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11. 发明授权

US08566676B2 FEC code and code rate selection based on packet size 有权
标题翻译：基于分组大小的FEC码和码率选择
公开(公告)号：US08566676B2
公开(公告)日：2013-10-22
申请号：US11943172
申请日：2007-11-20
申请人： Ravi Palanki , Jeremy H. Lin , Aamod Khandekar , Alexei Gorokhov , Avneesh Agrawal
发明人： Ravi Palanki , Jeremy H. Lin , Aamod Khandekar , Alexei Gorokhov , Avneesh Agrawal
IPC分类号： H03M13/00
CPC分类号： H04L1/0007 , H04L1/0009 , H04L1/0021 , H04L1/0042 , H04L1/1812 , H04L1/1822
摘要： Techniques for encoding and decoding data are described. In an aspect, multiple code rates for a forward error correction (FEC) code may be supported, and a suitable code rate may be selected based on packet size. A transmitter may obtain at least one threshold to use for code rate selection, determine a packet size to use for data transmission, and select a code rate from among the multiple code rates based on the packet size and the at least one threshold. In another aspect, multiple FEC codes of different types (e.g., Turbo, LDPC, and convolutional codes) may be supported, and a suitable FEC code may be selected based on packet size. The transmitter may obtain at least one threshold to use for FEC code selection and may select an FEC code from among the multiple FEC codes based on the packet size and the at least one threshold.
摘要翻译：描述用于编码和解码数据的技术。在一方面，可以支持用于前向纠错（FEC）码的多个码率，并且可以基于分组大小来选择合适的码率。发射机可以获得用于码率选择的至少一个阈值，确定用于数据传输的分组大小，并且基于分组大小和至少一个阈值从多个码率中选择码率。在另一方面，可以支持不同类型的多个FEC码（例如，Turbo，LDPC和卷积码），并且可以基于分组大小来选择合适的FEC码。发射机可以获得用于FEC码选择的至少一个阈值，并且可以基于分组大小和至少一个阈值从多个FEC码中选择FEC码。

12. 发明授权

US08320407B2 Mapping of subpackets to resources in a communication system 有权
标题翻译：将子分组映射到通信系统中的资源
公开(公告)号：US08320407B2
公开(公告)日：2012-11-27
申请号：US11968631
申请日：2008-01-02
申请人： Ravi Palanki , Jeremy H. Lin , Aamod Khandekar , Alexei Gorokhov , Avneesh Agrawal
发明人： Ravi Palanki , Jeremy H. Lin , Aamod Khandekar , Alexei Gorokhov , Avneesh Agrawal
IPC分类号： H04J4/00
CPC分类号： H04L47/15 , H04L47/70
摘要： Techniques for transmitting data in a communication system are described. A packet may be partitioned into multiple subpackets, and each subpacket may be encoded separately. The subpackets may be mapped to resources assigned for transmission of the packet, with at least one subpacket being mapped to a subset of the assigned resources. The assigned resources may include multiple tiles, with each tile corresponding to a block of time frequency resources. The subpackets may be mapped to the tiles such that (i) the subpackets are mapped to equal number of tiles to achieve similar decoding performance, (ii) each subpacket is mapped to at least NMIN tiles, if available, to achieve a certain minimum diversity order for the subpacket, and/or (iii) each subpacket is mapped to a subset of the multiple tiles, if possible, so that the subpacket can be decoded without having to demodulate all of the tiles.
摘要翻译：描述在通信系统中传输数据的技术。分组可以被划分成多个子分组，并且每个子分组可以被分开编码。子分组可以被映射到分配用于分组的传输的资源，其中至少一个子分组被映射到所分配的资源的子集。分配的资源可以包括多个瓦片，其中每个瓦片对应于时间频率资源块。子分组可以被映射到瓦片，使得（i）子分组被映射到相等数量的分块以实现类似的解码性能，（ii）每个子分组被映射到至少NMIN分块（如果可用），以获得一定的最小分集如果可能，每个子分组被映射到多个分块的子集，使得子分组可以被解码而不必解调所有的分块。

13. 发明申请

US20120188994A1 PILOT TRANSMISSION AND CHANNEL ESTIMATION FOR A COMMUNICATION SYSTEM UTILIZING FREQUENCY DIVISION MULTIPLEXING 有权
标题翻译：用于通信系统的导频传输和信道估计使用频分多路复用
公开(公告)号：US20120188994A1
公开(公告)日：2012-07-26
申请号：US13366727
申请日：2012-02-06
申请人： Ravi Palanki , Aamod Khandekar
发明人： Ravi Palanki , Aamod Khandekar
IPC分类号： H04B1/715 , H04W24/00
CPC分类号： H04B1/69 , H04L5/0007 , H04L5/0048 , H04L25/0212 , H04L25/022 , H04L25/023 , H04L25/025 , H04L27/2613 , H04L2025/03624
摘要： A receiver for receiving a pilot generated based on a polyphase sequence having a constant time-domain envelope and a flat frequency spectrum is disclosed. In one design, the receiver includes at least one demodulator and at least one processor. The demodulator(s) receive at least one single-carrier frequency division multiple access (SC-FDMA) symbol transmitted via a communication channel and including pilot symbols generated based on a polyphase sequence. The demodulator(s) remove a cyclic prefix in each SC-FDMA symbol and demodulate the at least one SC-FDMA symbol to obtain received pilot symbols. The processor(s) derive a channel estimate for the communication channel based on the received pilot symbols.
摘要翻译：公开了一种用于接收基于具有恒定时域包络和平坦频谱的多相序列产生的导频的接收机。在一种设计中，接收机包括至少一个解调器和至少一个处理器。解调器接收经由通信信道发送并包括基于多相序列生成的导频符号的至少一个单载波频分多址（SC-FDMA）符号。解调器在每个SC-FDMA符号中去除循环前缀，并解调至少一个SC-FDMA符号以获得接收到的导频符号。处理器基于接收到的导频符号导出通信信道的信道估计。

14. 发明授权

US08159928B2 Signal transmission in a wireless communication system 有权
标题翻译：无线通信系统中的信号传输
公开(公告)号：US08159928B2
公开(公告)日：2012-04-17
申请号：US11864644
申请日：2007-09-28
申请人： Alexei Gorokhov , Aamod Khandekar , Ravi Palanki
发明人： Alexei Gorokhov , Aamod Khandekar , Ravi Palanki
IPC分类号： H04J11/00
CPC分类号： H04L5/0007 , H04L5/0026 , H04L5/0053 , H04L5/0073 , H04L25/0228 , H04L25/03305 , H04W24/00 , H04W48/08 , H04W52/24 , H04W52/243 , H04W52/247 , H04W52/281 , H04W52/343 , H04W52/56 , H04W52/58
摘要： Interference management is provided through use of a user-based interference control and/or a network-based interference control. For user-based interference control, the terminals are informed of the inter-sector interference observed by the neighbor sectors and can adjust their transmit powers accordingly so that the inter-sector interference is maintained within acceptable levels. For network-based interference control, each sector is informed of the inter-sector interference observed by the neighbor sectors and regulates data transmissions for its terminals such that the inter-sector interference is maintained within acceptable levels. Each system may utilize only user-based interference control, or only network-based interference control, or both.
摘要翻译：通过使用基于用户的干扰控制和/或基于网络的干扰控制来提供干扰管理。对于基于用户的干扰控制，向终端通知相邻扇区观测到的扇区间干扰，并且可以相应地调整它们的发射功率，使得扇区间干扰保持在可接受的水平内。对于基于网络的干扰控制，每个扇区被通知相邻扇区观测到的扇区间干扰，并调节其终端的数据传输，使得扇区间干扰保持在可接受的水平内。每个系统可以仅利用基于用户的干扰控制，或仅使用基于网络的干扰控制，或两者。

15. 发明授权

US08135088B2 Pilot transmission and channel estimation for a communication system utilizing frequency division multiplexing 有权
标题翻译：利用频分复用的通信系统的导频传输和信道估计
公开(公告)号：US08135088B2
公开(公告)日：2012-03-13
申请号：US11175607
申请日：2005-07-05
申请人： Ravi Palanki , Aamod Khandekar
发明人： Ravi Palanki , Aamod Khandekar
IPC分类号： H04L27/00
CPC分类号： H04B1/69 , H04L5/0007 , H04L5/0048 , H04L25/0212 , H04L25/022 , H04L25/023 , H04L25/025 , H04L27/2613 , H04L2025/03624
摘要： A transmitter generates a pilot having a constant time-domain envelope and a flat frequency spectrum based on a polyphase sequence. To generate a pilot IFDMA symbol, a first sequence of pilot symbols is formed based on the polyphase sequence and replicated multiple times to obtain a second sequence of pilot symbols. A phase ramp is applied to the second pilot symbol sequence to obtain a third sequence of output symbols. A cyclic prefix is appended to the third sequence of output symbols to obtain an IFDMA symbol, which is transmitted in the time domain via a communication channel. The pilot symbols may be multiplexed with data symbols using TDM and/or CDM. A pilot LFDMA symbol may also be generated with a polyphase sequence and multiplexed using TDM or CDM. A receiver derives a channel estimate based on received pilot symbols and using minimum mean-square error, least-squares, or some other channel estimation technique.
摘要翻译：发射机产生具有恒定时域包络和基于多相序列的平坦频谱的导频。为了产生导频IFDMA符号，基于多相序列形成第一导频符号序列并多次复制以获得导频符号的第二序列。将相位斜坡施加到第二导频符号序列以获得第三输出符号序列。循环前缀被附加到第三输出符号序列以获得经由通信信道在时域中发送的IFDMA符号。可以使用TDM和/或CDM将导频符号与数据符号复用。也可以使用多相序列生成导频LFDMA符号，并使用TDM或CDM进行复用。接收机基于接收到的导频符号并使用最小均方误差，最小二乘法或一些其它信道估计技术来导出信道估计。

16. 发明授权

US08077692B2 Enhanced frequency division multiple access for wireless communication 有权
标题翻译：用于无线通信的增强型频分多址
公开(公告)号：US08077692B2
公开(公告)日：2011-12-13
申请号：US11431970
申请日：2006-05-10
申请人： Aamod Khandekar , Ravi Palanki
发明人： Aamod Khandekar , Ravi Palanki
IPC分类号： H04L12/56
CPC分类号： H04L27/2618 , H04L5/0007 , H04L5/0039 , H04L5/0041 , H04L5/0046 , H04L25/0228 , H04L25/03159
摘要： Enhanced frequency division multiple access (EFDMA) is a multiplexing scheme that sends modulation symbols in the time domain and achieves a lower PAPR than OFDM. An EFDMA symbol occupies multiple subband groups that are spaced apart in a frequency band, with each subband group containing multiple adjacent subbands. To generate an EFDMA symbol, multiple modulation symbols are mapped onto a first sequence of symbols. A transform (e.g., a DFT) is performed on the first sequence to obtain a second sequence of values. The values in the second sequence corresponding to the subbands used for the EFDMA symbol are retained, and the remaining values are zeroed out to obtain a third sequence of values. An inverse transform (e.g., an IDFT) is performed on the third sequence to obtain a fourth sequence of samples. A phase ramp may be applied on the fourth sequence, and a cyclic prefix is appended to form the EFDMA symbol.
摘要翻译：增强型频分多址（EFDMA）是在时域中发送调制符号并实现比OFDM更低的PAPR的复用方式。 EFDMA符号占据在频带中间隔开的多个子带组，每个子带组包含多个相邻子带。为了产生EFDMA符号，将多个调制符号映射到第一符号序列上。对第一序列执行变换（例如，DFT）以获得第二值序列。对应于用于EFDMA符号的子带的第二序列中的值被保留，并且剩余的值被清零以获得第三值序列。对第三序列执行逆变换（例如，IDFT）以获得第四序列。可以在第四序列上施加相位斜坡，并且附加循环前缀以形成EFDMA符号。

17. 发明授权

US07974362B2 Method and apparatus for generating a permutation for reverse link hopping in wireless communication system 有权
标题翻译：用于在无线通信系统中产生用于反向链路跳变的置换的方法和装置
公开(公告)号：US07974362B2
公开(公告)日：2011-07-05
申请号：US12091432
申请日：2006-10-27
申请人： Ravi Palanki , Aamod Khandekar
发明人： Ravi Palanki , Aamod Khandekar
IPC分类号： H04L27/00
CPC分类号： H04L5/0041 , H03M13/2725 , H03M13/276 , H03M13/2789 , H03M13/2957 , H04B1/7143 , H04J13/00 , H04L1/0003 , H04L1/0026 , H04L1/0625 , H04L5/0007 , H04L5/0026 , H04L5/005 , H04L25/0228 , H04L27/2602 , H04W52/54
摘要： A method and apparatus for generating a permutation for reverse link hopping is provided, comprising initializing permutation constants, determining a value for p such that i
摘要翻译：提供一种用于产生用于反向链路跳变的置换的方法和装置，包括初始化置换常数，确定p的值使得i <2p其中i是第一计数器的值，将第二计数器j初始化为“0” 将x设置为i + 1，其中x是阵列A的元素的索引，对伪噪声（PN）寄存器进行n次计时，以产生伪随机数，将x设置为p，伪随机数的最低有效位（LSB），递增确定j是否等于3或x小于或等于i，确定x是否大于i，将x设置为等于x-i，交换阵列A中的第i个和第x个元素，递减计数器 i乘1，并且基于所生成的跳转排列将一组跳转端口映射到一组子载波。

18. 发明申请

US20110064121A1 METHODS AND APPARATUS FOR FLEXIBLE HOPPING IN A MULTIPLE-ACCESS COMMUNICATION NETWORK 有权
公开(公告)号：US20110064121A1
公开(公告)日：2011-03-17
申请号：US12947547
申请日：2010-11-16
申请人： Ravi Palanki , Aamod Khandekar
发明人： Ravi Palanki , Aamod Khandekar
IPC分类号： H04B1/707
CPC分类号： H04L5/0007 , H04B1/7143 , H04L5/0021 , H04L5/0048 , H04L9/0625 , H04L2209/08 , H04L2209/80
摘要： Techniques for efficiently designing random hopping patterns in a communications system are disclosed. The disclosed embodiments provide for methods and systems for generating random hopping patterns, updating the patterns frequently, generating different patterns for different cells/sectors, and generating patterns of nearby sub-carriers for block hopping.

19. 发明申请

US20100151873A1 DYNAMIC CONTROL BLANKING IN HETEROGENEOUS NETWORKS 有权
标题翻译：异构网络中的动态控制空白
公开(公告)号：US20100151873A1
公开(公告)日：2010-06-17
申请号：US12484624
申请日：2009-06-15
申请人： Alexei Y. Gorokhov , Ravi Palanki , Aamod Khandekar
发明人： Alexei Y. Gorokhov , Ravi Palanki , Aamod Khandekar
IPC分类号： H04W72/04
CPC分类号： H04W72/042 , H04W16/14 , H04W72/0426 , H04W72/082
摘要： Systems and methodologies are described that facilitate requesting blanking over control resources from one or more interfering eNBs or devices. An eNB, such as a macrocell, femtocell or picocell eNB, can transmit a downlink control blanking message to a UE directing the UE to perform blanking (e.g., for uplink control resources) or request the blanking from the interfering eNBs or devices (e.g., for downlink control resources). The downlink control blanking message can specify the desired control resources and/or information to determine the control resources. Thus, dynamic control blanking is provided such that blanking is requested to mitigate interference over control resources for the small scale eNB. The small scale eNB can subsequently communicate control data to the UE over the control resources; the control data can include a resource blanking message that similarly directs the UE to request blanking of general data resource from the interfering eNBs or devices.
摘要翻译：描述了有助于从一个或多个干扰eNB或设备请求对控制资源进行置空的系统和方法。诸如宏小区，毫微微小区或微微小区eNB的eNB可以向指示UE执行消隐（例如，对于上行链路控制资源）或从干扰eNB或设备请求消隐的UE发送下行链路控制置空消息（例如，用于下行链路控制资源）。下行链路控制消隐消息可以指定期望的控制资源和/或信息来确定控制资源。因此，提供动态控制消隐，使得消隐被请求以减轻针对小规模eNB的控制资源的干扰。小规模eNB随后可以通过控制资源向UE发送控制数据; 控制数据可以包括资源消隐消息，其类似地指示UE请求来自干扰eNB或设备的通用数据资源的消隐。

20. 发明申请

US20100046584A1 METHOD AND APPARATUS FOR GENERATING A PERMUTATION FOR FORWARD LINK HOPPING IN WIRELESS COMMUNICATION SYSTEM 有权
标题翻译：用于生成无线通信系统中前向链路失败的方法和装置
公开(公告)号：US20100046584A1
公开(公告)日：2010-02-25
申请号：US12091681
申请日：2006-10-27
申请人： Ravi Palanki , Aamod Khandekar
发明人： Ravi Palanki , Aamod Khandekar
IPC分类号： H04B1/713
CPC分类号： H04L5/0041 , H03M13/2725 , H03M13/276 , H03M13/2789 , H03M13/2957 , H04B1/7143 , H04J13/00 , H04L1/0003 , H04L1/0026 , H04L1/0625 , H04L5/0007 , H04L5/0026 , H04L5/005 , H04L25/0228 , H04L27/2602 , H04W52/54
摘要： A method and apparatus for generating a permutation for forward link hopping is provided, comprising initializing permutation constants, determining a value for p such that i is less than 2p wherein i is a first counter, initializing a second counter j to ‘0’, setting x to i+1 wherein x is index of elements of an array A, clocking a Pseudo-noise (PN) register n times to generate a pseudorandom number, setting x to p Least Significant Bits (LSB) of the pseudorandom number, incrementing j by 1, determining if x is greater than i, setting x equal to x−i, if x is greater than i, swapping the ith and xth element in the array A, decrementing counter i by 1, and mapping a set of hop-ports to a set of sub-carriers based upon the generated hop-permutation.
摘要翻译：提供一种用于产生用于前向链路跳变的置换的方法和装置，包括初始化置换常数，确定p的值使得i小于2p，其中i是第一计数器，将第二计数器j初始化为“0” x到i + 1其中x是阵列A的元素的索引，对伪噪声（PN）寄存器进行n次计时以产生伪随机数，将x设置为p的最小有效位（LSB），递增j 通过1，确定x是否大于i，将x设置为x-i，如果x大于i，则将阵列A中的第i和第x个元素进行交换，将计数器i递减1，并将一组hop- 端口到基于所生成的跳位排列的一组子载波。

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