Title:
通信装置
Document Type and Number:
Japanese Patent JP5236829
Kind Code:
B2
Abstract:
Improving the accuracy of estimation of channel responses in receiving signals from a plurality of antennas is disclosed. A transmitting device of a base station includes a preamble A generating unit 010, a preamble B generating unit 011, phase rotating units 012 and 013, multiplexing units 014 and 015, an forward error correction coding unit 016, an S/P converting unit 017, a mapping unit 018, a changeover switch 019, IDFT (or IFFT) units 020 and 026, P/S converting units 021 and 027, GI (Guard Interval) inserting units 022 and 028, D/A converting units 023 and 029, radio transmitting units 024 and 030 and antenna units 025 and 031. In the preamble A generating unit 010 and the preamble B generating unit 011, a preamble A and a preamble B (see the packet format in Figure 1) are generated, respectively. The preamble A is outputted to the multiplexing units 014 and 015, while the preamble B is outputted to the phase rotating units 012 and 013. The phase rotating units 012 and 013 to which the preamble B has been inputted give continuous phase rotation to subcarriers of the preamble B. In the transmitting device of the base station according to this embodiment, the phase rotating unit 012 does not give phase rotation, but only the phase rotating unit 013 gives phase rotation to the preamble B.
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Inventors:
Shinpei Fuji
Yasuhiro Hamaguchi
Hideo Namba
Seiichi Sampei
Hiroshi Harada
Masafumi Moriyama
Yasuhiro Hamaguchi
Hideo Namba
Seiichi Sampei
Hiroshi Harada
Masafumi Moriyama
Application Number:
JP2012198196A
Publication Date:
July 17, 2013
Filing Date:
September 10, 2012
Export Citation:
Assignee:
Sharp Corporation
National University Corporation Osaka University
National Institute of Information and Communications Technology
National University Corporation Osaka University
National Institute of Information and Communications Technology
International Classes:
H04J11/00; H04B7/04; H04B7/06; H04J99/00
Domestic Patent References:
| JP2006101501A | ||||
| JP2006050573A | ||||
| JP2007525097A | ||||
| JP2006054661A | ||||
| JP2008511221A | ||||
| JP2005354708A | ||||
| JP2007529972A | ||||
| JP2007523550A |
Foreign References:
| WO2005081480A1 | ||||
| WO2006001898A1 | ||||
| WO2005122516A1 | ||||
| WO2005117321A1 |
Other References:
Dammann, A. 他,Beamforming in combination with space-time diversity for broadbandOFDM systems,Communications, 2002. ICC 2002. IEEE International Conference on,2002年,vol.1,pp.165-171
Kaiser, S.,Spatial transmit diversity techniques for broadband OFDM systems,Global Telecommunications Conference, 2000. GLOBECOM '00. IEEE,2000年,vol.3,pp.1824-1828
Kaiser, S.,Spatial transmit diversity techniques for broadband OFDM systems,Global Telecommunications Conference, 2000. GLOBECOM '00. IEEE,2000年,vol.3,pp.1824-1828
Attorney, Agent or Firm:
Yusuke Hiraki
Toshiaki Watanabe
Kenichi Imamura
Toshiaki Watanabe
Kenichi Imamura