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vkekk
Joined: 30 Mar 2007
Posts: 178
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 24 Oct 2007 7:06 Clarification for MIMO .... |
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1. Wheather BLAST(Bell Layered Space Time) is a general system or not for MIMO system.
2. If BLAST is a general system , then what is difference between general system and BLAST system in terms of performances in MIMO.
3. What is the relationship between no of transmitting and no of receiver antennas for different categories of MIMO system.
anybody help on these.... urgent for now
Thanks in advance
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m_llaa
Joined: 12 Mar 2006
Posts: 277
Helped: 23
Location: My Love Iran
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24 Oct 2007 16:41 Clarification for MIMO .... |
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Hi
Your question is not clear for me, but I have some comments.
BLAST is a type of space time codes that uses in MIMO systems.
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mro83
Joined: 06 Oct 2004
Posts: 228
Helped: 19
Location: Mashad
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25 Oct 2007 10:34 Clarification for MIMO .... |
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Consider a flat-fading MIMO channel,
V-BLAST is an algorithm to extract the data transmitted by each Tx antenna from the received antenna branches.
So As I know it is an algorithm developed and used in MIMO systems.
[3]: how do you categorize different MIMO systems?
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vkekk
Joined: 30 Mar 2007
Posts: 178
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25 Oct 2007 11:18 Re: Clarification for MIMO .... |
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In some papers, they mentioned BLAST System used for High data rate applications....
In some book, VBLAST is a architecture breaks the orginal data into M substreams that are transmitted on individual antennas. that substream are uncoded version.
Do you have any materials to support BLAST is a algorithm for MIMO System..
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Google
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25 Oct 2007 11:18 Ads |
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mro83
Joined: 06 Oct 2004
Posts: 228
Helped: 19
Location: Mashad
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27 Oct 2007 17:25 Clarification for MIMO .... |
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I cannot give accurate comment based on your readings (cited above).
But generally, MIMO systems are used to increase data rate ( specifically in High data rate applications.... ). Moreover, I think the second citation is the way VBLAST works.
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m_llaa
Joined: 12 Mar 2006
Posts: 277
Helped: 23
Location: My Love Iran
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27 Oct 2007 19:58 Clarification for MIMO .... |
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Hi
Space time coding is the coding type that is used in MIMO system with M antenna in transmitter and N antenna in receiver.
Space time coding have 2 basic category. Just in one of them the target is increasing the data rate. In this category a very famous coding is V-BLAST.
Therefore I think the (V-)BLAST is not system or algorithm. It is a type of coding in MIMO systems.
For more information I suggest you a very good book by Jafarkhani. Its name is Space-Time Coding, Theory and Practice.
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sameerbabu
Joined: 16 Nov 2005
Posts: 98
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31 Oct 2007 12:32 Clarification for MIMO .... |
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| MIMO is not yet a matured technology
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