论文标题
基于OFDM的关节雷达和通信系统的有效雷达接收器
An Efficient Radar Receiver for OFDM-based Joint Radar and Communication Systems
论文作者
论文摘要
我们在这项工作中提出了一个用于正交频率除法（OFDM）传输的雷达检测系统。我们假设传输天线TX与单静力雷达共裂。后者知道传输的信号并倾听来自固定目标或移动目标反射的回声。我们使用2D周期图估算目标参数（范围和速度）。此外，我们使用离散的傅立叶变换通道估计（DFT-CE）提高了低信号与噪声比（SNR）条件的估计性能，并且我们表明，用于通信采用的Zadoff-Chu预编码（ZCP）不会在良好的SNR条件下降低雷达估计。此外，由于数据矩阵的尺寸可能比要检测到的目标数量要大得多，因此我们提出了一个稀疏的傅立叶变换基于基于傅立叶傅立叶投影夹（FPS-SFT）算法，以降低2D-二级图的计算复杂性。在77GHz工业，科学和医学（ISM）频段中，适当的系统参数化允许达到30.52 cm的范围分辨率和0.67 m/s的速度分辨率，并将期间图计算时间降低到98.84％左右。
We propose in this work a radar detection system for orthogonal-frequency division multiplexing (OFDM) transmission. We assume that the transmitting antenna Tx is colocated with a monostatic radar. The latter knows the transmitted signal and listens to echoes coming from the reflection of fixed or moving targets. We estimate the targets parameters (range and velocity) using a 2D-Periodogram. Moreover, we improve the estimation performance in low signal to noise ratio (SNR) conditions using the discrete Fourier transform channel estimation (DFT-CE) and we show that Zadoff-Chu precoding (ZCP) adopted for communication, does not degrade the radar estimation in good SNR conditions. Furthermore, since the dimensions of the data matrix can be much larger than the number of targets to be detected, we propose a sparse Fourier transform based Fourier projection-slice (FPS-SFT) algorithm to reduce the computational complexity of the 2D-Periodogram. An appropriate system parameterization in the 77GHz industrial, scientific and medical (ISM) band, allows to achieve a range resolution of 30.52 cm and a velocity resolution of 0.67 m/s and to reduce the periodogram computation time up to around 98.84%.
