pulskompressionsradar

Pulskompressionsradar is a technique used in radar systems to achieve high range resolution while simultaneously transmitting a long pulse. Traditionally, a long pulse provides good energy for detection but poor range resolution, meaning it cannot distinguish between closely spaced targets. Conversely, a short pulse offers good range resolution but has less energy, limiting detection range.

Pulskompressionsradar overcomes this limitation by transmitting a long pulse that has been modulated in some way, typically in frequency or phase. Upon reception, the echo of this long, modulated pulse is passed through a matched filter. This filter is designed to correlate the received signal with the transmitted waveform. The correlation process effectively compresses the long pulse into a much shorter, high-amplitude pulse.

The key benefit of pulskompressionsradar is that it achieves the range resolution of a short pulse while retaining the detection performance of a long pulse. This is because the total energy transmitted is the same as for a long pulse, leading to improved signal-to-noise ratio. The compression process also offers a degree of processing gain, further enhancing the detection of weak targets.

This technique is widely employed in various radar applications, including weather radar, air traffic control radar, and military surveillance radars, where precise target location and effective detection are critical. The ability to transmit more energy for better detection and then compress it for better resolution makes pulskompressionsradar a highly efficient and versatile radar technology.