Bell Laboratories Layered Space-Time 1

Bell Laboratories Layered Space-TimeBell Laboratories Layered Space-Time (BLAST) is a transceiver architecture for offering spatial multiplexingover multiple-antenna wireless communication systems. Such systems have multiple antennas at both the transmitterand the receiver in an effort to exploit the many different paths between the two in a highly-scattering wirelessenvironment. BLAST was developed by Gerard Foschini at Lucent Technologies' Bell Laboratories (nowAlcatel-Lucent Bell Labs). By careful allocation of the data to be transmitted to the transmitting antennas, multipledata streams can be transmitted simultaneously within a single frequency band — the data capacity of the systemthen grows directly in line with the number of antennas (subject to certain assumptions). This represents a significantadvance on current, single-antenna systems.[1]

V-BLASTV-BLAST (Vertical-Bell Laboratories Layered Space-Time) is a detection algorithm to the receipt of multi-antennaMIMO systems.[2] Available for the first time in 1996 at Bell Laboratories in New Jersey in the United States byGerard J. Foschini. He proceeded simply to eliminate interference caused successively issuers.Its principle is quite simple: to make a first detection of the most powerful signal. It regenerates the received signalfrom this user from this decision. Then, the signal is regenerated subtracted from the received signal and, with thisnew sign, it proceeds to the detection of the second user's most powerful, since it has already cleared the first and soforth. What gives a vector containing received less interference.The complete detection algorithm can be summarized as recursive as follows:Initialize:

Recursive:

Bell Laboratories Layered Space-Time 2

References

Further reading• Jankiraman, Mohinder (2004). Space-time codes and MIMO systems (http:/ / books. google. com/

books?id=HU-T7y16AGEC& printsec=frontcover). Artech House.

External links• http:/ / www. alcatel-lucent. com/ wps/ portal/ BellLabs

Article Sources and Contributors 3

Article Sources and ContributorsBell Laboratories Layered Space-Time  Source: http://en.wikipedia.org/w/index.php?oldid=544978529  Contributors: Dima373, Dumelow, Isheden, Isnow, Lawrence Cohen, Leolaursen,Leuko, Markbegbie, Smfield, Splash, Vegaswikian

LicenseCreative Commons Attribution-Share Alike 3.0 Unported//creativecommons.org/licenses/by-sa/3.0/