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：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：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：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。