公开(公告)号：EP1489868A1

公开(公告)日：2004-12-22

申请号：EP03705284.2

申请日：2003-02-18

申请人： SHARP KABUSHIKI KAISHA

发明人： OKAMOTO, Naoki ,  MORINAGA, Norihiko ,  SANPEI, Seiichi

IPC分类号： H04Q7/36

CPC分类号： H04L5/0046 ,  H04L5/0007 ,  H04L5/006

摘要： A TDMA radio communication system using a multiple subcarrier modulation method and comprising at least a first and a second radio station. The first radio station carries out communications by selectively modulating a subcarrier with which a desired transmission rate can be obtained in the second radio station, thereby providing a radio communication system that does not require the monitoring of each time slot by a terminal.

摘要翻译： 一种TDMA无线电通信系统，使用多个副载波调制方法并且至少包括第一和第二无线电台。 第一无线电台通过选择性地调制可以在第二无线电台中获得期望传输速率的副载波来执行通信，由此提供无需通过终端监视每个时隙的无线电通信系统。

公开(公告)号：EP1748591A1

公开(公告)日：2007-01-31

申请号：EP05736744.3

申请日：2005-04-27

申请人： SHARP KABUSHIKI KAISHA

发明人： MATSUSHITA, Yoshiteru ,  SANPEI, Seiichi

IPC分类号： H04J11/00

CPC分类号： H04L27/2647 ,  H04L1/0003 ,  H04L27/2602

摘要： Improvement of transmission efficiency is sought by stopping transmission of unnecessary MLI data.
A transmitting circuit 111 in a base station apparatus 110 has an MLI modulation part 248 composed of an MLI generating circuit 238, a symbol modulation circuit 239, and an IFFT circuit 240, a user data modulation part 249 composed of an encoder circuit 234, a symbol modulation circuit 235, a transmission power control circuit 236, and an IFFT circuit 237, and a transmission operation control circuit 113. The transmission operation control circuit 113 controls operation timing of the MLI modulation part 248, the user data modulation part 249, and a multiplexer 243 based on a signal to notify that ACK input from a receiving circuit 112 has been received so that slots containing no MLI data are generated.

摘要翻译： 通过停止传输不必要的MLI数据来寻求传输效率的提高。 基站装置110中的发送电路111具有由MLI生成电路238，符号调制电路239和IFFT电路240构成的MLI调制部248，由编码器电路234构成的用户数据调制部249， 符号调制电路235，发送功率控制电路236，IFFT电路237以及发送动作控制电路113.发送动作控制电路113控制MLI调制部248，用户数据调制部249和 已经接收到基于用于通知从接收电路112输入的ACK的信号的多路复用器243，从而生成不包含MLI数据的时隙。

公开(公告)号：EP1494379A1

公开(公告)日：2005-01-05

申请号：EP03707056.2

申请日：2003-02-25

申请人： Sharp Kabushiki Kaisha

发明人： OKAMOTO, Naoki ,  MORINAGA, Norihiko ,  SANPEI, Seiichi

IPC分类号： H04J11/00

CPC分类号： H04L27/2608 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/06

摘要： A TDMA radio communication system uses a multiple sub-carrier modulation method. The TDMA radio communication system comprises at least a first and a second radio station. The second radio station selects only those sub-carriers capable of providing a transmission rate not less than a predetermined value in the first radio station, on the basis of the reception conditions of each sub-carrier of said first radio station. The second radio station then modulates the selected sub-carriers using a modulation level or a coding rate in accordance with the reception conditions of the sub-carriers so as to perform communication, thereby obtaining a desired transmission rate while controlling interface to other stations.