A Compact Test System for Simulating Multipath Interference


Fading and inter-symbol interference (ISI) arising from multipath effects are a common source of both latency and packet errors in wireless communications. Test methods often require large environments to produce long delays that are enough to affect the communications between a transmitter and receiver. This paper presents a simple, compact test method to produce and isolate effects from multipath interference simulating these effects produced by discrete distances. Signals with controlled delays can be created and combined using multiple antennas in two isolated small (2 foot/60 cm) cubes constructed with microwave absorber. We demonstrated this with a pulsed RF signal and a signal from an 802.11 n access point with an internal antenna. This method can be further extended to provide a compact test-bed for almost any wireless interference or coexistence test.

Share and Cite:

Eslami, M. and Bassen, H. (2014) A Compact Test System for Simulating Multipath Interference. Open Journal of Antennas and Propagation, 2, 9-20. doi: 10.4236/ojapr.2014.22002.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Moschitta, A., Macii, D., Trenti, F., Dalpez, S. and Bozzoli, A. (2012) Characterization of a Geometrical Wireless Sig- nal Propagation Model for Indoor Ranging Techniques. 2012 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 13-16 May 2012, 2598-2603.
[2] Salih Alj, Y., Despins, C. and Affes, S. (2008) Impact of Multipath Interference on the Performance of an UWB Fast Acquisition System for Ranging in an Indoor Wireless Channel. 6th Annual Communication Networks and Services Research Conference, CNSR 2008, 5-8 May 2008, 390-396.
[3] Rappaport, T. (2002) Wireless Communications. 2nd Edition, Prentice Hall.
[4] Li, Z., Zou, W.-X. and Li, B. (2011) Analysis on Coexistence of Ultra Wideband with OFDM-Based Communication Systems. IEEE Transactions on Electromagnetic Compatibility, 53, 823-830. http://dx.doi.org/10.1109/TEMC.2011.2159979
[5] Sharma, G.V.V. and Srinivasan, S.H. (2005) Symbol Detection in CDMA-OFDM Coexistence. IEEE 16th Internatio- nal Symposium on Personal, Indoor and Mobile Radio Communications, 2531-2534.
[6] Jo, H.-S., Yoon, H.-G., Lim, J., Chung, W.-G., Yook, J.-G. and Park, H.-K. (2006) The Coexistence of OFDM-Based Systems beyond 3G with Fixed Service Microwave System. Journal of Communications and Networks, 8, 187-193. http://dx.doi.org/10.1109/JCN.2006.6182747
[7] LaSorte, N.J., Rajab, S.A. and Refai, H.H. (2012) Experimental Assessment of Wireless Coexistence for 802.15.4 in the Presence of 802.11g/n. 2012 IEEE International Symposium on Electromagnetic Compatibility (EMC), 6-10 August 2012, 473-479.
[8] Nobles, P. and Halsall, F. (1997) Delay Spread and Received Power Measurements within a Building at 2 GHz, 5 GHz and 17 GHz. Antennas and Propagation, Tenth International Conference on (Conference Publication No. 436), 2, 14- 17 April 1997, 319-324.
[9] Kuzmin, L.V., Starkov, S.O. and Kletzov, A.V. (2009) Performance of Wireless Communication System with Ultrawideband Chaotic Signals in the Multipath Channel. Progress in Electromagnetics Research Symposium Proceedings, Moscow, 18-21 August 2009, 1493-1497.
[10] Remley, K.A., Koepke, G., Holloway, C.L., Grosvenor, C., Camell, D., Ladbury, J., Johnk, R.T. and Young, W.F. (2009) Radio Wave Propagation into Large Building Structures, Part 2, Characterization of Multipath. IEEE Transactions on Antennas Propagation, 58, 1290-1301.
[11] Genender, E., Holloway, C.L., Remley, K.A., Ladbury, J., Koepke, G. and Garbe, H. (2008) Use of Reverberation Chamber to Simulate the Power Delay Profile of a Wireless Environment. 2008 International Symposium on Electromagnetic Compatibility—EMC Europe, 8-12 September 2008, 1-6.
[12] Fielitz, H., Remley, K.A., Holloway, C.L., Zhang, Q., Wu, Q. and Matolak, D.W. (2010) Reverberation-Chamber Test Environment for Outdoor Urban Wireless Propagation Studies. IEEE Antennas and Wireless Propagation Letters, 9, 52-56.
[13] Seidman, S., Kainz, W., Ruggera, P. and Mendoza, G. (2011) Wireless Coexistence and EMC of Bluetooth and 802.11b Devices in Controlled Laboratory Settings. Open Biomedical Engineering Journal, 5, 74-82.
[14] Howitt, I. and Shukla, A. (2008) Coexistence Empirical Study and Analytical Model for Low-Rate WPAN and IEEE 802.11b. IEEE Wireless Communication and Networking Conference, 31 March-4 April 2008.

Copyright © 2023 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.