MANHASSET, N.Y. A wireless broadband emulator developed by Azimuth Systems Inc. is designed to test WiMax and LTE wireless networks.
Also, AT4 Wireless has unveiled its E2010 Broadband Wireless Test Set for life testing LTE test products.
Azimuth's ACE MX provides advanced channel emulation features required for testing advanced wireless infrastructure equipment and devices. It also includes backward-compatibility channel emulation features required to test 2G/3G cellular products.'
LTE and WiMax systems both use multiple-input, multiple-output (MIMO) and orthogonal frequency-division multiplexing technologies. MIMO exploits real-world channel conditions such as multipath and fading to improve channel performance. As a result, laboratory testing of MIMO systems requires the use of channel emulation techniques such as dynamic channel conditioning, shadow fading and complex antenna correlation.
The ACE MX's channel modeling and emulation capabilities are said to enable equipment manufacturers and service providers to reliably and accurately characterize the operation and performance of MIMO-based systems under a multitude of real-world RF conditions.
The signal between transceiver and mobile device is duplicated by reflections; it varies in strength due to mobile device movement. One way to test signals is by placing a cable between the two. While providing a test bed, the scheme does not yield real-world channels for the purposed of testing. On the other hand, a channel emulator recreates repeatable, real-world multipath and fading conditions in the lab.
Key features of the ACE MX include dynamically programmable parameters such as propagation delay, output power, Doppler and preprogrammed, standard industry channel models such as 3GPP, 3GPP2, ITU and SCME.
The emulator can be configured from 1x1 SISO to 8x4 MIMO setups.
George Reed, vice president of marketing at Azimuth Systems, claimed ACE MX is the first channel emulator designed to test the smart antenna performance requirements of 3GPP, IEEE 802.16 and IEEE 802.11n standards needed to ensure the delivery of LTE, WiMax, Wi-Fi and 2G/3G cellular infrastructure equipment and devices.
The first ACE MX systems have been deployed "at a leading cellular operator and at a Tier One LTE original equipment manufacturer, and will be generally available this month," Reed added.
The AT4 E2010 test set incorporates eNodeB emulation capabilities plus parametric measurements in a single box. It supports both RF and protocol testing.
The AT4 wireless E2010 Broadband Wireless Test Set is a multi-RAT (radio access technology) platform that integrates dual radio interfaces, real-time physical layer and channel emulators and a 3GPP compliant Rel-8 protocol stack. It including support for MIMO 2x2 (future 4x4) and multiple cell emulation.
AT4 Wireless has a Wireless Certification & Testing Laboratory and claims a portfolio of products that ranges from conformance, regulatory and interoperability testing for global compliance services.