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：WO2009018199A2

公开(公告)日：2009-02-05

申请号：PCT/US2008/071312

申请日：2008-07-28

Applicant: MOTOROLA, INC. ,  NAGARAJ, Geetha B. ,  CAFARO, Nicholas G. ,  HEKMANN, Ralf ,  STENGEL, Robert E. ,  MILLER, Scott

Inventor： NAGARAJ, Geetha B. ,  CAFARO, Nicholas G. ,  HEKMANN, Ralf ,  STENGEL, Robert E. ,  MILLER, Scott

IPC: H03D3/00

CPC classification number: H03B21/02 ,  H03L7/0814

Abstract: A method and system for managing Digital to Time Conversion (DTC) is provided. The method comprises receiving a first Radio Frequency (RF) signal and a second RF signal. The second RF signal is a phase-shifted first RF signal. The method further comprises converting the first RF signal to a first Intermediate Frequency (IF) signal and the second RF signal to a second IF signal. Further, a time delay between the first IF signal and the second IF signal is estimated based on a time difference measurement technique. The second RF signal is processed based on the estimated time delay to compensate for a delay error associated with the second RF signal.

Abstract translation: 提供了一种用于管理数字到时间转换（DTC）的方法和系统。 该方法包括接收第一射频（RF）信号和第二RF信号。 第二RF信号是相移的第一RF信号。 该方法还包括将第一RF信号转换为第一中频（IF）信号，将第二RF信号转换为第二IF信号。 此外，基于时差测量技术来估计第一IF信号和第二IF信号之间的时间延迟。 基于估计的时间延迟来处理第二RF信号以补偿与第二RF信号相关联的延迟误差。

公开(公告)号：WO2009029465A1

公开(公告)日：2009-03-05

申请号：PCT/US2008/073802

申请日：2008-08-21

Applicant: MOTOROLA, INC. ,  WARE, Christopher, G. ,  HEKMANN, Ralf ,  CORKE, Robert, J. ,  DELVE, Trefor, J. ,  PRYSBY, Daniel, G. ,  ZELEZNIK, Michael, F.

Inventor： HEKMANN, Ralf ,  CORKE, Robert, J. ,  DELVE, Trefor, J. ,  PRYSBY, Daniel, G. ,  ZELEZNIK, Michael, F.

IPC: H04B1/713

CPC classification number: H04B1/715 ,  H04B1/7136 ,  H04B2001/7154

Abstract: A method, system and apparatus for managing communication in a Public Safety Communication Network (PSCN). The PSCN includes a plurality of Mobile Stations (MSs) (110, 115, 120) and a master controller (105). The method includes initiating a communication between one or more MSs and the master controller using a primary channel (405). The primary channel corresponds to a primary frequency spectrum in the PSCN. The method further includes identifying one or more available channels in one or more of the primary frequency spectrum and a secondary frequency spectrum (410). Each of the primary frequency spectrum and the secondary frequency spectrum include one or more channels. Thereafter, a channel hopping pattern is generated for one or more MSs based on one or more available channels (415). The channel hopping pattern corresponds to a sequence of frequency hops for a MS.

Abstract translation: 一种用于管理公共安全通信网络（PSCN）中的通信的方法，系统和装置。 PSCN包括多个移动站（MS）（110,115,120）和主控制器（105）。 该方法包括使用主信道（405）发起一个或多个MS与主控制器之间的通信。 主信道对应于PSCN中的主频谱。 该方法还包括识别一个或多个主频谱和次频谱中的一个或多个可用信道（410）。 主频谱和次频谱中的每一个包括一个或多个信道。 此后，基于一个或多个可用信道（415）为一个或多个MS生成信道跳频模式。 信道跳频模式对应于MS的跳频序列。

公开(公告)号：WO2003091877A3

公开(公告)日：2003-11-06

申请号：PCT/EP2003/003437

申请日：2003-04-02

Applicant: MOTOROLA INC ,  BOURZEIX, Francois ,  HEKMANN, Ralf

Inventor： BOURZEIX, Francois ,  HEKMANN, Ralf

IPC: G06F9/48

Abstract: A time trigger for instruction execution can be contained within the instruction itself. A time stamp value associated with each of a sequence of instructions, which are written into a FIFO memory (9) by an application specific controller (1), is compared with the output value of a counter (11). When the two values are equal, a comparator 10 sends a command to an instruction decoder (8) to execute the current instruction. The invention has the advantage of a reduced interrupt overhead and his particular application to HiperLAN 2 systems in which it can be incorporated without affecting the protocol handling.

公开(公告)号：WO2009018199A3

公开(公告)日：2010-04-08

申请号：PCT/US2008071312

申请日：2008-07-28

Applicant: MOTOROLA INC ,  NAGARAJ GEETHA B ,  CAFARO NICHOLAS G ,  HEKMANN RALF ,  STENGEL ROBERT E ,  MILLER SCOTT

Inventor： NAGARAJ GEETHA B ,  CAFARO NICHOLAS G ,  HEKMANN RALF ,  STENGEL ROBERT E ,  MILLER SCOTT

IPC: H03L7/081

CPC classification number: H03B21/02 ,  H03L7/0814

Abstract: A method and system for managing Digital to Time Conversion (DTC) is provided. The method comprises receiving a first Radio Frequency (RF) signal and a second RF signal. The second RF signal is a phase-shifted first RF signal. The method further comprises converting the first RF signal to a first Intermediate Frequency (IF) signal and the second RF signal to a second IF signal. Further, a time delay between the first IF signal and the second IF signal is estimated based on a time difference measurement technique. The second RF signal is processed based on the estimated time delay to compensate for a delay error associated with the second RF signal.

Abstract translation: 提供了一种用于管理数字到时间转换（DTC）的方法和系统。 该方法包括接收第一射频（RF）信号和第二RF信号。 第二RF信号是相移的第一RF信号。 该方法还包括将第一RF信号转换为第一中频（IF）信号，将第二RF信号转换为第二IF信号。 此外，基于时差测量技术来估计第一IF信号和第二IF信号之间的时间延迟。 基于估计的时间延迟来处理第二RF信号以补偿与第二RF信号相关联的延迟误差。

公开(公告)号：WO2009029413A1

公开(公告)日：2009-03-05

申请号：PCT/US2008/072937

申请日：2008-08-13

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

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

IPC: H04B7/26

CPC classification number: H04W72/02 ,  H04W72/0453 ,  H04W84/08

Abstract: A wireless communication network is provided in which a plurality of radio devices achieve frequency diversity. By utilizing cognitive capability within the radio devices to iteratively select frequency sets, a lowest cardinality frequency set is generated and used to communicate amongst the plurality of radio devices. Each radio device can have different hardware, as the iterative selection of frequency set can take into account the different hardware capabilities of the radio devices.

Abstract translation: 提供了一种无线通信网络，其中多个无线电设备实现频率分集。 通过利用无线电设备内的认知能力来迭代地选择频率集合，生成最低基数频率集合并用于在多个无线电设备之间进行通信。 每个无线电设备可以具有不同的硬件，因为频率集合的迭代选择可以考虑到无线电设备的不同硬件能力。

公开(公告)号：WO2003091877A2

公开(公告)日：2003-11-06

申请号：PCT/EP2003/003437

申请日：2003-04-02

Applicant: MOTOROLA INC ,  BOURZEIX, Francois ,  HEKMANN, Ralf

Inventor： BOURZEIX, Francois ,  HEKMANN, Ralf

IPC: G06F9/48

CPC classification number: G06F9/4881

Abstract: A time trigger for instruction execution can be contained within the instruction itself. A time stamp value associated with each of a sequence of instructions, which are written into a FIFO memory (9) by an application specific controller (1), is compared with the output value of a counter (11). When the two values are equal, a comparator 10 sends a command to an instruction decoder (8) to execute the current instruction. The invention has the advantage of a reduced interrupt overhead and his particular application to HiperLAN 2 systems in which it can be incorporated without affecting the protocol handling.

Abstract translation: 指令执行的时间触发可以包含在指令本身中。 与应用特定控制器（1）写入FIFO存储器（9）的指令序列中的每一个相关联的时间戳值与计数器（11）的输出值进行比较。 当两个值相等时，比较器10向指令解码器（8）发送命令以执行当前指令。 本发明具有减少的中断开销和他对HiperLAN 2系统的特定应用的优点，其中可以并入该系统，而不影响协议处理。