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公开(公告)号:US20090225885A1
公开(公告)日:2009-09-10
申请号:US12418002
申请日:2009-04-03
申请人: Tsuguhide AOKI , Ichiro SETO , Daisuke TAKEDA , Takehiko TOYODA , Ren SAKATA , Yoshimasa EGASHIRA
发明人: Tsuguhide AOKI , Ichiro SETO , Daisuke TAKEDA , Takehiko TOYODA , Ren SAKATA , Yoshimasa EGASHIRA
IPC分类号: H04J11/00
CPC分类号: H04L27/2611 , H04B7/06 , H04B7/0617 , H04B7/08 , H04B7/10 , H04J11/0036 , H04L1/1829 , H04L5/0023 , H04L5/0048 , H04L5/023 , H04L25/0226 , H04L27/2613 , H04L27/2626 , H04L27/2647 , H04W84/12
摘要: An orthogonal frequency division multiplexing (OFDM) signal transmission apparatus which transmits OFDM signals by using a plurality of transmission antennas includes a subcarrier setting device which sets signals for subcarriers so as to use some of the subcarriers of the OFDM signals as pilot subcarriers to transmit pilot signals and use the remaining subcarriers as data subcarriers to transmit data signals, the subcarrier setting device changing polarities of signals for the pilot subcarriers for each transmission antenna.
摘要翻译: 通过使用多个发送天线发送OFDM信号的正交频分多路复用(OFDM)信号发送装置包括:副载波设定装置,其对副载波设定信号,使用OFDM信号的一部分副载波作为导频子载波,发送导频 信号,并且使用剩余的子载波作为数据子载波来发送数据信号,副载波设置装置改变每个发射天线的导频子载波的信号的极性。
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公开(公告)号:US20100040167A1
公开(公告)日:2010-02-18
申请号:US12604712
申请日:2009-10-23
申请人: Tsuguhide AOKI , Ichiro SETO , Daisuke TAKEDA , Takehiko TOYODA , Ren SAKATA , Yoshimasa EGASHIRA
发明人: Tsuguhide AOKI , Ichiro SETO , Daisuke TAKEDA , Takehiko TOYODA , Ren SAKATA , Yoshimasa EGASHIRA
IPC分类号: H04B7/02
CPC分类号: H04L27/2611 , H04B7/06 , H04B7/0617 , H04B7/08 , H04B7/10 , H04J11/0036 , H04L1/1829 , H04L5/0023 , H04L5/0048 , H04L5/023 , H04L25/0226 , H04L27/2613 , H04L27/2626 , H04L27/2647 , H04W84/12
摘要: An orthogonal frequency division multiplexing (OFDM) signal transmission apparatus which transmits OFDM signals by using a plurality of transmission antennas includes a subcarrier setting device which sets signals for subcarriers so as to use some of the subcarriers of the OFDM signals as pilot subcarriers to transmit pilot signals and use the remaining subcarriers as data subcarriers to transmit data signals, the subcarrier setting device changing polarities of signals for the pilot subcarriers for each transmission antenna.
摘要翻译: 通过使用多个发送天线发送OFDM信号的正交频分多路复用(OFDM)信号发送装置包括:副载波设定装置,其对副载波设定信号,使用OFDM信号的一部分副载波作为导频子载波,发送导频 信号,并且使用剩余的子载波作为数据子载波来发送数据信号,副载波设置装置改变每个发射天线的导频子载波的信号的极性。
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公开(公告)号:US20080212704A1
公开(公告)日:2008-09-04
申请号:US12060647
申请日:2008-04-01
申请人: Ichiro SETO , Tsuguhide Aoki , Hiroshi Yoshida
发明人: Ichiro SETO , Tsuguhide Aoki , Hiroshi Yoshida
IPC分类号: H04L27/28
CPC分类号: H04L5/0048 , H04L1/06 , H04L5/0023 , H04L5/0064 , H04L25/0204 , H04L25/0226 , H04L27/0008
摘要: In a wireless transmitting device which performs transmission by an OFDM using a plurality of subcarriers orthogonal to each other, a plurality of preambles to which a plurality of different subcarrier groups selected from a plurality of subcarriers within an OFDM signal band are allocated are transmitted by using a plurality of transmit antennas, and data is transmitted by using the antennas after the preambles are transmitted.
摘要翻译: 在通过使用彼此正交的多个子载波进行OFDM的传输的无线发送装置中,通过使用分配了从OFDM信号频带内的多个子载波中选择的多个不同子载波组的多个前同步码 多个发送天线,并且在发送前导码之后通过使用天线来发送数据。
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公开(公告)号:US20070224960A1
公开(公告)日:2007-09-27
申请号:US11750598
申请日:2007-05-18
IPC分类号: H04B1/06
CPC分类号: H03G3/3068 , H03D3/008 , H04B1/30 , H04L27/3809
摘要: A radio receiver comprises a first amplifier to amplify a received radio signal; a quadrature demodulator to demodulate the radio signal amplified by said first amplifier and thereby generate a baseband signal; a second amplifier to amplify the baseband signal; a demodulator to demodulate the baseband signal amplified by said second amplifier; and a gain controller to control timing of a change in a gain of said second amplifier, in case that changing the gain of said first amplifier and the gain of said second amplifier, on the basis of a gain of said first amplifier before and after the change.
摘要翻译: 无线电接收机包括:放大接收的无线电信号的第一放大器; 正交解调器,用于解调由所述第一放大器放大的无线电信号,从而产生基带信号; 第二放大器,用于放大基带信号; 解调器,用于解调由所述第二放大器放大的基带信号; 以及增益控制器,用于在根据所述第一放大器的增益前后改变所述第一放大器的增益和所述第二放大器的增益的情况下,控制所述第二放大器的增益变化的定时 更改。
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