![]() The noise is always broadband and the noise pulses have a statistical distribution. The Pulse Compression Ratio (PCR) is the ratio of the time length of the uncompressed transmitted pulse to the length of the compressed pulse. with time-dependent coded pulse-phase modulation.phase modulated (or called Phase Modulation on Pulse, PMOP).with time-dependent coded frequency modulation (e.g.frequency modulated (or called Frequency Modulation on Pulse, FMOP).Pulse compression with phase modulation.Pulse compression with non-linear frequency modulation.Pulse compression with linear frequency modulation. ![]() Several modulation methods can be applied. Now a frequency comparison can be made in the received echo,įor example, which makes it possible to localize the reflecting object within the pulse. To improve the range resolution for a relatively long transmission pulse duration, the transmission pulse is modulated internally. Two reflective objects located within the spatial extent of the pulse are only displayed as one target. The range resolution of a simple pulse-modulated radar depends on the pulse duration. Pulse compression combines the energetic advantages of very long pulses with the advantages of very short pulses. ( Compressed, HIgh- Resolution Pulse, CHIRP). The term CHIRP–Radar is often used in publications This method is also known as intra-pulse modulation ( modulation on pulse, MOP)īecause the transmitted pulse got a time-dependent modulation internally. Pulse compression is a method for improving the What is an Intrapulse Modulation? Intrapulse Modulation and Pulse Compression Figure 1: Input and output signals of a pulse compression stage, the received signal in noise is hardly noticeable, so the pulse compression results in a clear echo signal.
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