Title:
SPATIAL DIVISION MULTIPLEXING FOR MIMO DEVICES
Document Type and Number:
WIPO Patent Application WO/2005/109723
Kind Code:
A2
Abstract:
A communications system, comprising a transmitter and a receiver, are operable to communicate information using a spatial multiplexing method. The transmitter is operable to separate data to be transmitted into two categories, Alamouti encoding the symbols of the first category and transmitting them on an even number of antennae, and not encoding the second category of symbols, but merely using a modulation scheme such as QAM, and transmitting them on one or more further antennae. A corresponding receiver is operable to successively detect signal components received on corresponding spatially displaced antennae, and then to determine an estimated channel response from the signal components. A weighting function is then derived to extract a stream of data from the received signal, which, on the basis that the Alamouti STBC encoded signal will have the highest signal to noise ratio, will normally be the latter, while other data not encoded according to Alamouti is detected thereafter.
Inventors:
SUN YONG (GB)
TAN HWA SIN (GB)
TAN HWA SIN (GB)
Application Number:
PCT/JP2005/008812
Publication Date:
November 17, 2005
Filing Date:
May 09, 2005
Export Citation:
Assignee:
TOSHIBA KK (JP)
SUN YONG (GB)
TAN HWA SIN (GB)
SUN YONG (GB)
TAN HWA SIN (GB)
International Classes:
H04B7/04; H04B7/06; H04B7/08; H04J99/00; H04L1/06; H04L1/00; (IPC1-7): H04L1/06; H04B7/06; H04B7/08
Foreign References:
| US20030139139A1 | 2003-07-24 | |||
| US20040202257A1 | 2004-10-14 |
Other References:
PRASAD N ET AL INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS: "Optimum efficiently decodable layered space-time block codes" CONFERENCE RECORD OF THE 35TH. ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS, & COMPUTERS. PACIFIC GROOVE, CA, NOV. 4 - 7, 2001, ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS AND COMPUTERS, NEW YORK, NY : IEEE, US, vol. VOL. 1 OF 2. CONF. 35, 4 November 2001 (2001-11-04), pages 227-231, XP010580922 ISBN: 0-7803-7147-X
Attorney, Agent or Firm:
Suzuye, Takehiko c/o SUZUYE & SUZUYE (1-12-9 Toranomo, Minato-ku Tokyo, JP)
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