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The article has illustrated a flexible approach in evaluating potential coexistence issues between wireless and radar signals in an R&D laboratory environment. The test solution combines a design simulation with a precision AWG to evaluate different interference scenarios. Design simulation is used to create a multi-emitter test signal spectrum which includes GSM, EDGE, and LTE emitters, as well as two S-band radar emitters, and two WCDMA emitters. The multi-emitter test signal is downloaded to a precision AWG to create a test signal environment to examine potential coexistence issues between LTE and radar emitters.

Several case studies are shown, including two scenarios which illustrates how an S-band radar interferer impacts LTE EVM performance and a simulation case study which illustrates how LTE coded BER performance is impacted by an S-band radar interferer as the interferer’s center frequency is swept. Although the case studies shown in this article utilize arbitrary signal scenarios to illustrate the flexibility of this solution, they highlight how potential coexistence issues could be evaluated in the R&D laboratory environment with user-defined signal scenarios.

Note: Mobile WiMAX is a registered trademark of the WiMAX Forum.

Greg Jue, Applications Development Engineer (Aerospace/Defense Applications)

Agilent Technologies, 5301 Stevens Creek Blvd., Santa Clara, CA 95051; (781) 860-5426, (800) 882-7426, FAX: (781) 860-5437.

References

1. David Leiss, “Military Radars and WLANs Wrestle with Interference Issues,” Agilent Technologies, RTC Magazine, November 2004.

2. “Spectrum monitoring for the fleet,” Naval Sea Systems Command.

3. “Navy plans ship-based LTE for close quarters communication,” Engadget, May 2012.

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This file type includes high resolution graphics and schematics when applicable.