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ZDNet Dictionary Definition
- MIMO
- (Multiple Input/Multiple Output) Pronounced "my-mo," it is the use of multiple transmitters and receivers multiple antennas on wireless devices for improved performance. When two transmitters and two or...
- Full MIMO Definition >>
ZDNet Resources
- The Hidden Cost of Overhead in MIMO Wireless LANs
- Multiple Input Multiple Output MIMO communication, enabled by the presence of multiple transmit and receive antennas in the communication link, is a physical layer technology that can improve throughput in WLANs. The cost of MIMO in terms of additional overhead, unfortunately, is often overlooked. Using representative physical and MAC models,...
- Tags: Throughput, Overhead, MAC, MIMO, Workforce Management, Human Resources
- White papers 2007-05-07
- A Practical Guide to WiMAX Antennas: MIMO and Beamforming Technical Overview
- Wireless operators are increasingly pressured to enhance their networks and service capabilities in order to keep pace with the accelerating growth in wireless utilization and increasing demand for high performing connections. As bandwidth intensive, rich media applications are introduced, larger volumes of subscribers consume ever-growing quantities of data packets while...
- Tags: WiMAX, Mobility, MIMO, Motorola Inc., Wireless Operator, Wi-Fi, Wireless
- White papers 2007-04-13
- Linear Precoding for Multiuser MIMO-OFDM Systems
- This paper develops linear precoding schemes for the downlink in multiuser Multiple-Input Multiple-Output MIMO Orthogonal Frequency Division Multiplexing OFDM systems with multiple data streams per user. The authors extend an existing multiuser MIMO algorithm, that jointly optimizes the power allocation and the transmit and receive filters, to MIMOOFDM systems. One...
- Tags: MIMO, Allocation, MIMO-OFDM, University Of Toronto, OFDM, Wireless
- White papers 2006-09-28
- Rapid MIMO-OFDM Software Defined Radio System Prototyping
- Multiple Input-Multiple Output MIMO is an attractive technology for future wireless systems. MIMO communication, enabled by the use of multiple transmit and multiple receive antennas, is known for its high spectral efficiency as well as its robustness against fading and interference. Combining MIMO with Orthogonal Frequency Division Multiplexing OFDM, it...
- Tags: Radio, MIMO, MIMO-OFDM, OFDM, Wireless
- White papers 2006-06-20
- 802.11n- A case of "Finding MIMO?"
- Behold the futurists among us, for they have hope.They see a world where the IEEE 802.11n standard is ingrained in all portable communications devices, and allows "Warp Factor 5 Mr. Sulu" communications.Well, maybe not Warp Factor 5, but 540 MB a second- more than 100 times faster than 802.11b...
- Tags: IEEE 802.11n
- Blog posts 2006-05-04
- Linksys WRT54GX2 Wireless-G router with SRX200
- If you require more throughput and range than standard 802.11b/g routers provide but don't need to cover the entire neighborhood with a far-reaching router, Linksys's WRT54GX2 Wireless-G router with SRX200 can save you some bucks while still offering decent MIMO performance. Like the Belkin Wireless-G Plus MIMO router, the WRT54GX2...
- Tags: Belkin Corp., Linksys, Linksys WRT54GX2, MIMO, MIMO Router, router
- Product reviews 2006-03-24
- Antenna Design and Site Planning Considerations for MIMO
- The capacity and reliability of Multiple-Input Multiple-Output MIMO wireless communications systems may be sensitive to the design of the antenna arrays employed at the transmitter and receiver, as well as to the nature of the propagation between the arrays. This paper discusses the emerging methodology of array design for indoor...
- Tags: MIMO, Wi-Fi, Wireless
- White papers 2006-01-05
- Performance Analysis of MIMO NLOS OFDM Broadband Fixed Wireless Access Systems
- The combination of Multiple Input Multiple Output MIMO techniques and Orthogonal Frequency Division Multiplexing OFDM modulation, two powerful technologies in the physical layer design, represents a promising means to provide high-data-rate and high-quality wireless access in presence of Non Line Of Sight NLOS propagation. This paper focuses on performance evaluation...
- Tags: Performance, MIMO, Wireless Access, Wi-Fi, Wireless
- White papers 2005-12-14
- The tortoise or the hare for Wi-Fi?
- The never ending quest for speed has brought about the need for a new high-speed wireless LAN standard called 802.11n. MIMO Multiple In Multiple Out based wireless data transmission technology is the technology behind the new 802.11n standard but MIMO means different things to different companies that are...
- Tags: Smart-Antenna, MIMO, Ruckus Wireless
- Blog posts 2005-12-12
- Wireless MIMO shootout Round II
- Wireless MIMO shootout Round IIMIMO / WiMAX I said!Don't MIMO! WiMAX it!:http://en.wikipedia.org/wiki/WiMAXThanks GO for a good article.MIMO QuestionsWhy aren't we talking about what the EWC is delivering in their breakaway from 802.11n group.?Is the Atheros MIMO like 2nd generaiton product all this group has to offer ?How long can Intel...
- Tags: Wi-Fi, Thre, wireless, WiMAX, Speakeasy, MIMO
- Discussion threads 2005-12-01
- Wireless MIMO shootout Round II
- Our old friend Tim Higgins is at it again with this massive MIMO face-off and he looks at the second generation of "pre-N" MIMO products. Tim looks at a wide range of products and I highly recommend anyone looking for high-performance long-range Wi-Fi gear to read Tim's review before...
- Tags: MIMO, Atheros Communications
- Blog posts 2005-12-01
- Multimode Precoding for MIMO Wireless Systems
- Multiple-Input Multiple-Output MIMO wireless systems obtain large diversity and capacity gains by employing multielement antenna arrays at both the transmitter and receiver. The theoretical performance benefits of MIMO systems, however, are irrelevant unless low error rate, spectrally efficient signaling techniques are found. This paper proposes a new method for designing...
- Tags: Transmitter, MIMO, Idea
- White papers 2005-10-01
- A High-Speed Four-Transmitter Four-Receiver MIMO OFDM Testbed: Experimental Results and Analyses
- By adopting Multiple-Input Multiple-Output MIMO and Orthogonal Frequency-Division Multiplexing OFDM technologies, indoor wireless systems could reach data rates up to several hundreds of Mbits/s and achieve spectral efficiencies of several tens of bits/Hz/s, which are unattainable for conventional single-input single-output systems. The enhancements of data rate and spectral efficiency come...
- Tags: MIMO, OFDM, Wireless
- White papers 2005-09-01
- The MIMO war rages on!
- The MIMO war rages on!spectrumThe tv portion of the spectrum is set to get released in the next 6 or 7 years, as tv's go digital and are moved out their present headquarters. I understand cisco envisions a wireless network in a portion of that spectrum, so what effect will...
- Tags: MIMO, spectrum
- Discussion threads 2005-06-24
- The MIMO war rages on!
- When I posted the last blog on the fight for the MIMO 802.11n standard, I didn't realize that I was walking in to the middle of a raging war. An anonymous reader going by the name "Basketball Jones" using a hotmail account sent an enraged email blasting me for...
- Tags: MIMO, Mhz, spectrum, Airgo Networks
- Blog posts 2005-06-23
- Is Airgo the uncrowned king of 802.11n MIMO?
- Is Airgo the uncrowned king of 802.11n MIMO?3 channels is ridiculousJust what good is a multiple-channel technology, when you have just 3 channels? If there were 100 channels, then you could do this and NOT interfere with others . . .I wonder if WiMAX will use this technology . ....
- Tags: WIRELESS, Wireless LANs, Wi-Fi, Airgo Networks, Roger, MIMO, IEEE 802.11n, performance, WiMAX
- Discussion threads 2005-06-20
- Is Airgo the uncrowned king of 802.11n MIMO?
- In March of 2005, the war for the 802.11n MIMO Multiple In Multiple Out high-speed wireless LAN standard seemed all but a foregone conclusion for the TGn Sync group since they had achieved a simple majority vote (57%) of attendees at the Institute of Electrical and Electronic Engineers 802.11n task...
- Tags: True MIMO, Airgo Networks, MIMO
- Blog posts 2005-06-20
- Hermitian Optimization and Scalable VLSI Architecture for Circulant Approximated MIMO Equalizer in CDMA Downlink
- The growing demands for broadband multimedia services, ubiquitous networking via mobile devices push the development of advanced modem technology. Multiple Input Multiple Output MIMO technology using multiple antennas at both the transmitter and receiver has recently emerged as one of the most significant technical breakthroughs in modern communications. On the...
- Tags: Multimedia, Rice University, Optimization, CDMA, MIMO, VLSI, Modems, Cellular Phones, Semiconductors, Hardware, Components, Consumer Electronics, Personal Technology
- White papers 2005-06-06
- An Efficient Circulant MIMO Equalizer for CDMA Downlink: Algorithm and VLSI Architecture
- Wireless communication is experiencing radical advancement to support broadband multimedia services and ubiquitous networking via mobile devices. MIMO Multiple Input Multiple Output technology using multiple antennas at both the transmitter and receiver has emerged as one of the most significant technical breakthroughs for throughput enhancement. This paper presents an efficient...
- Tags: Algorithm, Rice University, CDMA, Wireless Communication, MIMO, VLSI
- White papers 2005-06-05
- MIMO in 3G Cellular Systems: Challenges and Future Directions
- The multidimensional MIMO channel can be exploited to increase the diversity of the system or to provide parallel spatial channels, which is known as spatial multiplexing. Diversity is generally considered lower risk, and a well-known example is space-time codes, which have found adoption in 3G CDMA cellular systems. Diversity increases...
- Tags: MIMO, Diversity, IEEE, 3G, Cellular Phones, Wireless, Consumer Electronics, Personal Technology
- White papers 2005-04-29
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