4G/5G/Cellular | Microwave Journal

Beyond Next Generation Mobile Broadband: BuNGee

January 15, 2012

Design of a multi-beam antenna to be deployed in the BuNGee communications project using dual polar, beam forming technology

The CTIA Wireless 2011 MIMO OTA Expert Forum

December 14, 2010

David Vye

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Understanding MIMO OTA Testing:
CTIA Wireless MIMO Expert Forum
The MIMO Expert Forum at CTIA 2011, provides an understanding of system performance and presents the core elements that facilitate systematic and repeatable performance measurement of MIMO devices. This event is free to all CTIA 2011 Attendees. Presented by ETS-Lindgren, Agilent, Elektrobit, and Spirent. Organized by RF/Microwave Zone and Microwave Journal.

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The Masters of MIMO

Expert Advice: August 2012

August 10, 2010

SATIMO (Nicolas Gross. Alessandro Scannavini and Meryam Abou el Anouar) MI Technologies (Derek Skousen)

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This month, we asked several of our contributing experts to "The Masters of MIMO" August cover story to respond to audience questions from our last webinar on MIMO. Below are the individual replies from repesentatives from SATIMO (Microwave Vision Group) and MI Technologies.

Bridging the Gap between MIMO Lab and Field Test Results

August 7, 2010

Azimuth Systems, Acton, Mass.

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Testing mobile devices involves many phases, including the validation of the devices in the actual field conditions where subscribers will use them. However, field testing in the diverse conditions of terrain, population density, physical location and motion of devices is extremely time-consuming and costly. As the wireless industry works...

Creating a Complex Multipath Environment Simulation in an Anechoic Chamber

August 6, 2010

Michael D. Foegelle, ETS-Lindgren

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Techniques for measuring over-the-air (OTA) performance of wireless devices with single antennas do not work as well for multiple antennas because they assume that the radiation pattern of the device is fixed such that the measured result is a snapshot of the device performance at any given instant in...

Embracing Complexity: MIMO Over-the-Air Testing with the Reverberation Chamber

August 6, 2010

Derek Skousen, MI Technologies; Charlie Orlenius, Bluetest

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This article describes a repeatable reference environment for over-the-air (OTA) testing of multiple input multiple output (MIMO) devices and why the reverberation chamber is uniquely suited to provide insight into MIMO device performance. The importance of reference environments and the characteristics of the reverberation chamber in the context of...

Dynamic Correlation in Virtual Drive Testing

August 6, 2010

Madhu Gurumurthy, Spirent Communications

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One of the least-understood aspects of the real-world RF environment is the effect of real-time motion on radio receivers. This becomes especially interesting in modern radio technologies, which are quickly converging on Multiple-In Multiple-Out (MIMO) antenna techniques as a means of increasing data rates without sacrificing temporal or spectral...

The MIMO Antenna: Unseen, Unloved, Untested!

August 5, 2010

Moray Rumney, Agilent Technologies Inc.

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Multiple input/multiple output (MIMO) systems have shifted from theory through design to development and are now entering the testing and deployment phases. The MIMO articles in this issue are focused on performance testing in real world conditions, which is the validation of MIMO performance that the industry has long...

EB Launches MIMO OTA Emulator

March 1, 2010

EB

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EB (Elektrobit) has announced what is claimed to be the industry's first commercially available Multiple-Input-Multiple-Output (MIMO) Over-the-Air (OTA) emulator to increase the performance and data rate of MIMO mobile terminals. Previously, the company delivered a custom solution for LG Electronics and now is making it commercially available for other...

Developing Strategies for MIMO Testing

March 11, 2009

Ron Rausch and Mark Buffo, Keithley Instruments Inc., Cleveland, OH

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Increased data throughput is critical to the success of future mobile wireless services that promise reliable voice, data and video access. Although the data throughput of a communications channel can be increased by increasing the channel’s bandwidth, bandwidth is generally licensed and limited. A more practical approach lies in...

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