Track-conditioned Residual Frequency Estimation For Low-resolution FMCW Radar

Huy Trinh; George Shaker

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arXiv · 2609.30176

Track-conditioned Residual Frequency Estimation For Low-resolution FMCW Radar

Huy Trinh·George Shaker

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Abstract

Low-resolution FMCW radar normally forms a complete range-Doppler representation before detection and tracking. After association, however, the tracker already predicts the target's next range and radial velocity. We propose track-conditioned residual estimation (TCRE), which removes the predicted moving-target phase before spectral formation, summarizes each 64-sample chirp by four coherent complex sums, and estimates the remaining beat-frequency and Doppler-frequency errors from phase progression. We account for the first-order fast-time and slow-time coupling of a moving target and derive the local phase-unwrapping region and three-receiver local information bound. Four summaries retain 93.77 percent of the zero-residual fast-time information while reducing the retained representation by a factor of 16. In 5,000 matched 60-GHz cluttered simulations, TCRE reduces range RMSE by 32.8 to 46.3 percent and velocity RMSE by 58.6 to 71.0 percent relative to a fully specified same-prior residual ZFFT.

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BibTeX RIS

Huy Trinh, George Shaker. 2026-09-24. Track-conditioned Residual Frequency Estimation For Low-resolution FMCW Radar. https://arxiv.org/abs/2609.30176

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