Radio Signal Direction Finding in the Urban Radio Environment

Richard W. Klukas and Michel Fattouche

Abstract:	Radio direction finding utilizing the MUSIC (MUltiple Signal ]dentification andClassification) algorithm is investigated for land vehicle location systems in an urban radio environment. A “virtual” antenna array is used to overcome problems inherent to MUSIC when operating in a coherent or highly correlated signal environment. Based on certain assumptions made regarding the nature of the multipath radio environment, triangulation is possible by estimating the angle of arrival of the line of sight component in the received signal. Computer simulations am used to analyze the ability of certain techniques, which incorporate MUSIC, to achieve this. Since triangulation may be narrowband in nature, no new spectrum is required. Instead the current allocated cellular telephone bands as well as the existing base station hardware could be exploited resulting in a cost efficient and easily implemented system. A further reduction in cost may be realized by processing received signal data while traveling along a nonlinear trajectory. In this way, an unambiguous angular spectrum is obtained with only one antenna.
Published in:	Proceedings of the 1993 National Technical Meeting of The Institute of Navigation January 20 - 22, 1993 Parc 55 Hotel San Francisco, CA
Pages:	151 - 159
Cite this article:	Klukas, Richard W., Fattouche, Michel, "Radio Signal Direction Finding in the Urban Radio Environment," Proceedings of the 1993 National Technical Meeting of The Institute of Navigation, San Francisco, CA, January 1993, pp. 151-159.
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