Title:
TRANSMITTER, RECEIVER, COMMUNICATION METHOD AND TRANSMITTING/RECEIVING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2007/015317
Kind Code:
A1
Abstract:
A zero inserter (3) is used to insert (k - 1) zeros between adjacent data of a complex
baseband signal, thereby placing adjacent (k - 1) copies of the frequency spectrum
of the complex baseband signal as before the zero insertion and further magnifying
the occupied bandwidth of a transport signal as before the zero insertion to k
times (where k ≥ 1). A band limit filter (6), which has a Nyquist bandwidth
that is equal to or longer than kR, is used where T is a time interval between the
adjacent data of the complex baseband signal, T/k is a time interval between the
adjacent data as after the zero insertion, and T = 1/R. A complex signal having
passed through the band limit filter (6) is subjected to a quadrature modulation
and then transmitted. A simple structure can be used to obtain a frequency diversity
effect even in a circumstance of a poor transmission quality.
Inventors:
SAKAI HIDEAKI (JP)
HAYASHI KAZUNORI (JP)
OKADA YOJI (JP)
HAYASHI KAZUNORI (JP)
OKADA YOJI (JP)
Application Number:
PCT/JP2006/303073
Publication Date:
February 08, 2007
Filing Date:
February 21, 2006
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
UNIV KYOTO (JP)
SAKAI HIDEAKI (JP)
HAYASHI KAZUNORI (JP)
OKADA YOJI (JP)
UNIV KYOTO (JP)
SAKAI HIDEAKI (JP)
HAYASHI KAZUNORI (JP)
OKADA YOJI (JP)
International Classes:
H04J11/00; H04B7/06; H04B7/12; H04J1/00
Domestic Patent References:
| WO2002047304A1 | 2002-06-13 |
Foreign References:
| JP2004088421A | 2004-03-18 | |||
| JP2002164801A | 2002-06-07 | |||
| JP2005117581A | 2005-04-28 |
Attorney, Agent or Firm:
INAOKA, Kosaku et al. (Sun Mullion NBF Tower 21st Floor, 6-12, Minamihommachi 2-chome, Chuo-ku, Osaka-sh, Osaka 54, JP)
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