Simulation of Linear Frequency Modulated (LFM) Pulse Signals

In pulse compression radar systems, LFM signals have found widespread application. Utilizing the large bandwidth and long pulse characteristics of linear frequency modulated signals, wide pulse transmission is commonly employed to enhance the average transmit power, guaranteeing adequate operational range. During the reception phase, corresponding pulse compression algorithms are implemented to achieve narrow pulses, which improves range resolution and effectively addresses the inherent conflict between radar detection range and range resolution. The application of pulse compression technology not only enhances the resolution and detection capabilities of radar systems but also strengthens anti-jamming performance and operational flexibility, enabling radar systems to meet diverse functional and multi-mode requirements. Key implementation aspects include generating LFM waveforms through frequency sweep functions and applying matched filter processing (typically using correlation or FFT-based convolution) for pulse compression. The compression ratio is determined by the time-bandwidth product (BT product), where radar simulations often implement these algorithms using digital signal processing techniques with windowing functions to manage sidelobe levels.