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51. 发明申请

US20050050130A1 Ranging in multi-band OFDM communications systems 审中-公开
标题翻译：在多频带OFDM通信系统中进行测距
公开(公告)号：US20050050130A1
公开(公告)日：2005-03-03
申请号：US10932894
申请日：2004-09-02
申请人： Anand Dabak , Anuj Batra , Jaiganesh Balakrishnan
发明人： Anand Dabak , Anuj Batra , Jaiganesh Balakrishnan
IPC分类号： G06F17/15 , H04J1/16 , H04J3/06 , H04L7/04 , H04L27/26
CPC分类号： H04J1/16 , H04J3/0682 , H04L7/041 , H04L27/2601
摘要： System and method for determining a separation between communicating devices. A preferred embodiment comprises a first device transmitting a signal over multiple subbands to a second device, the second device determining a timing for the signal by processing the signal in each subband separately. The second device then transmits a signal back to the first device along with timing information (again, over multiple subbands). The first device then determines a timing for the signal and by determining a difference in the timing information provided by the second device and timing information it determines, the first device can compute the separation between it and the second device. The use of multiple subbands can dedicate more bandwidth to the transmission of the signal, permitting greater resolution.
摘要翻译：用于确定通信设备之间的间隔的系统和方法。优选实施例包括将多个子带上的信号发送到第二设备的第一设备，第二设备通过分别处理每个子带中的信号来确定信号的定时。然后，第二设备连同定时信息（再次，通过多个子带）一起发送回到第一设备的信号。然后，第一设备确定信号的定时，并且通过确定由第二设备提供的定时信息和它确定的定时信息的差异，第一设备可以计算它与第二设备之间的间隔。使用多个子带可以将更多的带宽专用于信号的传输，从而允许更高的分辨率。

52. 发明授权

US06603412B2 Interleaved coder and method 有权
标题翻译：交错编码器和方法
公开(公告)号：US06603412B2
公开(公告)日：2003-08-05
申请号：US10033135
申请日：2001-12-28
申请人： Alan Gatherer , Anand Dabak , Timothy M. Schmidl , John Linn
发明人： Alan Gatherer , Anand Dabak , Timothy M. Schmidl , John Linn
IPC分类号： H03M700
CPC分类号： H03M13/6566 , H03M13/271 , H03M13/2771
摘要： Quasi-parallel read/write interleaver architecture for data blocks by sequential spreading of variable size data subblocks into memory banks with bank address contention initiating the next data subblock. Iterative Turbo decoders with MAP decoders use such quasi-parallel interleavers and deinterleavers.
摘要翻译：用于数据块的准并行读/写交织器架构通过将可变大小的数据子块顺序扩展到具有启动下一数据子块的存储体地址争用的存储体。具有MAP解码器的迭代Turbo解码器使用这种准并行交织器和解交织器。

53. 发明授权

US08605054B2 Touch-sensitive interface and method using orthogonal signaling 有权
标题翻译：使用正交信令的触敏接口和方法
公开(公告)号：US08605054B2
公开(公告)日：2013-12-10
申请号：US12807333
申请日：2010-09-02
申请人： William R. Krenik , Anand Dabak
发明人： William R. Krenik , Anand Dabak
IPC分类号： G06F3/041 , G06F3/038
CPC分类号： G06F3/044 , G06F3/0418
摘要： A touch screen system includes a capacitive touch screen (1) including a plurality of row conductors (7-1,2 . . . n) and a column conductor (5-1). A plurality of cotemporaneous orthogonal excitation signals (S1(t), S2(t) . . . Sn(t)) are simultaneously driven onto the row conductors, respectively. The capacitively coupled signals on the column conductor may be influenced by a touch (10) on the capacitive touch screen. Receiver circuitry (50) includes a sense amplifier (21-1) coupled to generate an amplifier output signal (r1(t)) in response to signals capacitively coupled onto the column conductor. WHT-based circuitry (35) determines amounts of signal contribution capacitively coupled by each of the excitation signals, respectively, to the amplifier output signal.
摘要翻译：触摸屏系统包括电容式触摸屏（1），其包括多个行导体（7-1.2 .n）和列导体（5-1）。多个同时正交激励信号（S1（t），S2（t）... Sn（t））分别同时被驱动到行导体上。列导体上的电容耦合信号可能受到电容式触摸屏上的触摸（10）的影响。接收器电路（50）包括响应于电容耦合到列导体上的信号而耦合以产生放大器输出信号（r1（t））的读出放大器（21-1）。基于WHT的电路（35）确定分别通过每个激励信号电容耦合到放大器输出信号的信号贡献量。

54. 发明申请

US20110280261A1 Interleaver Design and Header Structure For ITU G.hnem 有权
标题翻译： ITU G.hnem的交织器设计和标题结构
公开(公告)号：US20110280261A1
公开(公告)日：2011-11-17
申请号：US13101938
申请日：2011-05-05
申请人： Badri N. Varadarajan , Anand Dabak , Il Han Kim
发明人： Badri N. Varadarajan , Anand Dabak , Il Han Kim
IPC分类号： H04J99/00
CPC分类号： H04L27/20 , H04L5/0007 , H04L27/2602 , H04L27/2647
摘要： Embodiments of the invention provide an interleaver design and header fields for ITU-T G.hnem. The header may comprise two parts that are separately encoded. A common header segment is encoded alone, and an embedded header segment is encoded with payload data. The interleaver operates on blocks having a size based upon a total number of input bits in an FEC codeword block, a total number of bits loaded on symbols that span a half mains cycle, or a maximum fragment size of 3072 bits. The blocks may be repeated before interleaving. Each block and its repetitions may be interleaved together, such as for header data, or each block and repetition may be interleaved separately, such as for payload data. Cyclic padding may be used on each block to create an integer number of symbols for transmission.
摘要翻译：本发明的实施例提供了用于ITU-T G.hnem的交织器设计和报头字段。标题可以包括分开编码的两个部分。公共头段被单独编码，并且嵌入的标题段用有效载荷数据进行编码。交织器对具有基于FEC码字块中的输入位的总数的大小的块，对跨越半电源周期的符号上加载的总位数或3072位的最大片段大小进行操作。可以在交织之前重复这些块。每个块及其重复可以交织在一起，诸如用于报头数据，或者每个块和重复可以被单独交织，诸如用于有效载荷数据。可以在每个块上使用循环填充来创建用于传输的整数个符号。

55. 发明申请

US20100272192A1 OFDM-Lite Architecture for HomePlug 有权
标题翻译：用于HomePlug的OFDM-Lite架构
公开(公告)号：US20100272192A1
公开(公告)日：2010-10-28
申请号：US12768676
申请日：2010-04-27
申请人： Badri Varadarajan , Anand Dabak , Shu Du , Il Han Kim
发明人： Badri Varadarajan , Anand Dabak , Shu Du , Il Han Kim
IPC分类号： H04L27/28 , H04L25/00
CPC分类号： H04L27/2613
摘要： A device for communicating digital data over power lines includes a power line interface for transmitting data over at least one band of frequencies. An orthogonal frequency division multiplexing (OFDM) modulation unit generates OFDM symbols using a set of tones for the frequency band. A preamble generation unit generates preamble sequences for the frequency band by using the set of tones used by the OFDM modulation unit. The tones used by the preamble generation unit have a constant magnitude, and a set of phases obtained by quantizing to a small alphabet the phase of a set of tones obtained by taking an IFFT of a portion of a preamble used by a non-interoperable powerline access device. The device may transmit on two or more bands using a sampling frequency clock, wherein a lower band clock frequency is equal to or an integer divisor of a higher band clock frequency.
摘要翻译：用于通过电力线传送数字数据的装置包括用于通过至少一个频带传送数据的电力线接口。正交频分复用（OFDM）调制单元使用用于频带的一组音调来生成OFDM符号。前导码生成单元通过使用由OFDM调制单元使用的音调集合来生成用于频带的前同步码序列。由前置码生成单元使用的音调具有恒定的幅度，以及通过将非可互操作的电力线使用的前置部分的一部分的IFFT获得的一组音调的相位来量化到小的字母而获得的一组相位访问设备该装置可以使用采样频率时钟在两个或更多个频带上进行传输，其中较低频带时钟频率等于或更高频带时钟频率的整数除数。

56. 发明授权

US07113499B2 Wireless communication 有权
标题翻译：无线通信
公开(公告)号：US07113499B2
公开(公告)日：2006-09-26
申请号：US09820152
申请日：2001-03-28
申请人： Mohammed Nafie , Anand Dabak , Timothy M. Schmidl
发明人： Mohammed Nafie , Anand Dabak , Timothy M. Schmidl
IPC分类号： H04J3/24
CPC分类号： H04L1/0026 , H04L1/0001 , H04L1/0015 , H04L1/0034
摘要： A wireless communication transmission channel estimation by initial data exchange to determine calibration factors to apply to tracked channel estimations from received transmissions.
摘要翻译：通过初始数据交换的无线通信传输信道估计，以确定适用于从接收到的传输的跟踪信道估计的校准因子。

57. 发明申请

US20050265490A1 Enhanced channel estimator, method of enhanced channel estimating and an OFDM receiver employing the same 有权
标题翻译：增强信道估计器，增强信道估计方法和采用该方法的OFDM接收机
公开(公告)号：US20050265490A1
公开(公告)日：2005-12-01
申请号：US11136121
申请日：2005-05-24
申请人： Charles Sestok , Anand Dabak , Jaiganesh Balakrishnan
发明人： Charles Sestok , Anand Dabak , Jaiganesh Balakrishnan
IPC分类号： H04L25/02 , H04L27/06 , H04L27/26
CPC分类号： H04L25/0232 , H04L25/0212 , H04L25/022 , H04L27/2647
摘要： The present invention provides an enhanced channel estimator for use with an orthogonal frequency division multiplex (OFDM) receiver employing scattered pilot channel estimates. In one embodiment, the enhanced channel estimator includes a time interpolation estimator configured to provide time-interpolation channel estimates having at least one image for a portion of carriers having the scattered pilot channel estimates. The enhanced channel estimator also includes a frequency interpolation estimator coupled to the time interpolation estimator and configured to provide frequency-interpolation channel estimates for each carrier based on image suppression through balanced-error filtering.
摘要翻译：本发明提供了一种与使用分散导频信道估计的正交频分复用（OFDM）接收机一起使用的增强信道估计器。在一个实施例中，增强信道估计器包括时间插值估计器，其被配置为提供对具有分散导频信道估计的载波的一部分具有至少一个图像的时间插值信道估计。增强信道估计器还包括耦合到时间插值估计器并被配置为基于通过平衡误差滤波的图像抑制来为每个载波提供频率插值信道估计的频率内插估计器。

58. 发明申请

US20050180375A1 System and method for channelization and data multiplexing in a wireless communication network 审中-公开
标题翻译：用于无线通信网络中的信道化和数据复用的系统和方法
公开(公告)号：US20050180375A1
公开(公告)日：2005-08-18
申请号：US11032402
申请日：2005-01-10
申请人： Anuj Batra , Jaiganesh Balakrishnan , Anand Dabak , Nathan Belk , Danielle Griffith
发明人： Anuj Batra , Jaiganesh Balakrishnan , Anand Dabak , Nathan Belk , Danielle Griffith
IPC分类号： H04B1/69 , H04J11/00 , H04J13/00 , H04B7/208
CPC分类号： H04B1/71632 , H04J13/0022
摘要： A system and method for channelization and data multiplexing in ultra-wideband (UWB) wireless communication system is described. The spectrum allocated for UWB in a multi-band OFDM (orthogonal frequency division multiplex) system is subdivided into various bands. A set of time frequency codes (TFC's) is defined, wherein each code specifies one of a plurality of unique band versus time sequences for a particular band group, for sequential data symbols of a given piconet. The separation of data words from multiple devices or multiple simultaneously operating piconets (SOP's) is provided by a combination of FDMA and TFC's. The combination of FDMA and TFC's provides a simplified interface between the MAC and PHY.
摘要翻译：描述了在超宽带（UWB）无线通信系统中的信道化和数据复用的系统和方法。在多频带OFDM（正交频分复用）系统中为UWB分配的频谱被细分成各种频带。定义一组时间频率码（TFC），其中每个码指定给定微微网的顺序数据符号的特定频带组的多个唯一频带对时间序列中的一个。数据字从多个设备或多个同时操作的微微网（SOP）的分离由FDMA和TFC的组合提供。 FDMA和TFC的组合提供了MAC和PHY之间的简化接口。

59. 发明授权

US08831077B2 Communication on a pilot wire 有权
标题翻译：在导线上进行通讯
公开(公告)号：US08831077B2
公开(公告)日：2014-09-09
申请号：US13163513
申请日：2011-06-17
申请人： Badri Varadarajan , Il Han Kim , Anand Dabak , Edward Mullins
发明人： Badri Varadarajan , Il Han Kim , Anand Dabak , Edward Mullins
IPC分类号： H04B1/38 , H04B3/54 , H04L25/49 , H03K7/08
CPC分类号： H03K7/08 , H04B3/54 , H04B2203/5416 , H04L25/4902
摘要： Systems and methods are disclosed for communicating on a pilot wire between Electric Vehicle Service Equipment (EVSE) and an Electric Vehicle (EV). The EVSE and EV exchange a Pulse Width Modulation (PWM) signal on the pilot wire to control charging operations of the EV. Data communications may also be transmitted on the pilot wire, such as between transmit and receive modems. The modems transmit communication signals either continuously, without regard to the state of the PWM signal, or only when the PWM is in an off-state. If transmitting while PWM is on, the modem needs a large coupling impedance and/or a large signal injection. To transmit only when the PWM is off, the modem may use a blocking diode in the coupling circuit or may synchronize to the pulses in the PWM signal.
摘要翻译：公开了用于在电动车辆服务设备（EVSE）和电动车辆（EV）之间的导线上通信的系统和方法。 EVSE和EV在导线上交换脉宽调制（PWM）信号，以控制EV的充电操作。数据通信也可以在导线上传输，例如在发射和接收调制解调器之间。调制解调器连续发送通信信号，而不考虑PWM信号的状态，或仅当PWM处于关闭状态时。如果在PWM打开时发送，则调制解调器需要大的耦合阻抗和/或大的信号注入。仅在PWM关闭时传输，调制解调器可以在耦合电路中使用阻塞二极管，或者可以与PWM信号中的脉冲同步。

60. 发明授权

US08649443B2 OFDM-lite architecture for HomePlug 有权
标题翻译： HomePlug的OFDM-lite架构
公开(公告)号：US08649443B2
公开(公告)日：2014-02-11
申请号：US12768676
申请日：2010-04-27
申请人： Badri Varadarajan , Anand Dabak , Shu Du , Il Han Kim
发明人： Badri Varadarajan , Anand Dabak , Shu Du , Il Han Kim
IPC分类号： H04L25/00
CPC分类号： H04L27/2613
摘要： A device for communicating digital data over power lines includes a power line interface for transmitting data over at least one band of frequencies. An orthogonal frequency division multiplexing (OFDM) modulation unit generates OFDM symbols using a set of tones for the frequency band. A preamble generation unit generates preamble sequences for the frequency band by using the set of tones used by the OFDM modulation unit. The tones used by the preamble generation unit have a constant magnitude, and a set of phases obtained by quantizing to a small alphabet the phase of a set of tones obtained by taking an IFFT of a portion of a preamble used by a non-interoperable powerline access device. The device may transmit on two or more bands using a sampling frequency clock, wherein a lower band clock frequency is equal to or an integer divisor of a higher band clock frequency.
摘要翻译：用于通过电力线传送数字数据的装置包括用于通过至少一个频带传送数据的电力线接口。正交频分复用（OFDM）调制单元使用用于频带的一组音调来生成OFDM符号。前导码生成单元通过使用由OFDM调制单元使用的音调集合来生成用于频带的前同步码序列。由前置码生成单元使用的音调具有恒定的幅度，以及通过将非可互操作的电力线使用的前置部分的一部分的IFFT获得的一组音调的相位来量化到小的字母而获得的一组相位访问设备该装置可以使用采样频率时钟在两个或更多个频带上进行传输，其中较低频带时钟频率等于较高频带时钟频率的整数除数。

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