多相脉冲压缩编码波形产生及压缩处理技术

The Waveform Generation and Pulse Compression Technology for Polyphase Code

由线性调频信号导出的P3、P4多相码是一类常见的脉冲压缩信号 ,这类信号具有一些有用的特性。主要研究了P3、P4多相码信号的数字波形产生及压缩处理方法 ,提出了两种基于直接数字合成 (directdigitalsynthe sis ,DDS)技术的多相码波形产生方法。分析讨论了几种降低输出旁瓣电平的压缩处理技术 ,即经典的窗函数幅度加权技术、最小二乘幅度和相位加权技术和压缩后两采样滑窗处理技术。给出了一些计算机仿真结果 ,表明了这几种压缩处理技术的有效性。

The P3, P4 polyphase codes derived from linear frequency modulazed signal are common pulse compression waveforms which have some useful properties. The generation and pulse compression of P3 and P4 codes are discussed. Two methods based on direct digital synthesis (DDS) technology for the generation of P3, P4 polyphase code waveforms are proposed and some sidelobe reduction technoiques are presented, including the classical window function amplitude weighting, the least squared amplitude and phase weighting and the post compression two sample sliding processing. Finally some simulation results demonstrate the effectiveness of the sidelobe reduction techniques.\;