Azimuth Systems, Inc.

Azijuth Networks, Inc.

Azimuth Networks, Inc.

John Robert Griesing

Charles R Wright

Fanny Mlinarsky

Steven A Mulawski

Francis Fothergill

Derek Jasnoch

A heterogeneous network scenario is simulated using a combination of real cells, real user devices, and a multi-cell network emulator which provides emulated cells, emulated real devices, and channel emulation. The multi-cell network emulator may utilize playback files and signals from the real cells and real user devices to generate emulated cell signals and emulated real device signals. Further, a single real signal can be utilized to generate multiple emulated signals.

Small cell interference emulator

Improved performance testing of a wireless device is disclosed. The system is particularly suited to testing devices having multiple antennas. The device under test (DUT) is placed in a reverberation chamber with antennas for transmission of a test signal to the DUT. The number of antennas deployed in the reverberation chamber and placement of those antennas is selected such that no line-of-sight transmission component exists from test system antenna to DUT antenna, and the number of antennas deployed in the reverberation chamber is greater than the spatial rank of the signal. The antennas are driven by a programmable channel emulator capable of generating fading, correlation, delay, Doppler and other channel condition phenomena. Furthermore, the antennas are driven individually by a plurality of independent fading processes. The combination of the programmable channel emulator and reverberation chamber creates a multipath environment which simulates signals arriving from different locations, with different delays, as well as the simulation of device motion. The system also includes instruments to produce test signals and to measure the performance of the DUT.

Testing performance of a wireless device

A method and system for simulating a wireless environment is provided including a central RF combining component; a plurality of connection nodes, each connection node in RF connection with the central RF combining component through a programmable attenuation component; wherein the programmable attenuation components are controlled by a controller console, the controller console maintaining information regarding simulated spatial positioning of the plurality of connection nodes in the simulated wireless environment, and adjusting the programmable attenuation components to appropriately simulate the simulated spatial positioning of the connection nodes in the simulated wireless environment. Additionally, an RF module for creating and receiving RF signals in a test environment is provided.

Test system for simulating a wireless environment and method of using same

An RF shielded enclosure that is configurable for a variety of testing requirements, yet still maintain proper RF isolation. User-installable modules that are specialized for the desired interface, ventilation or monitoring use can be installed on the enclosure to allow interfacing between a device under test installed inside the chamber and testing and controlling equipment outside the enclosure. The enclosure is easy to manufacture as a one or multi-chamber enclosure, allowing further flexibility for testing.

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Sudbury, MA, United States of America

John Robert Griesing