公开(公告)号：WO2006107911A2

公开(公告)日：2006-10-12

申请号：PCT/US2006/012410

申请日：2006-03-31

Applicant: MOTOROLA, INC. ,  JASPER, Steven C. ,  CORKE, Robert J. ,  FRANK, Colin D. ,  MAKHLOUF, Isam R.

Inventor： JASPER, Steven C. ,  CORKE, Robert J. ,  FRANK, Colin D. ,  MAKHLOUF, Isam R.

IPC: H04K1/10 ,  H04B1/10

CPC classification number: H04L25/0224 ,  H04L27/2647

Abstract: A system that includes a receiver (100) that is configured for: selecting (210) a set of demodulator output samples and a corresponding set of reference symbols; generating (220) a set of raw channel estimates based on the set of demodulator output samples and the corresponding set of reference symbols; subdividing (230) the set of raw channel estimates into a plurality of subsets; assigning and applying (240) a corresponding reference symbol magnitude quantization scheme to each subset; determining (250) a set of filter coefficients that is based on the quantization schemes applied to the subsets of raw channel estimates; and combining (260) the set of raw channel estimates with the set of filter coefficients to generate a channel estimate.

Abstract translation: 一种包括接收机（100）的系统，其被配置为：选择（210）一组解调器输出样本和相应的一组参考符号; 基于所述解调器输出样本集合和相应的参考符号集合来生成（220）一组原始信道估计; 将所述原始信道估计集合（230）细分为多个子集; 向每个子集分配和应用（240）对应的参考符号量化量化方案; 确定（250）基于应用于原始信道估计的子集的量化方案的一组滤波器系数; 以及将所述原始信道估计集合与所述滤波器系数集合（260）以生成信道估计。

公开(公告)号：WO2010002606A2

公开(公告)日：2010-01-07

申请号：PCT/US2009047874

申请日：2009-06-19

Applicant: MOTOROLA INC ,  RAO YADUNANDANA N ,  CHAUDHRI APOORV ,  CORKE ROBERT J

Inventor： RAO YADUNANDANA N ,  CHAUDHRI APOORV ,  CORKE ROBERT J

IPC: H04L27/26 ,  H04W16/14

CPC classification number: H04L5/0062 ,  H04L5/0007 ,  H04L27/0012

Abstract: Efficient frequency spectrum sharing between at least one incumbent communication system(s) (102, 104) and at least one cognitive radio (CR) system (106, 108) is provided. The CR unit includes OFDM detection (216) for detecting the presence of OFDM signals which indicate the presence of an incumbent communication system within the shared spectrum. The CR system (106) updates channel occupancy information in response to the detected OFDM signals so as not to interfere with the incumbent communication systems (102, 104).

Abstract translation: 提供了至少一个现有通信系统（102,104）和至少一个认知无线电（CR）系统（106,108）之间的有效的频谱共享。 CR单元包括用于检测表示共享频谱内现有通信系统的存在的OFDM信号的存在的OFDM检测（216）。 CR系统（106）响应于检测到的OFDM信号来更新信道占用信息，以便不干扰现有的通信系统（102,104）。

公开(公告)号：WO2009073333A1

公开(公告)日：2009-06-11

申请号：PCT/US2008/083292

申请日：2008-11-13

Applicant: MOTOROLA, INC. ,  GURNEY, David P. ,  AYOUB, Ramy S. ,  BELCEA, John M. ,  BONTA, Jeffrey D. ,  BRAUN, Mark R. ,  CORKE, Robert J. ,  HANSEN, Mark D. ,  SILK, S. David ,  WARE, Christopher G.

Inventor： GURNEY, David P. ,  AYOUB, Ramy S. ,  BELCEA, John M. ,  BONTA, Jeffrey D. ,  BRAUN, Mark R. ,  CORKE, Robert J. ,  HANSEN, Mark D. ,  SILK, S. David ,  WARE, Christopher G.

IPC: H04W52/02 ,  H04W84/12 ,  H04W84/18 ,  H04W88/06

CPC classification number: H04W52/0229 ,  H04W16/14 ,  H04W72/085 ,  H04W84/18 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/22

Abstract: A method and apparatus for operation of a node (102, 104, 106) within a mobile ad hoc cognitive radio network (100) is provided. The method includes sensing at least one assigned communications channel. Sensing at least one assigned communications channel includes measuring a value of at least one parameter corresponding to the communications channel (302). The method further includes comparing the measured value of the at least one parameter with a set of stored values of the at least one parameter (304) to determine a change in the measured values. Finally a sleep mode of the node is activated (306) for a time period, wherein the time period is determined using the change in the measured values.

Abstract translation: 提供了一种用于在移动自组织认知无线电网络（100）内操作节点（102,104,106）的方法和装置。 该方法包括感测至少一个分配的通信信道。 感测至少一个分配的通信信道包括测量对应于通信信道（302）的至少一个参数的值。 该方法还包括将至少一个参数的测量值与至少一个参数（304）的一组存储值进行比较，以确定测量值的变化。 最后，节点的睡眠模式被激活（306）一段时间，其中使用测量值的变化确定时间段。

公开(公告)号：WO2008085593A3

公开(公告)日：2009-04-16

申请号：PCT/US2007083118

申请日：2007-10-31

Applicant: MOTOROLA INC ,  FRANK COLIN D ,  CORKE ROBERT J ,  SEOANE JORGE L

Inventor： FRANK COLIN D ,  CORKE ROBERT J ,  SEOANE JORGE L

IPC: H04J11/00

CPC classification number: H04L25/03159 ,  H04L27/2647

Abstract: An interference contribution associated with a selected subcarrier of a plurality of subcarriers associated with a previously transmitted OFDM symbol or a current OFDM symbol is determined (300). A fast Fourier transform (FFT) output for the current OFDM symbol is also determined (304). The interference contribution is subtracted from the FFT output of the current OFDM symbol to form a modified FFT output (308).

Abstract translation: 确定与先前发送的OFDM符号或当前OFDM符号相关联的多个子载波中的选定副载波相关联的干扰贡献（300）。 还确定了用于当前OFDM符号的快速傅里叶变换（FFT）输出（304）。 从当前OFDM符号的FFT输出中减去干扰贡献以形成修正的FFT输出（308）。

公开(公告)号：WO2008121512A1

公开(公告)日：2008-10-09

申请号：PCT/US2008/056567

申请日：2008-03-12

Applicant: MOTOROLA, INC. ,  RAO, Yadunandana N. ,  CHAUDHRI, Apoorv ,  CORKE, Robert J. ,  DELVE, Trefor J. ,  PRYSBY, Daniel G. ,  WARE, Christopher G. ,  ZELEZNIK, Michael F.

Inventor： RAO, Yadunandana N. ,  CHAUDHRI, Apoorv ,  CORKE, Robert J. ,  DELVE, Trefor J. ,  PRYSBY, Daniel G. ,  WARE, Christopher G. ,  ZELEZNIK, Michael F.

IPC: H04Q7/36 ,  H04Q7/38

CPC classification number: H04W16/14 ,  H04Q2213/13098 ,  H04W48/16

Abstract: A method (20,200) and apparatus (10) for detecting and identifying spectrum opportunities, including the steps of communicating a location of at least one node (12) to at least one base station (14) (24), transmitting a list of at least one channel from the at least one base station (14) to the at least one node (12) (26), and sensing the at least one channel from the list by the at least one node (12) (34). The method (20,200) also includes the steps of determining if the at least one channel is in use, and if the at least one channel is in use, determining the user of the at least one channel that is in use (38).

Abstract translation: 一种用于检测和识别频谱机会的方法（20,200）和装置（10），包括将至少一个节点（12）的位置传送到至少一个基站（14）（24）的步骤， 从所述至少一个基站（14）到所述至少一个节点（12）（26）的至少一个信道，以及由所述至少一个节点（12）（34）从所述列表感测所述至少一个信道。 所述方法（20,200）还包括确定所述至少一个信道是否在使用中的步骤，以及如果所述至少一个信道正在使用中，则确定所述至少一个正在使用的信道的用户（38）。

公开(公告)号：WO2008109267A1

公开(公告)日：2008-09-12

申请号：PCT/US2008/054671

申请日：2008-02-22

Applicant: MOTOROLA, INC. ,  HEKMANN, Ralf, ,  CORKE, Robert J., ,  PRYSBY, Daniel G.,

Inventor： HEKMANN, Ralf, ,  CORKE, Robert J., ,  PRYSBY, Daniel G.,

IPC: H04B7/26 ,  H04B11/00 ,  H04L27/26 ,  H04B1/06

CPC classification number: H04L25/022 ,  H04L25/0224 ,  H04L25/0232

Abstract: A system and method for performing channel estimation. The system includes a receiver for decoding OFDM. Upon receiving an OFDM symbol, a plurality of demodulated subcarrier modulation symbols for the OFDM symbol are generated. The demodulated subcarrier modulation symbols are then decoded to generate decoder output code symbols. At least a portion of the decoder output code symbols are reencoded, interleaved, and mapped to a set of reference symbols, where the set of reference symbols correspond to at least a portion of the plurality of subcarriers. A first set of channel estimates is generated, based on at least a portion of the set of reference symbols and a corresponding portion of the plurality of demodulated symbols. Remaining channel estimates are then interpolated from the first set of estimates by filtering the first set of estimates. The channel estimates are then used in decoding a current OFDM symbol being received by the receiver.

Abstract translation: 用于执行信道估计的系统和方法。 该系统包括用于解码OFDM的接收机。 在接收到OFDM符号时，产生用于OFDM符号的多个解调的子载波调制符号。 然后解调的副载波调制符号被解码以产生解码器输出码符号。 解码器输出码符号的至少一部分被重新编码，交织和映射到一组参考符号，其中参考符号组对应于多个子载波的至少一部分。 基于参考符号组的至少一部分和多个解调符号的相应部分来生成第一组信道估计。 然后通过过滤第一组估计值，从第一组估计值插值剩余的信道估计值。 然后，将信道估计用于对由接收机接收的当前OFDM符号进行解码。

公开(公告)号：WO2008085594A3

公开(公告)日：2008-07-17

申请号：PCT/US2007/083119

申请日：2007-10-31

Applicant: MOTOROLA, INC. ,  FRANK, Colin, D. ,  CONRAD, Alan, P. ,  CORKE, Robert, J. ,  SEOANE, Jorge, L.

Inventor： FRANK, Colin, D. ,  CONRAD, Alan, P. ,  CORKE, Robert, J. ,  SEOANE, Jorge, L.

IPC: H04J11/00

Abstract: First incoming data comprising at least one OFDM symbol is received (302). A plurality of timing relationships is determined and each of the plurality of timing relationships relates to an alignment window of a fast Fourier transform (FFT) (304). Each of the plurality of timing relationships is applied to the first incoming data (306) and a plurality of achievable interference metrics associated with the first incoming data is responsively determined (308). Each of the plurality of achievable interference metrics is associated with a selected one of the plurality of timing relationships. The preferred interference metric is chosen from amongst the plurality of achievable interference metrics.

公开(公告)号：WO2008085593A2

公开(公告)日：2008-07-17

申请号：PCT/US2007/083118

申请日：2007-10-31

Applicant: MOTOROLA, INC. ,  FRANK, Colin, D. ,  CORKE, Robert, J. ,  SEOANE, Jorge, L.

Inventor： FRANK, Colin, D. ,  CORKE, Robert, J. ,  SEOANE, Jorge, L.

IPC: H04L27/28 ,  H04B1/10

CPC classification number: H04L25/03159 ,  H04L27/2647

Abstract: An interference contribution associated with a selected subcarrier of a plurality of subcarriers associated with a previously transmitted OFDM symbol or a current OFDM symbol is determined (300). A fast Fourier transform (FFT) output for the current OFDM symbol is also determined (304). The interference contribution is subtracted from the FFT output of the current OFDM symbol to form a modified FFT output (308).

Abstract translation: 确定与先前发送的OFDM符号或当前OFDM符号相关联的多个子载波中的选定副载波相关联的干扰贡献（300）。 还确定了用于当前OFDM符号的快速傅里叶变换（FFT）输出（304）。 从当前OFDM符号的FFT输出中减去干扰贡献以形成修正的FFT输出（308）。

公开(公告)号：WO2006107911B1

公开(公告)日：2007-07-26

申请号：PCT/US2006012410

申请日：2006-03-31

Applicant: MOTOROLA INC ,  JASPER STEVEN C ,  CORKE ROBERT J ,  FRANK COLIN D ,  MAKHLOUF ISAM R

Inventor： JASPER STEVEN C ,  CORKE ROBERT J ,  FRANK COLIN D ,  MAKHLOUF ISAM R

IPC: H03D1/00 ,  H03K9/00 ,  H04B1/10 ,  H04B3/46 ,  H04L27/00 ,  H04L27/06 ,  H04Q1/20

CPC classification number: H04L25/0224 ,  H04L27/2647

Abstract: A system that includes a receiver (100) that is configured for: selecting (210) a set of demodulator output samples and a corresponding set of reference symbols; generating (220) a set of raw channel estimates based on the set of demodulator output samples and the corresponding set of reference symbols; subdividing (230) the set of raw channel estimates into a plurality of subsets; assigning and applying (240) a corresponding reference symbol magnitude quantization scheme to each subset; determining (250) a set of filter coefficients that is based on the quantization schemes applied to the subsets of raw channel estimates; and combining (260) the set of raw channel estimates with the set of filter coefficients to generate a channel estimate.

Abstract translation: 一种包括接收机（100）的系统，所述接收机（100）被配置用于：选择（210）一组解调器输出采样和对应的一组参考符号; 基于所述一组解调器输出采样和所述对应的参考符号集合生成（220）一组原始信道估计; 将所述一组原始信道估计值细分（230）为多个子集; 将对应的参考符号量值方案分配并应用（240）到每个子集; 基于应用于原始信道估计的子集的量化方案来确定（250）一组滤波器系数; 以及将该组原始信道估计与该组滤波器系数组合（260）以生成信道估计。

公开(公告)号：WO2007027442A2

公开(公告)日：2007-03-08

申请号：PCT/US2006/032124

申请日：2006-08-17

Applicant: MOTOROLA INC. ,  KAHANA, Emanuel ,  CORKE, Robert J. ,  PRYSBY, Daniel G. ,  ROTSTEIN, Ron

Inventor： KAHANA, Emanuel ,  CORKE, Robert J. ,  PRYSBY, Daniel G. ,  ROTSTEIN, Ron

IPC: H04Q7/20

CPC classification number: H04W72/085 ,  H04W74/08 ,  H04W84/12 ,  H04W88/02

Abstract: The present invention relates to a method, device and system for dynamically adapting a clear channel assessment threshold of a wireless communications channel by determining the status of a busy channel indicator for at least a first parameter (105) and dynamically changing the clear channel assessment threshold based on the status of the busy channel indicator (110).

Abstract translation: 本发明涉及用于通过针对至少第一参数（105）确定繁忙信道指示符的状态来动态调整无线通信信道的净信道评估阈值的方法，设备和系统， 并基于繁忙信道指示符（110）的状态动态地改变空闲信道评估阈值。