Mimo Antenna Form
2
Forms of MIMO[edit] Example of an antenna for LTE with 2 port antenna diversity Multi-antenna types[edit] Multi-antenna MIMO or !in"le user MIMO# te$hnolo"y has %een developed and implemented in some standards& e'"'& ()2'**n produ$ts' !I!O+!IMO+MI!O are spe$ial $ases of MIMO Multiple-input and sin"le-output MI!O# is a spe$ial $ase when the re$eiver has a sin"le antenna' !in"le-input and multiple-output !IMO# is a spe$ial $ase when the transmitter has a sin"le antenna' !in"le-input sin"le-output !I!O# is a $onventional radio system where neither transmitter nor re$eiver has multiple antennae' ,rin$ipal sin"le-user MIMO te$hniues .ell La%oratories Layered !pa$e-Time .L/!T#& 0erard' 1' Fos$hini *3# ,er /ntenna 4ate 5ontrol ,/45#& 6aranasi& 0uess *(#& 5hun"& 7uan"& Lo8ano 2))*# !ele$tive ,er /ntenna 4ate 5ontrol !,/45#& Eri$sson 2))9# !ome limitations The physi$al antenna spa$in" is sele$ted to %e lar"e: multiple wavelen"ths at the %ase station' The antenna separation at the re$eiver is heavily spa$e-$onstrained in handsets& thou"h advan$ed antenna desi"n and al"orithm te$hniues are under dis$ussion' 4efer to; multi-user MIMO
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Mimo Antenna Form
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Forms of MIMO[edit]
Example of an antenna for LTE with 2 port antenna diversityMulti-antenna types[edit]Multi-antenna MIMO (or Single user MIMO) technology has been developed and implemented in some standards, e.g., 802.11n products.
SISO/SIMO/MISO are special cases of MIMOMultiple-input and single-output (MISO) is a special case when the receiver has a single antenna.Single-input and multiple-output (SIMO) is a special case when the transmitter has a single antenna.Single-input single-output (SISO) is a conventional radio system where neither transmitter nor receiver has multiple antennae.Principal single-user MIMO techniquesBell Laboratories Layered Space-Time (BLAST), Gerard. J. Foschini (1996)Per Antenna Rate Control (PARC), Varanasi, Guess (1998), Chung, Huang, Lozano (2001)Selective Per Antenna Rate Control (SPARC), Ericsson (2004)Some limitationsThe physical antenna spacing is selected to be large; multiple wavelengths at the base station. The antenna separation at the receiver is heavily space-constrained in handsets, though advanced antenna design and algorithm techniques are under discussion. Refer to: multi-user MIMO
