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1. 发明授权

US09419676B2 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：US09419676B2
公开(公告)日：2016-08-16
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： H04B1/69 , H04L27/26 , H04L5/00 , H04L25/02 , H04L25/03
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。

2. 发明申请

US20160149659A1 Transmission and detection of overhead channels and signals in a wireless network 审中-公开
公开(公告)号：US20160149659A1
公开(公告)日：2016-05-26
申请号：US15011088
申请日：2016-01-29
申请人： Ravi Palanki , Aamod Khandekar , Naga Bhushan
发明人： Ravi Palanki , Aamod Khandekar , Naga Bhushan
IPC分类号： H04J11/00 , H04W72/08 , H04L5/00
CPC分类号： H04J11/005 , H04B1/7107 , H04B2201/70702 , H04J11/004 , H04J11/0069 , H04L5/0048 , H04L5/0053 , H04W24/00 , H04W48/08 , H04W72/082
摘要： Techniques for transmitting and detecting for overhead channels and signals in a wireless network are described. In an aspect, a base station may blank (i.e., not transmit) at least one overhead transmission on certain resources in order to detect for the at least one overhead transmission of another base station. In one design, the base station may (i) send the overhead transmission(s) on a first subset of designated resources and (ii) blank the overhead transmission(s) on a second subset of the designated resources. The designated resources may be resources on which the overhead transmission(s) are sent by macro base stations. The base station may detect for the overhead transmission(s) from at least one other base station on the second subset of the designated resources. In another aspect, the base station may transmit the overhead transmission(s) on additional resources different from the designated resources.

3. 发明授权

US09326253B2 Wireless communication channel blanking 有权
标题翻译：无线通信信道消隐
公开(公告)号：US09326253B2
公开(公告)日：2016-04-26
申请号：US12163835
申请日：2008-06-27
申请人： Naga Bhushan , Aamod Khandekar , Ravi Palanki
发明人： Naga Bhushan , Aamod Khandekar , Ravi Palanki
IPC分类号： H04W52/00 , H04W52/24 , H04W52/32 , H04W52/44 , H04W52/38
CPC分类号： H04W52/243 , H04W52/325 , H04W52/38 , H04W52/44
摘要： Systems and methodologies are described that facilitate blanking on portions of bandwidth utilized by communicating devices that are dominantly interfered by a disparate device in wireless communications networks. The portions of bandwidth can relate to critical data, such as control data, and one or more of the communicating devices can request that the dominantly interfering device blank on one or more of the portions. The communicating devices can subsequently transmit data over the blanked portions free of the dominant interference. Additionally, the dominantly interfering device can request reciprocal blanking from the one or more communicating devices.
摘要翻译：描述了系统和方法，其有助于消除由无线通信网络中的不同设备主要干扰的通信设备所使用的带宽部分的消隐。带宽的部分可以与诸如控制数据的关键数据相关联，并且一个或多个通信设备可以请求在一个或多个部分上的主要干扰设备空白。通信设备可以随后在没有主导干扰的消隐部分上发送数据。此外，主要干扰装置可以从一个或多个通信装置请求相互消隐。

4. 发明授权

US08730877B2 Pilot and data transmission in a quasi-orthogonal single-carrier frequency division multiple access system 有权
标题翻译：准正交单载波分频多址系统中的导频和数据传输
公开(公告)号：US08730877B2
公开(公告)日：2014-05-20
申请号：US11242115
申请日：2005-09-30
申请人： Ravi Palanki , Aamod Khandekar , Arak Sutivong
发明人： Ravi Palanki , Aamod Khandekar , Arak Sutivong
IPC分类号： H04W4/00
CPC分类号： H04B7/04 , H04L1/1819 , H04L5/0023 , H04L5/0048 , H04L25/0206 , H04L25/022 , H04L25/0226 , H04L25/0228 , H04L25/0256
摘要： In a single-carrier frequency division multiple access (SC-FDMA) system that utilizes interleaved FDMA (IFDMA) or localized FDMA, multiple transmitters may transmit their pilots using time division multiplexing (TDM), code division multiplexing (CDM), interleaved frequency division multiplexing (IFDM), or localized frequency division multiplexing (LFDM). The pilots from these transmitters are then orthogonal to one another. A receiver performs the complementary demultiplexing for the pilots sent by the transmitters. The receiver may derive a channel estimate for each transmitter using an MMSE technique or a least-squares technique. The receiver may receive overlapping data transmissions sent on the same time-frequency block by the multiple transmitters and may perform receiver spatial processing with spatial filter matrices to separate these data transmissions. The receiver may derive the spatial filter matrices based on the channel estimates for the transmitters and using zero-forcing, MMSE, or maximal ratio combining technique.
摘要翻译：在采用交织FDMA（IFDMA）或集中式FDMA的单载波频分多址（SC-FDMA）系统中，多个发射机可以使用时分多路复用（TDM），码分多路复用（CDM），交错分频复用（IFDM）或局部频分复用（LFDM）。来自这些发射机的飞行员然后彼此正交。接收机对由发射机发送的导频进行互补解复用。接收机可以使用MMSE技术或最小二乘法来为每个发射机导出信道估计。接收机可以接收由多个发射机在相同时间频率块上发送的重叠数据传输，并且可以利用空间滤波器矩阵来执行接收机空间处理以分离这些数据传输。接收机可以基于发射机的信道估计和使用零强制，MMSE或最大比组合技术导出空间滤波器矩阵。

5. 发明授权

US08681749B2 Control resource mapping for a wireless communication system 有权
标题翻译：控制无线通信系统的资源映射
公开(公告)号：US08681749B2
公开(公告)日：2014-03-25
申请号：US11968642
申请日：2008-01-02
申请人： Aamod Khandekar , Alexei Gorokhov , Naga Bhushan , Sandip Sarkar , Ravi Palanki
发明人： Aamod Khandekar , Alexei Gorokhov , Naga Bhushan , Sandip Sarkar , Ravi Palanki
IPC分类号： H04B7/216 , H04W72/04 , H04B1/713 , H04W72/08 , H04L5/00 , H04B7/26
CPC分类号： H04W72/04 , H04B1/713 , H04B7/2621 , H04L1/1692 , H04L5/0053 , H04W52/146 , H04W52/16 , H04W52/243 , H04W52/247 , H04W52/362 , H04W52/60 , H04W72/08
摘要： Techniques for sending control information in a wireless communication system are described. A control segment may include L≧1 tiles, and each tile may include a number of transmission units. A number of control resources may be defined and mapped to the transmission units for the control segment. For symmetric mapping, multiple sets of S≧1 control resources may be formed, and each batch of L consecutive sets of S control resources may be mapped to S transmission units at the same location in the L tiles. For localized mapping, S>1, and each set of S control resources may be mapped to a cluster of S adjacent transmission units in one tile. For distributed mapping, S=1, and each control resource may be mapped to one transmission unit in one tile. For diversity, each control resource may be mapped to multiple (e.g., three) transmission units in at least one tile.
摘要翻译：描述用于在无线通信系统中发送控制信息的技术。控制段可以包括L≥1瓦片，并且每个瓦片可以包括多个传输单元。可以将多个控制资源定义并映射到控制段的传输单元。对于对称映射，可以形成多组S≥1个控制资源，并且每L批连续的S个控制资源组可以被映射到L个瓦片中相同位置处的S个传输单元。对于局部映射，S> 1，并且每组S个控制资源可以被映射到一个瓦片中的S个相邻传输单元的簇。对于分布式映射，S = 1，并且每个控制资源可以映射到一个瓦片中的一个传输单元。对于分集，每个控制资源可以映射到至少一个瓦片中的多个（例如，三个）传输单元。

6. 发明授权

US08457260B2 System and method for acquisition in wireless communication systems 有权
标题翻译：无线通信系统采集系统及方法
公开(公告)号：US08457260B2
公开(公告)日：2013-06-04
申请号：US11944866
申请日：2007-11-26
申请人： Aamod Khandekar , Alexei Gorokhov , Naga Bhushan , Ravi Palanki
发明人： Aamod Khandekar , Alexei Gorokhov , Naga Bhushan , Ravi Palanki
IPC分类号： H04L27/08
CPC分类号： H04L27/3809 , H04L27/2647 , H04W52/52 , H04W68/02
摘要： Techniques for supporting efficient operation by terminals in a wireless communication system are described. A base station transmits a preamble periodically in each superframe. The preamble includes at least one first OFDM symbol for control information followed by at least one second OFDM symbol for paging information. A terminal receives the first and second OFDM symbols and determines a receiver gain based on the received power of the first OFDM symbol(s), e.g., with an AGC loop having a shorter time constant than the duration of the first OFDM symbol(s). The terminal processes the second OFDM symbol(s) based on the receiver gain to obtain the paging information. The terminal may operate in an idle state, determine superframes assigned to the terminal, sleep between the assigned superframes, and process the first and second OFDM symbols in each assigned superframe to obtain the paging information.
摘要翻译：描述了用于支持无线通信系统中的终端的有效操作的技术。基站在每个超帧中周期性地发送前导码。前导码包括用于控制信息的至少一个第一OFDM符号，随后是用于寻呼信息的至少一个第二OFDM符号。终端接收第一和第二OFDM符号，并且基于第一OFDM符号的接收功率确定接收机增益，例如，具有比第一OFDM符号的持续时间更短的时间常数的AGC环路，。终端基于接收机增益处理第二OFDM符号以获得寻呼信息。终端可以在空闲状态下操作，确定分配给终端的超帧，在分配的超帧之间休眠，并处理每个分配的超帧中的第一和第二OFDM符号以获得寻呼信息。

7. 发明授权

US08098711B2 Methods and apparatus for flexible hopping in a multiple-access communication network 有权
公开(公告)号：US08098711B2
公开(公告)日：2012-01-17
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： H04B1/00
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.

8. 发明授权

US07974355B2 Method and apparatus for generating a permutation for forwarding link hopping in wireless communication system 有权
标题翻译：用于在无线通信系统中生成用于转发链路跳变的置换的方法和装置
公开(公告)号：US07974355B2
公开(公告)日：2011-07-05
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： H04K1/10 , H04L27/28
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。

9. 发明申请

US20100046447A1 BEACON SYMBOL ORTHOGONALIZATION 有权
标题翻译： BEACON符号正交定性
公开(公告)号：US20100046447A1
公开(公告)日：2010-02-25
申请号：US12446689
申请日：2007-10-26
申请人： Ravi Palanki , Alexei Gorokhov , Aamod Khandekar , Avneesh Agrawal
发明人： Ravi Palanki , Alexei Gorokhov , Aamod Khandekar , Avneesh Agrawal
IPC分类号： H04W72/04
CPC分类号： H04L27/261 , H04W28/00 , H04W72/04
摘要： Beacon symbols are sent periodically from the base stations in an OFDM system. The entire power of the base station, or a large portion of it is concentrated in these symbols, thus they are very easily recognized by the mobile stations. The frequencies upon which these symbols are transmitted and the time at which they are transmitted communicates information such as the base station/sector identity and the preferred carrier of the given base station/sector to the mobile station. In order to avoid collision between the beacon symbols of different base stations and sectors, the beacon symbols from different base stations/sectors are transmitted at different symbols times and on different subcarriers.
摘要翻译：信标符号在OFDM系统中从基站周期性地发送。基站的整个功率或其大部分集中在这些符号中，因此它们被移动台非常容易地识别。发送这些符号的频率和它们被发送的时间将诸如基站/扇区标识和给定基站/扇区的优选载波的信息传送给移动站。为了避免不同基站和扇区的信标符号之间的冲突，来自不同基站/扇区的信标符号在不同的符号时间和不同子载波上发送。

10. 发明申请

US20090327843A1 PRUNED BIT-REVERSAL INTERLEAVER 有权
标题翻译：经过翻转的双向交互
公开(公告)号：US20090327843A1
公开(公告)日：2009-12-31
申请号：US12489431
申请日：2009-06-23
申请人： Ravi Palanki , Aamod Khandekar
发明人： Ravi Palanki , Aamod Khandekar
IPC分类号： H03M13/27 , H03M13/05 , G06F11/10 , H03M13/23
CPC分类号： H03M13/2789 , H03M13/2757 , H03M13/276
摘要： A pruned bit-reversal interleaver supports different packet sizes and variable code rates and provides good spreading and puncturing properties. To interleave data, a packet of input data of a first size is received. The packet is extended to a second size that is a power of two, e.g., by appending padding or properly generating write addresses. The extended packet is interleaved in accordance with a bit-reversal interleaver of the second size, which reorders the bits in the extended packet based on their indices. A packet of interleaved data is formed by pruning the output of the bit-reversal interleaver, e.g., by removing the padding or properly generating read addresses. The pruned bit-reversal interleaver may be used in combination with various types of FEC codes such as a Turbo code, a convolutional code, or a low density parity check (LDPC) code.
摘要翻译：修剪的位反转交错器支持不同的分组大小和可变代码率，并提供良好的扩展和打孔属性。为了交织数据，接收到第一大小的输入数据的分组。例如，通过附加填充或适当地生成写入地址，将分组扩展到二次幂的第二大小。扩展分组根据第二大小的位反转交织器进行交织，根据它们的索引对扩展分组中的比特进行重新排序。通过例如通过去除填充或适当地生成读取地址来修剪比特反转交织器的输出来形成交织数据的分组。修剪的位反转交织器可以与诸如Turbo码，卷积码或低密度奇偶校验（LDPC）码的各种类型的FEC码组合使用。

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