HP 5990-6919EN free download

File name 5990-6919EN.pdf

Using SystemVue's Radar Library to Generate Signals for Radar Design and Verification Application Note 1.0 Introduction Modern radar systems use more complex signal formats working in wide or ultra-wide bandwidths, and operating in different frequencies (e.g., X, Ku and Ka bands). They also use advanced digital signal processing techniques to disguise their operation and overcome strong clutter and jamming in their environment. Addressing this complexity requires the generation of realistic test signals and system-level scenarios that can be used to create and verify the radar signal processing algorithms. While dedicated hardware simulators and field testing are typically used to generate these test signals, both are costly, time consuming and apply later in the design process. This application note presents a less expensive option for generating test signals early in system development. This approach to system-level design and verification uses the Agilent SystemVue environment, a Radar Model Library and commercial off-the-shelf test equipment for generation of continual and pulse radar waveforms, for both algorithm and hardware verification. 2.0 Design Problem Radar signal processing algorithms play a critical role in advanced radar, especially high-performance multi-mode systems. Radar designers require custom reference waveforms with precise amounts of impairment and field conditions when testing or verifying radar components (both baseband and RF). The signal scenarios are used both for troubleshooting and block-level diagnostics, as well as for initial platform integration and validation. Unfortunately, signal processing algorithm creation is complicated, with all resulting algorithms needing to be verified in the complex external environment. Greater interaction between algorithms and signal sources provides a realistic radar environment that allows early maturity and confidence in the radar sys- tem. Creating the advanced algorithms therefore, requires the availability of a sufficient set of models for the various radar elements and functions, including signal generation, transmission, antenna, T/R switching, clutter, noise, jamming, receiving, signal processing, and measurements. 2 3.0 Common Approaches to Radar System Design The two methods commonly employed by radar designers to gene