A Highly Modular 77-GHz FMCW Radar Sensor Prototype for Multi Target Tracking Applications
ieeexplore.ieee.org/document/4751780
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The spectrum of the sampled raw data by the ADCs is calculated using the discrete Fourier transform (DFT). Potential candidates are detected by a constant false alarm rate (CFAR) algorithm. Furthermore the CFAR algorithm is supported by the tracking filter with the knowledge of potential tracks. A detailed discussion on CFAR algorithms for radar applications is e.g. given in [7] and [8].
The ramp sequence for LRR applications in the Sect. IV, consisting of ten distinct up- and downchirps, is plotted in Fig. 2. The duration of the first up/downchirp of the sequence is equal to 1024μs, the duration of each following up/downchirp is increased by 64μs compared to the predecessing up and downchirp. The total length of the ramp sequence complies to approximately 26.2 ms, resulting in a ramp sequence repetition rate of 38 Hz. For an in-depth discussion on ramp sequence design it is referred to [4]. The one-bin range resolution for a bandwidth of 1.024 GHz is calculated to Δr=0.146m.
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