的每个天线发送包括前导码的数据帧。

3. 发明申请

US20100067428A1 METHOD AND SYSTEM OF BEACON TRANSMISSION AND RECEPTION 有权
标题翻译：信标传输和接收的方法和系统
公开(公告)号：US20100067428A1
公开(公告)日：2010-03-18
申请号：US12377642
申请日：2007-07-12
申请人： Carlos Cordeiro , Monisha Ghosh , Vasanth R. Gaddam , Kiran S. Challapali
发明人： Carlos Cordeiro , Monisha Ghosh , Vasanth R. Gaddam , Kiran S. Challapali
IPC分类号： H04B7/14
CPC分类号： H04W48/08 , H04W84/12
摘要： A system includes a first primary wireless system (120) that communicates over a first range, and a first beaconing device (130) associated with the first primary wireless system (120). The first beaconing device (130) communicates over at least at a second range, wherein the second range is greater than the first range. The first beaconing device listens for beacons (510) from other beaconing devices (130) associated with other primary wireless systems (120) on a plurality of channels over which the other primary systems may operate. After listening for beacons from the other beaconing devices (130) associated with other primary wireless systems, the first beaconing device transmits a first beacon (510) to a wireless device (114) of a secondary wireless system (110) that may communicate over the second range. The first beacon includes data indicating an occupation of a first one of the channels by the first primary wireless system (120).
摘要翻译：系统包括在第一范围上通信的第一主要无线系统（120）和与第一主要无线系统（120）相关联的第一信标设备（130）。第一信标装置（130）至少在第二范围进行通信，其中第二范围大于第一范围。第一信标设备从其他主要系统可以在其上操作的多个信道上侦听与其他主要无线系统（120）相关联的其他信标设备（130）的信标（510）。在从与其他主要无线系统相关联的其他信标设备（130）收听信标之后，第一信标设备向第二无线系统（110）的无线设备（114）发送第一信标（510），第二信标可以通过第二范围。第一信标包括指示由第一主无线系统（120）占用第一信道的数据。

4. 发明申请

US20100020732A1 PHYSICAL LAYER SUPERFRAME, FRAME, PREAMBLE AND CONTROL HEADER FOR IEEE 802.22 WRAN COMMUNICATION SYSTEMS 审中-公开
标题翻译： IEEE 802.22 WRAN通信系统的物理层超帧，帧，前缀和控制头
公开(公告)号：US20100020732A1
公开(公告)日：2010-01-28
申请号：US12441595
申请日：2007-09-21
申请人： Vasanth R. Gaddam , Dagnachew Birru
发明人： Vasanth R. Gaddam , Dagnachew Birru
IPC分类号： H04L12/28 , H04B7/00
CPC分类号： H04B7/2656 , H04H20/72 , H04N5/50 , H04N21/2383 , H04N21/2385 , H04N21/6131 , H04W72/04
摘要： The present invention provides a system (900), apparatus (700, 800) and method for frames, preambles and control headers for a physical (PHY) layer of the 802.22 WRAN specification. Some of the main features of the present invention include: Superframe and Frame structure; Superframe Preamble (and CBP Preamble); Frame Preamble; Superframe Control Header (SCH); and Frame Control Header (FCH).
摘要翻译：本发明提供了一种用于802.22 WRAN规范的物理（PHY）层的帧，前导码和控制报头的系统（900），装置（700,800）和方法。本发明的一些主要特征包括：超帧和帧结构; 超帧前缀（和CBP前导码）; 帧前缀; 超帧控制头（SCH）; 和帧控制头（FCH）。

5. 发明申请

US20120039321A1 SIGNALING METHOD AND APPARATUS TO ENABLE MULTIPLE ANTENNA COMMUNICATIONS IN WIRELESS SYSTEMS 有权
标题翻译：在无线系统中启用多个天线通信的信号方法和装置
公开(公告)号：US20120039321A1
公开(公告)日：2012-02-16
申请号：US13263136
申请日：2010-03-24
申请人： Monisha Ghosh , Vasanth R. Gaddam
发明人： Monisha Ghosh , Vasanth R. Gaddam
IPC分类号： H04W4/00 , H04W56/00
CPC分类号： H04L1/0025 , H04B7/0613 , H04L7/042
摘要： A method (200) for signaling a transmission mode in a wireless communication networks comprises selecting a signature sequence corresponding to the transmission mode of a transmitting device (S210); forming, for each antenna in the transmitting device, a synchronization field based on the selected signature sequence, wherein the synchronization field is included in a preamble (S220); and transmitting, from each antenna in the transmitting device, the data frame that comprises the preamble.
摘要翻译：一种用于在无线通信网络中发送传输模式的信令的方法（200）包括：选择与传输设备的传输模式对应的签名序列（S210）; 针对所述发送装置中的每个天线形成基于所选择的签名序列的同步字段，其中所述同步字段包括在前导码中（S220）; 并且从发送装置中的每个天线发送包括前导码的数据帧。

6. 发明申请

US20100311341A1 RADIO SENSOR FOR DETECTING WIRELESS MICROPHONE SIGNALS AND A METHOD THEREOF 有权
标题翻译：用于检测无线麦克风信号的无线电传感器及其方法
公开(公告)号：US20100311341A1
公开(公告)日：2010-12-09
申请号：US12865478
申请日：2009-02-16
申请人： Vasanth R. Gaddam , Monisha Ghosh
发明人： Vasanth R. Gaddam , Monisha Ghosh
IPC分类号： H04B1/00
CPC分类号： H04L27/00
摘要： Wireless microphone signals are detected by processing an input signal to determine a number of frequency bins within a channel frequency band having an energy level above a first predefined threshold (S510); identifying locations of the frequency bins having an energy level above the first predefined threshold, when the number of bins is greater than zero (S520, S530); for each frequency bin having an energy level above the first predefined threshold, processing signals within a narrow frequency band of the frequency bin (S570); determining a number of signal peaks within the narrow frequency band that are above a second predefined threshold (S575); and generating a message indicating a presence or an absence of a microphone signal based on the number of signal peaks (S590, S595).
摘要翻译：通过处理输入信号来检测无线麦克风信号，以确定具有高于第一预定义阈值的能量水平的信道频带内的频率仓的数量（S510）; 当所述箱数大于零时，识别具有高于所述第一预定阈值的能级的频率仓的位置（S520，S530）; 对于具有高于第一预定阈值的能级的每个频率仓，处理频率仓的窄频带内的处理信号（S570）; 确定在所述窄频带内的高于第二预定义阈值的信号峰值的数量（S575）; 以及基于信号峰值的数量产生指示麦克风信号的存在或不存在的消息（S590，S595）。

7. 发明申请

US20090323610A1 BONDING ADJACENT TV BANDS, SUB-CARRIER ALLOCATION, DATA BURST DEFINITION AND SPREAD OFDMA IN A PHYSICAL LAYER FOR 802.22 WRAN COMMUNICATION SYSTEMS 审中-公开
标题翻译：绑定相邻的电视台，子载波分配，数据波特率定义和在物理层中传播802dB通信系统
公开(公告)号：US20090323610A1
公开(公告)日：2009-12-31
申请号：US12441610
申请日：2007-09-21
申请人： Vasanth R. Gaddam , Dagnachew Birru
发明人： Vasanth R. Gaddam , Dagnachew Birru
IPC分类号： H04N7/24 , H04W4/00
CPC分类号： H04L5/023 , H04L27/0006 , H04W16/10 , H04W16/14
摘要： A method and system of calculating debt service capacity of a loan applicant includes capturing, indexing, reclassifying and grouping transaction data and profile data of the loan applicant. Next, capturing a loan structure, risk factors, financial variables and reconciliation rules and finally using the aforementioned and loan applicants' data and cash flow projections to calculate loan applicants' debt service capacity with time value of money calculations.
摘要翻译：贷款申请人偿债能力的计算方法和系统包括对贷款申请人的交易数据和资料数据的采集，索引，重新分类和归类。接下来，收集贷款结构，风险因素，财务变量和对账规则，最后使用上述和贷款申请人的数据和现金流量预测来计算贷款申请人的债务偿还能力与时间价值计算。

8. 发明授权

US07570720B2 FEC scheme for encoding two bit-streams 有权
标题翻译：用于编码两个比特流的FEC方案
公开(公告)号：US07570720B2
公开(公告)日：2009-08-04
申请号：US10806737
申请日：2004-03-23
申请人： Vasanth R. Gaddam , Dave Bryan , Patrick Kelliher
发明人： Vasanth R. Gaddam , Dave Bryan , Patrick Kelliher
IPC分类号： H03D1/00
CPC分类号： H03M13/253 , H03M13/1515 , H03M13/256 , H03M13/27 , H03M13/2936 , H03M13/41 , H03M13/6538 , H04N5/4401
摘要： An encoding system is configured to allow data to be transmitted at one of two selectable bit-error-rate quality factors. The first bit-error-rate quality factor selection corresponds to the conventional ATSC FEC encoding systems, and the second bit-error-rate quality factor selection provides an ATSC-like FEC encoding scheme that substantially improves the bit-error-rate. The first quality factor selection effects a 2/3 trellis encoding, whereas the higher quality factor selection effects a 1/3 trellis encoding. Because the high-quality trellis encoding rate of 1/3 is half the lower-quality trellis encoding rate of 2/3, the data rate of this high-quality encoded bit-stream is half that of the conventional lower-quality encoded bit-stream. The 1/3 trellis encoding is effected using an ATSC-compatible encoding and a modified symbol mapping. The encoding scheme provides 2:1 data redundancy and the symbol mapping provides a maximum distance for the redundant encoding. By combining techniques that each decrease the likelihood of an uncorrectable error at the receiver, the substantial improvement in bit-error-rate can be achieved. At the receiver, a single trellis decoder with different metric tables is used to decode the two bit-streams, thereby providing substantial compatibility with ATSC-compatible receivers.
摘要翻译：编码系统被配置为允许以两个可选误码率质量因子中的一个发送数据。第一个误码率质量因子选择对应于传统的ATSC FEC编码系统，第二个误码率质量因子选择提供了基本上提高误比特率的类似ATSC的FEC编码方案。第一个品质因素选择会影响2/3网格编码，而较高品质因子选择会影响1/3网格编码。因为1/3的高质量网格编码率是2/3的较低质量网格编码率的一半，因此该高质量编码比特流的数据速率是传统较低质量编码比特流的一半，流。使用ATSC兼容编码和修改的符号映射来实现1/3网格编码。编码方案提供2：1数据冗余，符号映射为冗余编码提供最大距离。通过组合各种技术，可以降低接收机处的不可校正误差的可能性，可以实现误码率的实质性改善。在接收机处，使用具有不同度量表的单个网格解码器对两个比特流进行解码，从而提供与ATSC兼容接收机的实质兼容性。

9. 发明授权

US07111221B2 Digital transmission system for an enhanced ATSC 8-VSB system 有权
标题翻译：用于增强型ATSC 8-VSB系统的数字传输系统
公开(公告)号：US07111221B2
公开(公告)日：2006-09-19
申请号：US10127531
申请日：2002-04-22
申请人： Dagnachew Birru , Vasanth R. Gaddam
发明人： Dagnachew Birru , Vasanth R. Gaddam
IPC分类号： H03M13/00
CPC分类号： H04N21/4382 , H04N21/2383
摘要： A transmission system includes a first forward error correction unit, a robust processor unit, a trellis encoder unit, a second forward error correction unit, and a transmitter device. The first forward error correction unit encodes packets belonging to robust and normal bit streams. The robust processor unit receives the encoded robust packets and processes the robust packets to generate the robust bit stream. The trellis encoder unit produces a stream of trellis encoded data bits corresponding to bits of the normal and robust bit streams by mapping encoded data bits of the robust packets into symbols according to one or more symbol mapping schemes. The second forward error correction unit reads in only packets of the robust bit stream and enables generation of parity bytes only for the robust packets. The transmitter device transmits the robust bit stream over a communications channel to a receiver device.
摘要翻译：传输系统包括第一前向纠错单元，鲁棒处理器单元，网格编码器单元，第二前向纠错单元和发射机设备。第一前向纠错单元对属于鲁棒和正常比特流的分组进行编码。鲁棒的处理器单元接收编码的鲁棒分组并处理鲁棒分组以产生鲁棒的比特流。网格编码器单元通过根据一个或多个符号映射方案将鲁棒分组的编码数据位映射成符号，产生对应于正常和鲁棒比特流的比特的网格编码数据比特流。第二前向纠错单元仅读入鲁棒比特流的分组，并且仅允许为鲁棒分组生成奇偶校验字节。发射机设备通过通信信道将鲁棒比特流发送到接收机设备。

10. 发明授权

US08432854B2 Method and system of beacon transmission and reception 有权
标题翻译：信标发射和接收的方法和系统
公开(公告)号：US08432854B2
公开(公告)日：2013-04-30
申请号：US12377642
申请日：2007-07-12
申请人： Carlos Cordeiro , Monisha Ghosh , Vasanth R. Gaddam , Kiran S. Challapali
发明人： Carlos Cordeiro , Monisha Ghosh , Vasanth R. Gaddam , Kiran S. Challapali
IPC分类号： H04W4/00
CPC分类号： H04W48/08 , H04W84/12
摘要： A system includes a first primary wireless system (120) that communicates over a first range, and a first beaconing device (130) associated with the first primary wireless system (120). The first beaconing device (130) communicates over at least at a second range, wherein the second range is greater than the first range. The first beaconing device listens for beacons (510) from other beaconing devices (130) associated with other primary wireless systems (120) on a plurality of channels over which the other primary systems may operate. After listening for beacons from the other beaconing devices (130) associated with other primary wireless systems, the first beaconing device transmits a first beacon (510) to a wireless device (114) of a secondary wireless system (110) that may communicate over the second range. The first beacon includes data indicating an occupation of a first one of the channels by the first primary wireless system (120).
摘要翻译：系统包括在第一范围上通信的第一主要无线系统（120）和与第一主要无线系统（120）相关联的第一信标设备（130）。第一信标装置（130）至少在第二范围进行通信，其中第二范围大于第一范围。第一信标设备从其他主要系统可以在其上操作的多个信道上侦听与其他主要无线系统（120）相关联的其他信标设备（130）的信标（510）。在从与其他主要无线系统相关联的其他信标设备（130）收听信标之后，第一信标设备向第二无线系统（110）的无线设备（114）发送第一信标（510），第二信标可以通过第二范围。第一信标包括指示由第一主无线系统（120）占用第一信道的数据。

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