公开(公告)号：JP2006222966A

公开(公告)日：2006-08-24

申请号：JP2006030747

申请日：2006-02-08

Applicant: MOTOROLA INC

Inventor： WANG FANG ,  GHOSH AMITAVA ,  SANKARAN CHANDRASEKAR ,  TAN JUN

IPC: H04B1/707

Abstract: PROBLEM TO BE SOLVED: To provide a method and apparatus for transmission and reception of data. SOLUTION: Various embodiments are described to provide for the transmission and reception of data in an improved manner. Data transmission includes in a transmitter a null generator (110) to generate an output data symbol sequence that exhibits nulls in the frequency domain at particular frequencies without an input data symbol sequence. A pilot inserter (120) adds a pilot symbol sequence to this output data symbol sequence to create a combined symbol sequence. Since the pilot symbol sequence exhibits pilot signals corresponding to the nulls of the output data symbol sequence in the frequency domain, the combined symbol sequence exhibits pilots that are orthogonal to the data in the frequency domain. COPYRIGHT: (C)2006,JPO&NCIPI

公开(公告)号：BRPI0600341A

公开(公告)日：2007-03-06

申请号：BRPI0600341

申请日：2006-02-08

Applicant: MOTOROLA INC

Inventor： WANG FAN ,  GHOSH AMITAVA ,  SANKARAN CHANDRASEKAR ,  TAN JUN

IPC: H04B1/707 ,  H04K1/10 ,  H04L7/00

Abstract: Various embodiments are described to provide for the transmission and reception of data in an improved manner. Data transmission is improved by including in a transmitter a null generator (110) to generate an output data symbol sequence that exhibits nulls in the frequency domain at particular frequencies that an input data symbol sequence does not. A pilot inserter (120) then adds a pilot symbol sequence to this output data symbol sequence to create a combined symbol sequence. Since the pilot symbol sequence exhibits pilot signals corresponding to the nulls of the output data symbol sequence in the frequency domain, the combined symbol sequence exhibits pilots that are orthogonal to the data in the frequency domain. Application to a hybrid OFDM-CDMA system where spreading is performed in the time domain.

公开(公告)号：CA2533360A1

公开(公告)日：2006-08-09

申请号：CA2533360

申请日：2006-01-20

Applicant: MOTOROLA INC

Inventor： WANG FAN ,  GHOSH AMITAVA ,  SANKARAN CHANDRASEKAR ,  TAN JUN

IPC: H04J13/00

Abstract: Various embodiments are described to provide for the transmission and reception of data in an improved manner. Data transmission is improved by including in a transmitter a null generator (110) to generate an output data symbol sequence that exhibits nulls in the frequency domain at particular frequencies that an input data symbol sequence does not. A pilot inserter (120) then adds a pilot symbol sequence to this output data symbol sequence to create a combined symbol sequence. Since the pilot symbol sequence exhibits pilot signals corresponding to the nulls of the output data symbol sequence in the frequency domain, the combined symbol sequence exhibits pilots that are orthogonal to the data in the frequency domain.

公开(公告)号：WO2007084840A3

公开(公告)日：2007-12-27

申请号：PCT/US2007060453

申请日：2007-01-12

Applicant: MOTOROLA INC ,  TAN JUN ,  GHOSH AMITAVA ,  RATASUK RAPEEPAT ,  WANG FAN ,  XIAO WEIMIN

Inventor： TAN JUN ,  GHOSH AMITAVA ,  RATASUK RAPEEPAT ,  WANG FAN ,  XIAO WEIMIN

IPC: H04B7/216

CPC classification number: H04L27/2613 ,  H04J13/004 ,  H04J13/102 ,  H04L5/0007 ,  H04L5/0021 ,  H04L5/0048 ,  H04L25/0228 ,  H04L27/2605 ,  H04L27/2655

Abstract: A system and method for initializing a system communication without previous reservations for random access channel (RACH) access includes a first step of defining at least one spread sequence derived from at least one constant amplitude zero autocorrelation sequence. A next step includes combining the spread sequence with a Walsh code to form an extended spread sequence. A next step includes using the extended spread sequence in a preamble for a RACH. A next step includes sending the preamble to a BTS for acquisition. A next step includes monitoring for a positive acquisition indicator from the BTS. A next step includes scheduling the sending of a RACH message. A next step includes sending the RACH message.

Abstract translation: 用于初始化系统通信而没有对随机接入信道（RACH）接入的先前保留的系统和方法包括定义从至少一个恒定幅度零自相关序列导出的至少一个扩展序列的第一步骤。 下一步包括将扩展序列与沃尔什码组合以形成扩展扩展序列。 下一步包括在RACH的前同步码中使用扩展扩展序列。 下一步包括将前导码发送到BTS进行采集。 下一步包括监测来自BTS的正采集指示符。 下一步包括调度RACH消息的发送。 下一步包括发送RACH消息。

公开(公告)号：CA2533360C

公开(公告)日：2009-07-14

申请号：CA2533360

申请日：2006-01-20

Applicant: MOTOROLA INC

Inventor： WANG FAN ,  GHOSH AMITAVA ,  TAN JUN ,  SANKARAN CHANDRASEKAR

IPC: H04J13/00

Abstract: Various embodiments are described to provide for the transmission and reception of data in an improved manner. Data transmission is improved by including in a transmitter a null generator (110) to generate an output data symbol sequence that exhibits nulls in the frequency domain at particular frequencies that an input data symbol sequence does not. A pilot inserter (120) then adds a pilot symbol sequence to this output data symbol sequence to create a combined symbol sequence. Since the pilot symbol sequence exhibits pilot signals corresponding to the nulls of the output data symbol sequence in the frequency domain, the combined symbol sequence exhibits pilots that are orthogonal to the data in the frequency domain.

公开(公告)号：WO2008079472A3

公开(公告)日：2008-09-18

申请号：PCT/US2007078993

申请日：2007-09-20

Applicant: MOTOROLA INC ,  WANG FAN ,  DOWNING LAWRENCE A ,  GHOSH AMITAVA ,  SANKARAN CHANDRASEKAR ,  TAN JUN

Inventor： WANG FAN ,  DOWNING LAWRENCE A ,  GHOSH AMITAVA ,  SANKARAN CHANDRASEKAR ,  TAN JUN

IPC: H04B7/02 ,  H04J99/00 ,  H04L1/02

CPC classification number: H04B7/0689 ,  H04B7/0417 ,  H04B7/063 ,  H04B7/0669 ,  H04B7/0697 ,  H04H20/22 ,  H04H60/11

Abstract: A radio communications device (102) that has multiple receive antennas processes received data communications signals to select between space time coding and spatial multiplexing as a selected transmission technique from a base device (104) that has multiple transmit antennas. A channel throughput (402-412, 450-454) for each transmission technique is estimated based on signal to interference and noise ratios (502-512, 550-554) of signals being transmitted through a MIMO channel (140) as measured by a receiver (708). The transmission technique with the higher estimated throughput is determined. If spatial multiplexing is determined to have the higher estimated throughput and the throughput of each layer of the spatially multiplexed signal is greater than a threshold, spatial multiplexing is selected. Otherwise, space time coding is selected.

Abstract translation: 具有多个接收天线的无线电通信设备（102）处理接收到的数据通信信号，以从具有多个发射天线的基站设备（104）中选择在空间时间编码和空间复用之间作为所选择的传输技术。 基于通过MIMO信道（140）发送的信号的信号与干扰和噪声比（502-512,55-554）来估计用于每个传输技术的信道吞吐量（402-412,450-454），如由 接收器（708）。 确定具有较高估计吞​​吐量的传输技术。 如果确定空间复用具有较高的估计吞吐量，并且空间复用信号的每层的吞吐量大于阈值，则选择空间复用。 否则，选择空时编码。

公开(公告)号：WO2007084843A2

公开(公告)日：2007-07-26

申请号：PCT/US2007060458

申请日：2007-01-12

Applicant: MOTOROLA INC ,  WHINNETT NICK W ,  GHOSH AMITAVA ,  TAN JUN

Inventor： WHINNETT NICK W ,  GHOSH AMITAVA ,  TAN JUN

IPC: H04K1/10

CPC classification number: H04L27/2614

Abstract: A transmitter comprises functionality (101, 103) for generating a block of input modulation symbols for example from received data bits. An M-point discrete Fourier transform (105) is applied to the block of input modulation symbols resulting in a frequency domain symbol block. This block is fed to an N-point inverse discrete Fourier transform (105) (N>M) thereby generating a time domain transmit signal. In addition, the transmitter (200) comprises an inter-symbol processor (201) which determines inter-symbol values corresponding to inter-symbol times of the time domain transmit signal and an attenuation processor (203) which attenuates at least one of the input modulation symbols in response to the inter-symbol values. By attenuating selected input modulation symbol(s) a significantly reduced amplitude variation and specifically peak-to-average amplitude variation can be achieved.

Abstract translation: 发射机包括用于例如从接收的数据比特中生成输入调制符号块的功能（101,103）。 将M点离散傅里叶变换（105）应用于输入调制符号块，得到频域符号块。 该块被馈送到N点离散傅里叶逆变换（105）（N> M），由此生成时域发送信号。 另外，发送器（200）包括确定与时域发送信号的符号间符号时间对应的符号间符号值的符号间处理器（201）和衰减输入中的至少一个的衰减处理器（203） 调制符号以响应符号间值。 通过衰减选择的输入调制符号，可以实现显着减小的幅度变化并且特别是峰值 - 平均幅度变化。

公开(公告)号：WO2007146561A3

公开(公告)日：2008-11-06

申请号：PCT/US2007069502

申请日：2007-05-23

Applicant: MOTOROLA INC ,  YANG WEIDONG ,  TAN JUN ,  CLASSON BRIAN K ,  BAUM KEVIN L ,  NANGIA VIJAY

Inventor： YANG WEIDONG ,  TAN JUN ,  CLASSON BRIAN K ,  BAUM KEVIN L ,  NANGIA VIJAY

IPC: H04J11/00

CPC classification number: H04L27/2626 ,  H04L5/0007 ,  H04L25/03171 ,  H04L27/0008

Abstract: An apparatus and method for switching between a first and a second Orthogonal Frequency Division Multiplexing (OFDM) communication mode includes a first step of determining an operational modulation scheme. A next step includes estimating a first performance factor for the modulation scheme in the first communication mode and a second performance factor for the modulation scheme in the second communication mode. A next step includes comparing the first and second performance factors against at least one selection criterion. A next step includes selecting the communication mode in response to the selection criterion and the modulation scheme. A next step includes transmitting on the selected communication mode using the modulation scheme.

Abstract translation: 用于在第一和第二正交频分复用（OFDM）通信模式之间切换的装置和方法包括确定操作调制方案的第一步骤。 下一步骤包括在第一通信模式中估计用于调制方案的第一性能因子和用于第二通信模式中的调制方案的第二性能因子。 下一步骤包括将第一和第二性能因素与至少一个选择标准进行比较。 下一步骤包括响应于选择标准和调制方案来选择通信模式。 下一步包括使用调制方案在所选择的通信模式下进行发送。

公开(公告)号：WO2007040985A3

公开(公告)日：2007-11-15

申请号：PCT/US2006036477

申请日：2006-09-19

Applicant: MOTOROLA INC ,  TAN JUN ,  GHOSH AMITAVA ,  WANG FAN

Inventor： TAN JUN ,  GHOSH AMITAVA ,  WANG FAN

IPC: H04K1/10

CPC classification number: H04L5/0048 ,  H04L5/0016 ,  H04L25/0226 ,  H04L25/03159 ,  H04L27/2613 ,  H04L2025/03414

Abstract: Various embodiments are described to provide for the transmission of data in an improved manner. Data transmission is improved by including in a transmitter a null generator (310) to embed frequency domain nulls into a data symbol sequence to produce a null-embedded data symbol sequence. A symbol inserter (320) inserts a control symbol sequence into the frequency domain nulls of the null-embedded data symbol sequence to produce a combined symbol sequence. A modulator (330) then encodes the combined symbol sequence using IFDMA / DFT-S-OFDM. This approach allows the assignment of a single IFDMA / DFT-S-OFDM code to each user for data and control (pilot, e.g.) signaling, simplifying code management. Frequency hopping techniques may also be employed to lower the pilot overhead.

Abstract translation: 描述了各种实施例以提供以改进的方式传输数据。 通过在发射机中包括空生成器（310）以将频域零点嵌入到数据符号序列中以产生空嵌入的数据符号序列来改进数据传输。 符号插入器（320）将控制符号序列插入到零嵌入数据符号序列的频域空值中以产生组合符号序列。 然后，调制器（330）使用IFDMA / DFT-S-OFDM对组合符号序列进行编码。 该方法允许将单个IFDMA / DFT-S-OFDM码分配给每个用户进行数据和控制（导频信号），从而简化码管理。 也可以采用跳频技术来降低导频开销。

公开(公告)号：WO2008042527A3

公开(公告)日：2008-12-11

申请号：PCT/US2007076862

申请日：2007-08-27

Applicant: MOTOROLA INC ,  WANG FAN ,  BENES STANLEY J ,  GHOSH AMITAVA ,  TAN JUN

Inventor： WANG FAN ,  BENES STANLEY J ,  GHOSH AMITAVA ,  TAN JUN

IPC: H04B1/00 ,  H04B7/00

CPC classification number: H01Q3/30 ,  H01Q3/2605 ,  H04B7/0634 ,  H04B7/0636 ,  H04L5/14 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/03343 ,  H04L2025/03426

Abstract: A subscriber unit (104) with multiple receive antennas (160, 162) and a single transmit antenna (160) derives beamforming weights to be used at a base station (102) with multiple transmitting antennas (602, 604, 606, and 608). The downlink beamforming weights are derived at the subscriber unit (104) from a prior downlink transmission from the base station (102) to the subscriber device (104) and an uplink sounding signal is used to carry derived downlink beam forming weights to the base station (102). Downlink antenna specific pilots (without weight) are used at the subscriber device (104) to determine the beamforming weights. Decimated sounding signals, where the number of sounding subcarriers is al least the same as the number of antennas at the base station (102), allow multiple users to sound at the same time.

Abstract translation: 具有多个接收天线（160,162）和单个发射天线（160）的用户单元（104）导出要在具有多个发射天线（602,604,606和608）的基站（102）处使用的波束成形权重， 。 下行链路波束形成权重是由用户单元（104）从基站（102）到用户设备（104）的先前下行链路传输导出的，并且上行链路探测信号用于将导出的下行链路波束形成权重传送给基站 （102）。 在用户设备（104）处使用下行链路天线专用导频（没有重量）来确定波束成形权重。 其中探测子载波的数量与基站（102）处的天线的数量至少相同的分样探测信号允许多个用户同时发声。