Product category:
Wireless Communications
News Release from: Lyrtech | Subject: Quad dual-band RF transceiver
Edited by the Electronicstalk Editorial
Team on 22 March 2007
Transceiver speeds MIMO system
development
Quad dual-band RF transceiver aids development and optimisation of multiple input multiple output systems operating in the 2.4-5GHz bands.
Lyrtech has developed a quad dual-band RF transceiver as part of a solution dedicated to developing and optimising the signal processing capabilities of multiple input multiple output (MIMO) systems operating in the 2.4-5GHz bands (Wi-Fi, 2.4GHz ISM etc) Today's emerging wireless local area network (WLAN) and home audio/visual (A/V) network technologies are increasingly seeking to reach high datarate wireless communications
This article was originally published on Electronicstalk on 20 Mar 2006 at 8.00am (UK)
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This demand for higher access speeds constitutes a significant research and engineering challenge.
It is in such a context that the IEEE and the ITU are undertaking efforts to integrate MIMO technologies to overcome such a challenge.
Lyrtech's quad dual-band RF transceiver offers a complete MIMO transceiver and a powerful conversion and signal processing solution as a rise to the challenge.
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The quad dual-band RF transceiver is a four-channel MIMO RF analogue front end, designed under an exclusive partnership with Comlab, as a companion to the Lyrtech VHS-ADCDAC Virtex-4 family of advanced development platforms, which provides the analogue-to-digital-to-analogue multichannel conversion interface and digital signal processing capabilities.
When combined with additional DSP/FPGA processing boards, such as the SignalMaster Quad Virtex-4, it becomes a complete and very high performance MIMO RF development system.
"The integration of Lyrtech's signal processing products with Comlab's quad dual-band RF transceiver creates a unique solution that is ideal for key applications such as MIMO advanced basestations, multiple-antenna systems, adaptive beamformers, wireless routers and multichannel analysis", says Benoit Fleury, Vice President Sales and Marketing, Lyrtech.
Single-transmit single-receive antenna wireless systems can reach 1Gbit/s transmission rates but face other limitations associated with the various phenomena that occur not only in WLAN and A/V but also in outdoor wireless wide area networks (WWAN).
For example, the phenomenon known as fading, which consists on random fluctuations in signal level on nonline-of-sight propagation, is resolved by advanced MIMO systems such as the quad dual-band RF transceiver.
A MIMO advanced basestation takes advantage of interference and multi-path phenomena by using multiple antennas to send multiple parallel signals from a single transmitter.
In an urban environment, these signals will encounter interference such as trees and buildings.
The signals will bounce off the object and continue on their way to the receiver but from different directions.
Multipath occurs when the signals arrive at the receiver at various times.
With MIMO, the receiving end uses an algorithm or special signal processing to sort out the multiple signals to produce one signal that embodies the originally transmitted data.
The main advantages of the MIMO technology are reduced costs, a better experience for the mobile user (moving at speeds up to 125km/h), as well as greater bandwidth, reach and spectral efficiency than the alternative antenna technology.
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