摘要
针对雷达通信功能共享的波形设计问题,设计一种基于分数阶傅里叶变换的正交频分复用共享信号,并提出一种基于极大似然估计的多散射点雷达信号处理方法.采用脉冲发射方式,脉内调制通信信息,实现数据传输;在雷达一个相干处理周期内,首先对雷达回波序列进行建模,然后利用最大似然估计获得高分辨一维距离像,最后将各脉冲数据按照距离门重排,沿脉冲维进行快速傅里叶变换完成速度估计.仿真结果表明,文中方法能在改善通信误码率性能的情况下,实现多目标的距离速度估计.
A transmitted pattern based on pulsed fractional Fourier transform OFDM is designed to realize the integration of radar and communication.In this designed pattern,radar transmits the FRFT-OFDM pulse,and the communication function is realized within the pulse.Multiple scatter radar signal processing based on maximum likelihood is proposed.The received signal can be written as the convolution of the transmitted sequence and the weighted RCS coefficient after sampling the received signal with a certain delay,then the maximum likelihood method is applied to get the range reconstruction.Finally,FFT is applied along the pulses within a coherent processing interval.Theoretical analysis and simulation results indicate that the proposed method can improve bit error rate performance and obtain multiple scatter range reconstruction and velocities estimation.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2017年第6期48-52,84,共6页
Journal of Xidian University
基金
国家自然科学基金资助项目(61301285
61301281)
