公开(公告)号：US20080165743A1

公开(公告)日：2008-07-10

申请号：US11969200

申请日：2008-01-03

申请人： Ravi Palanki ,  Alexei Gorokhov ,  Aamod Khandekar ,  Naga Bhushan

发明人： Ravi Palanki ,  Alexei Gorokhov ,  Aamod Khandekar ,  Naga Bhushan

IPC分类号： H04Q7/20 ,  H04B7/216 ,  H04J3/00

CPC分类号： H04W72/04 ,  H04B1/692 ,  H04B1/7143 ,  H04L5/0012 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0055 ,  H04L27/0008

摘要： Techniques for allocating and mapping resources in a wireless communication system are described. The system may use hop-ports to facilitate allocation and use of subcarriers. In one aspect, the hop-ports may be partitioned into multiple subzones, with each subzone including a configurable number of hop-ports. The hop-ports within each subzone may be permuted or shuffled based on a permutation function. After permutation, the hop-ports in all subzones may be mapped to the subcarriers based on local or global hopping. In another aspect, a set of hop-ports may be mapped to a set of subcarriers. A hop-port may be mapped to an unavailable subcarrier and may then be remapped to another available subcarrier. In yet another aspect, a set of hop-ports may be mapped to a set of subcarriers distributed (e.g., evenly) across all subcarriers but avoiding subcarriers in a reserved zone.

摘要翻译： 描述了用于在无线通信系统中分配和映射资源的技术。 系统可以使用跳转端口来促进子载波的分配和使用。 在一个方面，跳跃端口可以被划分成多个子区域，每个子区域包括可配置数量的跳接口。 基于置换功能，每个子区域内的跳转口可以被排列或混洗。 在排列之后，所有子区域中的跳跃端口可以基于本地或全局跳频映射到子载波。 在另一方面，一组跳跃端口可以映射到一组子载波。 跳跃端口可以被映射到不可用的子载波，然后可以重新映射到另一个可用的子载波。 在另一方面，一组跳跃端口可以被映射到跨所有子载波分布（例如，均匀）但是避开保留区域中的子载波的一组子载波。

公开(公告)号：US20080130529A1

公开(公告)日：2008-06-05

申请号：US11848842

申请日：2007-09-06

申请人： Aamod Khandekar ,  Alexei Gorokhov ,  Ravi Palanki

发明人： Aamod Khandekar ,  Alexei Gorokhov ,  Ravi Palanki

IPC分类号： H04L5/16

CPC分类号： H04B7/2656

摘要： Systems and methodologies are described that provide support for signal acquisition in wireless communication systems that utilize half-duplex communication in the presence of asynchronous sectors. Forward link and reverse link superframes can be structured such that a given frame position in a superframe alternates between forward link communication and reverse link communication for a particular half-duplex interlace. More particularly, an odd number of frames can be grouped into respective forward link and reverse link superframes, from which frames can be assigned to a first half-duplex interlace and a second half-duplex interlace in an alternating fashion. By varying the communication link used by a half-duplex interlace at a given frame location, terminals operating on a single half-duplex interlace can detect asynchronously operating sectors irrespective of the transmission timeline of such sectors.

摘要翻译： 描述了在存在异步扇区的情况下利用半双工通信的无线通信系统中的信号获取的支持的系统和方法。 可以构造前向链路和反向链路超帧，使得超帧中的给定帧位置在特定半双工交错的前向链路通信和反向链路通信之间交替。 更具体地，奇数帧可以被分组成相应的前向链路和反向链路超帧，从该帧可以以交替的方式将帧分配给第一半双工交错和第二半双工交错。 通过改变在给定帧位置处的半双工交错使用的通信链路，在单个半双工交错上操作的终端可以检测异步操作扇区，而与这些扇区的传输时间线无关。

公开(公告)号：US20080095036A1

公开(公告)日：2008-04-24

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。

公开(公告)号：US20070147226A1

公开(公告)日：2007-06-28

申请号：US11552966

申请日：2006-10-25

申请人： Aamod Khandekar ,  Ravi Palanki

发明人： Aamod Khandekar ,  Ravi Palanki

IPC分类号： H04J11/00

CPC分类号： H04L5/0044 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0053 ,  H04L27/2602 ,  H04L27/2613 ,  H04L27/2626 ,  H04L27/2666

摘要： Techniques to flexibly support different bandwidths in a wireless communication system are described. The system supports a configurable operating bandwidth using a fixed design bandwidth and variable guard bands. Values for various parameters such as fast Fourier transform (FFT) size, cyclic prefix length, and sample rate may be selected based on the design bandwidth. The design bandwidth may be associated with K total subcarriers. Different operating bandwidths may be supported by selecting different numbers of usable subcarriers. A transmitter and a receiver may perform processing for a transmission using the same FFT size, cyclic prefix length, and sample rate regardless of the selected operating bandwidth. The system may use different operating bandwidths and/or different parameter values (e.g., FFT sizes) for different portions of a transmission, e.g., a preamble and a main body of the transmission.

摘要翻译： 描述了在无线通信系统中灵活地支持不同带宽的技术。 该系统支持使用固定设计带宽和可变保护频段的可配置工作带宽。 可以基于设计带宽来选择诸如快速傅里叶变换（FFT）大小，循环前缀长度和采样率等各种参数的值。 设计带宽可能与K个总子载波相关联。 可以通过选择不同数量的可用副载波来支持不同的工作带宽。 发射机和接收机可以使用相同的FFT大小，循环前缀长度和采样率来执行用于传输的处理，而与所选择的操作带宽无关。 系统可以对传输的不同部分（例如，前导码和传输的主体）使用不同的操作带宽和/或不同的参数值（例如，FFT大小）。

公开(公告)号：US20060291470A1

公开(公告)日：2006-12-28

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.

公开(公告)号：US20060274679A1

公开(公告)日：2006-12-07

申请号：US11435572

申请日：2006-05-16

申请人： Aamod Khandekar ,  Arak Sutivong ,  Ravi Palanki

发明人： Aamod Khandekar ,  Arak Sutivong ,  Ravi Palanki

IPC分类号： H04B7/005 ,  H04L5/14

CPC分类号： H04W24/00 ,  H04B1/713 ,  H04L5/0026 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/023 ,  H04L5/1461 ,  H04L5/1469 ,  H04L25/0226 ,  H04W28/20 ,  H04W72/042 ,  H04W88/08

摘要： Systems and methodologies are described that facilitate providing time-division duplexed beam-forming support in traditionally non-time-division duplexed wireless systems, such as an OFDMA system, a WCDMA system, etc. According to an aspect, a base station can analyze pilot information, such as a portion of bandwidth over which a user device is transmitting, and can transmit on the downlink using pre-hopped portion of bandwidth utilized by the user device on the preceding reverse link time slot. The base station can additionally transmit bandwidth segment reassignments to the user device to facilitate bandwidth segment hopping between user devices served by the base station. Additionally, the base station can instruct the user device to provide on-demand pilot information to resolve ambiguity related thereto.

摘要翻译： 描述了有助于在诸如OFDMA系统，WCDMA系统等传统的非时分双工无线系统中提供时分双工的波束形成支持的系统和方法。根据一方面，基站可以分析导频 信息，诸如用户设备正在发送的带宽的一部分，并且可以使用在前一反向链路时隙上的用户设备利用的带宽的预跳跃部分在下行链路上进行发送。 基站可以另外向用户设备发送带宽段重新分配，以便于由基站服务的用户设备之间的带宽段跳频。 此外，基站可以指示用户设备提供按需导频信息以解决与之相关的模糊性。

公开(公告)号：US20060156199A1

公开(公告)日：2006-07-13

申请号：US11022485

申请日：2004-12-22

申请人： Ravi Palanki ,  Aamod Khandekar

发明人： Ravi Palanki ,  Aamod Khandekar

IPC分类号： H03M13/00

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.

公开(公告)号：US08514829B2

公开(公告)日：2013-08-20

申请号：US12238832

申请日：2008-09-26

申请人： Jing Sun ,  Aamod Khandekar ,  Ravi Palanki

发明人： Jing Sun ,  Aamod Khandekar ,  Ravi Palanki

IPC分类号： H04J1/00 ,  H04L5/00

CPC分类号： H04L5/0007 ,  H04L5/0044 ,  H04W72/00

摘要： The method and apparatus as described are directed toward techniques and mechanisms to improve efficient wireless network implementation, including obtaining one specification including a center frequency definition, determining, based on the specification, a center frequency of at least one carrier used to operate on the wireless communication system, determining an amount of dithering to add to the center frequency, and setting the center frequency to be multiples of sub-carrier spacing by adding the dithering.

摘要翻译： 所描述的方法和装置涉及改进有效的无线网络实现的技术和机制，包括获得包括中心频率定义的一个规范，基于规范确定用于在无线网络上操作的至少一个载波的中心频率 通信系统，确定要添加到中心频率的抖动量，以及通过添加抖动将中心频率设置为副载波间隔的倍数。

公开(公告)号：US08374200B2

公开(公告)日：2013-02-12

申请号：US11768135

申请日：2007-06-25

申请人： Alexei Gorokhov ,  Aamod Khandekar ,  Mohammad J. Borran ,  Rajat Prakash ,  Ravi Palanki

发明人： Alexei Gorokhov ,  Aamod Khandekar ,  Mohammad J. Borran ,  Rajat Prakash ,  Ravi Palanki

IPC分类号： H04J3/24

CPC分类号： H04L1/0045 ,  H04L1/0061 ,  H04L1/0072 ,  H04L1/0078

摘要： Various methods and systems receiving information from an access point over a wireless link in order to reduce processing and/or transmission overhead are disclosed. Such methods and systems may include the processing of a received packet using a descrambling operation on at least a portion of the packet's information based on a MAC-ID associated with an access terminal to produce at least a first processed packet, and determining whether the received packet is targeted to the access terminal based on the first processed packet.

摘要翻译： 公开了通过无线链路从接入点接收信息以减少处理和/或传输开销的各种方法和系统。 这样的方法和系统可以包括基于与接入终端相关联的MAC-ID，使用对分组信息的至少一部分的解扰操作来处理接收到的分组，以产生至少第一处理分组，以及确定是否接收到 分组基于第一处理分组被定向到接入终端。

公开(公告)号：US08331216B2

公开(公告)日：2012-12-11

申请号：US11332604

申请日：2006-01-12

申请人： Ravi Palanki ,  Aamod Khandekar

发明人： Ravi Palanki ,  Aamod Khandekar

IPC分类号： H04J11/00 ,  H04W36/00 ,  H04B7/00 ,  H04K1/10

CPC分类号： H04L25/022 ,  H04B7/12 ,  H04L5/023 ,  H04L25/0232 ,  H04L27/2613 ,  H04L27/2647

摘要： In a single-carrier frequency division multiple access (SC-FDMA) system, a receiver receives transmission symbols from a transmitter, determines a set of subbands used by the transmitter, processes the received transmission symbols for the set of subbands, obtains received pilot values for a transmitted pilot, and obtains received data values for transmitted data. The receiver may iteratively perform channel and interference estimation for the transmitter. The receiver selects an initial interference estimate, derives a channel estimate based on the received pilot values and the interference estimate, and derives a new interference estimate based on the received pilot values and the channel estimate. The receiver may repeat the derivation of the channel estimate and the interference estimate for multiple iterations. The receiver then performs data detection and/or receiver spatial processing on the received data values based on the channel estimate and the interference estimate.

摘要翻译： 在单载波频分多址（SC-FDMA）系统中，接收机从发射机接收发射符号，确定发射机使用的一组子带，处理该子带组的接收的传输符号，获得接收到的导频值 并且获得用于发送数据的接收数据值。 接收机可以迭代地执行发射机的信道和干扰估计。 接收机选择初始干扰估计，基于接收的导频值和干扰估计导出信道估计，并且基于接收的导频值和信道估计导出新的干扰估计。 接收机可以重复导出信道估计和多次迭代的干扰估计。 接收机然后基于信道估计和干扰估计对所接收的数据值执行数据检测和/或接收机空间处理。