In the LFMCW radar system, the echo signal of moving target with acceleration has Doppler aberration. It will cause target detection performance deterioration and parameter estimation loss. The Polynomial Phase Transform (PPT) only can estimate the single target acceleration in the same range cell. This paper presents a method, which modified the PPT algorithm to process the Doppler signal of multiple targets in the same range cell. It can accurately estimate the acceleration and velocity of multi-target and improve the detection performance with less calculating quantity.

Aiming at the influence of high acceleration modulation of LFMCW radar echo signal in the short range and high resolution applications on missile, satellite, and plane, we derived the expression of acceleration resolution for Linear FMCW (LFMCW) signal. It is concluded that the acceleration resolution is inversely proportional to the square of the effective time width. We also analyzed the influence on the Doppler resolution and time delay caused by the unknown acceleration. It is concluded that the increase of time width doesn't necessarily enhance the Doppler resolution because of the exist of acceleration, delay resolution decrease with the increase of unknown acceleration. Computer simulations justified these conclusions.

Aiming at solving the distance and velocity decouple problem for moving target in Linear FMCW (LFMCW) radar signal processing, a multiple repetition frequency waveform is adopted and a Doppler frequency cluster (DFS) algorithm is proposed, which is capable of recovering true velocity from the coupled velocity estimation directly. Aiming at solving resolution of multiple targets, a match algorithm based on mean square error is also proposed. The combination of the above two methods realizes distance and velocity decoupling for multiple moving targets. The result of simulation verified the effectiveness of the methods, the velocity estimate performance of DFS algorithm improve 2.5dB contrast to Chinese remainder theorem.

Aiming at the Doppler spectrum aberration and range-velocity coupling phenomena in accelerated moving environment for millimeter-wave short-range linear FMCW radar, a novel method is presented, which can estimate the target's acceleration, velocity and range effectively. The method can also compensate the Doppler signal with the estimated acceleration, solve Doppler aberration and range-velocity coupling, and improve the detection performance and parameter estimation precision of the accelerated targets. The method has less computation, and the arithmetic is solidity.

本文通过理论分析和实验研究，证明了线性调频连续波雷达可以用单通道获得等效的正交双通道性能，为简化相干线性调频连续波雷达的通道结构提供了理论依据。

本文从对称三角线性调频连续波雷达体制的特点出发

在线性调频连续波（LFMCW）雷达中，加速度运动目标回波存在多普勒频谱畸变现象，造成目标检测性能和参数估计精度损失。本文提出的方法首先将多普勒信号作多项相位变换，并在变换后的信号频谱中估计出目标的加速度，然后对多普勒信号进行加速度补偿，最后在补偿后的多普勒信号频谱中估计出目标速度。仿真分析表明这种方法能够以较小的运算量，达到改善加速度运动目标的检测性能和速度估计精度的目的。

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本文提出了一种用于线性调频述线波（LFM-CW）雷达的信号处理新方法。该方法用带通滤波器在频域内实现差拍信号的距离分段。然后用第一距离段所欠采样率对每个距离段进地采样和FFT处理。在距离分段单元数很大时，这种方法可以大大降低LEM-CW雷达对信号处理器的要求。