Performance analysis of dual-frequency CW radars for motion detection and ranging in urban sensing applications

Fauzia Ahmad; Moeness G. Amin; Paul D. Zemany

doi:10.1117/12.719856

3 May 2007 Performance analysis of dual-frequency CW radars for motion detection and ranging in urban sensing applications

Fauzia Ahmad, Moeness G. Amin, Paul D. Zemany

Author Affiliations +

Proceedings Volume 6547, Radar Sensor Technology XI; 65470K (2007) https://doi.org/10.1117/12.719856
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

Single frequency (Doppler) radars cannot be used in target range estimation due to the associated large range ambiguities. An additional frequency can be used to increase the maximum unambiguous range to values adequate for range estimation of moving targets within buildings and enclosed structures. The dual-frequency technique uses phase comparison of the transmitted and received CW signals to provide an estimate of the target range. It offers the benefit of reduced complexity, fast computation, and real time target tracking. However, the dual-frequency approach for range estimation can be compromised due to the presence of drift in frequency, I/Q mismatch, and noise. In this paper, we analyze the effect of I/Q mismatch and noise on the bias and variance of the target range estimate. We consider targets with both linear and simple harmonic motions. Computer simulations are provided for illustrating the performance as a function of signal-to-noise ratio.

Citation Download Citation

Fauzia Ahmad, Moeness G. Amin, and Paul D. Zemany "Performance analysis of dual-frequency CW radars for motion detection and ranging in urban sensing applications", Proc. SPIE 6547, Radar Sensor Technology XI, 65470K (3 May 2007); https://doi.org/10.1117/12.719856

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