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71. 发明授权

US09385843B2 Method and apparatus for using multiple modulation schemes for a single packet 有权
公开(公告)号：US09385843B2
公开(公告)日：2016-07-05
申请号：US11022538
申请日：2004-12-22
申请人： Aamod Khandekar , Avneesh Agrawal
发明人： Aamod Khandekar , Avneesh Agrawal
IPC分类号： H04L27/18 , H04L1/18 , H04L1/00 , H04L1/16
CPC分类号： H04L1/0003 , H04L1/0009 , H04L1/0025 , H04L1/0054 , H04L1/1671 , H04L1/1819 , H04L1/1845 , H04L1/1861 , H04L1/1893 , Y02D50/10
摘要： Techniques for using multiple modulation schemes for a single packet are described. Each data packet is processed and transmitted in up to T blocks, where T>1. Multiple modulation schemes are used for the T blocks to achieve good performance. A transmitter encodes a data packet to generate code bits. The transmitter then forms a block of code bits with the code bits generated for the packet, determines the modulation scheme to use for the block (e.g., based on a mode/rate selected for the packet), maps the code bits for the block based on the modulation scheme to obtain data symbols, and processes and transmits the block of data symbols to a receiver. The transmitter generates and transmits another block in similar manner until the data packet is decoded correctly or all T blocks have been transmitted. The receiver performs the complementary processing to receive and decode the packet.

72. 发明申请

US20070098050A1 Pilot symbol transmission in wireless communication systems 有权
标题翻译：无线通信系统中的导频符号传输
公开(公告)号：US20070098050A1
公开(公告)日：2007-05-03
申请号：US11511735
申请日：2006-08-28
申请人： Aamod Khandekar , Avneesh Agrawal , Dhananjay Gore
发明人： Aamod Khandekar , Avneesh Agrawal , Dhananjay Gore
IPC分类号： H04B1/00 , H04K1/10
CPC分类号： H04J13/102 , H04B1/713 , H04L5/0026 , H04L5/0051 , H04L25/0204 , H04L25/0226 , H04L25/03866
摘要： Pilot symbols transmitted from different sectors of a same base station are multiplied with a same cell specific scrambling code and a first code having low cross correlation and second codes having low cross correlation. The second code is constant over the length of the first code, but may vary for repetitions of the first code.
摘要翻译：从相同基站的不同扇区发送的导频符号与相同的小区特定扰码和具有低互相关的第一码和具有低互相关的第二码相乘。第二个代码在第一个代码的长度上是恒定的，但是对于第一个代码的重复可能会有所不同。

73. 发明申请

US20060209932A1 Channel estimation for single-carrier systems 审中-公开
标题翻译：单载波系统的信道估计
公开(公告)号：US20060209932A1
公开(公告)日：2006-09-21
申请号：US11084629
申请日：2005-03-18
申请人： Aamod Khandekar , Avneesh Agrawal
发明人： Aamod Khandekar , Avneesh Agrawal
IPC分类号： H04B1/707
CPC分类号： H04L25/0212 , H04B1/7115
摘要： Systems and methods are provided for processing path components in a wireless communications network. A communications system is provided that includes one or more path analyzers to determine path magnitudes with respect to a set of channel paths employed in a wireless communications network. Such analysis can include analog or digital signal processing to determine such aspects as peak energy content, phase estimates, or other parameter of a signal path. From the path determinations, one or more threshold components select a subset of the channel paths for communications based in part on the path magnitudes.
摘要翻译：提供了用于在无线通信网络中处理路径组件的系统和方法。提供了一种通信系统，其包括一个或多个路径分析器，用于相对于在无线通信网络中采用的一组信道路径来确定路径幅度。这种分析可以包括模拟或数字信号处理以确定诸如峰值能量含量，相位估计或信号路径的其它参数的方面。从路径确定中，一个或多个阈值分量部分地基于路径幅度来选择用于通信的信道路径的子集。

74. 发明申请

US20060199596A1 Multi-sector broadcast paging channel 失效
公开(公告)号：US20060199596A1
公开(公告)日：2006-09-07
申请号：US11175788
申请日：2005-07-05
申请人： Edward Teauge , Avneesh Agrawal , Aamod Khandekar
发明人： Edward Teauge , Avneesh Agrawal , Aamod Khandekar
IPC分类号： H04Q7/20
CPC分类号： H04B7/0491 , H04W16/24 , H04W68/10
摘要： Systems and methods are described that facilitate improving paging signal strength at or near sector perimeters in a wireless network region by transmitted identical paging waveforms simultaneously from all sectors in the region and permitting over-the-air signal aggregation to combine signal energy near sector perimeters. Waveforms can be modulated using an orthogonal frequency division multiplexing technique and can be simultaneously transmitted according to predefined transmission resources over a multi-sector broadcast paging channel reserved for such identical waveforms. Cyclic prefix can be added to the identical waveforms to mitigate problems associated with delay spread and/or time-of-arrival differences at or near sector perimeters.

75. 发明申请

US20060146760A1 Constrained hopping in wireless communication systems 失效
标题翻译：无线通信系统中的约束跳频
公开(公告)号：US20060146760A1
公开(公告)日：2006-07-06
申请号：US11315744
申请日：2005-12-21
申请人： Aamod Khandekar , Avneesh Agrawal
发明人： Aamod Khandekar , Avneesh Agrawal
IPC分类号： H04J11/00 , H04B7/216
CPC分类号： H04B1/713 , H04B7/02 , H04L1/0029 , H04L5/0023 , H04L5/0039 , H04L5/0044 , H04L5/0048 , H04L5/006 , H04L5/0094 , H04L25/0204 , H04L25/0226 , H04L25/0232
摘要： Embodiments described provide for resource allocation for a transmission to a wireless device. The frequency band is partitioned into at least two contiguous subbands. A determination is made whether it is desirable to transmit in a single subband or in more than one subband. The transmission is assigned to occur in either the single subband or to operate in more than one subband. If the transmission is restricted to one subband, the hop pattern is also restricted to subcarriers within the particular subband.
摘要翻译：所描述的实施例提供了用于向无线设备的传输的资源分配。将频带划分为至少两个连续的子带。确定是否希望在单个子带中或在多于一个子带中进行发送。传输被分配发生在单个子带中或在多个子带中操作。如果传输被限制到一个子带，则跳频模式也被限制在特定子带内的子载波上。

76. 发明授权

US09294218B2 Rate prediction in fractional reuse systems 有权
$Rate prediction in fractional reuse systems$
公开(公告)号：US09294218B2
公开(公告)日：2016-03-22
申请号：US11168904
申请日：2005-06-28
申请人： Aamod Khandekar , Avneesh Agrawal
发明人： Aamod Khandekar , Avneesh Agrawal
IPC分类号： H04W16/02 , H04W16/12 , H04L1/00 , H04L1/20 , H04L5/00 , H04L1/18 , H04L27/26
CPC分类号： H04L1/0015 , H04L1/0002 , H04L1/0006 , H04L1/0009 , H04L1/0026 , H04L1/1812 , H04L1/20 , H04L5/0007 , H04L5/0012 , H04L5/006 , H04L27/2601 , H04W16/02 , H04W16/12
摘要： Apparatus and methods for rate prediction in a wireless communication system having fractional frequency reuse are disclosed. A wireless communication system implementing Orthogonal Frequency Division Multiple Access (OFDMA) can implement a fractional frequency reuse plan where a portion of carriers is allocated for terminals not anticipating handoff and another portion of the carriers is reserved for terminals having a higher probability of handoff. Each of the portions can define a reuse set. The terminals can be constrained to frequency hop within a reuse set. The terminal can also be configured to determine a reuse set based on a present assignment of a subset of carriers. The terminal can determine a channel estimate and a channel quality indicator based in part on at least the present reuse set. The terminal can report the channel quality indicator to a source, which can determine a rate based on the index value.

77. 发明授权

US08543138B2 Multi-sector broadcast paging channel 失效
标题翻译：多扇区广播寻呼信道
公开(公告)号：US08543138B2
公开(公告)日：2013-09-24
申请号：US11175788
申请日：2005-07-05
申请人： Edward Harrison Teauge , Avneesh Agrawal , Aamod Khandekar
发明人： Edward Harrison Teauge , Avneesh Agrawal , Aamod Khandekar
IPC分类号： H04W68/00
CPC分类号： H04B7/0491 , H04W16/24 , H04W68/10
摘要： Systems and methods are described that facilitate improving paging signal strength at or near sector perimeters in a wireless network region by transmitted identical paging waveforms simultaneously from all sectors in the region and permitting over-the-air signal aggregation to combine signal energy near sector perimeters. Waveforms can be modulated using an orthogonal frequency division multiplexing technique and can be simultaneously transmitted according to predefined transmission resources over a multi-sector broadcast paging channel reserved for such identical waveforms. Cyclic prefix can be added to the identical waveforms to mitigate problems associated with delay spread and/or time-of-arrival differences at or near sector perimeters.
摘要翻译：描述了系统和方法，其有助于通过从该区域中的所有扇区同时发送的相同寻呼波形来改善无线网络区域中或其附近的寻呼信号强度，并允许空中信号聚合以组合扇区周边附近的信号能量。可以使用正交频分复用技术来调制波形，并且可以通过为这样相同的波形保留的多扇区广播寻呼信道根据预定义的传输资源同时发送波形。循环前缀可以添加到相同的波形中，以减轻与扇区边缘处或附近的延迟扩展和/或到达时间差异相关的问题。

78. 发明授权

US07421041B2 Iterative channel and interference estimation and decoding 有权
标题翻译：迭代通道和干扰估计与解码
公开(公告)号：US07421041B2
公开(公告)日：2008-09-02
申请号：US10791342
申请日：2004-03-01
申请人： Aamod Khandekar , Avneesh Agrawal , Fuyun Ling
发明人： Aamod Khandekar , Avneesh Agrawal , Fuyun Ling
IPC分类号： H03K9/00
CPC分类号： H04L1/005 , H04L1/0071 , H04L25/0238 , H04L25/03171
摘要： For an iterative channel and interference estimation and decoding scheme, prior information for channel gain and interference is initially obtained based on received pilot symbols. Forward information for code bits corresponding to received data symbols is derived based on the received data symbols and the prior information and then decoded to obtain feedback information for the code bits corresponding to the received data symbols. A posteriori information for channel gain and interference for each received data symbol is derived based on the feedback information for that received data symbol. The a posteriori information for the received data symbols and the prior information are combined to obtain updated information for channel gain and interference for each received data symbol. The process can be repeated for any number of iterations. The prior, a posteriori, and updated information may be represented by joint probability distributions on channel gain and interference. The forward and feedback information may be represented by log-likelihood ratios.
摘要翻译：对于迭代信道和干扰估计和解码方案，首先基于接收到的导频符号获得用于信道增益和干扰的先验信息。基于接收到的数据符号和先验信息导出与接收到的数据符号相对应的码位的转发信息，然后解码以获得与接收的数据符号对应的码位的反馈信息。基于该接收到的数据符号的反馈信息导出每个接收到的数据符号的信道增益和干扰的后验信息。组合接收到的数据符号和先验信息的后验信息以获得每个接收到的数据符号的信道增益和干扰的更新信息。该过程可以重复任意次数的迭代。先前的，后验的和更新的信息可以由通道增益和干扰的联合概率分布来表示。正向和反馈信息可以由对数似然比表示。

79. 发明申请

US20060039273A1 Unified pulse shaping for multi-carrier and single-carrier waveforms 有权
公开(公告)号：US20060039273A1
公开(公告)日：2006-02-23
申请号：US11022537
申请日：2004-12-22
申请人： Dhananjay Gore , Avneesh Agrawal , Aamod Khandekar
发明人： Dhananjay Gore , Avneesh Agrawal , Aamod Khandekar
IPC分类号： H04J11/00
CPC分类号： H04L5/0048 , H04L5/0007 , H04L5/0044 , H04L25/03834 , H04L27/0008 , H04L27/2607 , H04L27/2626 , H04L27/2647
摘要： To transmit a multi-carrier signal, a transmitter provides zero symbols for guard subbands, performs OFDM modulation, and filters the resultant time-domain samples with a pulse shaping filter. To transmit a single-carrier signal, the transmitter partitions the single-carrier signal into segments. Each segment contains up to K samples and is padded, if needed, to the length of an OFDM symbol. Each padded segment is transformed from the time domain to the frequency domain to generate a corresponding frequency-domain segment with K symbols. For each frequency-domain segment, the symbols corresponding to the guard subbands are set to zero. Each frequency-domain segment is then transformed from the frequency domain to the time domain to generate a corresponding time-domain segment. A cyclic prefix may or may not be appended to each time-domain segment. Each time-domain segment is filtered with the same pulse shaping filter to generate an output waveform for the single-carrier signal.

80. 发明申请

US20060014542A1 Rate prediction in fractional reuse systems 有权
$Rate prediction in fractional reuse systems$
标题翻译：分数复用系统中的速率预测
公开(公告)号：US20060014542A1
公开(公告)日：2006-01-19
申请号：US11168904
申请日：2005-06-28
申请人： Aamod Khandekar , Avneesh Agrawal
发明人： Aamod Khandekar , Avneesh Agrawal
IPC分类号： H04Q7/20
CPC分类号： H04L1/0015 , H04L1/0002 , H04L1/0006 , H04L1/0009 , H04L1/0026 , H04L1/1812 , H04L1/20 , H04L5/0007 , H04L5/0012 , H04L5/006 , H04L27/2601 , H04W16/02 , H04W16/12
摘要： Apparatus and methods for rate prediction in a wireless communication system having fractional frequency reuse are disclosed. A wireless communication system implementing Orthogonal Frequency Division Multiple Access (OFDMA) can implement a fractional frequency reuse plan where a portion of carriers is allocated for terminals not anticipating handoff and another portion of the carriers is reserved for terminals having a higher probability of handoff. Each of the portions can define a reuse set. The terminals can be constrained to frequency hop within a reuse set. The terminal can also be configured to determine a reuse set based on a present assignment of a subset of carriers. The terminal can determine a channel estimate and a channel quality indicator based in part on at least the present reuse set. The terminal can report the channel quality indicator to a source, which can determine a rate based on the index value.
摘要翻译：公开了具有分数次频率重用的无线通信系统中的速率预测装置和方法。实现正交频分多址（OFDMA）的无线通信系统可以实现分数频率复用计划，其中一部分载波被分配给不预期切换的终端，另一部分载波被保留用于具有较高切换概率的终端。每个部分可以定义重用集合。终端可以被限制在重用集合内的跳频。终端还可以被配置为基于载波子集的当前分配来确定重用集合。所述终端可以部分地至少基于所述重用集合来确定信道估计和信道质量指示符。终端可以将信道质量指示符报告给源，可以根据索引值确定速率。

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