Search

Multitone harmonic radar is presented. The radar transmits multiple closely-spaced tones and receives nonlinear mixing products as well as harmonics. Harmonic and multitone responses are recorded from commercially-available RF devices. An original method for discriminating between electronic targets, by receiving at least two nonlinear mixing products near a harmonic, is presented. Target detection is demonstrated experimentally for a novel pulsed two-tone harmonic radar. Experimental results are extrapolated to estimate radar design parameters to achieve a realistic standoff range. [ABSTRACT FROM PUBLISHER]

A new method for the elimination of power line interference of potentially time-varying frequency, phase, and amplitude on telephone loops is presented. The proposed method is based on adaptive estimation, and subsequent elimination, of the fundamental and individual harmonic components of the induced power signal and tracking their variations over time. The structure and mathematical formulation of the proposed technique are presented, and its performance is demonstrated in a variety of scenarios. Superior performance of the proposed method over existing techniques is observed throughout all experiments. The proposed algorithm presents a simple and efficient method of elimination of narrowband interference of a potentially nonstationary nature that is suitable for real-time applications due to its structural simplicity. [ABSTRACT FROM AUTHOR]

A new method of measurement of harmonics of potentially time-varying frequency is presented. The proposed method is based on adaptive estimation of the fundamental and individual harmonic components of the power signal and tracking their variations over time. The structure and mathematical formulation of the proposed technique are presented and its performance is demonstrated in a variety of scenarios where the frequency of the power signal undergoes variations over time. Throughout the experiments, the proposed technique is compared to two of the most promising techniques recently reported in the literature. [ABSTRACT FROM AUTHOR]