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Application Notes
Overview
In a radar system, the use of modulation on pulse for “compression” provides enhanced spatial resolution as well as extended range for a given output power level. Consequently, this technique is widely used in current- and next-generation radar systems.
Unfortunately, traditional RF pulse measurements become less effective predictors of performance in radars that use pulse compression. For example, the width of an uncompressed radar pulse is directly related to spatial resolution. In contrast, the resolution depends on pulse width, chirp bandwidth and chirp linearity in a compressed radar system that uses linear frequency modulated (LFM) chirp pulses.
Within the field of radar development, a technique called the time sidelobe level (SSL) measurement has emerged as a viable solution to predict performance. This method distills a wide range of potential signal impairments down to a simple metric that can be used to determine if radar performance will fit the intended application.
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