Title:
RADIO TRANSMITTING/RECEIVING APPARATUS AND RADIO TRANSMITTING/RECEIVING METHOD FOR ESTIMATING NOISE AND INTERFERENCE POWER IN RATIO TRANSMISSION USING CODE SPREAD
Document Type and Number:
WIPO Patent Application WO/2004/095749
Kind Code:
A1
Abstract:
A radio transmitting/receiving apparatus uses, on the transmitter, pilot symbols that are M-chip spread on the frequency axis and N-chip spread on the time axis by use of spread codes of M times N chips length (where M and N are any integers greater than one), and further uses, on the receiver, spread codes, which are not used for spreading the pilot signals, as despread codes to despread a received signal to estimate nose and interference power, thereby performing a code assignment such that the spread codes used for spreading the pilot symbols are orthogonal to the despread codes used for the despread even with respect to only the N chips on the time axis.
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Inventors:
KAKURA YOSHIKAZU (JP)
YOSHIDA SHOUSEI (JP)
ATARASHI HIROYUKI (JP)
MAEDA NORIYUKI (JP)
YOSHIDA SHOUSEI (JP)
ATARASHI HIROYUKI (JP)
MAEDA NORIYUKI (JP)
Application Number:
PCT/JP2004/005996
Publication Date:
November 04, 2004
Filing Date:
April 26, 2004
Export Citation:
Assignee:
NEC CORP (JP)
NTT DOCOMO INC (JP)
KAKURA YOSHIKAZU (JP)
YOSHIDA SHOUSEI (JP)
ATARASHI HIROYUKI (JP)
MAEDA NORIYUKI (JP)
NTT DOCOMO INC (JP)
KAKURA YOSHIKAZU (JP)
YOSHIDA SHOUSEI (JP)
ATARASHI HIROYUKI (JP)
MAEDA NORIYUKI (JP)
International Classes:
H04B1/692; H04B1/707; H04J11/00; H04J13/00; H04J13/18; H04L5/02; H04W76/02; H04W88/02; H04L27/26; (IPC1-7): H04J11/00
Domestic Patent References:
| WO2003013038A1 | 2003-02-13 |
Foreign References:
| JP2003046474A | 2003-02-14 | |||
| JP2003046481A | 2003-02-14 |
Other References:
SANO, H. ET AL: "Jikan . Shuhasu Kakusan o Okonau Multicarrier CDMA Hoshiki", THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS SOCIETY TAIKAI KOEN RONBUNSHU 1., 7 September 2000 (2000-09-07), pages 378, XP002984764
See also references of EP 1617583A4
See also references of EP 1617583A4
Attorney, Agent or Firm:
Miyazaki, Teruo (16th Kowa Bldg. 9-20, Akasaka 1-chom, Minato-ku Tokyo 52, JP)
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