As an ultra-wideband microwave signal, amplitude shift keying (ASK) can be used in many applications, such as electronic warfare, wireless communications and modern radar systems. Initially, ASK microwave signals are generated based on radio frequency analog mixing and direct digital synthesis, which limit the carrier frequency and coding bit rate of generated signals. Compared with the traditional microwave technology, microwave photonics technique can generate ASK microwave signals with high frequency and large bandwidth.
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Source: Phys.org