论文标题
使用多色调正弦频率调制的相编码传输波形的连续相调制
Continuous Phase Modulation of Phase Coded Transmit Waveforms using Multi-Tone Sinusoidal Frequency Modulation
论文作者
论文摘要
相位编码（PC）波形具有理想的自动相关函数（ACF）属性，可用于雷达和声纳系统。但是，由于波形中芯片之间突然的相变，它们的光谱泄漏具有高光谱泄漏。本文介绍了一种使用多色调正弦频率调制（MTSFM）模型来减少PC波形光谱泄漏的连续相调制（CPM）的方法。 MTSFM-CPM模型代表PC波形的瞬时相，作为有限的傅立叶系列。该表示可以平滑芯片之间的突然相变，从而产生频谱紧凑的波形。 PC波形瞬时相的平滑性将扰动引入了波形的ACF主机和Sidelobe结构。调整MTSFM-CPM波形的参数可完善其ACF的主障碍和Sidelobe结构，同时还可以保留其紧凑的光谱形状。
Phase Coded (PC) waveforms possess desirable Auto-Correlation Function (ACF) properties for use in radar and sonar systems. However, their spectra possess high spectral leakage due to the abrupt phase transitions between the chips in the waveform. This paper describes a method of Continuous Phase Modulation (CPM) to reduce a PC waveform's spectral leakage using the Multi-Tone Sinusoidal Frequency Modulation (MTSFM) model. The MTSFM-CPM model represents the PC waveform's instantaneous phase as a finite Fourier series. This representation smooths the abrupt phase transitions between chips resulting in a spectrally compact waveform. This smoothing of the PC waveform's instantaneous phase introduces perturbations to the waveform's ACF mainlobe and sidelobe structure. Adjusting the MTSFM-CPM waveform's parameters refines its ACF mainlobe and sidelobe structure while also preserving its compact spectral shape.
