In comparison, conventional, or singleuser mimo considers only local device multiple antenna dimensions. Multi user mimo technology explained mu mimo netgear nighthawk wifi routers. Multiuser mimo algorithms are developed to enhance mimo systems when the number of users or connections is greater than one. What is mumimo, and why should your router have it.
View multi user mimo communication research papers on academia. These antennas contain two or more rf connectors, which each connect to a different antenna within the radome. Since 2006, several companies such as broadcom and intel have introduced a novel communication technique based on the mimo technology for improving the. Using multi user multi input multi output technology, netgear nighthawk smart wireless routers can. In this paper, two receivers are proposed for a multiple input multiple output mimo relaying multi hop communication system using a khatrirao spacetime krst coding at the source and amplify. Page 7 understanding the basics of mimo communication technology. This decreases the time each device has to wait for a signal and dramatically speeds up your network. An overview on resource allocation techniques for multiuser. Sumimo single user, multiple input, multiple output is older.
Mumimo mac protocols for wireless local area networks arxiv. What is mu mimo and why you need it in your wireless routers mu mimo which stands for multi user, multiple input, multiple output was created to support environments where multiple users are. Multiuser mimo maturing mimo, multipleinput multiple output, technologyrelies on multiple antennas to simultaneously transmit multiple streams of data in wireless communication systems. Multiuser, multipleinput, multipleoutput technologybetter known as mumimo a. Mimo technology in wifi systems stanford university. Study paper on multipleinput multipleoutput mimo technology. Multiuser mimo mumimo systems are increasingly viewed as attractive complementaryalternative technologies to singleuser mimo systems for forwardlink. Nextgen ac or ac wave 2allows a wifi router to communicate with multiple devices simultaneously.
Mimo technology uses multiple radios to transfer more data at the same time mimo technology leverages multipath behavior by using multiple, smart transmitters and receivers with an added spatial dimension to dramatically increase performance and range. Multiuser multipleinput and multipleoutput mumimo, introduced by ieee 802. Mimo allows multiple antennas to send and receive multiple spatial streams at the same time. When mimo is used to communicate with several terminals at the same time, we speak of multiuser mimo. What is mumimo and why you need it in your wireless routers. Mimo systems constructively explore multipath propagation using different transmission paths to the receiver to improve wireless systems capacity. Of course this required new lines of router with multiple antennas.
Multiuser mimo technology explained mumimo netgear. Massive multi user mu multiple input multiple output mimo will be a core technology in fifthgeneration 5g wireless systems as it offers significant improvements in spectral efficiency compared to existing multi antenna technologies. Functionally equivalent to tm4 w codebook restriction to. Index termsdownlink transmission, multiuser mimo, pre coding, resource allocation, spatial multiplexing, user scheduling. Techniques for multiuser mimo with twoway training ieee xplore. These are often designed with a slant left and slant right polarization, with each element offset 90 degrees. The su standard allowed routers to send and receive multiple streams of data at the same time, based on the number of antennas it had.
Using multi user multiple input, multiple output mu mimo technology, a wireless routers can transmit to and receive data from multiple wifi devices at the same time. B the multicell multiuser mimo uplink with very large antenna. An mimo system can increase the channel capacity and improves reliability without sacrificing spectrum efficiency or consuming additional transmitted power 3. Pdf in recent years, the remarkable promise of multipleantenna techniques has motivated an intense research activity devoted to characterizing the. Multiantenna products contained within a single radome. As a result of the use of multiple antennas, mimo wireless technology is able to considerably increase the capacity of a given channel. Poorly defined in terms of demod no reliable means of mu mimo detection and csf, not used in practice. Mimo wireless communication 100 channel matrix, lincoln laboratory journal volume 15, number 1, 2005 x is the transmitarray vector, and n is zeromeancomplex gaussian noise. Multiuser mimo communication research papers academia. Understanding the basics of mimo communication technology. Conventional mimo systems are composed of randomly distributed multiple antenna bss, where each bs is serving a certain number of users. The presence of hundreds of antenna elements at the base station bs, however, results in. Multiuser mimo mumimo can leverage multiple users as spatially distributed transmission resources, at the cost of somewhat more expensive signal processing.
1499 988 1117 1273 1147 1449 744 205 1429 1512 1177 575 1447 1063 145 1370 695 35 509 1266 94 119 1051 1105 1398 795 359 1333