RADIO TRANSMITTER, RADIO RECEIVER, RADIO SYSTEM, AND RADIO COMMUNICATION METHOD AND PROGRAM THEREOF

Title:

RADIO TRANSMITTER, RADIO RECEIVER, RADIO SYSTEM, AND RADIO COMMUNICATION METHOD AND PROGRAM THEREOF

Document Type and Number:

Japanese Patent JP2006121289

Kind Code:

A

Abstract:

To provide a radio transmitter suppressing disorder of orthogonality of space-time codes due to frequency selectivity when a frequency space transmission diversity system is applied to a two-dimensional diffusion OFEDM-CDM system.

In a radio transmitter 2, a space-time encoder 14 generate space-time code symbols by making inputted data correspond to transmitting antennas on the basis of a space-time encoding matrix. Spreaders 22a-1 to 22a-n when spreading the generated space-time code symbols in two dimensions of a time direction and a frequency direction by using spread codes spreads them so that a spread chip generated from a plurality of space-time code symbols in the time direction of the space-time encoding matrix is allocated to a nearby subcarrier. A conversion transmission part 28a allocates the spread chip to the subcarrier and converts it into a signal of a time region, which is transmitted from a plurality of transmitting antennas 30a and 30b.

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Inventors:

FUJII MASAAKI

Application Number:

JP2004305567A

Publication Date:

May 11, 2006

Filing Date:

October 20, 2004

Export Citation:

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Assignee:

SAMSUNG YOKOHAMA RES INST CO

International Classes:

H04J11/00; H04B1/707; H04B7/06; H04B7/26; H04W72/04

Domestic Patent References:

JP2005072882A	2005-03-17
JP2005012357A	2005-01-13
JP2004200870A	2004-07-15
JP2008507239A	2008-03-06
JP2005253073A	2005-09-15
JP2005110130A	2005-04-21
JP2004328464A	2004-11-18
JP2004253925A	2004-09-09

Foreign References:

WO2002049236A2

2002-06-20

Attorney, Agent or Firm:

Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama

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