Title:
MIMO OFDM SYSTEM
Document Type and Number:
Japanese Patent JP3664993
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a MIMO OFDM system which uses an independent space- time code for each of many transmission antenna sets.
SOLUTION: The MIMO OFDM system is provided with a plurality of space- time encoders for encoding each data block assigned with an independent space- time code. Converted data block signals are transmitted by a plurality of transmission antennas, and then are received by a plurality of receiving antennas. Prior to the maximum likelihood estimation, the received data is subjected to a prewhitening process. In one example of implementation, the performance of the system can be improved by using continuous interference offset. Channel parameter estimators can be improved by weighting estimated values of channel impulse response based on the deviation from the mean.
Inventors:
E Lee
Nelson Ray Saulberger
Jack harriman winters
Nelson Ray Saulberger
Jack harriman winters
Application Number:
JP2001151779A
Publication Date:
June 29, 2005
Filing Date:
May 22, 2001
Export Citation:
Assignee:
AT&T CORP.
International Classes:
H04J11/00; H04B7/06; H04B7/08; H04J99/00; H04L1/06; H04L27/26; (IPC1-7): H04J15/00; H04B7/06; H04B7/08; H04J11/00
Domestic Patent References:
| JP8265184A |
Foreign References:
| WO1998009381A1 | ||||
| WO1999045657A1 |
Other References:
ISHII N. et.al.,Spatially and Temporally Joint Transmitter - Recdeiver Using an Adaptive Array Antenna,IEICE Trans. on Commun.,1996年 3月,Vol.E79-B, No.3,p.361-367
西村 寿彦,空間領域マルチステージ干渉キャンセラを適用したSDMA方式の特性評価,電子情報通信学会技術研究報告,1999年10月15日,Vol.99,No.357,pp.103-108,RCS99-136
Ye Li et.al.,Channel estimation for OFDM systems with transmitter diversity in mobile wireless channels,IEEE Journal on Selected Areas in Communications,米国,1999年 3月,Volume: 17, Issue: 3,461-471
Lozano A. et.al.,Space-time receiver for wideband BLAST in rich-scattering wireless channels,Vehicular Technology Conference Proceedings 2000,IEEE,2000年 5月18日,vol.1,pp.186-190,VTC2000-Spring
吉井 勇,アダプティブアレーアンテナによる適応形時空間最適受信機の一検討,1999年電子情報通信学会総合大会講演論文集,1999年 3月 8日,通信1,p.396,B-5-45
Dakshi Agrawal et.al.,Space-Time Coded OFDM for High Data-Rate Wireless Communication Over Wideband Channels,Vehicular Technology Conference 1998,IEEE,1998年 5月21日,Vol.3,pp.2232-2236
山田 洋治郎 外3名,同一チャネル干渉環境におけるMIMO-OFDM最尤受信方式,電子情報通信学会技術研究報告,2003年 8月21日,Vol.103, No.253,pp.13-18,RCS2003-112
西村 寿彦,空間領域マルチステージ干渉キャンセラを適用したSDMA方式の特性評価,電子情報通信学会技術研究報告,1999年10月15日,Vol.99,No.357,pp.103-108,RCS99-136
Ye Li et.al.,Channel estimation for OFDM systems with transmitter diversity in mobile wireless channels,IEEE Journal on Selected Areas in Communications,米国,1999年 3月,Volume: 17, Issue: 3,461-471
Lozano A. et.al.,Space-time receiver for wideband BLAST in rich-scattering wireless channels,Vehicular Technology Conference Proceedings 2000,IEEE,2000年 5月18日,vol.1,pp.186-190,VTC2000-Spring
吉井 勇,アダプティブアレーアンテナによる適応形時空間最適受信機の一検討,1999年電子情報通信学会総合大会講演論文集,1999年 3月 8日,通信1,p.396,B-5-45
Dakshi Agrawal et.al.,Space-Time Coded OFDM for High Data-Rate Wireless Communication Over Wideband Channels,Vehicular Technology Conference 1998,IEEE,1998年 5月21日,Vol.3,pp.2232-2236
山田 洋治郎 外3名,同一チャネル干渉環境におけるMIMO-OFDM最尤受信方式,電子情報通信学会技術研究報告,2003年 8月21日,Vol.103, No.253,pp.13-18,RCS2003-112
Attorney, Agent or Firm:
Masao Okabe
Nobuaki Kato
Kazuo
Shinichi Usui
Ikuo Fujino
Takao Ochi
Teruhisa Motomiya
Norimichi Takanashi
Asahi Shinmitsu
Seiichiro Takahashi
Koji Yoshizawa
Nobuaki Kato
Kazuo
Shinichi Usui
Ikuo Fujino
Takao Ochi
Teruhisa Motomiya
Norimichi Takanashi
Asahi Shinmitsu
Seiichiro Takahashi
Koji Yoshizawa