A dual-DDS-based, mm-wave, heterodyne, FMCW radar with a 108-GHz center frequency, a 600-MHz bandwidth, and a 3-MHz IF was used to characterize backscatter from static clutter and a small, fast-moving target. Employing a symmetric triangular frequency-vs-time FMCW waveform with 500-us up-chirp and down-chirp durations, signals from a reusable paintball (reball) with a radial velocity of about 90 m/s were measured in an indoor, clutter-rich environment over intervals of ∼100-ms. Unambiguous estimation of the reball's range and radial velocity were derived from observations made during both the up-chirp and down-chirp observations. Specifically, when the reball's echo signal was obscured or degraded by coincident clutter (e.g. during down-chirp), estimates of its amplitude characteristics were obtained from measurements when the reball and clutter were spectrally separable (during up-chirp). Consequently, it is demonstrated that the clutter in this context can be suppressed by more than 25 dB.
展开▼
机译：基于双DDS的毫米波外差FMCW雷达具有108 GHz的中心频率，600 MHz的带宽和3 MHz的IF来表征静态杂波和小的，快速移动的反向散射目标。利用具有500us向上线性调频和向下线性调频的持续时间的对称三角频率与时间的FMCW波形，在室内杂乱无章的室内测量了来自可重复使用彩弹（重弹）的信号，其径向速度约为90 m / s。丰富的环境，间隔约100毫秒。从上-和下chi的观测中得出的观测结果，可以清楚地估计出球的射程和径向速度。具体地，当重合球的回波信号被一致的杂波遮挡或降级时（例如在降-期间），则当重球和杂波在频谱上可分离时（在-时），通过测量获得其幅度特性的估计值。因此，证明了在这种情况下的杂波可以被抑制超过25dB。
展开▼
