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71. 发明申请

US20050058216A9 Block level space time transmit diversity in wireless communications 有权
标题翻译：无线通信中的块级空时传输分集
公开(公告)号：US20050058216A9
公开(公告)日：2005-03-17
申请号：US09737070
申请日：2000-12-14
申请人： Mohammed Nafie , Anand Dabak
发明人： Mohammed Nafie , Anand Dabak
IPC分类号： H04B7/06 , H04L1/06 , H04L27/10 , H04L1/02 , H04B7/02 , H04L27/04 , H04L27/12
CPC分类号： H04L27/10 , H04B7/0669 , H04L1/0618
摘要： Space time transmit diversity (9, 14, 17, 19) is applied at the block level to an original block of bits (12) in order to reduce the effects of fading in wireless communication systems that use nonlinear modulation schemes (13, 33). At the receiving end, fading parameters (α1, α2) are estimated (αE1, αE2) and the properties of complex conjugates are utilized (28, 29, 201, 202) to produce a result (r1, r2) that is representative of the original block of bits.
摘要翻译：为了减少使用非线性调制方案（13,33）的无线通信系统中的衰落的影响，在块级将空时发射分集（9,14,17,19）应用于原始的比特位（12）。在接收端，估计衰落参数（α1，α2），并且使用复合共轭物的性质（28,29,201,202）来产生代表该结果的结果（r1，r2）原始块位。

72. 发明授权

US09112753B2 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：US09112753B2
公开(公告)日：2015-08-18
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 , H04L27/20 , H04L27/26 , H04L5/00
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。

73. 发明授权

US08625689B2 Time-domain link adaptation 有权
标题翻译：时域链接适配
公开(公告)号：US08625689B2
公开(公告)日：2014-01-07
申请号：US13179202
申请日：2011-07-08
申请人： Badri Varadarajan , Anand Dabak , Il Han Kim
发明人： Badri Varadarajan , Anand Dabak , Il Han Kim
IPC分类号： H04K1/10
CPC分类号： H04L27/2666 , H04B3/46 , H04B3/54 , H04B2203/5408 , H04B2203/5416 , H04B2203/542 , H04B2203/5425 , H04L1/0002 , H04L1/0019 , H04L5/0003 , H04L27/2607 , H04L27/2671
摘要： Embodiments of the invention provide time-domain link adaptation in power line communications. In one embodiment, the cyclic prefix length and position is adjusted with an OFDM symbol to overlap a periodic impulse noise pulse, thereby allowing the data carried in the symbol to be detected at a receiver. The cyclic prefix may be adjusted to provide a pattern that yields an integer number of OFDM symbols in one zero crossing period. The data rate used for the symbols overlapping the zero-crossing period may be zero or very low. A high data rate may be used for symbols outside the zero-crossing period because those symbols will not be affected by the periodic impulse noise.
摘要翻译：本发明的实施例提供了电力线通信中的时域链路自适应。在一个实施例中，循环前缀长度和位置用OFDM符号调整以与周期性脉冲噪声脉冲重叠，从而允许在接收器处检测符号中携带的数据。可以调整循环前缀以提供在一个零交叉周期中产生整数个OFDM符号的模式。用于与过零周期重叠的符号的数据速率可以为零或非常低。由于这些符号不受周期脉冲噪声的影响，因此高数据速率可用于过零周期以外的符号。

74. 发明授权

US08259598B2 Random access structure for optimal cell coverage 有权
标题翻译：用于最佳细胞覆盖的随机接入结构
公开(公告)号：US08259598B2
公开(公告)日：2012-09-04
申请号：US11833329
申请日：2007-08-03
申请人： Pierre Bertrand , Anand Dabak , Jing Jiang
发明人： Pierre Bertrand , Anand Dabak , Jing Jiang
IPC分类号： G08C15/00
CPC分类号： H04W74/0866 , H04J3/0682 , H04L27/2607
摘要： Apparatus and method for accessing a wireless telecommunications network by transmitting a random access signal. The random access signal includes a cyclic prefix signal and a guard interval. The cyclic prefix signal and the guard interval are adapted to optimize random access channel coverage in a telecommunications cell. The disclosed method for transmitting a random access signal includes transmitting a cyclic prefix signal. The duration of the cyclic prefix signal is approximately the sum of a maximum round trip delay duration of the telecommunications cell and a maximum delay spread duration. The method further includes providing a guard interval. The guard interval duration being approximately the duration of the maximum round trip delay of the telecommunications cell.
摘要翻译：通过发送随机接入信号来接入无线电信网络的装置和方法。随机接入信号包括循环前缀信号和保护间隔。循环前缀信号和保护间隔适于优化电信小区中的随机接入信道覆盖。所公开的用于发送随机接入信号的方法包括发送循环前缀信号。循环前缀信号的持续时间大约是电信小区的最大往返延迟持续时间和最大延迟扩展持续时间之和。该方法还包括提供保护间隔。保护间隔持续时间大约是电信小区最大往返延迟的持续时间。

75. 发明申请

US20120056841A1 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：US20120056841A1
公开(公告)日：2012-03-08
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： G06F3/044
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。

76. 发明申请

US20080069255A1 Efficient Bit Interleaver for A Multi-Band OFDM Ultra-Wideband System 审中-公开
标题翻译：用于多频带OFDM超宽带系统的高效位交织器
公开(公告)号：US20080069255A1
公开(公告)日：2008-03-20
申请号：US11939222
申请日：2007-11-13
申请人： Jaiganesh Balakrishnan , Anuj Batra , Anand Dabak
发明人： Jaiganesh Balakrishnan , Anuj Batra , Anand Dabak
IPC分类号： H04L27/00
CPC分类号： H04L1/0059 , H03M13/2707 , H04B1/7176 , H04B1/719 , H04L1/0068 , H04L1/0071 , H04L5/0007 , H04L5/0042 , H04L5/0044 , H04L5/0083
摘要： An efficient bit interleaving scheme for a multi-band OFDM ultra-wideband (UWB) system. The encoded bits of the multi-band OFDM system are interleaved within each OFDM symbol and across OFDM symbols. The bit interleaving scheme minimizes performance degradation due to groups of contiguous OFDM tones experiencing a poor SNR caused by the frequency selective channel, exploits the frequency diversity across sub-bands, randomizes the effect of co-channel interference from simultaneously operating un-coordinated piconets, and randomizes the impact of generic narrow-band interferers present within the UWB spectrum.
摘要翻译：一种用于多频带OFDM超宽带（UWB）系统的有效位交织方案。多频带OFDM系统的编码比特在每个OFDM符号内和OFDM符号之间进行交织。比特交织方案最小化由于频率选择信道引起的差的SNR的连续OFDM音调组的性能下降，利用子频带上的频率分集，随机化来自同时操作的非协调微微网的同信道干扰的影响，并随机化UWB频谱内存在的通用窄带干扰源的影响。

77. 发明申请

US20060280230A1 Wireless communications system with secondary synchronization code based on values in primary synchronization code 有权
标题翻译：基于主同步码中的值的无线通信系统具有辅同步码
公开(公告)号：US20060280230A1
公开(公告)日：2006-12-14
申请号：US11438149
申请日：2006-05-22
申请人： Anand Dabak , Sundararajan Sriram , Srinath Hosur
发明人： Anand Dabak , Sundararajan Sriram , Srinath Hosur
IPC分类号： H04B1/00
CPC分类号： H04B1/7083 , H04B1/70735 , H04J13/00 , H04J13/12
摘要： A wireless communication system. The system comprises transmitter circuitry (BST1), the transmitter circuitry comprising encoder circuitry (50) for transmitting a plurality of frames (FR). Each of the plurality of frames comprises a primary synchronization code (PCS) and a secondary synchronization code (SSC). The encoder circuitry comprises of circuitry (501) for providing the primary synchronization code in response to a first sequence (32). The encoder circuitry further comprises circuitry (502) for providing the secondary synchronization code in response to a second sequence (54) and a third sequence (56). The second sequence is selected from a plurality of sequences. Each of the plurality of sequences is orthogonal with respect to all other sequences in the plurality of sequences. The third sequence comprises a subset of bits from the first sequence.
摘要翻译：无线通信系统。该系统包括发射机电路（BST1），该发射机电路包括用于传输多个帧（FR）的编码器电路（50）。多个帧中的每一个包括主同步码（PCS）和辅同步码（SSC）。编码器电路包括用于响应于第一序列（32）提供主同步码的电路（50 1）。编码器电路还包括用于响应于第二序列（54）和第三序列（56）提供辅助同步码的电路（50）。第二序列从多个序列中选择。多个序列中的每一个相对于多个序列中的所有其他序列是正交的。第三序列包括来自第一序列的比特的子集。

78. 发明申请

US20050265467A1 Intercarrier interference cancellation algorithm 审中-公开
标题翻译：载波间干扰消除算法
公开(公告)号：US20050265467A1
公开(公告)日：2005-12-01
申请号：US11061977
申请日：2005-02-18
申请人： Anand Dabak , Jaiganesh Balakrishnan , Charles Sestok
发明人： Anand Dabak , Jaiganesh Balakrishnan , Charles Sestok
IPC分类号： H04K1/10 , H04L27/26
CPC分类号： H04L27/2647
摘要： A method comprising wirelessly transmitting and receiving a data signal in an orthogonal frequency division multiplexing (OFDM) system. The method further comprises, in the frequency domain, at least partially removing overlap between a first received subcarrier frequency data and a second received subcarrier frequency data.
摘要翻译：一种在正交频分复用（OFDM）系统中无线发送和接收数据信号的方法。该方法还包括在频域中至少部分地去除第一接收副载波频率数据和第二接收副载波频率数据之间的重叠。

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