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using narrow band techniques. For our present purposes we want to look at stretch processing as applied to LFM waveforms. It turns out that the concepts of stretch processing appear in other applications such as FMCW radar and, as we will see later, SAR processing. We consider a transmit waveform of the form. ( ). 2 rect.
Why study ISR? •You get to learn about many useful things, in substantial depth. -Plasma physics. -Radar. -Coding. -Electronics (Power, RF, DSP). -Signal Processing. •But what if I probably won't stay in this field? -See above! 2
24 Dec 2009 this chapter, two pulse compression techniques are discussed. The first tech- nique is known as correlation processing which is predominantly used for nar- row band and some medium band radar operations. The second technique is called stretch processing and is normally used for extremely wide band
This example shows how to estimate the range of a target using stretch processing in a radar system that uses a linear FM pulse waveform. Linear FM waveform is a popular choice in modern radar systems because it can achieve high range resolution by sweeping through a wide
17 Jun 2004 Outline. • Why is pulse compression needed? • Pulse compression, the compromise. • How it works. • Simplified view of concept. • Pulse coding. – Phase-coded pulse. – Chirp (linear FM). • Receiver signal processing. • Window functions and their effects
Pulse compression is a signal processing technique commonly used by radar, sonar and echography to increase the range resolution as well as the signal to noise ratio. This is achieved by modulating the transmitted pulse and then correlating the received signal with the transmitted pulse.
7 May 2012 Current 0.13 µm SiGe BiCMOS technology allows for most of the components for an X- band radar to be fabricated on a single IC. This paper discusses system design and analysis of a stretch processing radar. The design uses a single ADC, no matched filters, and wide- band waveforms. Chapters include
The second tech- nique is called “stretch processing" and is normally used for extremely wide band radar operations. Digital pulse compression will also be briefly pre- sented. 7.1. Time-Bandwidth Product. Consider a radar system that employs a matched filter receiver. Let the matched filter receiver bandwidth be denoted
Stretch Processing. Reasons for Using Stretch Processing. Support for Stretch Processing. Stretch Processing Procedure. Reasons for Using Stretch Processing. The linear FM waveform is popular in radar systems because its large time-bandwidth product can provide good range resolution. However, the large bandwidth
a narrower output pulse with a higher amplitude. As an example of an application of the pulse compression with linear FM waveform can be mentioned the air defence radar AN/FPS-117 . Filters for linear FM pulse compression radars are now based on two main types. Digital processing (following of the A/D- conversion).
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