Title:
MODULATION/DEMODULATION METHOD, MODULATION DEVICE, AND DEMODULATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/125957
Kind Code:
A1
Abstract:
In order to, with respect to a signal modulated by a modulation method in which four kinds of SSB elements are orthogonally disposed around a common carrier frequency domain, suppress intersymbol interference in a time domain when the four kinds of SSB elements are separated at time of demodulation, in a representative embodiment, a first carrier wave tuned to a received signal, and a second carrier wave orthogonal to the first carrier wave are generated, a first signal synchronized with a symbol signal of the received signal, and a second signal obtained by Hilbert transforming the first signal are generated, a first local signal obtained by modulating the first signal by the first carrier wave, a second local signal obtained by modulating the first signal by the second carrier wave, a third local signal obtained by modulating the second signal by the first carrier wave, and a fourth local signal obtained by modulating the second signal by the second carrier wave are generated, and the received signal is demodulated by being detected by the first to fourth local signals.
Inventors:
OHTA GENICHIRO (JP)
SATO TAKURO (JP)
SATO TAKURO (JP)
Application Number:
PCT/JP2015/055001
Publication Date:
August 27, 2015
Filing Date:
February 23, 2015
Export Citation:
Assignee:
UNIV WASEDA (JP)
International Classes:
H04L27/02; H03D1/24; H04L27/04; H04L27/06
Domestic Patent References:
| WO2005011223A1 | 2005-02-03 |
Foreign References:
| JP2010010918A | 2010-01-14 | |||
| JPH11239189A | 1999-08-31 | |||
| JP2013090043A | 2013-05-13 | |||
| JP2010068177A | 2010-03-25 | |||
| US6091781A | 2000-07-18 |
Other References:
DAISUKE IKUTA ET AL.: "B-5-176 On SSB Transmission of QPSK Signal", THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS SOGO TAIKAI KOEN RONBUNSHU 2001 NEN TSUSHIN, vol. 1, March 2001 (2001-03-01), pages 574
S. A. MUJTABA: "A novel scheme for transmitting QPSK as a single-sideband signal", GLOBAL TELECOMMUNICATIONS CONFERENCE, GLOBECOM, vol. 1, 1998, pages 592 - 597, XP010339564
GEN'ICHIRO OTA ET AL.: "A Study of Multi-level modulation for SSB-QPSK method : A four-layered SSB-QAM Modulation method", IEICE TECHNICAL REPORT RCS, vol. 113, no. 456, 24 February 2014 (2014-02-24), pages 37 - 42
S. A. MUJTABA: "A novel scheme for transmitting QPSK as a single-sideband signal", GLOBAL TELECOMMUNICATIONS CONFERENCE, GLOBECOM, vol. 1, 1998, pages 592 - 597, XP010339564
GEN'ICHIRO OTA ET AL.: "A Study of Multi-level modulation for SSB-QPSK method : A four-layered SSB-QAM Modulation method", IEICE TECHNICAL REPORT RCS, vol. 113, no. 456, 24 February 2014 (2014-02-24), pages 37 - 42
Attorney, Agent or Firm:
TSUTSUI & ASSOCIATES (JP)
Patent business corporation Tsutsui international patent firm (JP)
Patent business corporation Tsutsui international patent firm (JP)
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